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KVM: arm64: nv: Honor MDCR_EL2.HLP

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Counters that fall in the hypervisor range (i.e. N >= HPMN) have a
separate control for enabling 64 bit overflow. Take it into account.

Reviewed-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20241025182354.3364124-17-oliver.upton@linux.dev
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
This commit is contained in:
Oliver Upton
2024-10-25 18:23:51 +00:00
parent fe827f9166
commit 16535d55e9
1 changed files with 5 additions and 1 deletions
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6
arch/arm64/kvm/pmu-emul.c
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@@ -89,7 +89,11 @@ static bool kvm_pmc_is_64bit(struct kvm_pmc *pmc)
static bool kvm_pmc_has_64bit_overflow(struct kvm_pmc *pmc)
{
u64 val = kvm_vcpu_read_pmcr(kvm_pmc_to_vcpu(pmc));
struct kvm_vcpu *vcpu = kvm_pmc_to_vcpu(pmc);
u64 val = kvm_vcpu_read_pmcr(vcpu);
if (kvm_pmu_counter_is_hyp(vcpu, pmc->idx))
return __vcpu_sys_reg(vcpu, MDCR_EL2) & MDCR_EL2_HLP;
return (pmc->idx < ARMV8_PMU_CYCLE_IDX && (val & ARMV8_PMU_PMCR_LP)) ||
(pmc->idx == ARMV8_PMU_CYCLE_IDX && (val & ARMV8_PMU_PMCR_LC));