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KVM: arm64: Allow AArch32 PSTATE.M to be restored as System mode

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commit dfe6d190f3 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: 0d854a60b1 ("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>
This commit is contained in:
Marc Zyngier
2024-05-24 15:19:55 +01:00
committed by Greg Kroah-Hartman
parent 4f902f03ef
commit 5b12ce0b6f
1 changed files with 1 additions and 0 deletions
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arch/arm64/kvm/guest.c
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@ -250,6 +250,7 @@ static int set_core_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg)
case PSR_AA32_MODE_SVC: case PSR_AA32_MODE_SVC:
case PSR_AA32_MODE_ABT: case PSR_AA32_MODE_ABT:
case PSR_AA32_MODE_UND: case PSR_AA32_MODE_UND:
case PSR_AA32_MODE_SYS:
if (!vcpu_el1_is_32bit(vcpu)) if (!vcpu_el1_is_32bit(vcpu))
return -EINVAL; return -EINVAL;
break; break;