[PATCH v4 34/40] KVM: arm64: Cleanup __activate_traps and __deactive_traps for VHE and non-VHE
Christoffer Dall
christoffer.dall at linaro.org
Thu Feb 15 13:03:26 PST 2018
To make the code more readable and to avoid the overhead of a function
call, let's get rid of a pair of the alternative function selectors and
explicitly call the VHE and non-VHE functions using the has_vhe() static
key based selector instead, telling the compiler to try to inline the
static function if it can.
Signed-off-by: Christoffer Dall <christoffer.dall at linaro.org>
---
arch/arm64/kvm/hyp/switch.c | 30 ++++++++++++++----------------
1 file changed, 14 insertions(+), 16 deletions(-)
diff --git a/arch/arm64/kvm/hyp/switch.c b/arch/arm64/kvm/hyp/switch.c
index 5e94955b89ea..0e54fe2aab1c 100644
--- a/arch/arm64/kvm/hyp/switch.c
+++ b/arch/arm64/kvm/hyp/switch.c
@@ -85,7 +85,7 @@ static void __hyp_text __deactivate_traps_common(void)
write_sysreg(0, pmuserenr_el0);
}
-static void __hyp_text __activate_traps_vhe(struct kvm_vcpu *vcpu)
+static inline void activate_traps_vhe(struct kvm_vcpu *vcpu)
{
u64 val;
@@ -97,7 +97,7 @@ static void __hyp_text __activate_traps_vhe(struct kvm_vcpu *vcpu)
write_sysreg(kvm_get_hyp_vector(), vbar_el1);
}
-static void __hyp_text __activate_traps_nvhe(struct kvm_vcpu *vcpu)
+static inline void __hyp_text __activate_traps_nvhe(struct kvm_vcpu *vcpu)
{
u64 val;
@@ -108,11 +108,7 @@ static void __hyp_text __activate_traps_nvhe(struct kvm_vcpu *vcpu)
write_sysreg(val, cptr_el2);
}
-static hyp_alternate_select(__activate_traps_arch,
- __activate_traps_nvhe, __activate_traps_vhe,
- ARM64_HAS_VIRT_HOST_EXTN);
-
-static void __hyp_text __activate_traps(struct kvm_vcpu *vcpu)
+static inline void __hyp_text __activate_traps(struct kvm_vcpu *vcpu)
{
u64 hcr = vcpu->arch.hcr_el2;
@@ -122,10 +118,13 @@ static void __hyp_text __activate_traps(struct kvm_vcpu *vcpu)
write_sysreg_s(vcpu->arch.vsesr_el2, SYS_VSESR_EL2);
__activate_traps_fpsimd32(vcpu);
- __activate_traps_arch()(vcpu);
+ if (has_vhe())
+ activate_traps_vhe(vcpu);
+ else
+ __activate_traps_nvhe(vcpu);
}
-static void __hyp_text __deactivate_traps_vhe(void)
+static inline void deactivate_traps_vhe(void)
{
extern char vectors[]; /* kernel exception vectors */
write_sysreg(HCR_HOST_VHE_FLAGS, hcr_el2);
@@ -133,7 +132,7 @@ static void __hyp_text __deactivate_traps_vhe(void)
write_sysreg(vectors, vbar_el1);
}
-static void __hyp_text __deactivate_traps_nvhe(void)
+static inline void __hyp_text __deactivate_traps_nvhe(void)
{
u64 mdcr_el2 = read_sysreg(mdcr_el2);
@@ -147,11 +146,7 @@ static void __hyp_text __deactivate_traps_nvhe(void)
write_sysreg(CPTR_EL2_DEFAULT, cptr_el2);
}
-static hyp_alternate_select(__deactivate_traps_arch,
- __deactivate_traps_nvhe, __deactivate_traps_vhe,
- ARM64_HAS_VIRT_HOST_EXTN);
-
-static void __hyp_text __deactivate_traps(struct kvm_vcpu *vcpu)
+static inline void __hyp_text __deactivate_traps(struct kvm_vcpu *vcpu)
{
/*
* If we pended a virtual abort, preserve it until it gets
@@ -162,7 +157,10 @@ static void __hyp_text __deactivate_traps(struct kvm_vcpu *vcpu)
if (vcpu->arch.hcr_el2 & HCR_VSE)
vcpu->arch.hcr_el2 = read_sysreg(hcr_el2);
- __deactivate_traps_arch()();
+ if (has_vhe())
+ deactivate_traps_vhe();
+ else
+ __deactivate_traps_nvhe();
}
void activate_traps_vhe_load(struct kvm_vcpu *vcpu)
--
2.14.2
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