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author | Marc Zyngier <marc.zyngier@arm.com> | 2015-10-25 15:21:52 +0000 |
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committer | Marc Zyngier <marc.zyngier@arm.com> | 2015-12-14 11:30:42 +0000 |
commit | 53fd5b6487e4438049a5da5e36dfb8edcf1fd789 (patch) | |
tree | f76af58124936d36e22a7e69b992b5cf414e0c2e /arch/arm64/kvm/hyp/switch.c | |
parent | 2b28162cf65a6fe1c93d172675e4f2792792f17e (diff) | |
download | talos-op-linux-53fd5b6487e4438049a5da5e36dfb8edcf1fd789.tar.gz talos-op-linux-53fd5b6487e4438049a5da5e36dfb8edcf1fd789.zip |
arm64: KVM: Add panic handling
Add the panic handler, together with the small bits of assembly
code to call the kernel's panic implementation.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Diffstat (limited to 'arch/arm64/kvm/hyp/switch.c')
-rw-r--r-- | arch/arm64/kvm/hyp/switch.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/arch/arm64/kvm/hyp/switch.c b/arch/arm64/kvm/hyp/switch.c index 608155f5b856..b012870a92e7 100644 --- a/arch/arm64/kvm/hyp/switch.c +++ b/arch/arm64/kvm/hyp/switch.c @@ -141,3 +141,33 @@ int __hyp_text __guest_run(struct kvm_vcpu *vcpu) return exit_code; } + +static const char __hyp_panic_string[] = "HYP panic:\nPS:%08llx PC:%016llx ESR:%08llx\nFAR:%016llx HPFAR:%016llx PAR:%016llx\nVCPU:%p\n"; + +void __hyp_text __noreturn __hyp_panic(void) +{ + unsigned long str_va = (unsigned long)__hyp_panic_string; + u64 spsr = read_sysreg(spsr_el2); + u64 elr = read_sysreg(elr_el2); + u64 par = read_sysreg(par_el1); + + if (read_sysreg(vttbr_el2)) { + struct kvm_vcpu *vcpu; + struct kvm_cpu_context *host_ctxt; + + vcpu = (struct kvm_vcpu *)read_sysreg(tpidr_el2); + host_ctxt = kern_hyp_va(vcpu->arch.host_cpu_context); + __deactivate_traps(vcpu); + __deactivate_vm(vcpu); + __sysreg_restore_state(host_ctxt); + } + + /* Call panic for real */ + __hyp_do_panic(hyp_kern_va(str_va), + spsr, elr, + read_sysreg(esr_el2), read_sysreg(far_el2), + read_sysreg(hpfar_el2), par, + (void *)read_sysreg(tpidr_el2)); + + unreachable(); +} |