diff options
| author | Reiji Watanabe <reijiw@google.com> | 2023-10-20 21:40:43 +0000 |
|---|---|---|
| committer | Oliver Upton <oliver.upton@linux.dev> | 2023-10-24 22:59:29 +0000 |
| commit | 57fc267f1b5caa56dfb46f60e20e673cbc4cc4a8 (patch) | |
| tree | 777d71453467714f91752cd99f9236177e745407 /arch/arm64/kvm/sys_regs.c | |
| parent | 427733579744ef22ee6d0da9907560d79d937458 (diff) | |
| download | linux-57fc267f1b5caa56dfb46f60e20e673cbc4cc4a8.tar.gz linux-57fc267f1b5caa56dfb46f60e20e673cbc4cc4a8.tar.bz2 linux-57fc267f1b5caa56dfb46f60e20e673cbc4cc4a8.zip | |
KVM: arm64: PMU: Add a helper to read a vCPU's PMCR_EL0
Add a helper to read a vCPU's PMCR_EL0, and use it whenever KVM
reads a vCPU's PMCR_EL0.
Currently, the PMCR_EL0 value is tracked per vCPU. The following
patches will make (only) PMCR_EL0.N track per guest. Having the
new helper will be useful to combine the PMCR_EL0.N field
(tracked per guest) and the other fields (tracked per vCPU)
to provide the value of PMCR_EL0.
No functional change intended.
Reviewed-by: Sebastian Ott <sebott@redhat.com>
Signed-off-by: Reiji Watanabe <reijiw@google.com>
Signed-off-by: Raghavendra Rao Ananta <rananta@google.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20231020214053.2144305-4-rananta@google.com
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Diffstat (limited to 'arch/arm64/kvm/sys_regs.c')
| -rw-r--r-- | arch/arm64/kvm/sys_regs.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index e92ec810d449..d490cd903e2b 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -822,7 +822,7 @@ static bool access_pmcr(struct kvm_vcpu *vcpu, struct sys_reg_params *p, * Only update writeable bits of PMCR (continuing into * kvm_pmu_handle_pmcr() as well) */ - val = __vcpu_sys_reg(vcpu, PMCR_EL0); + val = kvm_vcpu_read_pmcr(vcpu); val &= ~ARMV8_PMU_PMCR_MASK; val |= p->regval & ARMV8_PMU_PMCR_MASK; if (!kvm_supports_32bit_el0()) @@ -830,7 +830,7 @@ static bool access_pmcr(struct kvm_vcpu *vcpu, struct sys_reg_params *p, kvm_pmu_handle_pmcr(vcpu, val); } else { /* PMCR.P & PMCR.C are RAZ */ - val = __vcpu_sys_reg(vcpu, PMCR_EL0) + val = kvm_vcpu_read_pmcr(vcpu) & ~(ARMV8_PMU_PMCR_P | ARMV8_PMU_PMCR_C); p->regval = val; } @@ -879,7 +879,7 @@ static bool pmu_counter_idx_valid(struct kvm_vcpu *vcpu, u64 idx) { u64 pmcr, val; - pmcr = __vcpu_sys_reg(vcpu, PMCR_EL0); + pmcr = kvm_vcpu_read_pmcr(vcpu); val = (pmcr >> ARMV8_PMU_PMCR_N_SHIFT) & ARMV8_PMU_PMCR_N_MASK; if (idx >= val && idx != ARMV8_PMU_CYCLE_IDX) { kvm_inject_undefined(vcpu); |