[PATCH 70/89] KVM: arm64: Refactor kvm_vcpu_enable_ptrauth() for hyp use

[Will Deacon]

From: Fuad Tabba <tabba at google.com>

Move kvm_vcpu_enable_ptrauth() to a shared header to be used by
hyp in protected mode.

No functional change intended.

Signed-off-by: Fuad Tabba <tabba at google.com>
---
 arch/arm64/include/asm/kvm_emulate.h | 16 ++++++++++++++++
 arch/arm64/kvm/reset.c               | 16 ----------------
 2 files changed, 16 insertions(+), 16 deletions(-)

diff --git a/arch/arm64/include/asm/kvm_emulate.h b/arch/arm64/include/asm/kvm_emulate.h
index d62405ce3e6d..bb56aff4de95 100644
--- a/arch/arm64/include/asm/kvm_emulate.h
+++ b/arch/arm64/include/asm/kvm_emulate.h
@@ -43,6 +43,22 @@ void kvm_inject_pabt(struct kvm_vcpu *vcpu, unsigned long addr);
 
 void kvm_vcpu_wfi(struct kvm_vcpu *vcpu);
 
+static inline int kvm_vcpu_enable_ptrauth(struct kvm_vcpu *vcpu)
+{
+	/*
+	 * For now make sure that both address/generic pointer authentication
+	 * features are requested by the userspace together and the system
+	 * supports these capabilities.
+	 */
+	if (!test_bit(KVM_ARM_VCPU_PTRAUTH_ADDRESS, vcpu->arch.features) ||
+	    !test_bit(KVM_ARM_VCPU_PTRAUTH_GENERIC, vcpu->arch.features) ||
+	    !system_has_full_ptr_auth())
+		return -EINVAL;
+
+	vcpu->arch.flags |= KVM_ARM64_GUEST_HAS_PTRAUTH;
+	return 0;
+}
+
 static __always_inline bool vcpu_el1_is_32bit(struct kvm_vcpu *vcpu)
 {
 	return !(vcpu->arch.hcr_el2 & HCR_RW);
diff --git a/arch/arm64/kvm/reset.c b/arch/arm64/kvm/reset.c
index c07265ea72fd..cc25f540962b 100644
--- a/arch/arm64/kvm/reset.c
+++ b/arch/arm64/kvm/reset.c
@@ -165,22 +165,6 @@ static void kvm_vcpu_reset_sve(struct kvm_vcpu *vcpu)
 		memset(vcpu->arch.sve_state, 0, vcpu_sve_state_size(vcpu));
 }
 
-static int kvm_vcpu_enable_ptrauth(struct kvm_vcpu *vcpu)
-{
-	/*
-	 * For now make sure that both address/generic pointer authentication
-	 * features are requested by the userspace together and the system
-	 * supports these capabilities.
-	 */
-	if (!test_bit(KVM_ARM_VCPU_PTRAUTH_ADDRESS, vcpu->arch.features) ||
-	    !test_bit(KVM_ARM_VCPU_PTRAUTH_GENERIC, vcpu->arch.features) ||
-	    !system_has_full_ptr_auth())
-		return -EINVAL;
-
-	vcpu->arch.flags |= KVM_ARM64_GUEST_HAS_PTRAUTH;
-	return 0;
-}
-
 static bool vcpu_allowed_register_width(struct kvm_vcpu *vcpu)
 {
 	struct kvm_vcpu *tmp;
-- 
2.36.1.124.g0e6072fb45-goog