summaryrefslogtreecommitdiff
path: root/arch/x86/kernel/cpu
diff options
context:
space:
mode:
Diffstat (limited to 'arch/x86/kernel/cpu')
-rw-r--r--arch/x86/kernel/cpu/Makefile4
-rw-r--r--arch/x86/kernel/cpu/amd.c55
-rw-r--r--arch/x86/kernel/cpu/bugs.c26
-rw-r--r--arch/x86/kernel/cpu/bugs_64.c33
-rw-r--r--arch/x86/kernel/cpu/common.c93
-rw-r--r--arch/x86/kernel/cpu/mcheck/mce-severity.c2
-rw-r--r--arch/x86/kernel/cpu/mcheck/mce.c200
-rw-r--r--arch/x86/kernel/cpu/mcheck/mce_amd.c357
-rw-r--r--arch/x86/kernel/cpu/mcheck/mce_intel.c41
-rw-r--r--arch/x86/kernel/cpu/mcheck/therm_throt.c57
-rw-r--r--arch/x86/kernel/cpu/mcheck/threshold.c1
-rw-r--r--arch/x86/kernel/cpu/microcode/Makefile2
-rw-r--r--arch/x86/kernel/cpu/microcode/amd.c421
-rw-r--r--arch/x86/kernel/cpu/microcode/core.c83
-rw-r--r--arch/x86/kernel/cpu/microcode/intel.c834
-rw-r--r--arch/x86/kernel/cpu/microcode/intel_lib.c184
-rw-r--r--arch/x86/kernel/cpu/mshyperv.c1
-rw-r--r--arch/x86/kernel/cpu/scattered.c57
-rw-r--r--arch/x86/kernel/cpu/vmware.c86
19 files changed, 1285 insertions, 1252 deletions
diff --git a/arch/x86/kernel/cpu/Makefile b/arch/x86/kernel/cpu/Makefile
index 4a8697f7d4ef..33b63670bf09 100644
--- a/arch/x86/kernel/cpu/Makefile
+++ b/arch/x86/kernel/cpu/Makefile
@@ -20,13 +20,11 @@ obj-y := intel_cacheinfo.o scattered.o topology.o
obj-y += common.o
obj-y += rdrand.o
obj-y += match.o
+obj-y += bugs.o
obj-$(CONFIG_PROC_FS) += proc.o
obj-$(CONFIG_X86_FEATURE_NAMES) += capflags.o powerflags.o
-obj-$(CONFIG_X86_32) += bugs.o
-obj-$(CONFIG_X86_64) += bugs_64.o
-
obj-$(CONFIG_CPU_SUP_INTEL) += intel.o
obj-$(CONFIG_CPU_SUP_AMD) += amd.o
obj-$(CONFIG_CPU_SUP_CYRIX_32) += cyrix.o
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index b81fe2d63e15..71cae73a5076 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -20,6 +20,10 @@
#include "cpu.h"
+static const int amd_erratum_383[];
+static const int amd_erratum_400[];
+static bool cpu_has_amd_erratum(struct cpuinfo_x86 *cpu, const int *erratum);
+
/*
* nodes_per_socket: Stores the number of nodes per socket.
* Refer to Fam15h Models 00-0fh BKDG - CPUID Fn8000_001E_ECX
@@ -314,11 +318,30 @@ static void amd_get_topology(struct cpuinfo_x86 *c)
smp_num_siblings = ((ebx >> 8) & 3) + 1;
c->x86_max_cores /= smp_num_siblings;
c->cpu_core_id = ebx & 0xff;
+
+ /*
+ * We may have multiple LLCs if L3 caches exist, so check if we
+ * have an L3 cache by looking at the L3 cache CPUID leaf.
+ */
+ if (cpuid_edx(0x80000006)) {
+ if (c->x86 == 0x17) {
+ /*
+ * LLC is at the core complex level.
+ * Core complex id is ApicId[3].
+ */
+ per_cpu(cpu_llc_id, cpu) = c->apicid >> 3;
+ } else {
+ /* LLC is at the node level. */
+ per_cpu(cpu_llc_id, cpu) = node_id;
+ }
+ }
} else if (cpu_has(c, X86_FEATURE_NODEID_MSR)) {
u64 value;
rdmsrl(MSR_FAM10H_NODE_ID, value);
node_id = value & 7;
+
+ per_cpu(cpu_llc_id, cpu) = node_id;
} else
return;
@@ -329,9 +352,6 @@ static void amd_get_topology(struct cpuinfo_x86 *c)
set_cpu_cap(c, X86_FEATURE_AMD_DCM);
cus_per_node = c->x86_max_cores / nodes_per_socket;
- /* store NodeID, use llc_shared_map to store sibling info */
- per_cpu(cpu_llc_id, cpu) = node_id;
-
/* core id has to be in the [0 .. cores_per_node - 1] range */
c->cpu_core_id %= cus_per_node;
}
@@ -347,7 +367,6 @@ static void amd_detect_cmp(struct cpuinfo_x86 *c)
#ifdef CONFIG_SMP
unsigned bits;
int cpu = smp_processor_id();
- unsigned int socket_id, core_complex_id;
bits = c->x86_coreid_bits;
/* Low order bits define the core id (index of core in socket) */
@@ -357,18 +376,6 @@ static void amd_detect_cmp(struct cpuinfo_x86 *c)
/* use socket ID also for last level cache */
per_cpu(cpu_llc_id, cpu) = c->phys_proc_id;
amd_get_topology(c);
-
- /*
- * Fix percpu cpu_llc_id here as LLC topology is different
- * for Fam17h systems.
- */
- if (c->x86 != 0x17 || !cpuid_edx(0x80000006))
- return;
-
- socket_id = (c->apicid >> bits) - 1;
- core_complex_id = (c->apicid & ((1 << bits) - 1)) >> 3;
-
- per_cpu(cpu_llc_id, cpu) = (socket_id << 3) | core_complex_id;
#endif
}
@@ -589,11 +596,16 @@ static void early_init_amd(struct cpuinfo_x86 *c)
/* F16h erratum 793, CVE-2013-6885 */
if (c->x86 == 0x16 && c->x86_model <= 0xf)
msr_set_bit(MSR_AMD64_LS_CFG, 15);
-}
-static const int amd_erratum_383[];
-static const int amd_erratum_400[];
-static bool cpu_has_amd_erratum(struct cpuinfo_x86 *cpu, const int *erratum);
+ /*
+ * Check whether the machine is affected by erratum 400. This is
+ * used to select the proper idle routine and to enable the check
+ * whether the machine is affected in arch_post_acpi_init(), which
+ * sets the X86_BUG_AMD_APIC_C1E bug depending on the MSR check.
+ */
+ if (cpu_has_amd_erratum(c, amd_erratum_400))
+ set_cpu_bug(c, X86_BUG_AMD_E400);
+}
static void init_amd_k8(struct cpuinfo_x86 *c)
{
@@ -774,9 +786,6 @@ static void init_amd(struct cpuinfo_x86 *c)
if (c->x86 > 0x11)
set_cpu_cap(c, X86_FEATURE_ARAT);
- if (cpu_has_amd_erratum(c, amd_erratum_400))
- set_cpu_bug(c, X86_BUG_AMD_APIC_C1E);
-
rdmsr_safe(MSR_AMD64_PATCH_LEVEL, &c->microcode, &dummy);
/* 3DNow or LM implies PREFETCHW */
diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c
index bd17db15a2c1..a44ef52184df 100644
--- a/arch/x86/kernel/cpu/bugs.c
+++ b/arch/x86/kernel/cpu/bugs.c
@@ -16,15 +16,19 @@
#include <asm/msr.h>
#include <asm/paravirt.h>
#include <asm/alternative.h>
+#include <asm/pgtable.h>
+#include <asm/cacheflush.h>
void __init check_bugs(void)
{
identify_boot_cpu();
-#ifndef CONFIG_SMP
- pr_info("CPU: ");
- print_cpu_info(&boot_cpu_data);
-#endif
+ if (!IS_ENABLED(CONFIG_SMP)) {
+ pr_info("CPU: ");
+ print_cpu_info(&boot_cpu_data);
+ }
+
+#ifdef CONFIG_X86_32
/*
* Check whether we are able to run this kernel safely on SMP.
*
@@ -40,4 +44,18 @@ void __init check_bugs(void)
alternative_instructions();
fpu__init_check_bugs();
+#else /* CONFIG_X86_64 */
+ alternative_instructions();
+
+ /*
+ * Make sure the first 2MB area is not mapped by huge pages
+ * There are typically fixed size MTRRs in there and overlapping
+ * MTRRs into large pages causes slow downs.
+ *
+ * Right now we don't do that with gbpages because there seems
+ * very little benefit for that case.
+ */
+ if (!direct_gbpages)
+ set_memory_4k((unsigned long)__va(0), 1);
+#endif
}
diff --git a/arch/x86/kernel/cpu/bugs_64.c b/arch/x86/kernel/cpu/bugs_64.c
deleted file mode 100644
index a972ac4c7e7d..000000000000
--- a/arch/x86/kernel/cpu/bugs_64.c
+++ /dev/null
@@ -1,33 +0,0 @@
-/*
- * Copyright (C) 1994 Linus Torvalds
- * Copyright (C) 2000 SuSE
- */
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <asm/alternative.h>
-#include <asm/bugs.h>
-#include <asm/processor.h>
-#include <asm/mtrr.h>
-#include <asm/cacheflush.h>
-
-void __init check_bugs(void)
-{
- identify_boot_cpu();
-#if !defined(CONFIG_SMP)
- pr_info("CPU: ");
- print_cpu_info(&boot_cpu_data);
-#endif
- alternative_instructions();
-
- /*
- * Make sure the first 2MB area is not mapped by huge pages
- * There are typically fixed size MTRRs in there and overlapping
- * MTRRs into large pages causes slow downs.
- *
- * Right now we don't do that with gbpages because there seems
- * very little benefit for that case.
- */
- if (!direct_gbpages)
- set_memory_4k((unsigned long)__va(0), 1);
-}
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 9bd910a7dd0a..729f92ba8224 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -979,6 +979,35 @@ static void x86_init_cache_qos(struct cpuinfo_x86 *c)
}
/*
+ * The physical to logical package id mapping is initialized from the
+ * acpi/mptables information. Make sure that CPUID actually agrees with
+ * that.
+ */
+static void sanitize_package_id(struct cpuinfo_x86 *c)
+{
+#ifdef CONFIG_SMP
+ unsigned int pkg, apicid, cpu = smp_processor_id();
+
+ apicid = apic->cpu_present_to_apicid(cpu);
+ pkg = apicid >> boot_cpu_data.x86_coreid_bits;
+
+ if (apicid != c->initial_apicid) {
+ pr_err(FW_BUG "CPU%u: APIC id mismatch. Firmware: %x CPUID: %x\n",
+ cpu, apicid, c->initial_apicid);
+ c->initial_apicid = apicid;
+ }
+ if (pkg != c->phys_proc_id) {
+ pr_err(FW_BUG "CPU%u: Using firmware package id %u instead of %u\n",
+ cpu, pkg, c->phys_proc_id);
+ c->phys_proc_id = pkg;
+ }
+ c->logical_proc_id = topology_phys_to_logical_pkg(pkg);
+#else
+ c->logical_proc_id = 0;
+#endif
+}
+
+/*
* This does the hard work of actually picking apart the CPU stuff...
*/
static void identify_cpu(struct cpuinfo_x86 *c)
@@ -1103,8 +1132,7 @@ static void identify_cpu(struct cpuinfo_x86 *c)
#ifdef CONFIG_NUMA
numa_add_cpu(smp_processor_id());
#endif
- /* The boot/hotplug time assigment got cleared, restore it */
- c->logical_proc_id = topology_phys_to_logical_pkg(c->phys_proc_id);
+ sanitize_package_id(c);
}
/*
@@ -1144,7 +1172,6 @@ void enable_sep_cpu(void)
void __init identify_boot_cpu(void)
{
identify_cpu(&boot_cpu_data);
- init_amd_e400_c1e_mask();
#ifdef CONFIG_X86_32
sysenter_setup();
enable_sep_cpu();
@@ -1162,51 +1189,6 @@ void identify_secondary_cpu(struct cpuinfo_x86 *c)
mtrr_ap_init();
}
-struct msr_range {
- unsigned min;
- unsigned max;
-};
-
-static const struct msr_range msr_range_array[] = {
- { 0x00000000, 0x00000418},
- { 0xc0000000, 0xc000040b},
- { 0xc0010000, 0xc0010142},
- { 0xc0011000, 0xc001103b},
-};
-
-static void __print_cpu_msr(void)
-{
- unsigned index_min, index_max;
- unsigned index;
- u64 val;
- int i;
-
- for (i = 0; i < ARRAY_SIZE(msr_range_array); i++) {
- index_min = msr_range_array[i].min;
- index_max = msr_range_array[i].max;
-
- for (index = index_min; index < index_max; index++) {
- if (rdmsrl_safe(index, &val))
- continue;
- pr_info(" MSR%08x: %016llx\n", index, val);
- }
- }
-}
-
-static int show_msr;
-
-static __init int setup_show_msr(char *arg)
-{
- int num;
-
- get_option(&arg, &num);
-
- if (num > 0)
- show_msr = num;
- return 1;
-}
-__setup("show_msr=", setup_show_msr);
-
static __init int setup_noclflush(char *arg)
{
setup_clear_cpu_cap(X86_FEATURE_CLFLUSH);
@@ -1240,14 +1222,6 @@ void print_cpu_info(struct cpuinfo_x86 *c)
pr_cont(", stepping: 0x%x)\n", c->x86_mask);
else
pr_cont(")\n");
-
- print_cpu_msr(c);
-}
-
-void print_cpu_msr(struct cpuinfo_x86 *c)
-{
- if (c->cpu_index < show_msr)
- __print_cpu_msr();
}
static __init int setup_disablecpuid(char *arg)
@@ -1462,11 +1436,8 @@ void cpu_init(void)
*/
cr4_init_shadow();
- /*
- * Load microcode on this cpu if a valid microcode is available.
- * This is early microcode loading procedure.
- */
- load_ucode_ap();
+ if (cpu)
+ load_ucode_ap();
t = &per_cpu(cpu_tss, cpu);
oist = &per_cpu(orig_ist, cpu);
diff --git a/arch/x86/kernel/cpu/mcheck/mce-severity.c b/arch/x86/kernel/cpu/mcheck/mce-severity.c
index 631356c8cca4..c7efbcfbeda6 100644
--- a/arch/x86/kernel/cpu/mcheck/mce-severity.c
+++ b/arch/x86/kernel/cpu/mcheck/mce-severity.c
@@ -311,7 +311,7 @@ static int mce_severity_intel(struct mce *m, int tolerant, char **msg, bool is_e
*msg = s->msg;
s->covered = 1;
if (s->sev >= MCE_UC_SEVERITY && ctx == IN_KERNEL) {
- if (panic_on_oops || tolerant < 1)
+ if (tolerant < 1)
return MCE_PANIC_SEVERITY;
}
return s->sev;
diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index a7fdf453d895..132e1ec67da0 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -43,6 +43,7 @@
#include <linux/export.h>
#include <linux/jump_label.h>
+#include <asm/intel-family.h>
#include <asm/processor.h>
#include <asm/traps.h>
#include <asm/tlbflush.h>
@@ -135,6 +136,9 @@ void mce_setup(struct mce *m)
m->socketid = cpu_data(m->extcpu).phys_proc_id;
m->apicid = cpu_data(m->extcpu).initial_apicid;
rdmsrl(MSR_IA32_MCG_CAP, m->mcgcap);
+
+ if (this_cpu_has(X86_FEATURE_INTEL_PPIN))
+ rdmsrl(MSR_PPIN, m->ppin);
}
DEFINE_PER_CPU(struct mce, injectm);
@@ -207,8 +211,12 @@ EXPORT_SYMBOL_GPL(mce_inject_log);
static struct notifier_block mce_srao_nb;
+static atomic_t num_notifiers;
+
void mce_register_decode_chain(struct notifier_block *nb)
{
+ atomic_inc(&num_notifiers);
+
/* Ensure SRAO notifier has the highest priority in the decode chain. */
if (nb != &mce_srao_nb && nb->priority == INT_MAX)
nb->priority -= 1;
@@ -219,6 +227,8 @@ EXPORT_SYMBOL_GPL(mce_register_decode_chain);
void mce_unregister_decode_chain(struct notifier_block *nb)
{
+ atomic_dec(&num_notifiers);
+
atomic_notifier_chain_unregister(&x86_mce_decoder_chain, nb);
}
EXPORT_SYMBOL_GPL(mce_unregister_decode_chain);
@@ -270,17 +280,17 @@ struct mca_msr_regs msr_ops = {
.misc = misc_reg
};
-static void print_mce(struct mce *m)
+static void __print_mce(struct mce *m)
{
- int ret = 0;
-
- pr_emerg(HW_ERR "CPU %d: Machine Check Exception: %Lx Bank %d: %016Lx\n",
- m->extcpu, m->mcgstatus, m->bank, m->status);
+ pr_emerg(HW_ERR "CPU %d: Machine Check%s: %Lx Bank %d: %016Lx\n",
+ m->extcpu,
+ (m->mcgstatus & MCG_STATUS_MCIP ? " Exception" : ""),
+ m->mcgstatus, m->bank, m->status);
if (m->ip) {
pr_emerg(HW_ERR "RIP%s %02x:<%016Lx> ",
!(m->mcgstatus & MCG_STATUS_EIPV) ? " !INEXACT!" : "",
- m->cs, m->ip);
+ m->cs, m->ip);
if (m->cs == __KERNEL_CS)
print_symbol("{%s}", m->ip);
@@ -308,6 +318,13 @@ static void print_mce(struct mce *m)
pr_emerg(HW_ERR "PROCESSOR %u:%x TIME %llu SOCKET %u APIC %x microcode %x\n",
m->cpuvendor, m->cpuid, m->time, m->socketid, m->apicid,
cpu_data(m->extcpu).microcode);
+}
+
+static void print_mce(struct mce *m)
+{
+ int ret = 0;
+
+ __print_mce(m);
/*
* Print out human-readable details about the MCE error,
@@ -569,6 +586,32 @@ static struct notifier_block mce_srao_nb = {
.priority = INT_MAX,
};
+static int mce_default_notifier(struct notifier_block *nb, unsigned long val,
+ void *data)
+{
+ struct mce *m = (struct mce *)data;
+
+ if (!m)
+ return NOTIFY_DONE;
+
+ /*
+ * Run the default notifier if we have only the SRAO
+ * notifier and us registered.
