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authorMichael Ellerman <mpe@ellerman.id.au>2018-07-19 14:37:57 +1000
committerMichael Ellerman <mpe@ellerman.id.au>2018-07-19 14:37:57 +1000
commitce57c6610cc2d7cde61fc005a2d2090bce46fc73 (patch)
treebe1230fb1773e3de7fb7f6a0adde68ca0468273e /arch/powerpc/kernel
parent9c3250a127901c93b23723dc5859c71a0d068fb8 (diff)
parenta68bd1267b7286b1687905651b404e765046de25 (diff)
Merge branch 'topic/ppc-kvm' into next
Merge in some commits we're sharing with the KVM tree. I manually propagated the change from commit d3d4ffaae439 ("powerpc/powernv/ioda2: Reduce upper limit for DMA window size") into pci-ioda-tce.c. Conflicts: arch/powerpc/include/asm/cputable.h arch/powerpc/platforms/powernv/pci-ioda.c arch/powerpc/platforms/powernv/pci.h
Diffstat (limited to 'arch/powerpc/kernel')
-rw-r--r--arch/powerpc/kernel/asm-offsets.c1
-rw-r--r--arch/powerpc/kernel/cputable.c19
-rw-r--r--arch/powerpc/kernel/dt_cpu_ftrs.c4
-rw-r--r--arch/powerpc/kernel/exceptions-64s.S4
-rw-r--r--arch/powerpc/kernel/idle_book3s.S50
-rw-r--r--arch/powerpc/kernel/process.c10
6 files changed, 3 insertions, 85 deletions
diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c
index 0a0544335950..89cf15566c4e 100644
--- a/arch/powerpc/kernel/asm-offsets.c
+++ b/arch/powerpc/kernel/asm-offsets.c
@@ -766,7 +766,6 @@ int main(void)
OFFSET(PACA_THREAD_IDLE_STATE, paca_struct, thread_idle_state);
OFFSET(PACA_THREAD_MASK, paca_struct, thread_mask);
OFFSET(PACA_SUBCORE_SIBLING_MASK, paca_struct, subcore_sibling_mask);
- OFFSET(PACA_SIBLING_PACA_PTRS, paca_struct, thread_sibling_pacas);
OFFSET(PACA_REQ_PSSCR, paca_struct, requested_psscr);
OFFSET(PACA_DONT_STOP, paca_struct, dont_stop);
#define STOP_SPR(x, f) OFFSET(x, paca_struct, stop_sprs.f)
diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
index 9169ffdbab08..2da01340c84c 100644
--- a/arch/powerpc/kernel/cputable.c
+++ b/arch/powerpc/kernel/cputable.c
@@ -466,25 +466,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
.machine_check_early = __machine_check_early_realmode_p8,
.platform = "power8",
},
- { /* Power9 DD1*/
- .pvr_mask = 0xffffff00,
- .pvr_value = 0x004e0100,
- .cpu_name = "POWER9 (raw)",
- .cpu_features = CPU_FTRS_POWER9_DD1,
- .cpu_user_features = COMMON_USER_POWER9,
- .cpu_user_features2 = COMMON_USER2_POWER9,
- .mmu_features = MMU_FTRS_POWER9,
- .icache_bsize = 128,
- .dcache_bsize = 128,
- .num_pmcs = 6,
- .pmc_type = PPC_PMC_IBM,
- .oprofile_cpu_type = "ppc64/power9",
- .oprofile_type = PPC_OPROFILE_INVALID,
- .cpu_setup = __setup_cpu_power9,
- .cpu_restore = __restore_cpu_power9,
- .machine_check_early = __machine_check_early_realmode_p9,
- .platform = "power9",
- },
{ /* Power9 DD2.0 */
.pvr_mask = 0xffffefff,
.pvr_value = 0x004e0200,
diff --git a/arch/powerpc/kernel/dt_cpu_ftrs.c b/arch/powerpc/kernel/dt_cpu_ftrs.c
index 96dd3d871986..f432054234a4 100644
--- a/arch/powerpc/kernel/dt_cpu_ftrs.c
+++ b/arch/powerpc/kernel/dt_cpu_ftrs.c
@@ -701,9 +701,7 @@ static __init void cpufeatures_cpu_quirks(void)
/*
* Not all quirks can be derived from the cpufeatures device tree.
*/
- if ((version & 0xffffff00) == 0x004e0100)
- cur_cpu_spec->cpu_features |= CPU_FTR_POWER9_DD1;
- else if ((version & 0xffffefff) == 0x004e0200)
+ if ((version & 0xffffefff) == 0x004e0200)
; /* DD2.0 has no feature flag */
else if ((version & 0xffffefff) == 0x004e0201)
cur_cpu_spec->cpu_features |= CPU_FTR_POWER9_DD2_1;
diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
index 285c6465324a..76a14702cb9c 100644
--- a/arch/powerpc/kernel/exceptions-64s.S
+++ b/arch/powerpc/kernel/exceptions-64s.S
@@ -276,9 +276,7 @@ BEGIN_FTR_SECTION
*
* This interrupt can wake directly from idle. If that is the case,
* the machine check is handled then the idle wakeup code is called
- * to restore state. In that case, the POWER9 DD1 idle PACA workaround
- * is not applied in the early machine check code, which will cause
- * bugs.
