diff options
| author | Nicholas Piggin <npiggin@gmail.com> | 2021-11-23 12:51:47 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-11-24 13:08:57 +0300 |
| commit | 46f9caf1a246a5c0622fa8cc7e673658e925f97e (patch) | |
| tree | 588a28905c70adcd36e135af702a8e4293b20288 /arch/powerpc/kvm/book3s_hv_p9_entry.c | |
| parent | eacc818864bb01828280f4d64334c4e5ae6a4daf (diff) | |
| download | linux-46f9caf1a246a5c0622fa8cc7e673658e925f97e.tar.xz | |
powerpc/64s: Keep AMOR SPR a constant ~0 at runtime
This register controls supervisor SPR modifications, and as such is only
relevant for KVM. KVM always sets AMOR to ~0 on guest entry, and never
restores it coming back out to the host, so it can be kept constant and
avoid the mtSPR in KVM guest entry.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Fabiano Rosas <farosas@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211123095231.1036501-10-npiggin@gmail.com
Diffstat (limited to 'arch/powerpc/kvm/book3s_hv_p9_entry.c')
| -rw-r--r-- | arch/powerpc/kvm/book3s_hv_p9_entry.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/powerpc/kvm/book3s_hv_p9_entry.c b/arch/powerpc/kvm/book3s_hv_p9_entry.c index bd8cf0a65ce8..a7f63082b4e3 100644 --- a/arch/powerpc/kvm/book3s_hv_p9_entry.c +++ b/arch/powerpc/kvm/book3s_hv_p9_entry.c @@ -286,8 +286,6 @@ int kvmhv_vcpu_entry_p9(struct kvm_vcpu *vcpu, u64 time_limit, unsigned long lpc mtspr(SPRN_SPRG2, vcpu->arch.shregs.sprg2); mtspr(SPRN_SPRG3, vcpu->arch.shregs.sprg3); - mtspr(SPRN_AMOR, ~0UL); - local_paca->kvm_hstate.in_guest = KVM_GUEST_MODE_HV_P9; /* |