+ */
+ if (atomic_read(&num_notifiers) > 2)
+ return NOTIFY_DONE;
+
+ __print_mce(m);
+
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block mce_default_nb = {
+ .notifier_call = mce_default_notifier,
+ /* lowest prio, we want it to run last. */
+ .priority = 0,
+};
+
/*
* Read ADDR and MISC registers.
*/
@@ -667,6 +710,15 @@ bool machine_check_poll(enum mcp_flags flags, mce_banks_t *b)
mce_gather_info(&m, NULL);
+ /*
+ * m.tsc was set in mce_setup(). Clear it if not requested.
+ *
+ * FIXME: Propagate @flags to mce_gather_info/mce_setup() to avoid
+ * that dance.
+ */
+ if (!(flags & MCP_TIMESTAMP))
+ m.tsc = 0;
+
for (i = 0; i < mca_cfg.banks; i++) {
if (!mce_banks[i].ctl || !test_bit(i, *b))
continue;
@@ -674,14 +726,12 @@ bool machine_check_poll(enum mcp_flags flags, mce_banks_t *b)
m.misc = 0;
m.addr = 0;
m.bank = i;
- m.tsc = 0;
barrier();
m.status = mce_rdmsrl(msr_ops.status(i));
if (!(m.status & MCI_STATUS_VAL))
continue;
-
/*
* Uncorrected or signalled events are handled by the exception
* handler when it is enabled, so don't process those here.
@@ -696,9 +746,6 @@ bool machine_check_poll(enum mcp_flags flags, mce_banks_t *b)
mce_read_aux(&m, i);
- if (!(flags & MCP_TIMESTAMP))
- m.tsc = 0;
-
severity = mce_severity(&m, mca_cfg.tolerant, NULL, false);
if (severity == MCE_DEFERRED_SEVERITY && memory_error(&m))
@@ -1355,7 +1402,7 @@ static void mce_timer_fn(unsigned long data)
iv = __this_cpu_read(mce_next_interval);
if (mce_available(this_cpu_ptr(&cpu_info))) {
- machine_check_poll(MCP_TIMESTAMP, this_cpu_ptr(&mce_poll_banks));
+ machine_check_poll(0, this_cpu_ptr(&mce_poll_banks));
if (mce_intel_cmci_poll()) {
iv = mce_adjust_timer(iv);
@@ -1745,6 +1792,14 @@ static void mce_start_timer(unsigned int cpu, struct timer_list *t)
add_timer_on(t, cpu);
}
+static void __mcheck_cpu_setup_timer(void)
+{
+ struct timer_list *t = this_cpu_ptr(&mce_timer);
+ unsigned int cpu = smp_processor_id();
+
+ setup_pinned_timer(t, mce_timer_fn, cpu);
+}
+
static void __mcheck_cpu_init_timer(void)
{
struct timer_list *t = this_cpu_ptr(&mce_timer);
@@ -1796,7 +1851,7 @@ void mcheck_cpu_init(struct cpuinfo_x86 *c)
__mcheck_cpu_init_generic();
__mcheck_cpu_init_vendor(c);
__mcheck_cpu_init_clear_banks();
- __mcheck_cpu_init_timer();
+ __mcheck_cpu_setup_timer();
}
/*
@@ -2138,6 +2193,7 @@ int __init mcheck_init(void)
{
mcheck_intel_therm_init();
mce_register_decode_chain(&mce_srao_nb);
+ mce_register_decode_chain(&mce_default_nb);
mcheck_vendor_init_severity();
INIT_WORK(&mce_work, mce_process_work);
@@ -2255,8 +2311,6 @@ static struct bus_type mce_subsys = {
DEFINE_PER_CPU(struct device *, mce_device);
-void (*threshold_cpu_callback)(unsigned long action, unsigned int cpu);
-
static inline struct mce_bank *attr_to_bank(struct device_attribute *attr)
{
return container_of(attr, struct mce_bank, attr);
@@ -2409,6 +2463,10 @@ static int mce_device_create(unsigned int cpu)
if (!mce_available(&boot_cpu_data))
return -EIO;
+ dev = per_cpu(mce_device, cpu);
+ if (dev)
+ return 0;
+
dev = kzalloc(sizeof *dev, GFP_KERNEL);
if (!dev)
return -ENOMEM;
@@ -2468,28 +2526,25 @@ static void mce_device_remove(unsigned int cpu)
}
/* Make sure there are no machine checks on offlined CPUs. */
-static void mce_disable_cpu(void *h)
+static void mce_disable_cpu(void)
{
- unsigned long action = *(unsigned long *)h;
-
if (!mce_available(raw_cpu_ptr(&cpu_info)))
return;
- if (!(action & CPU_TASKS_FROZEN))
+ if (!cpuhp_tasks_frozen)
cmci_clear();
vendor_disable_error_reporting();
}
-static void mce_reenable_cpu(void *h)
+static void mce_reenable_cpu(void)
{
- unsigned long action = *(unsigned long *)h;
int i;
if (!mce_available(raw_cpu_ptr(&cpu_info)))
return;
- if (!(action & CPU_TASKS_FROZEN))
+ if (!cpuhp_tasks_frozen)
cmci_reenable();
for (i = 0; i < mca_cfg.banks; i++) {
struct mce_bank *b = &mce_banks[i];
@@ -2499,45 +2554,43 @@ static void mce_reenable_cpu(void *h)
}
}
-/* Get notified when a cpu comes on/off. Be hotplug friendly. */
-static int
-mce_cpu_callback(struct notifier_block *nfb, unsigned long action, void *hcpu)
+static int mce_cpu_dead(unsigned int cpu)
+{
+ mce_intel_hcpu_update(cpu);
+
+ /* intentionally ignoring frozen here */
+ if (!cpuhp_tasks_frozen)
+ cmci_rediscover();
+ return 0;
+}
+
+static int mce_cpu_online(unsigned int cpu)
{
- unsigned int cpu = (unsigned long)hcpu;
struct timer_list *t = &per_cpu(mce_timer, cpu);
+ int ret;
- switch (action & ~CPU_TASKS_FROZEN) {
- case CPU_ONLINE:
- mce_device_create(cpu);
- if (threshold_cpu_callback)
- threshold_cpu_callback(action, cpu);
- break;
- case CPU_DEAD:
- if (threshold_cpu_callback)
- threshold_cpu_callback(action, cpu);
- mce_device_remove(cpu);
- mce_intel_hcpu_update(cpu);
+ mce_device_create(cpu);
- /* intentionally ignoring frozen here */
- if (!(action & CPU_TASKS_FROZEN))
- cmci_rediscover();
- break;
- case CPU_DOWN_PREPARE:
- smp_call_function_single(cpu, mce_disable_cpu, &action, 1);
- del_timer_sync(t);
- break;
- case CPU_DOWN_FAILED:
- smp_call_function_single(cpu, mce_reenable_cpu, &action, 1);
- mce_start_timer(cpu, t);
- break;
+ ret = mce_threshold_create_device(cpu);
+ if (ret) {
+ mce_device_remove(cpu);
+ return ret;
}
-
- return NOTIFY_OK;
+ mce_reenable_cpu();
+ mce_start_timer(cpu, t);
+ return 0;
}
-static struct notifier_block mce_cpu_notifier = {
- .notifier_call = mce_cpu_callback,
-};
+static int mce_cpu_pre_down(unsigned int cpu)
+{
+ struct timer_list *t = &per_cpu(mce_timer, cpu);
+
+ mce_disable_cpu();
+ del_timer_sync(t);
+ mce_threshold_remove_device(cpu);
+ mce_device_remove(cpu);
+ return 0;
+}
static __init void mce_init_banks(void)
{
@@ -2559,8 +2612,8 @@ static __init void mce_init_banks(void)
static __init int mcheck_init_device(void)
{
+ enum cpuhp_state hp_online;
int err;
- int i = 0;
if (!mce_available(&boot_cpu_data)) {
err = -EIO;
@@ -2578,23 +2631,16 @@ static __init int mcheck_init_device(void)
if (err)
goto err_out_mem;
- cpu_notifier_register_begin();
- for_each_online_cpu(i) {
- err = mce_device_create(i);
- if (err) {
- /*
- * Register notifier anyway (and do not unreg it) so
- * that we don't leave undeleted timers, see notifier
- * callback above.
- */
- __register_hotcpu_notifier(&mce_cpu_notifier);
- cpu_notifier_register_done();
- goto err_device_create;
- }
- }
+ err = cpuhp_setup_state(CPUHP_X86_MCE_DEAD, "x86/mce:dead", NULL,
+ mce_cpu_dead);
+ if (err)
+ goto err_out_mem;
- __register_hotcpu_notifier(&mce_cpu_notifier);
- cpu_notifier_register_done();
+ err = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "x86/mce:online",
+ mce_cpu_online, mce_cpu_pre_down);
+ if (err < 0)
+ goto err_out_online;
+ hp_online = err;
register_syscore_ops(&mce_syscore_ops);
@@ -2607,16 +2653,10 @@ static __init int mcheck_init_device(void)
err_register:
unregister_syscore_ops(&mce_syscore_ops);
+ cpuhp_remove_state(hp_online);
-err_device_create:
- /*
- * We didn't keep track of which devices were created above, but
- * even if we had, the set of online cpus might have changed.
- * Play safe and remove for every possible cpu, since
- * mce_device_remove() will do the right thing.
- */
- for_each_possible_cpu(i)
- mce_device_remove(i);
+err_out_online:
+ cpuhp_remove_state(CPUHP_X86_MCE_DEAD);
err_out_mem:
free_cpumask_var(mce_device_initialized);
diff --git a/arch/x86/kernel/cpu/mcheck/mce_amd.c b/arch/x86/kernel/cpu/mcheck/mce_amd.c
index 9b5403462936..ffacfdcacb85 100644
--- a/arch/x86/kernel/cpu/mcheck/mce_amd.c
+++ b/arch/x86/kernel/cpu/mcheck/mce_amd.c
@@ -24,7 +24,6 @@
#include <asm/amd_nb.h>
#include <asm/apic.h>
-#include <asm/idle.h>
#include <asm/mce.h>
#include <asm/msr.h>
#include <asm/trace/irq_vectors.h>
@@ -55,6 +54,8 @@
/* Threshold LVT offset is at MSR0xC0000410[15:12] */
#define SMCA_THR_LVT_OFF 0xF000
+static bool thresholding_en;
+
static const char * const th_names[] = {
"load_store",
"insn_fetch",
@@ -69,7 +70,12 @@ static const char * const smca_umc_block_names[] = {
"misc_umc"
};
-struct smca_bank_name smca_bank_names[] = {
+struct smca_bank_name {
+ const char *name; /* Short name for sysfs */
+ const char *long_name; /* Long name for pretty-printing */
+};
+
+static struct smca_bank_name smca_names[] = {
[SMCA_LS] = { "load_store", "Load Store Unit" },
[SMCA_IF] = { "insn_fetch", "Instruction Fetch Unit" },
[SMCA_L2_CACHE] = { "l2_cache", "L2 Cache" },
@@ -84,9 +90,25 @@ struct smca_bank_name smca_bank_names[] = {
[SMCA_PSP] = { "psp", "Platform Security Processor" },
[SMCA_SMU] = { "smu", "System Management Unit" },
};
-EXPORT_SYMBOL_GPL(smca_bank_names);
-static struct smca_hwid_mcatype smca_hwid_mcatypes[] = {
+const char *smca_get_name(enum smca_bank_types t)
+{
+ if (t >= N_SMCA_BANK_TYPES)
+ return NULL;
+
+ return smca_names[t].name;
+}
+
+const char *smca_get_long_name(enum smca_bank_types t)
+{
+ if (t >= N_SMCA_BANK_TYPES)
+ return NULL;
+
+ return smca_names[t].long_name;
+}
+EXPORT_SYMBOL_GPL(smca_get_long_name);
+
+static struct smca_hwid smca_hwid_mcatypes[] = {
/* { bank_type, hwid_mcatype, xec_bitmap } */
/* ZN Core (HWID=0xB0) MCA types */
@@ -116,7 +138,7 @@ static struct smca_hwid_mcatype smca_hwid_mcatypes[] = {
{ SMCA_SMU, HWID_MCATYPE(0x01, 0x0), 0x1 },
};
-struct smca_bank_info smca_banks[MAX_NR_BANKS];
+struct smca_bank smca_banks[MAX_NR_BANKS];
EXPORT_SYMBOL_GPL(smca_banks);
/*
@@ -142,35 +164,34 @@ static void default_deferred_error_interrupt(void)
}
void (*deferred_error_int_vector)(void) = default_deferred_error_interrupt;
-/*
- * CPU Initialization
- */
-
static void get_smca_bank_info(unsigned int bank)
{
unsigned int i, hwid_mcatype, cpu = smp_processor_id();
- struct smca_hwid_mcatype *type;
- u32 high, instanceId;
- u16 hwid, mcatype;
+ struct smca_hwid *s_hwid;
+ u32 high, instance_id;
/* Collect bank_info using CPU 0 for now. */
if (cpu)
return;
- if (rdmsr_safe_on_cpu(cpu, MSR_AMD64_SMCA_MCx_IPID(bank), &instanceId, &high)) {
+ if (rdmsr_safe_on_cpu(cpu, MSR_AMD64_SMCA_MCx_IPID(bank), &instance_id, &high)) {
pr_warn("Failed to read MCA_IPID for bank %d\n", bank);
return;
}
- hwid = high & MCI_IPID_HWID;
- mcatype = (high & MCI_IPID_MCATYPE) >> 16;
- hwid_mcatype = HWID_MCATYPE(hwid, mcatype);
+ hwid_mcatype = HWID_MCATYPE(high & MCI_IPID_HWID,
+ (high & MCI_IPID_MCATYPE) >> 16);
for (i = 0; i < ARRAY_SIZE(smca_hwid_mcatypes); i++) {
- type = &smca_hwid_mcatypes[i];
- if (hwid_mcatype == type->hwid_mcatype) {
- smca_banks[bank].type = type;
- smca_banks[bank].type_instance = instanceId;
+ s_hwid = &smca_hwid_mcatypes[i];
+ if (hwid_mcatype == s_hwid->hwid_mcatype) {
+
+ WARN(smca_banks[bank].hwid,
+ "Bank %s already initialized!\n",
+ smca_get_name(s_hwid->bank_type));
+
+ smca_banks[bank].hwid = s_hwid;
+ smca_banks[bank].id = instance_id;
break;
}
}
@@ -533,6 +554,206 @@ void mce_amd_feature_init(struct cpuinfo_x86 *c)
deferred_error_interrupt_enable(c);
}
+int umc_normaddr_to_sysaddr(u64 norm_addr, u16 nid, u8 umc, u64 *sys_addr)
+{
+ u64 dram_base_addr, dram_limit_addr, dram_hole_base;
+ /* We start from the normalized address */
+ u64 ret_addr = norm_addr;
+
+ u32 tmp;
+
+ u8 die_id_shift, die_id_mask, socket_id_shift, socket_id_mask;
+ u8 intlv_num_dies, intlv_num_chan, intlv_num_sockets;
+ u8 intlv_addr_sel, intlv_addr_bit;
+ u8 num_intlv_bits, hashed_bit;
+ u8 lgcy_mmio_hole_en, base = 0;
+ u8 cs_mask, cs_id = 0;
+ bool hash_enabled = false;
+
+ /* Read D18F0x1B4 (DramOffset), check if base 1 is used. */
+ if (amd_df_indirect_read(nid, 0, 0x1B4, umc, &tmp))
+ goto out_err;
+
+ /* Remove HiAddrOffset from normalized address, if enabled: */
+ if (tmp & BIT(0)) {
+ u64 hi_addr_offset = (tmp & GENMASK_ULL(31, 20)) << 8;
+
+ if (norm_addr >= hi_addr_offset) {
+ ret_addr -= hi_addr_offset;
+ base = 1;
+ }
+ }
+
+ /* Read D18F0x110 (DramBaseAddress). */
+ if (amd_df_indirect_read(nid, 0, 0x110 + (8 * base), umc, &tmp))
+ goto out_err;
+
+ /* Check if address range is valid. */
+ if (!(tmp & BIT(0))) {
+ pr_err("%s: Invalid DramBaseAddress range: 0x%x.\n",
+ __func__, tmp);
+ goto out_err;
+ }
+
+ lgcy_mmio_hole_en = tmp & BIT(1);
+ intlv_num_chan = (tmp >> 4) & 0xF;
+ intlv_addr_sel = (tmp >> 8) & 0x7;
+ dram_base_addr = (tmp & GENMASK_ULL(31, 12)) << 16;
+
+ /* {0, 1, 2, 3} map to address bits {8, 9, 10, 11} respectively */
+ if (intlv_addr_sel > 3) {
+ pr_err("%s: Invalid interleave address select %d.\n",
+ __func__, intlv_addr_sel);
+ goto out_err;
+ }
+
+ /* Read D18F0x114 (DramLimitAddress). */
+ if (amd_df_indirect_read(nid, 0, 0x114 + (8 * base), umc, &tmp))
+ goto out_err;
+
+ intlv_num_sockets = (tmp >> 8) & 0x1;
+ intlv_num_dies = (tmp >> 10) & 0x3;
+ dram_limit_addr = ((tmp & GENMASK_ULL(31, 12)) << 16) | GENMASK_ULL(27, 0);
+
+ intlv_addr_bit = intlv_addr_sel + 8;
+
+ /* Re-use intlv_num_chan by setting it equal to log2(#channels) */
+ switch (intlv_num_chan) {
+ case 0: intlv_num_chan = 0; break;
+ case 1: intlv_num_chan = 1; break;
+ case 3: intlv_num_chan = 2; break;
+ case 5: intlv_num_chan = 3; break;
+ case 7: intlv_num_chan = 4; break;
+
+ case 8: intlv_num_chan = 1;
+ hash_enabled = true;
+ break;
+ default:
+ pr_err("%s: Invalid number of interleaved channels %d.\n",
+ __func__, intlv_num_chan);
+ goto out_err;
+ }
+
+ num_intlv_bits = intlv_num_chan;
+
+ if (intlv_num_dies > 2) {
+ pr_err("%s: Invalid number of interleaved nodes/dies %d.\n",
+ __func__, intlv_num_dies);
+ goto out_err;
+ }
+
+ num_intlv_bits += intlv_num_dies;
+
+ /* Add a bit if sockets are interleaved. */
+ num_intlv_bits += intlv_num_sockets;
+
+ /* Assert num_intlv_bits <= 4 */
+ if (num_intlv_bits > 4) {
+ pr_err("%s: Invalid interleave bits %d.\n",
+ __func__, num_intlv_bits);
+ goto out_err;
+ }
+
+ if (num_intlv_bits > 0) {
+ u64 temp_addr_x, temp_addr_i, temp_addr_y;
+ u8 die_id_bit, sock_id_bit, cs_fabric_id;
+
+ /*
+ * Read FabricBlockInstanceInformation3_CS[BlockFabricID].
