From: Marc Zyngier <maz@xxxxxxxxxx>
commit dfe6d190f38fc5df5ff2614b463a5195a399c885 upstream.
It appears that we don't allow a vcpu to be restored in AArch32
System mode, as we *never* included it in the list of valid modes.
Just add it to the list of allowed modes.
Fixes: 0d854a60b1d7 ("arm64: KVM: enable initialization of a 32bit vcpu")
Cc: stable@xxxxxxxxxxxxxxx
Acked-by: Oliver Upton <oliver.upton@xxxxxxxxx>
Link: https://lore.kernel.org/r/20240524141956.1450304-3-maz@xxxxxxxxxx
Signed-off-by: Marc Zyngier <maz@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/arm64/kvm/guest.c | 1 +
1 file changed, 1 insertion(+)
--- a/arch/arm64/kvm/guest.c
+++ b/arch/arm64/kvm/guest.c
@@ -251,6 +251,7 @@ static int set_core_reg(struct kvm_vcpu
case PSR_AA32_MODE_SVC:
case PSR_AA32_MODE_ABT:
case PSR_AA32_MODE_UND:
+ case PSR_AA32_MODE_SYS:
if (!vcpu_el1_is_32bit(vcpu))
return -EINVAL;
break;
Patches currently in stable-queue which might be from maz@xxxxxxxxxx are
queue-6.9/kvm-arm64-fix-aarch32-register-narrowing-on-userspace-write.patch
queue-6.9/kvm-arm64-aarch32-fix-spurious-trapping-of-conditional-instructions.patch
queue-6.9/kvm-arm64-allow-aarch32-pstate.m-to-be-restored-as-system-mode.patch
