Keeping empty structure as the vcpu state initializer is slightly
wasteful: we only want to set pstate, and zero everything else.
Just do that.
Signed-off-by: Marc Zyngier <maz@xxxxxxxxxx>
---
arch/arm64/kvm/reset.c | 21 +++++++++------------
1 file changed, 9 insertions(+), 12 deletions(-)
diff --git a/arch/arm64/kvm/reset.c b/arch/arm64/kvm/reset.c
index 658f3a79617b..865c8aa670bc 100644
--- a/arch/arm64/kvm/reset.c
+++ b/arch/arm64/kvm/reset.c
@@ -36,15 +36,11 @@ static u32 kvm_ipa_limit;
/*
* ARMv8 Reset Values
*/
-static const struct kvm_regs default_regs_reset = {
- .regs.pstate = (PSR_MODE_EL1h | PSR_A_BIT | PSR_I_BIT |
- PSR_F_BIT | PSR_D_BIT),
-};
+#define VCPU_RESET_PSTATE_EL1 (PSR_MODE_EL1h | PSR_A_BIT | PSR_I_BIT | \
+ PSR_F_BIT | PSR_D_BIT)
-static const struct kvm_regs default_regs_reset32 = {
- .regs.pstate = (PSR_AA32_MODE_SVC | PSR_AA32_A_BIT |
- PSR_AA32_I_BIT | PSR_AA32_F_BIT),
-};
+#define VCPU_RESET_PSTATE_SVC (PSR_AA32_MODE_SVC | PSR_AA32_A_BIT | \
+ PSR_AA32_I_BIT | PSR_AA32_F_BIT)
static bool cpu_has_32bit_el1(void)
{
@@ -257,9 +253,9 @@ static int kvm_vcpu_enable_ptrauth(struct kvm_vcpu *vcpu)
*/
int kvm_reset_vcpu(struct kvm_vcpu *vcpu)
{
- const struct kvm_regs *cpu_reset;
int ret = -EINVAL;
bool loaded;
+ u32 pstate;
/* Reset PMU outside of the non-preemptible section */
kvm_pmu_vcpu_reset(vcpu);
@@ -290,16 +286,17 @@ int kvm_reset_vcpu(struct kvm_vcpu *vcpu)
if (test_bit(KVM_ARM_VCPU_EL1_32BIT, vcpu->arch.features)) {
if (!cpu_has_32bit_el1())
goto out;
- cpu_reset = &default_regs_reset32;
+ pstate = VCPU_RESET_PSTATE_SVC;
} else {
- cpu_reset = &default_regs_reset;
+ pstate = VCPU_RESET_PSTATE_EL1;
}
break;
}
/* Reset core registers */
- memcpy(vcpu_gp_regs(vcpu), cpu_reset, sizeof(*cpu_reset));
+ memset(vcpu_gp_regs(vcpu), 0, sizeof(*vcpu_gp_regs(vcpu)));
+ vcpu_gp_regs(vcpu)->regs.pstate = pstate;
/* Reset system registers */
kvm_reset_sys_regs(vcpu);
--
2.26.2