+ * This is the fabric id for this coherent slave. Use
+ * umc/channel# as instance id of the coherent slave
+ * for FICAA.
+ */
+ if (amd_df_indirect_read(nid, 0, 0x50, umc, &tmp))
+ goto out_err;
+
+ cs_fabric_id = (tmp >> 8) & 0xFF;
+ die_id_bit = 0;
+
+ /* If interleaved over more than 1 channel: */
+ if (intlv_num_chan) {
+ die_id_bit = intlv_num_chan;
+ cs_mask = (1 << die_id_bit) - 1;
+ cs_id = cs_fabric_id & cs_mask;
+ }
+
+ sock_id_bit = die_id_bit;
+
+ /* Read D18F1x208 (SystemFabricIdMask). */
+ if (intlv_num_dies || intlv_num_sockets)
+ if (amd_df_indirect_read(nid, 1, 0x208, umc, &tmp))
+ goto out_err;
+
+ /* If interleaved over more than 1 die. */
+ if (intlv_num_dies) {
+ sock_id_bit = die_id_bit + intlv_num_dies;
+ die_id_shift = (tmp >> 24) & 0xF;
+ die_id_mask = (tmp >> 8) & 0xFF;
+
+ cs_id |= ((cs_fabric_id & die_id_mask) >> die_id_shift) << die_id_bit;
+ }
+
+ /* If interleaved over more than 1 socket. */
+ if (intlv_num_sockets) {
+ socket_id_shift = (tmp >> 28) & 0xF;
+ socket_id_mask = (tmp >> 16) & 0xFF;
+
+ cs_id |= ((cs_fabric_id & socket_id_mask) >> socket_id_shift) << sock_id_bit;
+ }
+
+ /*
+ * The pre-interleaved address consists of XXXXXXIIIYYYYY
+ * where III is the ID for this CS, and XXXXXXYYYYY are the
+ * address bits from the post-interleaved address.
+ * "num_intlv_bits" has been calculated to tell us how many "I"
+ * bits there are. "intlv_addr_bit" tells us how many "Y" bits
+ * there are (where "I" starts).
+ */
+ temp_addr_y = ret_addr & GENMASK_ULL(intlv_addr_bit-1, 0);
+ temp_addr_i = (cs_id << intlv_addr_bit);
+ temp_addr_x = (ret_addr & GENMASK_ULL(63, intlv_addr_bit)) << num_intlv_bits;
+ ret_addr = temp_addr_x | temp_addr_i | temp_addr_y;
+ }
+
+ /* Add dram base address */
+ ret_addr += dram_base_addr;
+
+ /* If legacy MMIO hole enabled */
+ if (lgcy_mmio_hole_en) {
+ if (amd_df_indirect_read(nid, 0, 0x104, umc, &tmp))
+ goto out_err;
+
+ dram_hole_base = tmp & GENMASK(31, 24);
+ if (ret_addr >= dram_hole_base)
+ ret_addr += (BIT_ULL(32) - dram_hole_base);
+ }
+
+ if (hash_enabled) {
+ /* Save some parentheses and grab ls-bit at the end. */
+ hashed_bit = (ret_addr >> 12) ^
+ (ret_addr >> 18) ^
+ (ret_addr >> 21) ^
+ (ret_addr >> 30) ^
+ cs_id;
+
+ hashed_bit &= BIT(0);
+
+ if (hashed_bit != ((ret_addr >> intlv_addr_bit) & BIT(0)))
+ ret_addr ^= BIT(intlv_addr_bit);
+ }
+
+ /* Is calculated system address is above DRAM limit address? */
+ if (ret_addr > dram_limit_addr)
+ goto out_err;
+
+ *sys_addr = ret_addr;
+ return 0;
+
+out_err:
+ return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(umc_normaddr_to_sysaddr);
+
static void
__log_error(unsigned int bank, bool deferred_err, bool threshold_err, u64 misc)
{
@@ -645,6 +866,7 @@ static void amd_threshold_interrupt(void)
{
u32 low = 0, high = 0, address = 0;
unsigned int bank, block, cpu = smp_processor_id();
+ struct thresh_restart tr;
/* assume first bank caused it */
for (bank = 0; bank < mca_cfg.banks; ++bank) {
@@ -681,6 +903,11 @@ static void amd_threshold_interrupt(void)
log:
__log_error(bank, false, true, ((u64)high << 32) | low);
+
+ /* Reset threshold block after logging error. */
+ memset(&tr, 0, sizeof(tr));
+ tr.b = &per_cpu(threshold_banks, cpu)[bank]->blocks[block];
+ threshold_restart_bank(&tr);
}
/*
@@ -826,10 +1053,10 @@ static const char *get_name(unsigned int bank, struct threshold_block *b)
return th_names[bank];
}
- if (!smca_banks[bank].type)
+ if (!smca_banks[bank].hwid)
return NULL;
- bank_type = smca_banks[bank].type->bank_type;
+ bank_type = smca_banks[bank].hwid->bank_type;
if (b && bank_type == SMCA_UMC) {
if (b->block < ARRAY_SIZE(smca_umc_block_names))
@@ -838,8 +1065,8 @@ static const char *get_name(unsigned int bank, struct threshold_block *b)
}
snprintf(buf_mcatype, MAX_MCATYPE_NAME_LEN,
- "%s_%x", smca_bank_names[bank_type].name,
- smca_banks[bank].type_instance);
+ "%s_%x", smca_get_name(bank_type),
+ smca_banks[bank].id);
return buf_mcatype;
}
@@ -1010,31 +1237,6 @@ static int threshold_create_bank(unsigned int cpu, unsigned int bank)
return err;
}
-/* create dir/files for all valid threshold banks */
-static int threshold_create_device(unsigned int cpu)
-{
- unsigned int bank;
- struct threshold_bank **bp;
- int err = 0;
-
- bp = kzalloc(sizeof(struct threshold_bank *) * mca_cfg.banks,
- GFP_KERNEL);
- if (!bp)
- return -ENOMEM;
-
- per_cpu(threshold_banks, cpu) = bp;
-
- for (bank = 0; bank < mca_cfg.banks; ++bank) {
- if (!(per_cpu(bank_map, cpu) & (1 << bank)))
- continue;
- err = threshold_create_bank(cpu, bank);
- if (err)
- return err;
- }
-
- return err;
-}
-
static void deallocate_threshold_block(unsigned int cpu,
unsigned int bank)
{
@@ -1102,48 +1304,71 @@ free_out:
per_cpu(threshold_banks, cpu)[bank] = NULL;
}
-static void threshold_remove_device(unsigned int cpu)
+int mce_threshold_remove_device(unsigned int cpu)
{
unsigned int bank;
+ if (!thresholding_en)
+ return 0;
+
for (bank = 0; bank < mca_cfg.banks; ++bank) {
if (!(per_cpu(bank_map, cpu) & (1 << bank)))
continue;
threshold_remove_bank(cpu, bank);
}
kfree(per_cpu(threshold_banks, cpu));
+ per_cpu(threshold_banks, cpu) = NULL;
+ return 0;
}
-/* get notified when a cpu comes on/off */
-static void
-amd_64_threshold_cpu_callback(unsigned long action, unsigned int cpu)
+/* create dir/files for all valid threshold banks */
+int mce_threshold_create_device(unsigned int cpu)
{
- switch (action) {
- case CPU_ONLINE:
- case CPU_ONLINE_FROZEN:
- threshold_create_device(cpu);
- break;
- case CPU_DEAD:
- case CPU_DEAD_FROZEN:
- threshold_remove_device(cpu);
- break;
- default:
- break;
+ unsigned int bank;
+ struct threshold_bank **bp;
+ int err = 0;
+
+ if (!thresholding_en)
+ return 0;
+
+ bp = per_cpu(threshold_banks, cpu);
+ if (bp)
+ return 0;
+
+ bp = kzalloc(sizeof(struct threshold_bank *) * mca_cfg.banks,
+ GFP_KERNEL);
+ if (!bp)
+ return -ENOMEM;
+
+ per_cpu(threshold_banks, cpu) = bp;
+
+ for (bank = 0; bank < mca_cfg.banks; ++bank) {
+ if (!(per_cpu(bank_map, cpu) & (1 << bank)))
+ continue;
+ err = threshold_create_bank(cpu, bank);
+ if (err)
+ goto err;
}
+ return err;
+err:
+ mce_threshold_remove_device(cpu);
+ return err;
}
static __init int threshold_init_device(void)
{
unsigned lcpu = 0;
+ if (mce_threshold_vector == amd_threshold_interrupt)
+ thresholding_en = true;
+
/* to hit CPUs online before the notifier is up */
for_each_online_cpu(lcpu) {
- int err = threshold_create_device(lcpu);
+ int err = mce_threshold_create_device(lcpu);
if (err)
return err;
}
- threshold_cpu_callback = amd_64_threshold_cpu_callback;
return 0;
}
diff --git a/arch/x86/kernel/cpu/mcheck/mce_intel.c b/arch/x86/kernel/cpu/mcheck/mce_intel.c
index 1defb8ea882c..190b3e6cef4d 100644
--- a/arch/x86/kernel/cpu/mcheck/mce_intel.c
+++ b/arch/x86/kernel/cpu/mcheck/mce_intel.c
@@ -11,6 +11,8 @@
#include <linux/sched.h>
#include <linux/cpumask.h>
#include <asm/apic.h>
+#include <asm/cpufeature.h>
+#include <asm/intel-family.h>
#include <asm/processor.h>
#include <asm/msr.h>
#include <asm/mce.h>
@@ -130,7 +132,7 @@ bool mce_intel_cmci_poll(void)
* Reset the counter if we've logged an error in the last poll
* during the storm.
*/
- if (machine_check_poll(MCP_TIMESTAMP, this_cpu_ptr(&mce_banks_owned)))
+ if (machine_check_poll(0, this_cpu_ptr(&mce_banks_owned)))
this_cpu_write(cmci_backoff_cnt, INITIAL_CHECK_INTERVAL);
else
this_cpu_dec(cmci_backoff_cnt);
@@ -342,7 +344,7 @@ void cmci_recheck(void)
return;
local_irq_save(flags);
- machine_check_poll(MCP_TIMESTAMP, this_cpu_ptr(&mce_banks_owned));
+ machine_check_poll(0, this_cpu_ptr(&mce_banks_owned));
local_irq_restore(flags);
}
@@ -464,11 +466,46 @@ static void intel_clear_lmce(void)
wrmsrl(MSR_IA32_MCG_EXT_CTL, val);
}
+static void intel_ppin_init(struct cpuinfo_x86 *c)
+{
+ unsigned long long val;
+
+ /*
+ * Even if testing the presence of the MSR would be enough, we don't
+ * want to risk the situation where other models reuse this MSR for
+ * other purposes.
