diff options
| -rw-r--r-- | arch/arm64/kvm/hyp/nvhe/host.S | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/arm64/kvm/hyp/nvhe/host.S b/arch/arm64/kvm/hyp/nvhe/host.S index 128af58d342d..da21fddcef75 100644 --- a/arch/arm64/kvm/hyp/nvhe/host.S +++ b/arch/arm64/kvm/hyp/nvhe/host.S @@ -25,7 +25,6 @@ SYM_FUNC_END(__hyp_do_panic) .macro host_el1_sync_vect .align 7 .L__vect_start\@: - esb stp x0, x1, [sp, #-16]! mrs x0, esr_el2 lsr x0, x0, #ESR_ELx_EC_SHIFT @@ -80,6 +79,11 @@ SYM_FUNC_END(__hyp_do_panic) .endm /* + * The host vector does not use an ESB instruction in order to avoid consuming + * SErrors that should only be consumed by the host. Guest entry is deferred by + * __guest_enter if there are any pending asynchronous exceptions so hyp will + * always return to the host without having consumerd host SErrors. + * * CONFIG_KVM_INDIRECT_VECTORS is not applied to the host vectors because the * host knows about the EL2 vectors already, and there is no point in hiding * them. |