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KVM: arm64: nv: Allow userspace to set PSR_MODE_EL2x

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We were not allowing userspace to set a more privileged mode for the VCPU
than EL1, but we should allow this when nested virtualization is enabled
for the VCPU.

Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230209175820.1939006-6-maz@kernel.org
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
This commit is contained in:
Christoffer Dall
2023-02-09 17:58:07 +00:00
committed by Oliver Upton
parent 2fb32357ae
commit 1d05d51bac
1 changed files with 6 additions and 0 deletions
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6
arch/arm64/kvm/guest.c
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@@ -24,6 +24,7 @@
#include <asm/fpsimd.h>
#include <asm/kvm.h>
#include <asm/kvm_emulate.h>
#include <asm/kvm_nested.h>
#include <asm/sigcontext.h>
#include "trace.h"
@@ -253,6 +254,11 @@ static int set_core_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg)
if (!vcpu_el1_is_32bit(vcpu))
return -EINVAL;
break;
case PSR_MODE_EL2h:
case PSR_MODE_EL2t:
if (!vcpu_has_nv(vcpu))
return -EINVAL;
fallthrough;
case PSR_MODE_EL0t:
case PSR_MODE_EL1t:
case PSR_MODE_EL1h: