diff options
| author | Michael Ellerman <mpe@ellerman.id.au> | 2014-03-17 20:48:23 +1100 |
|---|---|---|
| committer | Eli Qiao <taget@linux.vnet.ibm.com> | 2014-03-18 10:23:10 +0800 |
| commit | 58cb4bb83ee7b8974b49480b5b5457c1204a518e (patch) | |
| tree | abcd27fb69591d3edcc513d9b05fd248b5d47308 | |
| parent | becd0834f5ee3879dae0cc4074bcc7d5b8766122 (diff) | |
| download | powerkvm-58cb4bb83ee7b8974b49480b5b5457c1204a518e.tar.gz | |
powerpc: Add a cpu feature CPU_FTR_PMAO_BUG
Some power8 revisions have a hardware bug where we can lose a
Performance Monitor (PMU) exception under certain circumstances.
We will be adding a workaround for this case, see the next commit for
details. The observed behaviour is that writing PMAO doesn't cause an
exception as we would expect, hence the name of the feature.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
| -rw-r--r-- | arch/powerpc/include/asm/cputable.h | 6 | ||||
| -rw-r--r-- | arch/powerpc/kernel/cputable.c | 2 |
2 files changed, 5 insertions, 3 deletions
diff --git a/arch/powerpc/include/asm/cputable.h b/arch/powerpc/include/asm/cputable.h index d76e47bb1ffec..8b27acc8ea84a 100644 --- a/arch/powerpc/include/asm/cputable.h +++ b/arch/powerpc/include/asm/cputable.h @@ -189,6 +189,7 @@ extern const char *powerpc_base_platform; #define CPU_FTR_HAS_PPR LONG_ASM_CONST(0x0200000000000000) #define CPU_FTR_DAWR LONG_ASM_CONST(0x0400000000000000) #define CPU_FTR_DABRX LONG_ASM_CONST(0x0800000000000000) +#define CPU_FTR_PMAO_BUG LONG_ASM_CONST(0x1000000000000000) #ifndef __ASSEMBLY__ @@ -440,6 +441,7 @@ extern const char *powerpc_base_platform; CPU_FTR_ICSWX | CPU_FTR_CFAR | CPU_FTR_HVMODE | CPU_FTR_VMX_COPY | \ CPU_FTR_DBELL | CPU_FTR_HAS_PPR | CPU_FTR_DAWR | \ CPU_FTR_ARCH_207S | CPU_FTR_TM_COMP) +#define CPU_FTRS_POWER8E (CPU_FTRS_POWER8 | CPU_FTR_PMAO_BUG) #define CPU_FTRS_CELL (CPU_FTR_USE_TB | CPU_FTR_LWSYNC | \ CPU_FTR_PPCAS_ARCH_V2 | CPU_FTR_CTRL | \ CPU_FTR_ALTIVEC_COMP | CPU_FTR_MMCRA | CPU_FTR_SMT | \ @@ -461,8 +463,8 @@ extern const char *powerpc_base_platform; #define CPU_FTRS_POSSIBLE \ (CPU_FTRS_POWER3 | CPU_FTRS_RS64 | CPU_FTRS_POWER4 | \ CPU_FTRS_PPC970 | CPU_FTRS_POWER5 | CPU_FTRS_POWER6 | \ - CPU_FTRS_POWER7 | CPU_FTRS_POWER8 | CPU_FTRS_CELL | \ - CPU_FTRS_PA6T | CPU_FTR_VSX) + CPU_FTRS_POWER7 | CPU_FTRS_POWER8E | CPU_FTRS_POWER8 | \ + CPU_FTRS_CELL | CPU_FTRS_PA6T | CPU_FTR_VSX) #endif #else enum { diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c index 019535868a834..7d46c0a2ecadb 100644 --- a/arch/powerpc/kernel/cputable.c +++ b/arch/powerpc/kernel/cputable.c @@ -510,7 +510,7 @@ static struct cpu_spec __initdata cpu_specs[] = { .pvr_mask = 0xffff0000, .pvr_value = 0x004b0000, .cpu_name = "POWER8E (raw)", - .cpu_features = CPU_FTRS_POWER8, + .cpu_features = CPU_FTRS_POWER8E, .cpu_user_features = COMMON_USER_POWER8, .cpu_user_features2 = COMMON_USER2_POWER8, .mmu_features = MMU_FTRS_POWER8, |