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| author | Marc Zyngier <marc.zyngier@arm.com> | 2016-01-06 12:12:42 +0300 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2016-02-29 21:34:14 +0300 |
| commit | c36b6db5f3e4c1bd21659aee8e67226352d254ae (patch) | |
| tree | f4a002e0cc3e0876a29724bdf25e534720a11eb5 /arch/arm/kvm/hyp/hyp-entry.S | |
| parent | bafc6c2a22553193d1d1ce83783b7faa0924158e (diff) | |
| download | linux-c36b6db5f3e4c1bd21659aee8e67226352d254ae.tar.xz | |
ARM: KVM: Add panic handling code
Instead of spinning forever, let's "properly" handle any unexpected
exception ("properly" meaning "print a spat on the console and die").
This has proved useful quite a few times...
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'arch/arm/kvm/hyp/hyp-entry.S')
| -rw-r--r-- | arch/arm/kvm/hyp/hyp-entry.S | 28 |
1 files changed, 21 insertions, 7 deletions
diff --git a/arch/arm/kvm/hyp/hyp-entry.S b/arch/arm/kvm/hyp/hyp-entry.S index 1b4aa02fd364..54a8d67ad980 100644 --- a/arch/arm/kvm/hyp/hyp-entry.S +++ b/arch/arm/kvm/hyp/hyp-entry.S @@ -75,15 +75,29 @@ __kvm_hyp_vector: .macro invalid_vector label, cause .align -\label: b . +\label: mov r0, #\cause + b __hyp_panic .endm - invalid_vector hyp_reset - invalid_vector hyp_undef - invalid_vector hyp_svc - invalid_vector hyp_pabt - invalid_vector hyp_dabt - invalid_vector hyp_fiq + invalid_vector hyp_reset ARM_EXCEPTION_RESET + invalid_vector hyp_undef ARM_EXCEPTION_UNDEFINED + invalid_vector hyp_svc ARM_EXCEPTION_SOFTWARE + invalid_vector hyp_pabt ARM_EXCEPTION_PREF_ABORT + invalid_vector hyp_dabt ARM_EXCEPTION_DATA_ABORT + invalid_vector hyp_fiq ARM_EXCEPTION_FIQ + +ENTRY(__hyp_do_panic) + mrs lr, cpsr + bic lr, lr, #MODE_MASK + orr lr, lr, #SVC_MODE +THUMB( orr lr, lr, #PSR_T_BIT ) + msr spsr_cxsf, lr + ldr lr, =panic + msr ELR_hyp, lr + ldr lr, =kvm_call_hyp + clrex + eret +ENDPROC(__hyp_do_panic) hyp_hvc: /* |