diff options
| author | Andrew Scull <ascull@google.com> | 2020-09-15 11:46:34 +0100 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2020-09-15 18:39:02 +0100 |
| commit | 7db21530479f071ee0e0a4d5fcf5e6bc6c0352ba (patch) | |
| tree | b82fcec803426f124714480a6973972293016416 /arch/arm64/kvm/hyp/nvhe/host.S | |
| parent | 7c2e76d87f9ce7af47a07ca803343fd5f4aa4ab5 (diff) | |
KVM: arm64: Restore hyp when panicking in guest context
If the guest context is loaded when a panic is triggered, restore the
hyp context so e.g. the shadow call stack works when hyp_panic() is
called and SP_EL0 is valid when the host's panic() is called.
Use the hyp context's __hyp_running_vcpu field to track when hyp
transitions to and from the guest vcpu so the exception handlers know
whether the context needs to be restored.
Signed-off-by: Andrew Scull <ascull@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200915104643.2543892-11-ascull@google.com
Diffstat (limited to 'arch/arm64/kvm/hyp/nvhe/host.S')
| -rw-r--r-- | arch/arm64/kvm/hyp/nvhe/host.S | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/arm64/kvm/hyp/nvhe/host.S b/arch/arm64/kvm/hyp/nvhe/host.S index da21fddcef75..9ab7814e6114 100644 --- a/arch/arm64/kvm/hyp/nvhe/host.S +++ b/arch/arm64/kvm/hyp/nvhe/host.S @@ -75,6 +75,11 @@ SYM_FUNC_END(__hyp_do_panic) .macro invalid_host_vect .align 7 + /* If a guest is loaded, panic out of it. */ + stp x0, x1, [sp, #-16]! + get_loaded_vcpu x0, x1 + cbnz x0, __guest_exit_panic + add sp, sp, #16 b hyp_panic .endm |