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Diffstat (limited to 'arch/arm64/kvm/handle_exit.c')
-rw-r--r--arch/arm64/kvm/handle_exit.c32
1 files changed, 3 insertions, 29 deletions
diff --git a/arch/arm64/kvm/handle_exit.c b/arch/arm64/kvm/handle_exit.c
index eb194696ef62..5a02d4c90559 100644
--- a/arch/arm64/kvm/handle_exit.c
+++ b/arch/arm64/kvm/handle_exit.c
@@ -162,40 +162,14 @@ static int handle_sve(struct kvm_vcpu *vcpu, struct kvm_run *run)
return 1;
}
-#define __ptrauth_save_key(regs, key) \
-({ \
- regs[key ## KEYLO_EL1] = read_sysreg_s(SYS_ ## key ## KEYLO_EL1); \
- regs[key ## KEYHI_EL1] = read_sysreg_s(SYS_ ## key ## KEYHI_EL1); \
-})
-
-/*
- * Handle the guest trying to use a ptrauth instruction, or trying to access a
- * ptrauth register.
- */
-void kvm_arm_vcpu_ptrauth_trap(struct kvm_vcpu *vcpu)
-{
- struct kvm_cpu_context *ctxt;
-
- if (vcpu_has_ptrauth(vcpu)) {
- vcpu_ptrauth_enable(vcpu);
- ctxt = vcpu->arch.host_cpu_context;
- __ptrauth_save_key(ctxt->sys_regs, APIA);
- __ptrauth_save_key(ctxt->sys_regs, APIB);
- __ptrauth_save_key(ctxt->sys_regs, APDA);
- __ptrauth_save_key(ctxt->sys_regs, APDB);
- __ptrauth_save_key(ctxt->sys_regs, APGA);
- } else {
- kvm_inject_undefined(vcpu);
- }
-}
-
/*
* Guest usage of a ptrauth instruction (which the guest EL1 did not turn into
- * a NOP).
+ * a NOP). If we get here, it is that we didn't fixup ptrauth on exit, and all
+ * that we can do is give the guest an UNDEF.
*/
static int kvm_handle_ptrauth(struct kvm_vcpu *vcpu, struct kvm_run *run)
{
- kvm_arm_vcpu_ptrauth_trap(vcpu);
+ kvm_inject_undefined(vcpu);
return 1;
}