diff options
| author | Nicholas Piggin <npiggin@gmail.com> | 2021-11-23 19:51:55 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-11-24 21:08:58 +1100 |
| commit | a1a19e1154e4e9c6c1136474cb040657b1c17817 (patch) | |
| tree | e28f6b021e6c4eb1fc3bdea755a5ab46c313e62c /arch/powerpc/kvm/book3s_hv.c | |
| parent | b1adcf57ceca7eab9bfdafc754802e05e634bfcc (diff) | |
KVM: PPC: Book3S HV: CTRL SPR does not require read-modify-write
Processors that support KVM HV do not require read-modify-write of
the CTRL SPR to set/clear their thread's runlatch. Just write 1 or 0
to it.
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/20211123095231.1036501-18-npiggin@gmail.com
Diffstat (limited to 'arch/powerpc/kvm/book3s_hv.c')
| -rw-r--r-- | arch/powerpc/kvm/book3s_hv.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c index bbaf018dcb67..e4fb36871ce4 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -4071,7 +4071,7 @@ static void load_spr_state(struct kvm_vcpu *vcpu) */ if (!(vcpu->arch.ctrl & 1)) - mtspr(SPRN_CTRLT, mfspr(SPRN_CTRLF) & ~1); + mtspr(SPRN_CTRLT, 0); } static void store_spr_state(struct kvm_vcpu *vcpu) |