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authorJoseph Salisbury <joseph.salisbury@microsoft.com>2021-04-16 17:43:03 -0700
committerWei Liu <wei.liu@kernel.org>2021-04-21 09:49:19 +0000
commit753ed9c95c37d058e50e7d42bbe296ee0bf6670d (patch)
tree8566f7edd4a24ff1f01b79bc12dd37d7dd50304c /arch
parent6523592cee4650c6aa997d69cd0045a01e07a1ef (diff)
drivers: hv: Create a consistent pattern for checking Hyper-V hypercall status
There is not a consistent pattern for checking Hyper-V hypercall status. Existing code uses a number of variants. The variants work, but a consistent pattern would improve the readability of the code, and be more conformant to what the Hyper-V TLFS says about hypercall status. Implemented new helper functions hv_result(), hv_result_success(), and hv_repcomp(). Changed the places where hv_do_hypercall() and related variants are used to use the helper functions. Signed-off-by: Joseph Salisbury <joseph.salisbury@microsoft.com> Reviewed-by: Michael Kelley <mikelley@microsoft.com> Link: https://lore.kernel.org/r/1618620183-9967-2-git-send-email-joseph.salisbury@linux.microsoft.com Signed-off-by: Wei Liu <wei.liu@kernel.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/hyperv/hv_apic.c16
-rw-r--r--arch/x86/hyperv/hv_init.c2
-rw-r--r--arch/x86/hyperv/hv_proc.c25
-rw-r--r--arch/x86/hyperv/irqdomain.c6
-rw-r--r--arch/x86/hyperv/mmu.c8
-rw-r--r--arch/x86/hyperv/nested.c8
-rw-r--r--arch/x86/include/asm/mshyperv.h1
7 files changed, 32 insertions, 34 deletions
diff --git a/arch/x86/hyperv/hv_apic.c b/arch/x86/hyperv/hv_apic.c
index 082a04279f91..90e682a92820 100644
--- a/arch/x86/hyperv/hv_apic.c
+++ b/arch/x86/hyperv/hv_apic.c
@@ -105,7 +105,7 @@ static bool __send_ipi_mask_ex(const struct cpumask *mask, int vector)
struct hv_send_ipi_ex *ipi_arg;
unsigned long flags;
int nr_bank = 0;
- int ret = 1;
+ u64 status = HV_STATUS_INVALID_PARAMETER;
if (!(ms_hyperv.hints & HV_X64_EX_PROCESSOR_MASKS_RECOMMENDED))
return false;
@@ -130,19 +130,19 @@ static bool __send_ipi_mask_ex(const struct cpumask *mask, int vector)
if (!nr_bank)
ipi_arg->vp_set.format = HV_GENERIC_SET_ALL;
- ret = hv_do_rep_hypercall(HVCALL_SEND_IPI_EX, 0, nr_bank,
+ status = hv_do_rep_hypercall(HVCALL_SEND_IPI_EX, 0, nr_bank,
ipi_arg, NULL);
ipi_mask_ex_done:
local_irq_restore(flags);
- return ((ret == 0) ? true : false);
+ return hv_result_success(status);
}
static bool __send_ipi_mask(const struct cpumask *mask, int vector)
{
int cur_cpu, vcpu;
struct hv_send_ipi ipi_arg;
- int ret = 1;
+ u64 status;
trace_hyperv_send_ipi_mask(mask, vector);
@@ -186,9 +186,9 @@ static bool __send_ipi_mask(const struct cpumask *mask, int vector)
__set_bit(vcpu, (unsigned long *)&ipi_arg.cpu_mask);
}
- ret = hv_do_fast_hypercall16(HVCALL_SEND_IPI, ipi_arg.vector,
+ status = hv_do_fast_hypercall16(HVCALL_SEND_IPI, ipi_arg.vector,
ipi_arg.cpu_mask);
- return ((ret == 0) ? true : false);
+ return hv_result_success(status);
do_ex_hypercall:
return __send_ipi_mask_ex(mask, vector);
@@ -197,6 +197,7 @@ do_ex_hypercall:
static bool __send_ipi_one(int cpu, int vector)
{
int vp = hv_cpu_number_to_vp_number(cpu);
+ u64 status;
trace_hyperv_send_ipi_one(cpu, vector);
@@ -209,7 +210,8 @@ static bool __send_ipi_one(int cpu, int vector)
