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| author | Nicholas Piggin <npiggin@gmail.com> | 2021-11-23 12:52:23 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-11-24 13:09:02 +0300 |
| commit | b49c65c5f9f1dac4ef1764578ad55bacf526eb38 (patch) | |
| tree | 2364d675b568228d7fe3c23c5b93a13b1c80f622 /arch/powerpc/include/asm/kvm_book3s_64.h | |
| parent | 46dea77f790c1e7ab2e9f7452e34de0dc5da9b13 (diff) | |
| download | linux-b49c65c5f9f1dac4ef1764578ad55bacf526eb38.tar.xz | |
KVM: PPC: Book3S HV P9: Improve mfmsr performance on entry
Rearrange the MSR saving on entry so it does not follow the mtmsrd to
disable interrupts, avoiding a possible RAW scoreboard stall.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211123095231.1036501-46-npiggin@gmail.com
Diffstat (limited to 'arch/powerpc/include/asm/kvm_book3s_64.h')
| -rw-r--r-- | arch/powerpc/include/asm/kvm_book3s_64.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/kvm_book3s_64.h b/arch/powerpc/include/asm/kvm_book3s_64.h index 0a319ed9c2fd..96f0fda50a07 100644 --- a/arch/powerpc/include/asm/kvm_book3s_64.h +++ b/arch/powerpc/include/asm/kvm_book3s_64.h @@ -154,6 +154,8 @@ static inline bool kvmhv_vcpu_is_radix(struct kvm_vcpu *vcpu) return radix; } +unsigned long kvmppc_msr_hard_disable_set_facilities(struct kvm_vcpu *vcpu, unsigned long msr); + int kvmhv_vcpu_entry_p9(struct kvm_vcpu *vcpu, u64 time_limit, unsigned long lpcr, u64 *tb); #define KVM_DEFAULT_HPT_ORDER 24 /* 16MB HPT by default */ |