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| author | Jordan Niethe <jniethe5@gmail.com> | 2023-09-14 06:05:56 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2023-09-14 15:04:24 +0300 |
| commit | 6de2e837babb411cfb3cdb570581c3a65576ddaf (patch) | |
| tree | f03f9bc408505793515a111e21dfe91b451ab561 /arch/powerpc/kvm/book3s_hv.h | |
| parent | ebc88ea7a6ad0ea349df9c765357d3aa4e662aa9 (diff) | |
| download | linux-6de2e837babb411cfb3cdb570581c3a65576ddaf.tar.xz | |
KVM: PPC: Book3S HV: Introduce low level MSR accessor
kvmppc_get_msr() and kvmppc_set_msr_fast() serve as accessors for the
MSR. However because the MSR is kept in the shared regs they include a
conditional check for kvmppc_shared_big_endian() and endian conversion.
Within the Book3S HV specific code there are direct reads and writes of
shregs::msr. In preparation for Nested APIv2 these accesses need to be
replaced with accessor functions so it is possible to extend their
behavior. However, using the kvmppc_get_msr() and kvmppc_set_msr_fast()
functions is undesirable because it would introduce a conditional branch
and endian conversion that is not currently present.
kvmppc_set_msr_hv() already exists, it is used for the
kvmppc_ops::set_msr callback.
Introduce a low level accessor __kvmppc_{s,g}et_msr_hv() that simply
gets and sets shregs::msr. This will be extend for Nested APIv2 support.
Signed-off-by: Jordan Niethe <jniethe5@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230914030600.16993-8-jniethe5@gmail.com
Diffstat (limited to 'arch/powerpc/kvm/book3s_hv.h')
| -rw-r--r-- | arch/powerpc/kvm/book3s_hv.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/book3s_hv.h b/arch/powerpc/kvm/book3s_hv.h index acd9a7a95bbf..95241764dfb4 100644 --- a/arch/powerpc/kvm/book3s_hv.h +++ b/arch/powerpc/kvm/book3s_hv.h @@ -51,6 +51,16 @@ void accumulate_time(struct kvm_vcpu *vcpu, struct kvmhv_tb_accumulator *next); #define end_timing(vcpu) do {} while (0) #endif +static inline void __kvmppc_set_msr_hv(struct kvm_vcpu *vcpu, u64 val) +{ + vcpu->arch.shregs.msr = val; +} + +static inline u64 __kvmppc_get_msr_hv(struct kvm_vcpu *vcpu) +{ + return vcpu->arch.shregs.msr; +} + #define KVMPPC_BOOK3S_HV_VCPU_ACCESSOR_SET(reg, size) \ static inline void kvmppc_set_##reg ##_hv(struct kvm_vcpu *vcpu, u##size val) \ { \ |