if (vp >= 64)
return __send_ipi_mask_ex(cpumask_of(cpu), vector);
- return !hv_do_fast_hypercall16(HVCALL_SEND_IPI, vector, BIT_ULL(vp));
+ status = hv_do_fast_hypercall16(HVCALL_SEND_IPI, vector, BIT_ULL(vp));
+ return hv_result_success(status);
}
static void hv_send_ipi(int cpu, int vector)
diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c
index 7c9da3f65afa..f7dbfa51a38a 100644
--- a/arch/x86/hyperv/hv_init.c
+++ b/arch/x86/hyperv/hv_init.c
@@ -347,7 +347,7 @@ static void __init hv_get_partition_id(void)
local_irq_save(flags);
output_page = *this_cpu_ptr(hyperv_pcpu_output_arg);
status = hv_do_hypercall(HVCALL_GET_PARTITION_ID, NULL, output_page);
- if ((status & HV_HYPERCALL_RESULT_MASK) != HV_STATUS_SUCCESS) {
+ if (!hv_result_success(status)) {
/* No point in proceeding if this failed */
pr_err("Failed to get partition ID: %lld\n", status);
BUG();
diff --git a/arch/x86/hyperv/hv_proc.c b/arch/x86/hyperv/hv_proc.c
index 27e17ad3ba49..68a0843d4750 100644
--- a/arch/x86/hyperv/hv_proc.c
+++ b/arch/x86/hyperv/hv_proc.c
@@ -92,10 +92,9 @@ int hv_call_deposit_pages(int node, u64 partition_id, u32 num_pages)
status = hv_do_rep_hypercall(HVCALL_DEPOSIT_MEMORY,
page_count, 0, input_page, NULL);
local_irq_restore(flags);
-
- if ((status & HV_HYPERCALL_RESULT_MASK) != HV_STATUS_SUCCESS) {
+ if (!hv_result_success(status)) {
pr_err("Failed to deposit pages: %lld\n", status);
- ret = status;
+ ret = hv_result(status);
goto err_free_allocations;
}
@@ -121,7 +120,7 @@ int hv_call_add_logical_proc(int node, u32 lp_index, u32 apic_id)
struct hv_add_logical_processor_out *output;
u64 status;
unsigned long flags;
- int ret = 0;
+ int ret = HV_STATUS_SUCCESS;
int pxm = node_to_pxm(node);
/*
@@ -147,13 +146,11 @@ int hv_call_add_logical_proc(int node, u32 lp_index, u32 apic_id)
input, output);
local_irq_restore(flags);
- status &= HV_HYPERCALL_RESULT_MASK;
-
- if (status != HV_STATUS_INSUFFICIENT_MEMORY) {
- if (status != HV_STATUS_SUCCESS) {
+ if (hv_result(status) != HV_STATUS_INSUFFICIENT_MEMORY) {
+ if (!hv_result_success(status)) {
pr_err("%s: cpu %u apic ID %u, %lld\n", __func__,
lp_index, apic_id, status);
- ret = status;
+ ret = hv_result(status);
}
break;
}
@@ -168,7 +165,7 @@ int hv_call_create_vp(int node, u64 partition_id, u32 vp_index, u32 flags)
struct hv_create_vp *input;
u64 status;
unsigned long irq_flags;
- int ret = 0;
+ int ret = HV_STATUS_SUCCESS;
int pxm = node_to_pxm(node);
/* Root VPs don't seem to need pages deposited */
@@ -199,13 +196,11 @@ int hv_call_create_vp(int node, u64 partition_id, u32 vp_index, u32 flags)
status = hv_do_hypercall(HVCALL_CREATE_VP, input, NULL);
local_irq_restore(irq_flags);
- status &= HV_HYPERCALL_RESULT_MASK;
-
- if (status != HV_STATUS_INSUFFICIENT_MEMORY) {
- if (status != HV_STATUS_SUCCESS) {
+ if (hv_result(status) != HV_STATUS_INSUFFICIENT_MEMORY) {
+ if (!hv_result_success(status)) {
pr_err("%s: vcpu %u, lp %u, %lld\n", __func__,
vp_index, flags, status);
- ret = status;
+ ret = hv_result(status);
}
break;
}
diff --git a/arch/x86/hyperv/irqdomain.c b/arch/x86/hyperv/irqdomain.c
index 4421a8d92e23..514fc64e23d5 100644
--- a/arch/x86/hyperv/irqdomain.c
+++ b/arch/x86/hyperv/irqdomain.c
@@ -63,10 +63,10 @@ static int hv_map_interrupt(union hv_device_id device_id, bool level,