+ */
+ switch (c->x86_model) {
+ case INTEL_FAM6_IVYBRIDGE_X:
+ case INTEL_FAM6_HASWELL_X:
+ case INTEL_FAM6_BROADWELL_XEON_D:
+ case INTEL_FAM6_BROADWELL_X:
+ case INTEL_FAM6_SKYLAKE_X:
+ if (rdmsrl_safe(MSR_PPIN_CTL, &val))
+ return;
+
+ if ((val & 3UL) == 1UL) {
+ /* PPIN available but disabled: */
+ return;
+ }
+
+ /* If PPIN is disabled, but not locked, try to enable: */
+ if (!(val & 3UL)) {
+ wrmsrl_safe(MSR_PPIN_CTL, val | 2UL);
+ rdmsrl_safe(MSR_PPIN_CTL, &val);
+ }
+
+ if ((val & 3UL) == 2UL)
+ set_cpu_cap(c, X86_FEATURE_INTEL_PPIN);
+ }
+}
+
void mce_intel_feature_init(struct cpuinfo_x86 *c)
{
intel_init_thermal(c);
intel_init_cmci();
intel_init_lmce();
+ intel_ppin_init(c);
}
void mce_intel_feature_clear(struct cpuinfo_x86 *c)
diff --git a/arch/x86/kernel/cpu/mcheck/therm_throt.c b/arch/x86/kernel/cpu/mcheck/therm_throt.c
index 6b9dc4d18ccc..465aca8be009 100644
--- a/arch/x86/kernel/cpu/mcheck/therm_throt.c
+++ b/arch/x86/kernel/cpu/mcheck/therm_throt.c
@@ -26,7 +26,6 @@
#include <asm/processor.h>
#include <asm/apic.h>
-#include <asm/idle.h>
#include <asm/mce.h>
#include <asm/msr.h>
#include <asm/trace/irq_vectors.h>
@@ -271,58 +270,32 @@ static void thermal_throttle_remove_dev(struct device *dev)
}
/* Get notified when a cpu comes on/off. Be hotplug friendly. */
-static int
-thermal_throttle_cpu_callback(struct notifier_block *nfb,
- unsigned long action,
- void *hcpu)
+static int thermal_throttle_online(unsigned int cpu)
{
- unsigned int cpu = (unsigned long)hcpu;
- struct device *dev;
- int err = 0;
-
- dev = get_cpu_device(cpu);
-
- switch (action) {
- case CPU_UP_PREPARE:
- case CPU_UP_PREPARE_FROZEN:
- err = thermal_throttle_add_dev(dev, cpu);
- WARN_ON(err);
- break;
- case CPU_UP_CANCELED:
- case CPU_UP_CANCELED_FROZEN:
- case CPU_DEAD:
- case CPU_DEAD_FROZEN:
- thermal_throttle_remove_dev(dev);
- break;
- }
- return notifier_from_errno(err);
+ struct device *dev = get_cpu_device(cpu);
+
+ return thermal_throttle_add_dev(dev, cpu);
}
-static struct notifier_block thermal_throttle_cpu_notifier =
+static int thermal_throttle_offline(unsigned int cpu)
{
- .notifier_call = thermal_throttle_cpu_callback,
-};
+ struct device *dev = get_cpu_device(cpu);
+
+ thermal_throttle_remove_dev(dev);
+ return 0;
+}
static __init int thermal_throttle_init_device(void)
{
- unsigned int cpu = 0;
- int err;
+ int ret;
if (!atomic_read(&therm_throt_en))
return 0;
- cpu_notifier_register_begin();
-
- /* connect live CPUs to sysfs */
- for_each_online_cpu(cpu) {
- err = thermal_throttle_add_dev(get_cpu_device(cpu), cpu);
- WARN_ON(err);
- }
-
- __register_hotcpu_notifier(&thermal_throttle_cpu_notifier);
- cpu_notifier_register_done();
-
- return 0;
+ ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "x86/therm:online",
+ thermal_throttle_online,
+ thermal_throttle_offline);
+ return ret < 0 ? ret : 0;
}
device_initcall(thermal_throttle_init_device);
diff --git a/arch/x86/kernel/cpu/mcheck/threshold.c b/arch/x86/kernel/cpu/mcheck/threshold.c
index fcf9ae9384f4..9beb092d68a5 100644
--- a/arch/x86/kernel/cpu/mcheck/threshold.c
+++ b/arch/x86/kernel/cpu/mcheck/threshold.c
@@ -6,7 +6,6 @@
#include <asm/irq_vectors.h>
#include <asm/apic.h>
-#include <asm/idle.h>
#include <asm/mce.h>
#include <asm/trace/irq_vectors.h>
diff --git a/arch/x86/kernel/cpu/microcode/Makefile b/arch/x86/kernel/cpu/microcode/Makefile
index 220b1a508513..ba12e8aa4a45 100644
--- a/arch/x86/kernel/cpu/microcode/Makefile
+++ b/arch/x86/kernel/cpu/microcode/Makefile
@@ -1,4 +1,4 @@
microcode-y := core.o
obj-$(CONFIG_MICROCODE) += microcode.o
-microcode-$(CONFIG_MICROCODE_INTEL) += intel.o intel_lib.o
+microcode-$(CONFIG_MICROCODE_INTEL) += intel.o
microcode-$(CONFIG_MICROCODE_AMD) += amd.o
diff --git a/arch/x86/kernel/cpu/microcode/amd.c b/arch/x86/kernel/cpu/microcode/amd.c
index 017bda12caae..6f353bdb3a25 100644
--- a/arch/x86/kernel/cpu/microcode/amd.c
+++ b/arch/x86/kernel/cpu/microcode/amd.c
@@ -5,6 +5,7 @@
* CPUs and later.
*
* Copyright (C) 2008-2011 Advanced Micro Devices Inc.
+ * 2013-2016 Borislav Petkov <bp@alien8.de>
*
* Author: Peter Oruba <peter.oruba@amd.com>
*
@@ -39,64 +40,25 @@
static struct equiv_cpu_entry *equiv_cpu_table;
-struct ucode_patch {
- struct list_head plist;
- void *data;
- u32 patch_id;
- u16 equiv_cpu;
-};
-
-static LIST_HEAD(pcache);
-
/*
* This points to the current valid container of microcode patches which we will
- * save from the initrd before jettisoning its contents.
+ * save from the initrd/builtin before jettisoning its contents.
*/
-static u8 *container;
-static size_t container_size;
-static bool ucode_builtin;
+struct container {
+ u8 *data;
+ size_t size;
+} cont;
static u32 ucode_new_rev;
static u8 amd_ucode_patch[PATCH_MAX_SIZE];
static u16 this_equiv_id;
-static struct cpio_data ucode_cpio;
-
-static struct cpio_data __init find_ucode_in_initrd(void)
-{
-#ifdef CONFIG_BLK_DEV_INITRD
- char *path;
- void *start;
- size_t size;
-
- /*
- * Microcode patch container file is prepended to the initrd in cpio
- * format. See Documentation/x86/early-microcode.txt
- */
- static __initdata char ucode_path[] = "kernel/x86/microcode/AuthenticAMD.bin";
-
-#ifdef CONFIG_X86_32
- struct boot_params *p;
-
- /*
- * On 32-bit, early load occurs before paging is turned on so we need
- * to use physical addresses.
- */
- p = (struct boot_params *)__pa_nodebug(&boot_params);
- path = (char *)__pa_nodebug(ucode_path);
- start = (void *)p->hdr.ramdisk_image;
- size = p->hdr.ramdisk_size;
-#else
- path = ucode_path;
- start = (void *)(boot_params.hdr.ramdisk_image + PAGE_OFFSET);
- size = boot_params.hdr.ramdisk_size;
-#endif /* !CONFIG_X86_32 */
-
- return find_cpio_data(path, start, size, NULL);
-#else
- return (struct cpio_data){ NULL, 0, "" };
-#endif
-}
+/*
+ * Microcode patch container file is prepended to the initrd in cpio
+ * format. See Documentation/x86/early-microcode.txt
+ */
+static const char
+ucode_path[] __maybe_unused = "kernel/x86/microcode/AuthenticAMD.bin";
static size_t compute_container_size(u8 *data, u32 total_size)
{
@@ -135,48 +97,48 @@ static size_t compute_container_size(u8 *data, u32 total_size)
return size;
}
+static inline u16 find_equiv_id(struct equiv_cpu_entry *equiv_cpu_table,
+ unsigned int sig)
+{
+ int i = 0;
+
+ if (!equiv_cpu_table)
+ return 0;
+
+ while (equiv_cpu_table[i].installed_cpu != 0) {
+ if (sig == equiv_cpu_table[i].installed_cpu)
+ return equiv_cpu_table[i].equiv_cpu;
+
+ i++;
+ }
+ return 0;
+}
+
/*
- * Early load occurs before we can vmalloc(). So we look for the microcode
- * patch container file in initrd, traverse equivalent cpu table, look for a
- * matching microcode patch, and update, all in initrd memory in place.
- * When vmalloc() is available for use later -- on 64-bit during first AP load,
- * and on 32-bit during save_microcode_in_initrd_amd() -- we can call
- * load_microcode_amd() to save equivalent cpu table and microcode patches in
- * kernel heap memory.
+ * This scans the ucode blob for the proper container as we can have multiple
+ * containers glued together.
*/
-static void apply_ucode_in_initrd(void *ucode, size_t size, bool save_patch)
+static struct container
+find_proper_container(u8 *ucode, size_t size, u16 *ret_id)
{
+ struct container ret = { NULL, 0 };
+ u32 eax, ebx, ecx, edx;
struct equiv_cpu_entry *eq;
- size_t *cont_sz;
- u32 *header;
- u8 *data, **cont;
- u8 (*patch)[PATCH_MAX_SIZE];
- u16 eq_id = 0;
int offset, left;
- u32 rev, eax, ebx, ecx, edx;
- u32 *new_rev;
-
-#ifdef CONFIG_X86_32
- new_rev = (u32 *)__pa_nodebug(&ucode_new_rev);
- cont_sz = (size_t *)__pa_nodebug(&container_size);
- cont = (u8 **)__pa_nodebug(&container);
- patch = (u8 (*)[PATCH_MAX_SIZE])__pa_nodebug(&amd_ucode_patch);
-#else
- new_rev = &ucode_new_rev;
- cont_sz = &container_size;
- cont = &container;
- patch = &amd_ucode_patch;
-#endif
+ u16 eq_id = 0;
+ u32 *header;
+ u8 *data;
data = ucode;
left = size;
header = (u32 *)data;
+
/* find equiv cpu table */
if (header[0] != UCODE_MAGIC ||
header[1] != UCODE_EQUIV_CPU_TABLE_TYPE || /* type */
header[2] == 0) /* size */
- return;
+ return ret;
eax = 0x00000001;
ecx = 0;
@@ -185,7 +147,7 @@ static void apply_ucode_in_initrd(void *ucode, size_t size, bool save_patch)
while (left > 0) {
eq = (struct equiv_cpu_entry *)(data + CONTAINER_HDR_SZ);
- *cont = data;
+ ret.data = data;
/* Advance past the container header */
offset = header[2] + CONTAINER_HDR_SZ;
@@ -194,15 +156,15 @@ static void apply_ucode_in_initrd(void *ucode, size_t size, bool save_patch)
eq_id = find_equiv_id(eq, eax);
if (eq_id) {
- this_equiv_id = eq_id;
- *cont_sz = compute_container_size(*cont, left + offset);
+ ret.size = compute_container_size(ret.data, left + offset);
/*
* truncate how much we need to iterate over in the
* ucode update loop below
*/
- left = *cont_sz - offset;
- break;
+ left = ret.size - offset;
+ *ret_id = eq_id;
+ return ret;
}
/*
@@ -212,6 +174,7 @@ static void apply_ucode_in_initrd(void *ucode, size_t size, bool save_patch)
*/
while (left > 0) {
header = (u32 *)data;
+
if (header[0] == UCODE_MAGIC &&
header[1] == UCODE_EQUIV_CPU_TABLE_TYPE)
break;
@@ -226,14 +189,64 @@ static void apply_ucode_in_initrd(void *ucode, size_t size, bool save_patch)
ucode = data;
}
- if (!eq_id) {
- *cont = NULL;
- *cont_sz = 0;
- return;
- }
+ return ret;
+}
+
+static int __apply_microcode_amd(struct microcode_amd *mc_amd)
+{
+ u32 rev, dummy;
+
+ native_wrmsrl(MSR_AMD64_PATCH_LOADER, (u64)(long)&mc_amd->hdr.data_code);
+
+ /* verify patch application was successful */
+ native_rdmsr(MSR_AMD64_PATCH_LEVEL, rev, dummy);
+ if (rev != mc_amd->hdr.patch_id)
+ return -1;
+
+ return 0;
+}
+
+/*
+ * Early load occurs before we can vmalloc(). So we look for the microcode
+ * patch container file in initrd, traverse equivalent cpu table, look for a
+ * matching microcode patch, and update, all in initrd memory in place.
+ * When vmalloc() is available for use later -- on 64-bit during first AP load,
+ * and on 32-bit during save_microcode_in_initrd_amd() -- we can call
+ * load_microcode_amd() to save equivalent cpu table and microcode patches in
+ * kernel heap memory.
+ */
+static struct container
+apply_microcode_early_amd(void *ucode, size_t size, bool save_patch)
+{
+ struct container ret = { NULL, 0 };
+ u8 (*patch)[PATCH_MAX_SIZE];
+ int offset, left;
+ u32 rev, *header;
+ u8 *data;
+ u16 eq_id = 0;
+ u32 *new_rev;
+
+#ifdef CONFIG_X86_32
+ new_rev = (u32 *)__pa_nodebug(&ucode_new_rev);
+ patch = (u8 (*)[PATCH_MAX_SIZE])__pa_nodebug(&amd_ucode_patch);
+#else
+ new_rev = &ucode_new_rev;
+ patch = &amd_ucode_patch;
+#endif
if (check_current_patch_level(&rev, true))
- return;
+ return (struct container){ NULL, 0 };
+
+ ret = find_proper_container(ucode, size, &eq_id);
+ if (!eq_id)
+ return (struct container){ NULL, 0 };
+
+ this_equiv_id = eq_id;
+ header = (u32 *)ret.data;
+
+ /* We're pointing to an equiv table, skip over it. */
+ data = ret.data + header[2] + CONTAINER_HDR_SZ;
+ left = ret.size - (header[2] + CONTAINER_HDR_SZ);
while (left > 0) {
struct microcode_amd *mc;
@@ -252,8 +265,7 @@ static void apply_ucode_in_initrd(void *ucode, size_t size, bool save_patch)
*new_rev = rev;
if (save_patch)
- memcpy(patch, mc,
- min_t(u32, header[1], PATCH_MAX_SIZE));
+ memcpy(patch, mc, min_t(u32, header[1], PATCH_MAX_SIZE));
}
}
@@ -261,10 +273,10 @@ static void apply_ucode_in_initrd(void *ucode, size_t size, bool save_patch)
data += offset;
left -= offset;
}
+ return ret;
}
-static bool __init load_builtin_amd_microcode(struct cpio_data *cp,
- unsigned int family)
+static bool get_builtin_microcode(struct cpio_data *cp, unsigned int family)
{
#ifdef CONFIG_X86_64
char fw_name[36] = "amd-ucode/microcode_amd.bin";
@@ -281,47 +293,45 @@ static bool __init load_builtin_amd_microcode(struct cpio_data *cp,
void __init load_ucode_amd_bsp(unsigned int family)
{
+ struct ucode_cpu_info *uci;
struct cpio_data cp;
- bool *builtin;
- void **data;
- size_t *size;
+ const char *path;
+ bool use_pa;
-#ifdef CONFIG_X86_32
- data = (void **)__pa_nodebug(&ucode_cpio.data);
- size = (size_t *)__pa_nodebug(&ucode_cpio.size);
- builtin = (bool *)__pa_nodebug(&ucode_builtin);
-#else
- data = &ucode_cpio.data;
- size = &ucode_cpio.size;
- builtin = &ucode_builtin;
-#endif
+ if (IS_ENABLED(CONFIG_X86_32)) {
+ uci = (struct ucode_cpu_info *)__pa_nodebug(ucode_cpu_info);
+ path = (const char *)__pa_nodebug(ucode_path);
+ use_pa = true;
+ } else {
+ uci = ucode_cpu_info;
+ path = ucode_path;
+ use_pa = false;
+ }
- *builtin = load_builtin_amd_microcode(&cp, family);
- if (!*builtin)
- cp = find_ucode_in_initrd();
+ if (!get_builtin_microcode(&cp, family))
+ cp = find_microcode_in_initrd(path, use_pa);
if (!(cp.data && cp.size))
return;
- *data = cp.data;
- *size = cp.size;
+ /* Get BSP's CPUID.EAX(1), needed in load_microcode_amd() */
+ uci->cpu_sig.sig = cpuid_eax(1);
- apply_ucode_in_initrd(cp.data, cp.size, true);
+ apply_microcode_early_amd(cp.data, cp.size, true);
}
#ifdef CONFIG_X86_32
/*
* On 32-bit, since AP's early load occurs before paging is turned on, we
- * cannot traverse cpu_equiv_table and pcache in kernel heap memory. So during
- * cold boot, AP will apply_ucode_in_initrd() just like the BSP. During
- * save_microcode_in_initrd_amd() BSP's patch is copied to amd_ucode_patch,
+ * cannot traverse cpu_equiv_table and microcode_cache in kernel heap memory.
+ * So during cold boot, AP will apply_ucode_in_initrd() just like the BSP.
+ * In save_microcode_in_initrd_amd() BSP's patch is copied to amd_ucode_patch,
* which is used upon resume from suspend.
*/
-void load_ucode_amd_ap(void)
+void load_ucode_amd_ap(unsigned int family)
{
struct microcode_amd *mc;
- size_t *usize;
- void **ucode;
+ struct cpio_data cp;
mc = (struct microcode_amd *)__pa_nodebug(amd_ucode_patch);
if (mc->hdr.patch_id && mc->hdr.processor_rev_id) {
@@ -329,60 +339,63 @@ void load_ucode_amd_ap(void)
return;
}
- ucode = (void *)__pa_nodebug(&container);
- usize = (size_t *)__pa_nodebug(&container_size);
+ if (!get_builtin_microcode(&cp, family))
+ cp = find_microcode_in_initrd((const char *)__pa_nodebug(ucode_path), true);
- if (!*ucode || !*usize)
+ if (!(cp.data && cp.size))
return;
- apply_ucode_in_initrd(*ucode, *usize, false);
-}
-
-static void __init collect_cpu_sig_on_bsp(void *arg)
-{
- unsigned int cpu = smp_processor_id();
- struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
-
- uci->cpu_sig.sig = cpuid_eax(0x00000001);
-}
-
-static void __init get_bsp_sig(void)
-{
- unsigned int bsp = boot_cpu_data.cpu_index;
- struct ucode_cpu_info *uci = ucode_cpu_info + bsp;
-
- if (!uci->cpu_sig.sig)
- smp_call_function_single(bsp, collect_cpu_sig_on_bsp, NULL, 1);
+ /*
+ * This would set amd_ucode_patch above so that the following APs can
+ * use it directly instead of going down this path again.
