5.4-stable review patch. If anyone has any objections, please let me know.
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From: Marc Zyngier maz@kernel.org
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@vger.kernel.org Acked-by: Oliver Upton oliver.upton@linux.dev Link: https://lore.kernel.org/r/20240524141956.1450304-3-maz@kernel.org Signed-off-by: Marc Zyngier maz@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/arm64/kvm/guest.c | 1 + 1 file changed, 1 insertion(+)
--- a/arch/arm64/kvm/guest.c +++ b/arch/arm64/kvm/guest.c @@ -186,6 +186,7 @@ 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;