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authorMarc Zyngier <marc.zyngier@arm.com>2017-03-27 17:03:37 +0100
committerChristoffer Dall <cdall@linaro.org>2017-04-09 07:49:12 -0700
commit6c0070366deadd16503853708a0e32a612b7f628 (patch)
treebde0da9077edcd13e7ef8bfc09c53c9c1462e61a /arch/arm64/kvm
parentKVM: arm/arm64: vgic: Improve sync_hwstate performance (diff)
downloadlinux-dev-6c0070366deadd16503853708a0e32a612b7f628.tar.xz
linux-dev-6c0070366deadd16503853708a0e32a612b7f628.zip
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>
Diffstat (limited to '')
-rw-r--r--arch/arm64/kvm/sys_regs.c25
1 files changed, 11 insertions, 14 deletions
diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index 0e26f8c2b56f..036efc971e89 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -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_write_swinc_el0_disabled(struct kvm_vcpu *vcpu)
+static bool pmu_access_el0_disabled(struct kvm_vcpu *vcpu)
{
- u64 reg = vcpu_sys_reg(vcpu, PMUSERENR_EL0);
+ return check_pmu_access_disabled(vcpu, ARMV8_PMU_USERENR_EN);
+}
- return !((reg & (ARMV8_PMU_USERENR_SW | ARMV8_PMU_USERENR_EN))
- || vcpu_mode_priv(vcpu));
+static bool pmu_write_swinc_el0_disabled(struct kvm_vcpu *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,