diff options
| author | Marc Zyngier <maz@kernel.org> | 2024-04-19 11:29:28 +0100 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2024-04-20 12:42:51 +0100 |
| commit | 4cc3f31914d6df9dba8825db933d19c60028f5a8 (patch) | |
| tree | c9e041f845f8bf99b8a069e102d079c328415c2d | |
| parent | dd0717a998f77f449c70bee82626cbf9913fe78d (diff) | |
KVM: arm64: nv: Honor HFGITR_EL2.ERET being set
If the L1 hypervisor decides to trap ERETs while running L2,
make sure we don't try to emulate it, just like we wouldn't
if it had its NV bit set.
The exception will be reinjected from the core handler.
Reviewed-by: Joey Gouly <joey.gouly@arm.com>
Reviewed-by: Oliver Upton <oliver.upton@linux.dev>
Link: https://lore.kernel.org/r/20240419102935.1935571-9-maz@kernel.org
Signed-off-by: Marc Zyngier <maz@kernel.org>
| -rw-r--r-- | arch/arm64/kvm/hyp/vhe/switch.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/arm64/kvm/hyp/vhe/switch.c b/arch/arm64/kvm/hyp/vhe/switch.c index 390c7d99f6170..26395171621ba 100644 --- a/arch/arm64/kvm/hyp/vhe/switch.c +++ b/arch/arm64/kvm/hyp/vhe/switch.c @@ -220,7 +220,8 @@ static bool kvm_hyp_handle_eret(struct kvm_vcpu *vcpu, u64 *exit_code) * Unless the trap has to be forwarded further down the line, * of course... */ - if (__vcpu_sys_reg(vcpu, HCR_EL2) & HCR_NV) + if ((__vcpu_sys_reg(vcpu, HCR_EL2) & HCR_NV) || + (__vcpu_sys_reg(vcpu, HFGITR_EL2) & HFGITR_EL2_ERET)) return false; spsr = read_sysreg_el1(SYS_SPSR); |