diff options
| author | Paul Mackerras <paulus@samba.org> | 2014-01-08 21:25:24 +1100 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2014-01-27 16:01:06 +0100 |
| commit | 5557ae0ec77c2b4b5bbce2883c0603054ab66e68 (patch) | |
| tree | f9b858e122722953e0b945772a6b2cd7035c981b /arch/powerpc | |
| parent | bd3048b80caace9cf0ae9ad22b2fbb8333b44a97 (diff) | |
KVM: PPC: Book3S HV: Implement architecture compatibility modes for POWER8
This allows us to select architecture 2.05 (POWER6) or 2.06 (POWER7)
compatibility modes on a POWER8 processor. (Note that transactional
memory is disabled for usermode if either or both of the PCR_TM_DIS
and PCR_ARCH_206 bits are set.)
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/include/asm/reg.h | 2 | ||||
| -rw-r--r-- | arch/powerpc/kvm/book3s_hv.c | 16 |
2 files changed, 17 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h index 2f41e6475648..5a9983147683 100644 --- a/arch/powerpc/include/asm/reg.h +++ b/arch/powerpc/include/asm/reg.h @@ -329,6 +329,8 @@ #define SPRN_PCR 0x152 /* Processor compatibility register */ #define PCR_VEC_DIS (1ul << (63-0)) /* Vec. disable (bit NA since POWER8) */ #define PCR_VSX_DIS (1ul << (63-1)) /* VSX disable (bit NA since POWER8) */ +#define PCR_TM_DIS (1ul << (63-2)) /* Trans. memory disable (POWER8) */ +#define PCR_ARCH_206 0x4 /* Architecture 2.06 */ #define PCR_ARCH_205 0x2 /* Architecture 2.05 */ #define SPRN_HEIR 0x153 /* Hypervisor Emulated Instruction Register */ #define SPRN_TLBINDEXR 0x154 /* P7 TLB control register */ diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c index 1bf681e8a05f..1e9f4b45432b 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -184,14 +184,28 @@ int kvmppc_set_arch_compat(struct kvm_vcpu *vcpu, u32 arch_compat) switch (arch_compat) { case PVR_ARCH_205: - pcr = PCR_ARCH_205; + /* + * If an arch bit is set in PCR, all the defined + * higher-order arch bits also have to be set. + */ + pcr = PCR_ARCH_206 | PCR_ARCH_205; break; case PVR_ARCH_206: case PVR_ARCH_206p: + pcr = PCR_ARCH_206; + break; + case PVR_ARCH_207: break; default: return -EINVAL; } + + if (!cpu_has_feature(CPU_FTR_ARCH_207S)) { + /* POWER7 can't emulate POWER8 */ + if (!(pcr & PCR_ARCH_206)) + return -EINVAL; + pcr &= ~PCR_ARCH_206; + } } spin_lock(&vc->lock); |