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/kvm/book3s_hv.c | |
| parent | bd3048b80caace9cf0ae9ad22b2fbb8333b44a97 (diff) | |
| download | lwn-5557ae0ec77c2b4b5bbce2883c0603054ab66e68.tar.gz lwn-5557ae0ec77c2b4b5bbce2883c0603054ab66e68.zip | |
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/kvm/book3s_hv.c')
| -rw-r--r-- | arch/powerpc/kvm/book3s_hv.c | 16 |
1 files changed, 15 insertions, 1 deletions
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); |