diff options
| author | Alexander Graf <agraf@suse.de> | 2014-04-29 17:54:40 +0200 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2014-05-30 14:26:23 +0200 |
| commit | 9916d57e64a49d85bcffe272478f869b8fe1583a (patch) | |
| tree | 2afe3777d8c4564ed6b99d74845126f4ae5a031c /arch/powerpc/kvm/book3s_pr.c | |
| parent | 2e23f544135e7b5fc2f0bcb6fa935c4b4f5058b2 (diff) | |
KVM: PPC: Book3S PR: Expose TM registers
POWER8 introduces transactional memory which brings along a number of new
registers and MSR bits.
Implementing all of those is a pretty big headache, so for now let's at least
emulate enough to make Linux's context switching code happy.
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'arch/powerpc/kvm/book3s_pr.c')
| -rw-r--r-- | arch/powerpc/kvm/book3s_pr.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/arch/powerpc/kvm/book3s_pr.c b/arch/powerpc/kvm/book3s_pr.c index 7d27a9518f07..23367a7e44c3 100644 --- a/arch/powerpc/kvm/book3s_pr.c +++ b/arch/powerpc/kvm/book3s_pr.c @@ -794,9 +794,27 @@ static void kvmppc_emulate_fac(struct kvm_vcpu *vcpu, ulong fac) /* Enable facilities (TAR, EBB, DSCR) for the guest */ static int kvmppc_handle_fac(struct kvm_vcpu *vcpu, ulong fac) { + bool guest_fac_enabled; BUG_ON(!cpu_has_feature(CPU_FTR_ARCH_207S)); - if (!(vcpu->arch.fscr & (1ULL << fac))) { + /* + * Not every facility is enabled by FSCR bits, check whether the + * guest has this facility enabled at all. + */ + switch (fac) { + case FSCR_TAR_LG: + case FSCR_EBB_LG: + guest_fac_enabled = (vcpu->arch.fscr & (1ULL << fac)); + break; + case FSCR_TM_LG: + guest_fac_enabled = kvmppc_get_msr(vcpu) & MSR_TM; + break; + default: + guest_fac_enabled = false; + break; + } + + if (!guest_fac_enabled) { /* Facility not enabled by the guest */ kvmppc_trigger_fac_interrupt(vcpu, fac); return RESUME_GUEST; |