+ */
+ apply_microcode_early_amd(cp.data, cp.size, true);
}
#else
-void load_ucode_amd_ap(void)
+void load_ucode_amd_ap(unsigned int family)
{
- unsigned int cpu = smp_processor_id();
struct equiv_cpu_entry *eq;
struct microcode_amd *mc;
- u8 *cont = container;
u32 rev, eax;
u16 eq_id;
- /* Exit if called on the BSP. */
- if (!cpu)
+ /* 64-bit runs with paging enabled, thus early==false. */
+ if (check_current_patch_level(&rev, false))
return;
- if (!container)
- return;
+ /* First AP hasn't cached it yet, go through the blob. */
+ if (!cont.data) {
+ struct cpio_data cp = { NULL, 0, "" };
- /*
- * 64-bit runs with paging enabled, thus early==false.
- */
- if (check_current_patch_level(&rev, false))
- return;
+ if (cont.size == -1)
+ return;
- /* Add CONFIG_RANDOMIZE_MEMORY offset. */
- if (!ucode_builtin)
- cont += PAGE_OFFSET - __PAGE_OFFSET_BASE;
+reget:
+ if (!get_builtin_microcode(&cp, family)) {
+#ifdef CONFIG_BLK_DEV_INITRD
+ cp = find_cpio_data(ucode_path, (void *)initrd_start,
+ initrd_end - initrd_start, NULL);
+#endif
+ if (!(cp.data && cp.size)) {
+ /*
+ * Mark it so that other APs do not scan again
+ * for no real reason and slow down boot
+ * needlessly.
+ */
+ cont.size = -1;
+ return;
+ }
+ }
+
+ cont = apply_microcode_early_amd(cp.data, cp.size, false);
+ if (!(cont.data && cont.size)) {
+ cont.size = -1;
+ return;
+ }
+ }
eax = cpuid_eax(0x00000001);
- eq = (struct equiv_cpu_entry *)(cont + CONTAINER_HDR_SZ);
+ eq = (struct equiv_cpu_entry *)(cont.data + CONTAINER_HDR_SZ);
eq_id = find_equiv_id(eq, eax);
if (!eq_id)
@@ -397,61 +410,50 @@ void load_ucode_amd_ap(void)
}
} else {
- if (!ucode_cpio.data)
- return;
/*
* AP has a different equivalence ID than BSP, looks like
* mixed-steppings silicon so go through the ucode blob anew.
*/
- apply_ucode_in_initrd(ucode_cpio.data, ucode_cpio.size, false);
+ goto reget;
}
}
-#endif
+#endif /* CONFIG_X86_32 */
+
+static enum ucode_state
+load_microcode_amd(int cpu, u8 family, const u8 *data, size_t size);
-int __init save_microcode_in_initrd_amd(void)
+int __init save_microcode_in_initrd_amd(unsigned int fam)
{
- unsigned long cont;
- int retval = 0;
enum ucode_state ret;
- u8 *cont_va;
- u32 eax;
+ int retval = 0;
+ u16 eq_id;
- if (!container)
- return -EINVAL;
+ if (!cont.data) {
+ if (IS_ENABLED(CONFIG_X86_32) && (cont.size != -1)) {
+ struct cpio_data cp = { NULL, 0, "" };
-#ifdef CONFIG_X86_32
- get_bsp_sig();
- cont = (unsigned long)container;
- cont_va = __va(container);
-#else
- /*
- * We need the physical address of the container for both bitness since
- * boot_params.hdr.ramdisk_image is a physical address.
- */
- cont = __pa_nodebug(container);
- cont_va = container;
+#ifdef CONFIG_BLK_DEV_INITRD
+ cp = find_cpio_data(ucode_path, (void *)initrd_start,
+ initrd_end - initrd_start, NULL);
#endif
- /*
- * Take into account the fact that the ramdisk might get relocated and
- * therefore we need to recompute the container's position in virtual
- * memory space.
- */
- if (relocated_ramdisk)
- container = (u8 *)(__va(relocated_ramdisk) +
- (cont - boot_params.hdr.ramdisk_image));
- else
- container = cont_va;
+ if (!(cp.data && cp.size)) {
+ cont.size = -1;
+ return -EINVAL;
+ }
- /* Add CONFIG_RANDOMIZE_MEMORY offset. */
- if (!ucode_builtin)
- container += PAGE_OFFSET - __PAGE_OFFSET_BASE;
+ cont = find_proper_container(cp.data, cp.size, &eq_id);
+ if (!eq_id) {
+ cont.size = -1;
+ return -EINVAL;
+ }
- eax = cpuid_eax(0x00000001);
- eax = ((eax >> 8) & 0xf) + ((eax >> 20) & 0xff);
+ } else
+ return -EINVAL;
+ }
- ret = load_microcode_amd(smp_processor_id(), eax, container, container_size);
+ ret = load_microcode_amd(smp_processor_id(), fam, cont.data, cont.size);
if (ret != UCODE_OK)
retval = -EINVAL;
@@ -459,8 +461,8 @@ int __init save_microcode_in_initrd_amd(void)
* This will be freed any msec now, stash patches for the current
* family and switch to patch cache for cpu hotplug, etc later.
*/
- container = NULL;
- container_size = 0;
+ cont.data = NULL;
+ cont.size = 0;
return retval;
}
@@ -478,8 +480,10 @@ void reload_ucode_amd(void)
return;
mc = (struct microcode_amd *)amd_ucode_patch;
+ if (!mc)
+ return;
- if (mc && rev < mc->hdr.patch_id) {
+ if (rev < mc->hdr.patch_id) {
if (!__apply_microcode_amd(mc)) {
ucode_new_rev = mc->hdr.patch_id;
pr_info("reload patch_level=0x%08x\n", ucode_new_rev);
@@ -513,7 +517,7 @@ static struct ucode_patch *cache_find_patch(u16 equiv_cpu)
{
struct ucode_patch *p;
- list_for_each_entry(p, &pcache, plist)
+ list_for_each_entry(p, &microcode_cache, plist)
if (p->equiv_cpu == equiv_cpu)
return p;
return NULL;
@@ -523,7 +527,7 @@ static void update_cache(struct ucode_patch *new_patch)
{
struct ucode_patch *p;
- list_for_each_entry(p, &pcache, plist) {
+ list_for_each_entry(p, &microcode_cache, plist) {
if (p->equiv_cpu == new_patch->equiv_cpu) {
if (p->patch_id >= new_patch->patch_id)
/* we already have the latest patch */
@@ -536,14 +540,14 @@ static void update_cache(struct ucode_patch *new_patch)
}
}
/* no patch found, add it */
- list_add_tail(&new_patch->plist, &pcache);
+ list_add_tail(&new_patch->plist, &microcode_cache);
}
static void free_cache(void)
{
struct ucode_patch *p, *tmp;
- list_for_each_entry_safe(p, tmp, &pcache, plist) {
+ list_for_each_entry_safe(p, tmp, &microcode_cache, plist) {
__list_del(p->plist.prev, p->plist.next);
kfree(p->data);
kfree(p);
@@ -663,21 +667,7 @@ bool check_current_patch_level(u32 *rev, bool early)
return ret;
}
-int __apply_microcode_amd(struct microcode_amd *mc_amd)
-{
- u32 rev, dummy;
-
- native_wrmsrl(MSR_AMD64_PATCH_LOADER, (u64)(long)&mc_amd->hdr.data_code);
-
- /* verify patch application was successful */
- native_rdmsr(MSR_AMD64_PATCH_LEVEL, rev, dummy);
- if (rev != mc_amd->hdr.patch_id)
- return -1;
-
- return 0;
-}
-
-int apply_microcode_amd(int cpu)
+static int apply_microcode_amd(int cpu)
{
struct cpuinfo_x86 *c = &cpu_data(cpu);
struct microcode_amd *mc_amd;
@@ -860,7 +850,8 @@ static enum ucode_state __load_microcode_amd(u8 family, const u8 *data,
return UCODE_OK;
}
-enum ucode_state load_microcode_amd(int cpu, u8 family, const u8 *data, size_t size)
+static enum ucode_state
+load_microcode_amd(int cpu, u8 family, const u8 *data, size_t size)
{
enum ucode_state ret;
diff --git a/arch/x86/kernel/cpu/microcode/core.c b/arch/x86/kernel/cpu/microcode/core.c
index 5ce5155f0695..6996413c78c3 100644
--- a/arch/x86/kernel/cpu/microcode/core.c
+++ b/arch/x86/kernel/cpu/microcode/core.c
@@ -3,7 +3,7 @@
*
* Copyright (C) 2000-2006 Tigran Aivazian <tigran@aivazian.fsnet.co.uk>
* 2006 Shaohua Li <shaohua.li@intel.com>
- * 2013-2015 Borislav Petkov <bp@alien8.de>
+ * 2013-2016 Borislav Petkov <bp@alien8.de>
*
* X86 CPU microcode early update for Linux:
*
@@ -39,12 +39,15 @@
#include <asm/microcode.h>
#include <asm/processor.h>
#include <asm/cmdline.h>
+#include <asm/setup.h>
-#define MICROCODE_VERSION "2.01"
+#define DRIVER_VERSION "2.2"
static struct microcode_ops *microcode_ops;
static bool dis_ucode_ldr;
+LIST_HEAD(microcode_cache);
+
/*
* Synchronization.
*
@@ -167,7 +170,7 @@ void load_ucode_ap(void)
break;
case X86_VENDOR_AMD:
if (family >= 0x10)
- load_ucode_amd_ap();
+ load_ucode_amd_ap(family);
break;
default:
break;
@@ -185,7 +188,7 @@ static int __init save_microcode_in_initrd(void)
break;
case X86_VENDOR_AMD:
if (c->x86 >= 0x10)
- return save_microcode_in_initrd_amd();
+ return save_microcode_in_initrd_amd(c->x86);
break;
default:
break;
@@ -194,6 +197,58 @@ static int __init save_microcode_in_initrd(void)
return -EINVAL;
}
+struct cpio_data find_microcode_in_initrd(const char *path, bool use_pa)
+{
+#ifdef CONFIG_BLK_DEV_INITRD
+ unsigned long start = 0;
+ size_t size;
+
+#ifdef CONFIG_X86_32
+ struct boot_params *params;
+
+ if (use_pa)
+ params = (struct boot_params *)__pa_nodebug(&boot_params);
+ else
+ params = &boot_params;
+
+ size = params->hdr.ramdisk_size;
+
+ /*
+ * Set start only if we have an initrd image. We cannot use initrd_start
+ * because it is not set that early yet.
+ */
+ if (size)
+ start = params->hdr.ramdisk_image;
+
+# else /* CONFIG_X86_64 */
+ size = (unsigned long)boot_params.ext_ramdisk_size << 32;
+ size |= boot_params.hdr.ramdisk_size;
+
+ if (size) {
+ start = (unsigned long)boot_params.ext_ramdisk_image << 32;
+ start |= boot_params.hdr.ramdisk_image;
+
+ start += PAGE_OFFSET;
+ }
+# endif
+
+ /*
+ * Did we relocate the ramdisk?
+ *
+ * So we possibly relocate the ramdisk *after* applying microcode on the
+ * BSP so we rely on use_pa (use physical addresses) - even if it is not
+ * absolutely correct - to determine whether we've done the ramdisk
+ * relocation already.
+ */
+ if (!use_pa && relocated_ramdisk)
+ start = initrd_start;
+
+ return find_cpio_data(path, (void *)start, size, NULL);
+#else /* !CONFIG_BLK_DEV_INITRD */
+ return (struct cpio_data){ NULL, 0, "" };
+#endif
+}
+
void reload_early_microcode(void)
{
int vendor, family;
@@ -453,16 +508,17 @@ static struct attribute_group mc_attr_group = {
static void microcode_fini_cpu(int cpu)
{
- microcode_ops->microcode_fini_cpu(cpu);
+ if (microcode_ops->microcode_fini_cpu)
+ microcode_ops->microcode_fini_cpu(cpu);
}
static enum ucode_state microcode_resume_cpu(int cpu)
{
- pr_debug("CPU%d updated upon resume\n", cpu);
-
if (apply_microcode_on_target(cpu))
return UCODE_ERROR;
+ pr_debug("CPU%d updated upon resume\n", cpu);
+
return UCODE_OK;
}
@@ -496,6 +552,9 @@ static enum ucode_state microcode_update_cpu(int cpu)
{
struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
+ /* Refresh CPU microcode revision after resume. */
+ collect_cpu_info(cpu);
+
if (uci->valid)
return microcode_resume_cpu(cpu);
@@ -579,12 +638,7 @@ static int mc_cpu_down_prep(unsigned int cpu)
/* Suspend is in progress, only remove the interface */
sysfs_remove_group(&dev->kobj, &mc_attr_group);
pr_debug("CPU%d removed\n", cpu);
- /*
- * When a CPU goes offline, don't free up or invalidate the copy of
- * the microcode in kernel memory, so that we can reuse it when the
- * CPU comes back online without unnecessarily requesting the userspace
- * for it again.
- */
+
return 0;
}
@@ -649,8 +703,7 @@ int __init microcode_init(void)
cpuhp_setup_state_nocalls(CPUHP_AP_ONLINE_DYN, "x86/microcode:online",
mc_cpu_online, mc_cpu_down_prep);
- pr_info("Microcode Update Driver: v" MICROCODE_VERSION
- " <tigran@aivazian.fsnet.co.uk>, Peter Oruba\n");
+ pr_info("Microcode Update Driver: v%s.", DRIVER_VERSION);
return 0;
diff --git a/arch/x86/kernel/cpu/microcode/intel.c b/arch/x86/kernel/cpu/microcode/intel.c
index cdc0deab00c9..54d50c3694d8 100644
--- a/arch/x86/kernel/cpu/microcode/intel.c
+++ b/arch/x86/kernel/cpu/microcode/intel.c
@@ -39,125 +39,83 @@
#include <asm/setup.h>
#include <asm/msr.h>
-/*
- * Temporary microcode blobs pointers storage. We note here during early load
- * the pointers to microcode blobs we've got from whatever storage (detached
- * initrd, builtin). Later on, we put those into final storage
- * mc_saved_data.mc_saved.
- *
- * Important: those are offsets from the beginning of initrd or absolute
- * addresses within the kernel image when built-in.
- */
-static unsigned long mc_tmp_ptrs[MAX_UCODE_COUNT];
-
-static struct mc_saved_data {
- unsigned int num_saved;
- struct microcode_intel **mc_saved;
-} mc_saved_data;
+static const char ucode_path[] = "kernel/x86/microcode/GenuineIntel.bin";
-/* Microcode blobs within the initrd. 0 if builtin. */
-static struct ucode_blobs {
- unsigned long start;
- bool valid;
-} blobs;
+/* Current microcode patch used in early patching */
+struct microcode_intel *intel_ucode_patch;
-/* Go through saved patches and find the one suitable for the current CPU. */
-static enum ucode_state
-find_microcode_patch(struct microcode_intel **saved,
- unsigned int num_saved, struct ucode_cpu_info *uci)
+static inline bool cpu_signatures_match(unsigned int s1, unsigned int p1,
+ unsigned int s2, unsigned int p2)
{
- struct microcode_intel *ucode_ptr, *new_mc = NULL;
- struct microcode_header_intel *mc_hdr;
- int new_rev, ret, i;
-
- new_rev = uci->cpu_sig.rev;
-
- for (i = 0; i < num_saved; i++) {
- ucode_ptr = saved[i];
- mc_hdr = (struct microcode_header_intel *)ucode_ptr;
-
- ret = has_newer_microcode(ucode_ptr,
- uci->cpu_sig.sig,
- uci->cpu_sig.pf,
- new_rev);
- if (!ret)
- continue;
-
- new_rev = mc_hdr->rev;
- new_mc = ucode_ptr;
- }
+ if (s1 != s2)
+ return false;
- if (!new_mc)
- return UCODE_NFOUND;
+ /* Processor flags are either both 0 ... */
+ if (!p1 && !p2)
+ return true;
- uci->mc = (struct microcode_intel *)new_mc;
- return UCODE_OK;
+ /* ... or they intersect. */
+ return p1 & p2;
}
-static inline void
-copy_ptrs(struct microcode_intel **mc_saved, unsigned long *mc_ptrs,
- unsigned long off, int num_saved)
+/*
+ * Returns 1 if update has been found, 0 otherwise.