local_irq_restore(flags);
- if ((status & HV_HYPERCALL_RESULT_MASK) != HV_STATUS_SUCCESS)
+ if (!hv_result_success(status))
pr_err("%s: hypercall failed, status %lld\n", __func__, status);
- return status & HV_HYPERCALL_RESULT_MASK;
+ return hv_result(status);
}
static int hv_unmap_interrupt(u64 id, struct hv_interrupt_entry *old_entry)
@@ -88,7 +88,7 @@ static int hv_unmap_interrupt(u64 id, struct hv_interrupt_entry *old_entry)
status = hv_do_hypercall(HVCALL_UNMAP_DEVICE_INTERRUPT, input, NULL);
local_irq_restore(flags);
- return status & HV_HYPERCALL_RESULT_MASK;
+ return hv_result(status);
}
#ifdef CONFIG_PCI_MSI
diff --git a/arch/x86/hyperv/mmu.c b/arch/x86/hyperv/mmu.c
index 2c87350c1fb0..c0ba8874d9cb 100644
--- a/arch/x86/hyperv/mmu.c
+++ b/arch/x86/hyperv/mmu.c
@@ -58,7 +58,7 @@ static void hyperv_flush_tlb_others(const struct cpumask *cpus,
int cpu, vcpu, gva_n, max_gvas;
struct hv_tlb_flush **flush_pcpu;
struct hv_tlb_flush *flush;
- u64 status = U64_MAX;
+ u64 status;
unsigned long flags;
trace_hyperv_mmu_flush_tlb_others(cpus, info);
@@ -161,7 +161,7 @@ do_ex_hypercall:
check_status:
local_irq_restore(flags);
- if (!(status & HV_HYPERCALL_RESULT_MASK))
+ if (hv_result_success(status))
return;
do_native:
native_flush_tlb_others(cpus, info);
@@ -176,7 +176,7 @@ static u64 hyperv_flush_tlb_others_ex(const struct cpumask *cpus,
u64 status;
if (!(ms_hyperv.hints & HV_X64_EX_PROCESSOR_MASKS_RECOMMENDED))
- return U64_MAX;
+ return HV_STATUS_INVALID_PARAMETER;
flush_pcpu = (struct hv_tlb_flush_ex **)
this_cpu_ptr(hyperv_pcpu_input_arg);
@@ -201,7 +201,7 @@ static u64 hyperv_flush_tlb_others_ex(const struct cpumask *cpus,
flush->hv_vp_set.format = HV_GENERIC_SET_SPARSE_4K;
nr_bank = cpumask_to_vpset(&(flush->hv_vp_set), cpus);
if (nr_bank < 0)
- return U64_MAX;
+ return HV_STATUS_INVALID_PARAMETER;
/*
* We can flush not more than max_gvas with one hypercall. Flush the
diff --git a/arch/x86/hyperv/nested.c b/arch/x86/hyperv/nested.c
index dd0a843f766d..5d70968c8538 100644
--- a/arch/x86/hyperv/nested.c
+++ b/arch/x86/hyperv/nested.c
@@ -47,7 +47,7 @@ int hyperv_flush_guest_mapping(u64 as)
flush, NULL);
local_irq_restore(flags);
- if (!(status & HV_HYPERCALL_RESULT_MASK))
+ if (hv_result_success(status))
ret = 0;
fault:
@@ -92,7 +92,7 @@ int hyperv_flush_guest_mapping_range(u64 as,
{
struct hv_guest_mapping_flush_list **flush_pcpu;
struct hv_guest_mapping_flush_list *flush;
- u64 status = 0;
+ u64 status;
unsigned long flags;
int ret = -ENOTSUPP;
int gpa_n = 0;
@@ -125,10 +125,10 @@ int hyperv_flush_guest_mapping_range(u64 as,
local_irq_restore(flags);
- if (!(status & HV_HYPERCALL_RESULT_MASK))
+ if (hv_result_success(status))
ret = 0;
else
- ret = status;
+ ret = hv_result(status);
fault:
trace_hyperv_nested_flush_guest_mapping_range(as, ret);
return ret;
diff --git a/arch/x86/include/asm/mshyperv.h b/arch/x86/include/asm/mshyperv.h
index be5a543212fe..67ff0d637e55 100644
--- a/arch/x86/include/asm/mshyperv.h
+++ b/arch/x86/include/asm/mshyperv.h
@@ -9,6 +9,7 @@
#include <asm/hyperv-tlfs.h>
#include <asm/nospec-branch.h>
#include <asm/paravirt.h>
+#include <asm/mshyperv.h>
typedef int (*hyperv_fill_flush_list_func)(
struct hv_guest_mapping_flush_list *flush,