+ * to restore state.
*/
mr r11,r1 /* Save r1 */
lhz r10,PACA_IN_MCE(r13)
diff --git a/arch/powerpc/kernel/idle_book3s.S b/arch/powerpc/kernel/idle_book3s.S
index e734f6e45abc..d85d5515a091 100644
--- a/arch/powerpc/kernel/idle_book3s.S
+++ b/arch/powerpc/kernel/idle_book3s.S
@@ -467,43 +467,6 @@ END_FTR_SECTION_IFSET(CPU_FTR_P9_TM_XER_SO_BUG)
#endif
/*
- * On waking up from stop 0,1,2 with ESL=1 on POWER9 DD1,
- * HSPRG0 will be set to the HSPRG0 value of one of the
- * threads in this core. Thus the value we have in r13
- * may not be this thread's paca pointer.
- *
- * Fortunately, the TIR remains invariant. Since this thread's
- * paca pointer is recorded in all its sibling's paca, we can
- * correctly recover this thread's paca pointer if we
- * know the index of this thread in the core.
- *
- * This index can be obtained from the TIR.
- *
- * i.e, thread's position in the core = TIR.
- * If this value is i, then this thread's paca is
- * paca->thread_sibling_pacas[i].
- */
-power9_dd1_recover_paca:
- mfspr r4, SPRN_TIR
- /*
- * Since each entry in thread_sibling_pacas is 8 bytes
- * we need to left-shift by 3 bits. Thus r4 = i * 8
- */
- sldi r4, r4, 3
- /* Get &paca->thread_sibling_pacas[0] in r5 */
- ld r5, PACA_SIBLING_PACA_PTRS(r13)
- /* Load paca->thread_sibling_pacas[i] into r13 */
- ldx r13, r4, r5
- SET_PACA(r13)
- /*
- * Indicate that we have lost NVGPR state
- * which needs to be restored from the stack.
- */
- li r3, 1
- stb r3,PACA_NAPSTATELOST(r13)
- blr
-
-/*
* Called from machine check handler for powersave wakeups.
* Low level machine check processing has already been done. Now just
* go through the wake up path to get everything in order.
@@ -537,9 +500,6 @@ pnv_powersave_wakeup:
ld r2, PACATOC(r13)
BEGIN_FTR_SECTION
-BEGIN_FTR_SECTION_NESTED(70)
- bl power9_dd1_recover_paca
-END_FTR_SECTION_NESTED_IFSET(CPU_FTR_POWER9_DD1, 70)
bl pnv_restore_hyp_resource_arch300
FTR_SECTION_ELSE
bl pnv_restore_hyp_resource_arch207
@@ -602,22 +562,12 @@ END_FTR_SECTION_IFCLR(CPU_FTR_POWER9_DD2_1)
LOAD_REG_ADDRBASE(r5,pnv_first_deep_stop_state)
ld r4,ADDROFF(pnv_first_deep_stop_state)(r5)
-BEGIN_FTR_SECTION_NESTED(71)
- /*
- * Assume that we are waking up from the state
- * same as the Requested Level (RL) in the PSSCR
- * which are Bits 60-63
- */
- ld r5,PACA_REQ_PSSCR(r13)
- rldicl r5,r5,0,60
-FTR_SECTION_ELSE_NESTED(71)
/*
* 0-3 bits correspond to Power-Saving Level Status
* which indicates the idle state we are waking up from
*/
mfspr r5, SPRN_PSSCR
rldicl r5,r5,4,60
-ALT_FTR_SECTION_END_NESTED_IFSET(CPU_FTR_POWER9_DD1, 71)
li r0, 0 /* clear requested_psscr to say we're awake */
std r0, PACA_REQ_PSSCR(r13)
cmpd cr4,r5,r4
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index 9ef4aea9fffe..27f0caee55ea 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -1250,17 +1250,9 @@ struct task_struct *__switch_to(struct task_struct *prev,
* mappings. If the new process has the foreign real address
* mappings, we must issue a cp_abort to clear any state and
* prevent snooping, corruption or a covert channel.
- *
- * DD1 allows paste into normal system memory so we do an
- * unpaired copy, rather than cp_abort, to clear the buffer,
- * since cp_abort is quite expensive.
*/
- if (current_thread_info()->task->thread.used_vas) {
+ if (current_thread_info()->task->thread.used_vas)
asm volatile(PPC_CP_ABORT);
- } else if (cpu_has_feature(CPU_FTR_POWER9_DD1)) {
- asm volatile(PPC_COPY(%0, %1)
- : : "r"(dummy_copy_buffer), "r"(0));
- }
}
#endif /* CONFIG_PPC_BOOK3S_64 */