+ */
+static int find_matching_signature(void *mc, unsigned int csig, int cpf)
{
+ struct microcode_header_intel *mc_hdr = mc;
+ struct extended_sigtable *ext_hdr;
+ struct extended_signature *ext_sig;
int i;
- for (i = 0; i < num_saved; i++)
- mc_saved[i] = (struct microcode_intel *)(mc_ptrs[i] + off);
-}
-
-#ifdef CONFIG_X86_32
-static void
-microcode_phys(struct microcode_intel **mc_saved_tmp, struct mc_saved_data *mcs)
-{
- int i;
- struct microcode_intel ***mc_saved;
+ if (cpu_signatures_match(csig, cpf, mc_hdr->sig, mc_hdr->pf))
+ return 1;
- mc_saved = (struct microcode_intel ***)__pa_nodebug(&mcs->mc_saved);
+ /* Look for ext. headers: */
+ if (get_totalsize(mc_hdr) <= get_datasize(mc_hdr) + MC_HEADER_SIZE)
+ return 0;
- for (i = 0; i < mcs->num_saved; i++) {
- struct microcode_intel *p;
+ ext_hdr = mc + get_datasize(mc_hdr) + MC_HEADER_SIZE;
+ ext_sig = (void *)ext_hdr + EXT_HEADER_SIZE;
- p = *(struct microcode_intel **)__pa_nodebug(mcs->mc_saved + i);
- mc_saved_tmp[i] = (struct microcode_intel *)__pa_nodebug(p);
+ for (i = 0; i < ext_hdr->count; i++) {
+ if (cpu_signatures_match(csig, cpf, ext_sig->sig, ext_sig->pf))
+ return 1;
+ ext_sig++;
}
+ return 0;
}
-#endif
-static enum ucode_state
-load_microcode(struct mc_saved_data *mcs, unsigned long *mc_ptrs,
- unsigned long offset, struct ucode_cpu_info *uci)
+/*
+ * Returns 1 if update has been found, 0 otherwise.
+ */
+static int has_newer_microcode(void *mc, unsigned int csig, int cpf, int new_rev)
{
- struct microcode_intel *mc_saved_tmp[MAX_UCODE_COUNT];
- unsigned int count = mcs->num_saved;
+ struct microcode_header_intel *mc_hdr = mc;
- if (!mcs->mc_saved) {
- copy_ptrs(mc_saved_tmp, mc_ptrs, offset, count);
+ if (mc_hdr->rev <= new_rev)
+ return 0;
- return find_microcode_patch(mc_saved_tmp, count, uci);
- } else {
-#ifdef CONFIG_X86_32
- microcode_phys(mc_saved_tmp, mcs);
- return find_microcode_patch(mc_saved_tmp, count, uci);
-#else
- return find_microcode_patch(mcs->mc_saved, count, uci);
-#endif
- }
+ return find_matching_signature(mc, csig, cpf);
}
/*
* Given CPU signature and a microcode patch, this function finds if the
* microcode patch has matching family and model with the CPU.
+ *
+ * %true - if there's a match
+ * %false - otherwise
*/
-static enum ucode_state
-matching_model_microcode(struct microcode_header_intel *mc_header,
- unsigned long sig)
+static bool microcode_matches(struct microcode_header_intel *mc_header,
+ unsigned long sig)
{
- unsigned int fam, model;
- unsigned int fam_ucode, model_ucode;
- struct extended_sigtable *ext_header;
unsigned long total_size = get_totalsize(mc_header);
unsigned long data_size = get_datasize(mc_header);
- int ext_sigcount, i;
+ struct extended_sigtable *ext_header;
+ unsigned int fam_ucode, model_ucode;
struct extended_signature *ext_sig;
+ unsigned int fam, model;
+ int ext_sigcount, i;
fam = x86_family(sig);
model = x86_model(sig);
@@ -166,11 +124,11 @@ matching_model_microcode(struct microcode_header_intel *mc_header,
model_ucode = x86_model(mc_header->sig);
if (fam == fam_ucode && model == model_ucode)
- return UCODE_OK;
+ return true;
/* Look for ext. headers: */
if (total_size <= data_size + MC_HEADER_SIZE)
- return UCODE_NFOUND;
+ return false;
ext_header = (void *) mc_header + data_size + MC_HEADER_SIZE;
ext_sig = (void *)ext_header + EXT_HEADER_SIZE;
@@ -181,192 +139,242 @@ matching_model_microcode(struct microcode_header_intel *mc_header,
model_ucode = x86_model(ext_sig->sig);
if (fam == fam_ucode && model == model_ucode)
- return UCODE_OK;
+ return true;
ext_sig++;
}
- return UCODE_NFOUND;
+ return false;
}
-static int
-save_microcode(struct mc_saved_data *mcs,
- struct microcode_intel **mc_saved_src,
- unsigned int num_saved)
+static struct ucode_patch *__alloc_microcode_buf(void *data, unsigned int size)
{
- int i, j;
- struct microcode_intel **saved_ptr;
- int ret;
+ struct ucode_patch *p;
- if (!num_saved)
- return -EINVAL;
+ p = kzalloc(size, GFP_KERNEL);
+ if (!p)
+ return ERR_PTR(-ENOMEM);
- /*
- * Copy new microcode data.
- */
- saved_ptr = kcalloc(num_saved, sizeof(struct microcode_intel *), GFP_KERNEL);
- if (!saved_ptr)
- return -ENOMEM;
-
- for (i = 0; i < num_saved; i++) {
- struct microcode_header_intel *mc_hdr;
- struct microcode_intel *mc;
- unsigned long size;
-
- if (!mc_saved_src[i]) {
- ret = -EINVAL;
- goto err;
- }
+ p->data = kmemdup(data, size, GFP_KERNEL);
+ if (!p->data) {
+ kfree(p);
+ return ERR_PTR(-ENOMEM);
+ }
- mc = mc_saved_src[i];
- mc_hdr = &mc->hdr;
- size = get_totalsize(mc_hdr);
+ return p;
+}
- saved_ptr[i] = kmemdup(mc, size, GFP_KERNEL);
- if (!saved_ptr[i]) {
- ret = -ENOMEM;
- goto err;
+static void save_microcode_patch(void *data, unsigned int size)
+{
+ struct microcode_header_intel *mc_hdr, *mc_saved_hdr;
+ struct ucode_patch *iter, *tmp, *p;
+ bool prev_found = false;
+ unsigned int sig, pf;
+
+ mc_hdr = (struct microcode_header_intel *)data;
+
+ list_for_each_entry_safe(iter, tmp, &microcode_cache, plist) {
+ mc_saved_hdr = (struct microcode_header_intel *)iter->data;
+ sig = mc_saved_hdr->sig;
+ pf = mc_saved_hdr->pf;
+
+ if (find_matching_signature(data, sig, pf)) {
+ prev_found = true;
+
+ if (mc_hdr->rev <= mc_saved_hdr->rev)
+ continue;
+
+ p = __alloc_microcode_buf(data, size);
+ if (IS_ERR(p))
+ pr_err("Error allocating buffer %p\n", data);
+ else
+ list_replace(&iter->plist, &p->plist);
}
}
/*
- * Point to newly saved microcode.
+ * There weren't any previous patches found in the list cache; save the
+ * newly found.
*/
- mcs->mc_saved = saved_ptr;
- mcs->num_saved = num_saved;
-
- return 0;
-
-err:
- for (j = 0; j <= i; j++)
- kfree(saved_ptr[j]);
- kfree(saved_ptr);
-
- return ret;
+ if (!prev_found) {
+ p = __alloc_microcode_buf(data, size);
+ if (IS_ERR(p))
+ pr_err("Error allocating buffer for %p\n", data);
+ else
+ list_add_tail(&p->plist, &microcode_cache);
+ }
}
-/*
- * A microcode patch in ucode_ptr is saved into mc_saved
- * - if it has matching signature and newer revision compared to an existing
- * patch mc_saved.
- * - or if it is a newly discovered microcode patch.
- *
- * The microcode patch should have matching model with CPU.
- *
- * Returns: The updated number @num_saved of saved microcode patches.
- */
-static unsigned int _save_mc(struct microcode_intel **mc_saved,
- u8 *ucode_ptr, unsigned int num_saved)
+static int microcode_sanity_check(void *mc, int print_err)
{
- struct microcode_header_intel *mc_hdr, *mc_saved_hdr;
- unsigned int sig, pf;
- int found = 0, i;
+ unsigned long total_size, data_size, ext_table_size;
+ struct microcode_header_intel *mc_header = mc;
+ struct extended_sigtable *ext_header = NULL;
+ u32 sum, orig_sum, ext_sigcount = 0, i;
+ struct extended_signature *ext_sig;
- mc_hdr = (struct microcode_header_intel *)ucode_ptr;
+ total_size = get_totalsize(mc_header);
+ data_size = get_datasize(mc_header);
- for (i = 0; i < num_saved; i++) {
- mc_saved_hdr = (struct microcode_header_intel *)mc_saved[i];
- sig = mc_saved_hdr->sig;
- pf = mc_saved_hdr->pf;
+ if (data_size + MC_HEADER_SIZE > total_size) {
+ if (print_err)
+ pr_err("Error: bad microcode data file size.\n");
+ return -EINVAL;
+ }
- if (!find_matching_signature(ucode_ptr, sig, pf))
- continue;
+ if (mc_header->ldrver != 1 || mc_header->hdrver != 1) {
+ if (print_err)
+ pr_err("Error: invalid/unknown microcode update format.\n");
+ return -EINVAL;
+ }
- found = 1;
+ ext_table_size = total_size - (MC_HEADER_SIZE + data_size);
+ if (ext_table_size) {
+ u32 ext_table_sum = 0;
+ u32 *ext_tablep;
- if (mc_hdr->rev <= mc_saved_hdr->rev)
- continue;
+ if ((ext_table_size < EXT_HEADER_SIZE)
+ || ((ext_table_size - EXT_HEADER_SIZE) % EXT_SIGNATURE_SIZE)) {
+ if (print_err)
+ pr_err("Error: truncated extended signature table.\n");
+ return -EINVAL;
+ }
+
+ ext_header = mc + MC_HEADER_SIZE + data_size;
+ if (ext_table_size != exttable_size(ext_header)) {
+ if (print_err)
+ pr_err("Error: extended signature table size mismatch.\n");
+ return -EFAULT;
+ }
+
+ ext_sigcount = ext_header->count;
/*
- * Found an older ucode saved earlier. Replace it with
- * this newer one.
+ * Check extended table checksum: the sum of all dwords that
+ * comprise a valid table must be 0.
*/
- mc_saved[i] = (struct microcode_intel *)ucode_ptr;
- break;
+ ext_tablep = (u32 *)ext_header;
+
+ i = ext_table_size / sizeof(u32);
+ while (i--)
+ ext_table_sum += ext_tablep[i];
+
+ if (ext_table_sum) {
+ if (print_err)
+ pr_warn("Bad extended signature table checksum, aborting.\n");
+ return -EINVAL;
+ }
+ }
+
+ /*
+ * Calculate the checksum of update data and header. The checksum of
+ * valid update data and header including the extended signature table
+ * must be 0.
+ */
+ orig_sum = 0;
+ i = (MC_HEADER_SIZE + data_size) / sizeof(u32);
+ while (i--)
+ orig_sum += ((u32 *)mc)[i];
+
+ if (orig_sum) {
+ if (print_err)
+ pr_err("Bad microcode data checksum, aborting.\n");
+ return -EINVAL;
}
- /* Newly detected microcode, save it to memory. */
- if (i >= num_saved && !found)
- mc_saved[num_saved++] = (struct microcode_intel *)ucode_ptr;
+ if (!ext_table_size)
+ return 0;
- return num_saved;
+ /*
+ * Check extended signature checksum: 0 => valid.
+ */
+ for (i = 0; i < ext_sigcount; i++) {
+ ext_sig = (void *)ext_header + EXT_HEADER_SIZE +
+ EXT_SIGNATURE_SIZE * i;
+
+ sum = (mc_header->sig + mc_header->pf + mc_header->cksum) -
+ (ext_sig->sig + ext_sig->pf + ext_sig->cksum);
+ if (sum) {
+ if (print_err)
+ pr_err("Bad extended signature checksum, aborting.\n");
+ return -EINVAL;
+ }
+ }
+ return 0;
}
/*
* Get microcode matching with BSP's model. Only CPUs with the same model as
* BSP can stay in the platform.
*/
-static enum ucode_state __init
-get_matching_model_microcode(unsigned long start, void *data, size_t size,
- struct mc_saved_data *mcs, unsigned long *mc_ptrs,
- struct ucode_cpu_info *uci)
+static struct microcode_intel *
+scan_microcode(void *data, size_t size, struct ucode_cpu_info *uci, bool save)
{
- struct microcode_intel *mc_saved_tmp[MAX_UCODE_COUNT];
struct microcode_header_intel *mc_header;
- unsigned int num_saved = mcs->num_saved;
- enum ucode_state state = UCODE_OK;
- unsigned int leftover = size;
- u8 *ucode_ptr = data;
+ struct microcode_intel *patch = NULL;
unsigned int mc_size;
- int i;
-
- while (leftover && num_saved < ARRAY_SIZE(mc_saved_tmp)) {
- if (leftover < sizeof(mc_header))
+ while (size) {
+ if (size < sizeof(struct microcode_header_intel))
break;
- mc_header = (struct microcode_header_intel *)ucode_ptr;
+ mc_header = (struct microcode_header_intel *)data;
mc_size = get_totalsize(mc_header);
- if (!mc_size || mc_size > leftover ||
- microcode_sanity_check(ucode_ptr, 0) < 0)
+ if (!mc_size ||
+ mc_size > size ||
+ microcode_sanity_check(data, 0) < 0)
break;
- leftover -= mc_size;
+ size -= mc_size;
- /*
- * Since APs with same family and model as the BSP may boot in
- * the platform, we need to find and save microcode patches
- * with the same family and model as the BSP.
- */
- if (matching_model_microcode(mc_header, uci->cpu_sig.sig) != UCODE_OK) {
- ucode_ptr += mc_size;
+ if (!microcode_matches(mc_header, uci->cpu_sig.sig)) {
+ data += mc_size;
continue;
}
- num_saved = _save_mc(mc_saved_tmp, ucode_ptr, num_saved);
+ if (save) {
+ save_microcode_patch(data, mc_size);
+ goto next;
+ }
- ucode_ptr += mc_size;
- }
- if (leftover) {
- state = UCODE_ERROR;
- return state;
- }
+ if (!patch) {
+ if (!has_newer_microcode(data,
+ uci->cpu_sig.sig,
+ uci->cpu_sig.pf,
+ uci->cpu_sig.rev))
+ goto next;
- if (!num_saved) {
- state = UCODE_NFOUND;
- return state;
- }
+ } else {
+ struct microcode_header_intel *phdr = &patch->hdr;
- for (i = 0; i < num_saved; i++)
- mc_ptrs[i] = (unsigned long)mc_saved_tmp[i] - start;
+ if (!has_newer_microcode(data,
+ phdr->sig,
+ phdr->pf,
+ phdr->rev))
+ goto next;
+ }
+
+ /* We have a newer patch, save it. */
+ patch = data;
- mcs->num_saved = num_saved;
+next:
+ data += mc_size;
+ }
- return state;
+ if (size)
+ return NULL;
+
+ return patch;
}
static int collect_cpu_info_early(struct ucode_cpu_info *uci)
{
unsigned int val[2];
unsigned int family, model;
- struct cpu_signature csig;
+ struct cpu_signature csig = { 0 };
unsigned int eax, ebx, ecx, edx;
- csig.sig = 0;
- csig.pf = 0;
- csig.rev = 0;
-
memset(uci, 0, sizeof(*uci));
eax = 0x00000001;
@@ -374,8 +382,8 @@ static int collect_cpu_info_early(struct ucode_cpu_info *uci)
native_cpuid(&eax, &ebx, &ecx, &edx);
csig.sig = eax;
- family = x86_family(csig.sig);
- model = x86_model(csig.sig);
+ family = x86_family(eax);
+ model = x86_model(eax);
if ((model >= 5) || (family > 6)) {
/* get processor flags from MSR 0x17 */
@@ -401,40 +409,41 @@ static int collect_cpu_info_early(struct ucode_cpu_info *uci)
static void show_saved_mc(void)
{
#ifdef DEBUG
- int i, j;
+ int i = 0, j;
unsigned int sig, pf, rev, total_size, data_size, date;
struct ucode_cpu_info uci;
+ struct ucode_patch *p;
- if (!mc_saved_data.num_saved) {
+ if (list_empty(&microcode_cache)) {
pr_debug("no microcode data saved.\n");
return;
}
- pr_debug("Total microcode saved: %d\n", mc_saved_data.num_saved);
collect_cpu_info_early(&uci);
- sig = uci.cpu_sig.sig;
- pf = uci.cpu_sig.pf;
- rev = uci.cpu_sig.rev;
+ sig = uci.cpu_sig.sig;
+ pf = uci.cpu_sig.pf;
+ rev = uci.cpu_sig.rev;
pr_debug("CPU: sig=0x%x, pf=0x%x, rev=0x%x\n", sig, pf, rev);
- for (i = 0; i < mc_saved_data.num_saved; i++) {
+ list_for_each_entry(p, &microcode_cache, plist) {
struct microcode_header_intel *mc_saved_header;
struct extended_sigtable *ext_header;
- int ext_sigcount;
struct extended_signature *ext_sig;
+ int ext_sigcount;
+
+ mc_saved_header = (struct microcode_header_intel *)p->data;
- mc_saved_header = (struct microcode_header_intel *)
- mc_saved_data.mc_saved[i];
- sig = mc_saved_header->sig;
- pf = mc_saved_header->pf;
- rev = mc_saved_header->rev;
- total_size = get_totalsize(mc_saved_header);
- data_size = get_datasize(mc_saved_header);
- date = mc_saved_header->date;
+ sig = mc_saved_header->sig;
+ pf = mc_saved_header->pf;
+ rev = mc_saved_header->rev;
+ date = mc_saved_header->date;
+
+ total_size = get_totalsize(mc_saved_header);
+ data_size = get_datasize(mc_saved_header);
pr_debug("mc_saved[%d]: sig=0x%x, pf=0x%x, rev=0x%x, total size=0x%x, date = %04x-%02x-%02x\n",
- i, sig, pf, rev, total_size,
+ i++, sig, pf, rev, total_size,
date & 0xffff,
date >> 24,
(date >> 16) & 0xff);
@@ -443,7 +452,7 @@ static void show_saved_mc(void)
if (total_size <= data_size + MC_HEADER_SIZE)
continue;
- ext_header = (void *) mc_saved_header + data_size + MC_HEADER_SIZE;
+ ext_header = (void *)mc_saved_header + data_size + MC_HEADER_SIZE;
ext_sigcount = ext_header->count;
ext_sig = (void *)ext_header + EXT_HEADER_SIZE;
@@ -456,85 +465,43 @@ static void show_saved_mc(void)
ext_sig++;
}
-
}
#endif
}
/*
- * Save this mc into mc_saved_data. So it will be loaded early when a CPU is
- * hot added or resumes.
