Track the baseline guest value for cptr_el2 in struct
kvm_vcpu_arch, similar to the other registers that control traps.
Use this value when setting cptr_el2 for the guest.
Currently this value is unchanged (CPTR_EL2_DEFAULT), but future
patches will set trapping bits based on features supported for
the guest.
No functional change intended.
Signed-off-by: Fuad Tabba
---
arch/arm64/include/asm/kvm_host.h | 1 +
arch/arm64/kvm/arm.c | 1 +
arch/arm64/kvm/hyp/nvhe/switch.c | 2 +-
3 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/include/asm/kvm_host.h
b/arch/arm64/include/asm/kvm_host.h
index 76462c6a91ee..ac67d5699c68 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -290,6 +290,7 @@ struct kvm_vcpu_arch {
/* Values of trap registers for the guest. */
u64 hcr_el2;
u64 mdcr_el2;
+ u64 cptr_el2;
/* Values of trap registers for the host before guest entry. */
u64 mdcr_el2_host;
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index e9a2b8f27792..14b12f2c08c0 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -1104,6 +1104,7 @@ static int kvm_arch_vcpu_ioctl_vcpu_init(struct kvm_vcpu
*vcpu,
}
vcpu_reset_hcr(vcpu);
+ vcpu->arch.cptr_el2 = CPTR_EL2_DEFAULT;
/*
* Handle the "start in power-off" case.
diff --git a/arch/arm64/kvm/hyp/nvhe/switch.c b/arch/arm64/kvm/hyp/nvhe/switch.c
index 1778593a08a9..86f3d6482935 100644
--- a/arch/arm64/kvm/hyp/nvhe/switch.c
+++ b/arch/arm64/kvm/hyp/nvhe/switch.c
@@ -41,7 +41,7 @@ static void __activate_traps(struct kvm_vcpu *vcpu)
___activate_traps(vcpu);
__activate_traps_common(vcpu);
- val = CPTR_EL2_DEFAULT;
+ val = vcpu->arch.cptr_el2;
val |= CPTR_EL2_TTA | CPTR_EL2_TAM;
if (!update_fp_enabled(vcpu)) {
val |= CPTR_EL2_TFP | CPTR_EL2_TZ;
--
2.32.0.402.g57bb445576-goog
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