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arm64: KVM: PMU: Refactor pmu_*_el0_disabled 

There is a lot of duplication in the pmu_*_el0_disabled helpers,
and as we're going to modify them shortly, let's move all the
common stuff in a single function.

No functional change.

Reviewed-by: Christoffer Dall <cdall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <cdall@linaro.org>
This commit is contained in:
Marc Zyngier 2017-03-27 17:03:37 +01:00 committed by Christoffer Dall
parent 8ac76ef4b5
commit 6c0070366d
1 changed files with 11 additions and 14 deletions
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25
arch/arm64/kvm/sys_regs.c
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@ -460,35 +460,32 @@ static void reset_pmcr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *r)
vcpu_sys_reg(vcpu, PMCR_EL0) = val;
}
static bool pmu_access_el0_disabled(struct kvm_vcpu *vcpu)
static bool check_pmu_access_disabled(struct kvm_vcpu *vcpu, u64 flags)
{
u64 reg = vcpu_sys_reg(vcpu, PMUSERENR_EL0);
bool enabled = (reg & flags) || vcpu_mode_priv(vcpu);
return !((reg & ARMV8_PMU_USERENR_EN) || vcpu_mode_priv(vcpu));
return !enabled;
}
static bool pmu_access_el0_disabled(struct kvm_vcpu *vcpu)
{
return check_pmu_access_disabled(vcpu, ARMV8_PMU_USERENR_EN);
}
static bool pmu_write_swinc_el0_disabled(struct kvm_vcpu *vcpu)
{
u64 reg = vcpu_sys_reg(vcpu, PMUSERENR_EL0);
return !((reg & (ARMV8_PMU_USERENR_SW | ARMV8_PMU_USERENR_EN))
|| vcpu_mode_priv(vcpu));
return check_pmu_access_disabled(vcpu, ARMV8_PMU_USERENR_SW | ARMV8_PMU_USERENR_EN);
}
static bool pmu_access_cycle_counter_el0_disabled(struct kvm_vcpu *vcpu)
{
u64 reg = vcpu_sys_reg(vcpu, PMUSERENR_EL0);
return !((reg & (ARMV8_PMU_USERENR_CR | ARMV8_PMU_USERENR_EN))
|| vcpu_mode_priv(vcpu));
return check_pmu_access_disabled(vcpu, ARMV8_PMU_USERENR_CR | ARMV8_PMU_USERENR_EN);
}
static bool pmu_access_event_counter_el0_disabled(struct kvm_vcpu *vcpu)
{
u64 reg = vcpu_sys_reg(vcpu, PMUSERENR_EL0);
return !((reg & (ARMV8_PMU_USERENR_ER | ARMV8_PMU_USERENR_EN))
|| vcpu_mode_priv(vcpu));
return check_pmu_access_disabled(vcpu, ARMV8_PMU_USERENR_ER | ARMV8_PMU_USERENR_EN);
}
static bool access_pmcr(struct kvm_vcpu *vcpu, struct sys_reg_params *p,