- *
- * Please make sure this mc should be a valid microcode patch before calling
- * this function.
+ * Save this microcode patch. It will be loaded early when a CPU is
+ * hot-added or resumes.
*/
-static void save_mc_for_early(u8 *mc)
+static void save_mc_for_early(u8 *mc, unsigned int size)
{
#ifdef CONFIG_HOTPLUG_CPU
/* Synchronization during CPU hotplug. */
static DEFINE_MUTEX(x86_cpu_microcode_mutex);
- struct microcode_intel *mc_saved_tmp[MAX_UCODE_COUNT];
- unsigned int mc_saved_count_init;
- unsigned int num_saved;
- struct microcode_intel **mc_saved;
- int ret, i;
-
mutex_lock(&x86_cpu_microcode_mutex);
- mc_saved_count_init = mc_saved_data.num_saved;
- num_saved = mc_saved_data.num_saved;
- mc_saved = mc_saved_data.mc_saved;
-
- if (mc_saved && num_saved)
- memcpy(mc_saved_tmp, mc_saved,
- num_saved * sizeof(struct microcode_intel *));
- /*
- * Save the microcode patch mc in mc_save_tmp structure if it's a newer
- * version.
- */
- num_saved = _save_mc(mc_saved_tmp, mc, num_saved);
-
- /*
- * Save the mc_save_tmp in global mc_saved_data.
- */
- ret = save_microcode(&mc_saved_data, mc_saved_tmp, num_saved);
- if (ret) {
- pr_err("Cannot save microcode patch.\n");
- goto out;
- }
-
+ save_microcode_patch(mc, size);
show_saved_mc();
- /*
- * Free old saved microcode data.
- */
- if (mc_saved) {
- for (i = 0; i < mc_saved_count_init; i++)
- kfree(mc_saved[i]);
- kfree(mc_saved);
- }
-
-out:
mutex_unlock(&x86_cpu_microcode_mutex);
#endif
}
-static bool __init load_builtin_intel_microcode(struct cpio_data *cp)
+static bool load_builtin_intel_microcode(struct cpio_data *cp)
{
-#ifdef CONFIG_X86_64
- unsigned int eax = 0x00000001, ebx, ecx = 0, edx;
+ unsigned int eax = 1, ebx, ecx = 0, edx;
char name[30];
+ if (IS_ENABLED(CONFIG_X86_32))
+ return false;
+
native_cpuid(&eax, &ebx, &ecx, &edx);
sprintf(name, "intel-ucode/%02x-%02x-%02x",
x86_family(eax), x86_model(eax), x86_stepping(eax));
return get_builtin_firmware(cp, name);
-#else
- return false;
-#endif
}
/*
@@ -570,8 +537,7 @@ void show_ucode_info_early(void)
}
/*
- * At this point, we can not call printk() yet. Keep microcode patch number in
- * mc_saved_data.mc_saved and delay printing microcode info in
+ * At this point, we can not call printk() yet. Delay printing microcode info in
* show_ucode_info_early() until printk() works.
*/
static void print_ucode(struct ucode_cpu_info *uci)
@@ -648,206 +614,140 @@ static int apply_microcode_early(struct ucode_cpu_info *uci, bool early)
return 0;
}
-/*
- * This function converts microcode patch offsets previously stored in
- * mc_tmp_ptrs to pointers and stores the pointers in mc_saved_data.
- */
int __init save_microcode_in_initrd_intel(void)
{
- struct microcode_intel *mc_saved[MAX_UCODE_COUNT];
- unsigned int count = mc_saved_data.num_saved;
- unsigned long offset = 0;
- int ret;
-
- if (!count)
- return 0;
+ struct ucode_cpu_info uci;
+ struct cpio_data cp;
/*
- * We have found a valid initrd but it might've been relocated in the
- * meantime so get its updated address.
+ * AP loading didn't find any microcode patch, no need to save anything.
*/
- if (IS_ENABLED(CONFIG_BLK_DEV_INITRD) && blobs.valid)
- offset = initrd_start;
-
- copy_ptrs(mc_saved, mc_tmp_ptrs, offset, count);
+ if (!intel_ucode_patch || IS_ERR(intel_ucode_patch))
+ return 0;
- ret = save_microcode(&mc_saved_data, mc_saved, count);
- if (ret)
- pr_err("Cannot save microcode patches from initrd.\n");
- else
- show_saved_mc();
+ if (!load_builtin_intel_microcode(&cp))
+ cp = find_microcode_in_initrd(ucode_path, false);
- return ret;
-}
+ if (!(cp.data && cp.size))
+ return 0;
-static __init enum ucode_state
-__scan_microcode_initrd(struct cpio_data *cd, struct ucode_blobs *blbp)
-{
-#ifdef CONFIG_BLK_DEV_INITRD
- static __initdata char ucode_name[] = "kernel/x86/microcode/GenuineIntel.bin";
- char *p = IS_ENABLED(CONFIG_X86_32) ? (char *)__pa_nodebug(ucode_name)
- : ucode_name;
-# ifdef CONFIG_X86_32
- unsigned long start = 0, size;
- struct boot_params *params;
+ collect_cpu_info_early(&uci);
- params = (struct boot_params *)__pa_nodebug(&boot_params);
- size = params->hdr.ramdisk_size;
+ scan_microcode(cp.data, cp.size, &uci, true);
- /*
- * Set start only if we have an initrd image. We cannot use initrd_start
- * because it is not set that early yet.
- */
- start = (size ? params->hdr.ramdisk_image : 0);
+ show_saved_mc();
-# else /* CONFIG_X86_64 */
- unsigned long start = 0, size;
+ return 0;
+}
- size = (u64)boot_params.ext_ramdisk_size << 32;
- size |= boot_params.hdr.ramdisk_size;
- if (size) {
- start = (u64)boot_params.ext_ramdisk_image << 32;
- start |= boot_params.hdr.ramdisk_image;
+/*
+ * @res_patch, output: a pointer to the patch we found.
+ */
+static struct microcode_intel *__load_ucode_intel(struct ucode_cpu_info *uci)
+{
+ static const char *path;
+ struct cpio_data cp;
+ bool use_pa;
- start += PAGE_OFFSET;
+ if (IS_ENABLED(CONFIG_X86_32)) {
+ path = (const char *)__pa_nodebug(ucode_path);
+ use_pa = true;
+ } else {
+ path = ucode_path;
+ use_pa = false;
}
-# endif
-
- *cd = find_cpio_data(p, (void *)start, size, NULL);
- if (cd->data) {
- blbp->start = start;
- blbp->valid = true;
- return UCODE_OK;
- } else
-#endif /* CONFIG_BLK_DEV_INITRD */
- return UCODE_ERROR;
-}
+ /* try built-in microcode first */
+ if (!load_builtin_intel_microcode(&cp))
+ cp = find_microcode_in_initrd(path, use_pa);
-static __init enum ucode_state
-scan_microcode(struct mc_saved_data *mcs, unsigned long *mc_ptrs,
- struct ucode_cpu_info *uci, struct ucode_blobs *blbp)
-{
- struct cpio_data cd = { NULL, 0, "" };
- enum ucode_state ret;
+ if (!(cp.data && cp.size))
+ return NULL;
- /* try built-in microcode first */
- if (load_builtin_intel_microcode(&cd))
- /*
- * Invalidate blobs as we might've gotten an initrd too,
- * supplied by the boot loader, by mistake or simply forgotten
- * there. That's fine, we ignore it since we've found builtin
- * microcode already.
- */
- blbp->valid = false;
- else {
- ret = __scan_microcode_initrd(&cd, blbp);
- if (ret != UCODE_OK)
- return ret;
- }
+ collect_cpu_info_early(uci);
- return get_matching_model_microcode(blbp->start, cd.data, cd.size,
- mcs, mc_ptrs, uci);
+ return scan_microcode(cp.data, cp.size, uci, false);
}
-static void __init
-_load_ucode_intel_bsp(struct mc_saved_data *mcs, unsigned long *mc_ptrs,
- struct ucode_blobs *blbp)
+void __init load_ucode_intel_bsp(void)
{
+ struct microcode_intel *patch;
struct ucode_cpu_info uci;
- enum ucode_state ret;
-
- collect_cpu_info_early(&uci);
- ret = scan_microcode(mcs, mc_ptrs, &uci, blbp);
- if (ret != UCODE_OK)
+ patch = __load_ucode_intel(&uci);
+ if (!patch)
return;
- ret = load_microcode(mcs, mc_ptrs, blbp->start, &uci);
- if (ret != UCODE_OK)
- return;
+ uci.mc = patch;
apply_microcode_early(&uci, true);
}
-void __init load_ucode_intel_bsp(void)
+void load_ucode_intel_ap(void)
{
- struct ucode_blobs *blobs_p;
- struct mc_saved_data *mcs;
- unsigned long *ptrs;
+ struct microcode_intel *patch, **iup;
+ struct ucode_cpu_info uci;
-#ifdef CONFIG_X86_32
- mcs = (struct mc_saved_data *)__pa_nodebug(&mc_saved_data);
- ptrs = (unsigned long *)__pa_nodebug(&mc_tmp_ptrs);
- blobs_p = (struct ucode_blobs *)__pa_nodebug(&blobs);
-#else
- mcs = &mc_saved_data;
- ptrs = mc_tmp_ptrs;
- blobs_p = &blobs;
-#endif
+ if (IS_ENABLED(CONFIG_X86_32))
+ iup = (struct microcode_intel **) __pa_nodebug(&intel_ucode_patch);
+ else
+ iup = &intel_ucode_patch;
+
+reget:
+ if (!*iup) {
+ patch = __load_ucode_intel(&uci);
+ if (!patch)
+ return;
+
+ *iup = patch;
+ }
- _load_ucode_intel_bsp(mcs, ptrs, blobs_p);
+ uci.mc = *iup;
+
+ if (apply_microcode_early(&uci, true)) {
+ /* Mixed-silicon system? Try to refetch the proper patch: */
+ *iup = NULL;
+
+ goto reget;
+ }
}
-void load_ucode_intel_ap(void)
+static struct microcode_intel *find_patch(struct ucode_cpu_info *uci)
{
- struct ucode_blobs *blobs_p;
- unsigned long *ptrs, start = 0;
- struct mc_saved_data *mcs;
- struct ucode_cpu_info uci;
- enum ucode_state ret;
+ struct microcode_header_intel *phdr;
+ struct ucode_patch *iter, *tmp;
-#ifdef CONFIG_X86_32
- mcs = (struct mc_saved_data *)__pa_nodebug(&mc_saved_data);
- ptrs = (unsigned long *)__pa_nodebug(mc_tmp_ptrs);
- blobs_p = (struct ucode_blobs *)__pa_nodebug(&blobs);
-#else
- mcs = &mc_saved_data;
- ptrs = mc_tmp_ptrs;
- blobs_p = &blobs;
-#endif
-
- /*
- * If there is no valid ucode previously saved in memory, no need to
- * update ucode on this AP.
- */
- if (!mcs->num_saved)
- return;
+ list_for_each_entry_safe(iter, tmp, &microcode_cache, plist) {
- if (blobs_p->valid) {
- start = blobs_p->start;
+ phdr = (struct microcode_header_intel *)iter->data;
- /*
- * Pay attention to CONFIG_RANDOMIZE_MEMORY=y as it shuffles
- * physmem mapping too and there we have the initrd.
- */
- start += PAGE_OFFSET - __PAGE_OFFSET_BASE;
- }
+ if (phdr->rev <= uci->cpu_sig.rev)
+ continue;
- collect_cpu_info_early(&uci);
- ret = load_microcode(mcs, ptrs, start, &uci);
- if (ret != UCODE_OK)
- return;
+ if (!find_matching_signature(phdr,
+ uci->cpu_sig.sig,
+ uci->cpu_sig.pf))
+ continue;
- apply_microcode_early(&uci, true);
+ return iter->data;
+ }
+ return NULL;
}
void reload_ucode_intel(void)
{
+ struct microcode_intel *p;
struct ucode_cpu_info uci;
- enum ucode_state ret;
-
- if (!mc_saved_data.num_saved)
- return;
collect_cpu_info_early(&uci);
- ret = find_microcode_patch(mc_saved_data.mc_saved,
- mc_saved_data.num_saved, &uci);
- if (ret != UCODE_OK)
+ p = find_patch(&uci);
+ if (!p)
return;
+ uci.mc = p;
+
apply_microcode_early(&uci, false);
}
@@ -879,24 +779,6 @@ static int collect_cpu_info(int cpu_num, struct cpu_signature *csig)
return 0;
}
-/*
- * return 0 - no update found
- * return 1 - found update
- */
-static int get_matching_mc(struct microcode_intel *mc, int cpu)
-{
- struct cpu_signature cpu_sig;
- unsigned int csig, cpf, crev;
-
- collect_cpu_info(cpu, &cpu_sig);
-
- csig = cpu_sig.sig;
- cpf = cpu_sig.pf;
- crev = cpu_sig.rev;
-
- return has_newer_microcode(mc, csig, cpf, crev);
-}
-
static int apply_microcode_intel(int cpu)
{
struct microcode_intel *mc;
@@ -911,16 +793,12 @@ static int apply_microcode_intel(int cpu)
uci = ucode_cpu_info + cpu;
mc = uci->mc;
- if (!mc)
- return 0;
-
- /*
- * Microcode on this CPU could be updated earlier. Only apply the
- * microcode patch in mc when it is newer than the one on this
- * CPU.
- */
- if (!get_matching_mc(mc, cpu))
- return 0;
+ if (!mc) {
+ /* Look for a newer patch in our cache: */
+ mc = find_patch(uci);
+ if (!mc)
+ return 0;
+ }
/* write microcode via MSR 0x79 */
wrmsrl(MSR_IA32_UCODE_WRITE, (unsigned long)mc->bits);
@@ -962,7 +840,6 @@ static enum ucode_state generic_load_microcode(int cpu, void *data, size_t size,
u8 *ucode_ptr = data, *new_mc = NULL, *mc = NULL;
int new_rev = uci->cpu_sig.rev;
unsigned int leftover = size;
- enum ucode_state state = UCODE_OK;
unsigned int curr_mc_size = 0;
unsigned int csig, cpf;
@@ -1015,14 +892,11 @@ static enum ucode_state generic_load_microcode(int cpu, void *data, size_t size,
if (leftover) {
vfree(new_mc);
- state = UCODE_ERROR;
- goto out;
+ return UCODE_ERROR;
}
- if (!new_mc) {
- state = UCODE_NFOUND;
- goto out;
- }
+ if (!new_mc)
+ return UCODE_NFOUND;
vfree(uci->mc);
uci->mc = (struct microcode_intel *)new_mc;
@@ -1032,12 +906,12 @@ static enum ucode_state generic_load_microcode(int cpu, void *data, size_t size,
* permanent memory. So it will be loaded early when a CPU is hot added
* or resumes.
*/
- save_mc_for_early(new_mc);
+ save_mc_for_early(new_mc, curr_mc_size);
pr_debug("CPU%d found a matching microcode update with version 0x%x (current=0x%x)\n",
cpu, new_rev, uci->cpu_sig.rev);
-out:
- return state;
+
+ return UCODE_OK;
}
static int get_ucode_fw(void *to, const void *from, size_t n)
@@ -1081,20 +955,11 @@ request_microcode_user(int cpu, const void __user *buf, size_t size)
return generic_load_microcode(cpu, (void *)buf, size, &get_ucode_user);
}
-static void microcode_fini_cpu(int cpu)
-{
- struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
-
- vfree(uci->mc);
- uci->mc = NULL;
-}
-
static struct microcode_ops microcode_intel_ops = {
.request_microcode_user = request_microcode_user,
.request_microcode_fw = request_microcode_fw,
.collect_cpu_info = collect_cpu_info,
.apply_microcode = apply_microcode_intel,
- .microcode_fini_cpu = microcode_fini_cpu,
};
struct microcode_ops * __init init_intel_microcode(void)
@@ -1109,4 +974,3 @@ struct microcode_ops * __init init_intel_microcode(void)
return &microcode_intel_ops;
}
-
diff --git a/arch/x86/kernel/cpu/microcode/intel_lib.c b/arch/x86/kernel/cpu/microcode/intel_lib.c
deleted file mode 100644
index 406cb6c0d9dd..000000000000
--- a/arch/x86/kernel/cpu/microcode/intel_lib.c
+++ /dev/null
@@ -1,184 +0,0 @@
-/*
- * Intel CPU Microcode Update Driver for Linux
- *
- * Copyright (C) 2012 Fenghua Yu <fenghua.yu@intel.com>
- * H Peter Anvin" <hpa@zytor.com>
- *
- * This driver allows to upgrade microcode on Intel processors
- * belonging to IA-32 family - PentiumPro, Pentium II,
- * Pentium III, Xeon, Pentium 4, etc.
- *
- * Reference: Section 8.11 of Volume 3a, IA-32 Intel? Architecture
- * Software Developer's Manual
- * Order Number 253668 or free download from:
- *
- * http://developer.intel.com/Assets/PDF/manual/253668.pdf
- *
- * For more information, go to http://www.urbanmyth.org/microcode
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- */
-#include <linux/firmware.h>
-#include <linux/uaccess.h>
-#include <linux/kernel.h>
-
-#include <asm/microcode_intel.h>
-#include <asm/processor.h>
-#include <asm/msr.h>
-
-static inline bool cpu_signatures_match(unsigned int s1, unsigned int p1,
- unsigned int s2, unsigned int p2)
-{
- if (s1 != s2)
- return false;
-
- /* Processor flags are either both 0 ... */
- if (!p1 && !p2)
- return true;
-
- /* ... or they intersect. */
- return p1 & p2;
-}
-
-int microcode_sanity_check(void *mc, int print_err)
-{
- unsigned long total_size, data_size, ext_table_size;
- struct microcode_header_intel *mc_header = mc;
- struct extended_sigtable *ext_header = NULL;
- u32 sum, orig_sum, ext_sigcount = 0, i;
- struct extended_signature *ext_sig;
-
- total_size = get_totalsize(mc_header);
- data_size = get_datasize(mc_header);
-
- if (data_size + MC_HEADER_SIZE > total_size) {
- if (print_err)
- pr_err("Error: bad microcode data file size.\n");
- return -EINVAL;
- }
-
- if (mc_header->ldrver != 1 || mc_header->hdrver != 1) {
- if (print_err)
- pr_err("Error: invalid/unknown microcode update format.\n");
- return -EINVAL;
- }
-
- ext_table_size = total_size - (MC_HEADER_SIZE + data_size);
- if (ext_table_size) {
- u32 ext_table_sum = 0;
- u32 *ext_tablep;
-
- if ((ext_table_size < EXT_HEADER_SIZE)
- || ((ext_table_size - EXT_HEADER_SIZE) % EXT_SIGNATURE_SIZE)) {
- if (print_err)
- pr_err("Error: truncated extended signature table.\n");
- return -EINVAL;
- }
-
- ext_header = mc + MC_HEADER_SIZE + data_size;
- if (ext_table_size != exttable_size(ext_header)) {
- if (print_err)
- pr_err("Error: extended signature table size mismatch.\n");
- return -EFAULT;
- }
-
- ext_sigcount = ext_header->count;
-
- /*
- * Check extended table checksum: the sum of all dwords that
- * comprise a valid table must be 0.
- */
- ext_tablep = (u32 *)ext_header;
-
- i = ext_table_size / sizeof(u32);
- while (i--)
- ext_table_sum += ext_tablep[i];
-
- if (ext_table_sum) {
- if (print_err)
- pr_warn("Bad extended signature table checksum, aborting.\n");
- return -EINVAL;
- }
- }
-
- /*
- * Calculate the checksum of update data and header. The checksum of
- * valid update data and header including the extended signature table
- * must be 0.
- */
- orig_sum = 0;
- i = (MC_HEADER_SIZE + data_size) / sizeof(u32);
- while (i--)
- orig_sum += ((u32 *)mc)[i];
-
- if (orig_sum) {
- if (print_err)
- pr_err("Bad microcode data checksum, aborting.\n");
- return -EINVAL;
- }
-
- if (!ext_table_size)
- return 0;
-
- /*
- * Check extended signature checksum: 0 => valid.
- */
- for (i = 0; i < ext_sigcount; i++) {
- ext_sig = (void *)ext_header + EXT_HEADER_SIZE +
- EXT_SIGNATURE_SIZE * i;
-
- sum = (mc_header->sig + mc_header->pf + mc_header->cksum) -
- (ext_sig->sig + ext_sig->pf + ext_sig->cksum);
- if (sum) {
- if (print_err)
- pr_err("Bad extended signature checksum, aborting.\n");
- return -EINVAL;
- }
- }
- return 0;
-}
-
-/*
- * Returns 1 if update has been found, 0 otherwise.
- */
-int find_matching_signature(void *mc, unsigned int csig, int cpf)
-{
- struct microcode_header_intel *mc_hdr = mc;
- struct extended_sigtable *ext_hdr;
- struct extended_signature *ext_sig;
- int i;
-
- if (cpu_signatures_match(csig, cpf, mc_hdr->sig, mc_hdr->pf))
- return 1;
-
- /* Look for ext. headers: */
- if (get_totalsize(mc_hdr) <= get_datasize(mc_hdr) + MC_HEADER_SIZE)
- return 0;
-
- ext_hdr = mc + get_datasize(mc_hdr) + MC_HEADER_SIZE;
- ext_sig = (void *)ext_hdr + EXT_HEADER_SIZE;
-
- for (i = 0; i < ext_hdr->count; i++) {
- if (cpu_signatures_match(csig, cpf, ext_sig->sig, ext_sig->pf))
- return 1;
- ext_sig++;
- }
- return 0;
-}
-
-/*
- * Returns 1 if update has been found, 0 otherwise.
- */
-int has_newer_microcode(void *mc, unsigned int csig, int cpf, int new_rev)
-{
- struct microcode_header_intel *mc_hdr = mc;
-
- if (mc_hdr->rev <= new_rev)
- return 0;
-
- return find_matching_signature(mc, csig, cpf);
-}
diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c
index 8f44c5a50ab8..6c044543545e 100644
--- a/arch/x86/kernel/cpu/mshyperv.c
+++ b/arch/x86/kernel/cpu/mshyperv.c
@@ -25,7 +25,6 @@
#include <asm/hyperv.h>
#include <asm/mshyperv.h>
#include <asm/desc.h>
-#include <asm/idle.h>
#include <asm/irq_regs.h>
#include <asm/i8259.h>
#include <asm/apic.h>
diff --git a/arch/x86/kernel/cpu/scattered.c b/arch/x86/kernel/cpu/scattered.c
index 1db8dc490b66..d1316f9c8329 100644
--- a/arch/x86/kernel/cpu/scattered.c
+++ b/arch/x86/kernel/cpu/scattered.c
@@ -17,11 +17,17 @@ struct cpuid_bit {
u32 sub_leaf;
};
-enum cpuid_regs {
- CR_EAX = 0,
- CR_ECX,
- CR_EDX,
- CR_EBX
+/* Please keep the leaf sorted by cpuid_bit.level for faster search. */
+static const struct cpuid_bit cpuid_bits[] = {
+ { X86_FEATURE_APERFMPERF, CPUID_ECX, 0, 0x00000006, 0 },
+ { X86_FEATURE_EPB, CPUID_ECX, 3, 0x00000006, 0 },
+ { X86_FEATURE_INTEL_PT, CPUID_EBX, 25, 0x00000007, 0 },
+ { X86_FEATURE_AVX512_4VNNIW, CPUID_EDX, 2, 0x00000007, 0 },
+ { X86_FEATURE_AVX512_4FMAPS, CPUID_EDX, 3, 0x00000007, 0 },
+ { X86_FEATURE_HW_PSTATE, CPUID_EDX, 7, 0x80000007, 0 },
+ { X86_FEATURE_CPB, CPUID_EDX, 9, 0x80000007, 0 },
+ { X86_FEATURE_PROC_FEEDBACK, CPUID_EDX, 11, 0x80000007, 0 },
+ { 0, 0, 0, 0, 0 }
};
void init_scattered_cpuid_features(struct cpuinfo_x86 *c)
@@ -30,18 +36,6 @@ void init_scattered_cpuid_features(struct cpuinfo_x86 *c)
u32 regs[4];
const struct cpuid_bit *cb;
- static const struct cpuid_bit cpuid_bits[] = {
- { X86_FEATURE_INTEL_PT, CR_EBX,25, 0x00000007, 0 },
- { X86_FEATURE_AVX512_4VNNIW, CR_EDX, 2, 0x00000007, 0 },
- { X86_FEATURE_AVX512_4FMAPS, CR_EDX, 3, 0x00000007, 0 },
- { X86_FEATURE_APERFMPERF, CR_ECX, 0, 0x00000006, 0 },
- { X86_FEATURE_EPB, CR_ECX, 3, 0x00000006, 0 },
- { X86_FEATURE_HW_PSTATE, CR_EDX, 7, 0x80000007, 0 },
- { X86_FEATURE_CPB, CR_EDX, 9, 0x80000007, 0 },
- { X86_FEATURE_PROC_FEEDBACK, CR_EDX,11, 0x80000007, 0 },
- { 0, 0, 0, 0, 0 }
- };
-
for (cb = cpuid_bits; cb->feature; cb++) {
/* Verify that the level is valid */
@@ -50,10 +44,35 @@ void init_scattered_cpuid_features(struct cpuinfo_x86 *c)
max_level > (cb->level | 0xffff))
continue;
- cpuid_count(cb->level, cb->sub_leaf, &regs[CR_EAX],
- &regs[CR_EBX], &regs[CR_ECX], &regs[CR_EDX]);
+ cpuid_count(cb->level, cb->sub_leaf, &regs[CPUID_EAX],
+ &regs[CPUID_EBX], &regs[CPUID_ECX],
+ &regs[CPUID_EDX]);
if (regs[cb->reg] & (1 << cb->bit))
set_cpu_cap(c, cb->feature);
}
}
+
+u32 get_scattered_cpuid_leaf(unsigned int level, unsigned int sub_leaf,
+ enum cpuid_regs_idx reg)
+{
+ const struct cpuid_bit *cb;
+ u32 cpuid_val = 0;
+
+ for (cb = cpuid_bits; cb->feature; cb++) {
+
+ if (level > cb->level)
+ continue;
+
+ if (level < cb->level)
+ break;
+
+ if (reg == cb->reg && sub_leaf == cb->sub_leaf) {
+ if (cpu_has(&boot_cpu_data, cb->feature))
+ cpuid_val |= BIT(cb->bit);
+ }
+ }
+
+ return cpuid_val;
+}
+EXPORT_SYMBOL_GPL(get_scattered_cpuid_leaf);
diff --git a/arch/x86/kernel/cpu/vmware.c b/arch/x86/kernel/cpu/vmware.c
index 5130985b758b..891f4dad7b2c 100644
--- a/arch/x86/kernel/cpu/vmware.c
+++ b/arch/x86/kernel/cpu/vmware.c
@@ -24,11 +24,16 @@
#include <linux/dmi.h>
#include <linux/init.h>
#include <linux/export.h>
+#include <linux/clocksource.h>
#include <asm/div64.h>
#include <asm/x86_init.h>
#include <asm/hypervisor.h>
#include <asm/timer.h>
#include <asm/apic.h>
+#include <asm/timer.h>
+
+#undef pr_fmt
+#define pr_fmt(fmt) "vmware: " fmt
#define CPUID_VMWARE_INFO_LEAF 0x40000000
#define VMWARE_HYPERVISOR_MAGIC 0x564D5868
@@ -48,6 +53,8 @@
"2"(VMWARE_HYPERVISOR_PORT), "3"(UINT_MAX) : \
"memory");
+static unsigned long vmware_tsc_khz __ro_after_init;
+
static inline int __vmware_platform(void)
{
uint32_t eax, ebx, ecx, edx;
@@ -57,35 +64,80 @@ static inline int __vmware_platform(void)
static unsigned long vmware_get_tsc_khz(void)
{
- uint64_t tsc_hz, lpj;
- uint32_t eax, ebx, ecx, edx;
+ return vmware_tsc_khz;
+}
- VMWARE_PORT(GETHZ, eax, ebx, ecx, edx);
+#ifdef CONFIG_PARAVIRT
+static struct cyc2ns_data vmware_cyc2ns __ro_after_init;
+static int vmw_sched_clock __initdata = 1;
- tsc_hz = eax | (((uint64_t)ebx) << 32);
- do_div(tsc_hz, 1000);
- BUG_ON(tsc_hz >> 32);
- pr_info("TSC freq read from hypervisor : %lu.%03lu MHz\n",
- (unsigned long) tsc_hz / 1000,
- (unsigned long) tsc_hz % 1000);
-
- if (!preset_lpj) {
- lpj = ((u64)tsc_hz * 1000);
- do_div(lpj, HZ);
- preset_lpj = lpj;
- }
+static __init int setup_vmw_sched_clock(char *s)
+{
+ vmw_sched_clock = 0;
+ return 0;
+}
+early_param("no-vmw-sched-clock", setup_vmw_sched_clock);
+
+static unsigned long long vmware_sched_clock(void)
+{
+ unsigned long long ns;
- return tsc_hz;
+ ns = mul_u64_u32_shr(rdtsc(), vmware_cyc2ns.cyc2ns_mul,
+ vmware_cyc2ns.cyc2ns_shift);
+ ns -= vmware_cyc2ns.cyc2ns_offset;
+ return ns;
}
+static void __init vmware_sched_clock_setup(void)
+{
+ struct cyc2ns_data *d = &vmware_cyc2ns;
+ unsigned long long tsc_now = rdtsc();
+
+ clocks_calc_mult_shift(&d->cyc2ns_mul, &d->cyc2ns_shift,
+ vmware_tsc_khz, NSEC_PER_MSEC, 0);
+ d->cyc2ns_offset = mul_u64_u32_shr(tsc_now, d->cyc2ns_mul,
+ d->cyc2ns_shift);
+
+ pv_time_ops.sched_clock = vmware_sched_clock;
+ pr_info("using sched offset of %llu ns\n", d->cyc2ns_offset);
+}
+
+static void __init vmware_paravirt_ops_setup(void)
+{
+ pv_info.name = "VMware hypervisor";
+ pv_cpu_ops.io_delay = paravirt_nop;
+
+ if (vmware_tsc_khz && vmw_sched_clock)
+ vmware_sched_clock_setup();
+}
+#else
+#define vmware_paravirt_ops_setup() do {} while (0)
+#endif
+
static void __init vmware_platform_setup(void)
{
uint32_t eax, ebx, ecx, edx;
+ uint64_t lpj, tsc_khz;
VMWARE_PORT(GETHZ, eax, ebx, ecx, edx);
if (ebx != UINT_MAX) {
+ lpj = tsc_khz = eax | (((uint64_t)ebx) << 32);
+ do_div(tsc_khz, 1000);
+ WARN_ON(tsc_khz >> 32);
+ pr_info("TSC freq read from hypervisor : %lu.%03lu MHz\n",
+ (unsigned long) tsc_khz / 1000,
+ (unsigned long) tsc_khz % 1000);
+
+ if (!preset_lpj) {
+ do_div(lpj, HZ);
+ preset_lpj = lpj;
+ }
+
+ vmware_tsc_khz = tsc_khz;
x86_platform.calibrate_tsc = vmware_get_tsc_khz;
+ x86_platform.calibrate_cpu = vmware_get_tsc_khz;
+
#ifdef CONFIG_X86_LOCAL_APIC
/* Skip lapic calibration since we know the bus frequency. */
lapic_timer_frequency = ecx / HZ;
@@ -96,6 +148,8 @@ static void __init vmware_platform_setup(void)
pr_warn("Failed to get TSC freq from the hypervisor\n");
}
+ vmware_paravirt_ops_setup();
+
#ifdef CONFIG_X86_IO_APIC
no_timer_check = 1;
#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-23 05:34:50 +0000