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| author | Marc Zyngier <marc.zyngier@arm.com> | 2016-09-06 15:02:06 +0200 |
|---|---|---|
| committer | Christoffer Dall <christoffer.dall@linaro.org> | 2016-09-08 12:53:00 +0200 |
| commit | ddb3d07cfe90ce58c342cf97ce6ce53ba7d10973 (patch) | |
| tree | 10178630a3b5c24a880ce7efd2a3e9e9337a3233 /arch/arm64/kvm | |
| parent | arm64: KVM: Allow an exit code to be tagged with an SError (diff) | |
| download | linux-ddb3d07cfe90ce58c342cf97ce6ce53ba7d10973.tar.xz linux-ddb3d07cfe90ce58c342cf97ce6ce53ba7d10973.zip | |
arm64: KVM: Inject a Virtual SError if it was pending
If we have caught an SError whilst exiting, we've tagged the
exit code with the pending information. In that case, let's
re-inject the error into the guest, after having adjusted
the PC if required.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Diffstat (limited to 'arch/arm64/kvm')
| -rw-r--r-- | arch/arm64/kvm/handle_exit.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/arm64/kvm/handle_exit.c b/arch/arm64/kvm/handle_exit.c index 08afc69ab157..a204adf29f0a 100644 --- a/arch/arm64/kvm/handle_exit.c +++ b/arch/arm64/kvm/handle_exit.c @@ -170,6 +170,26 @@ int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run, { exit_handle_fn exit_handler; + if (ARM_SERROR_PENDING(exception_index)) { + u8 hsr_ec = ESR_ELx_EC(kvm_vcpu_get_hsr(vcpu)); + + /* + * HVC/SMC already have an adjusted PC, which we need + * to correct in order to return to after having + * injected the SError. + */ + if (hsr_ec == ESR_ELx_EC_HVC32 || hsr_ec == ESR_ELx_EC_HVC64 || + hsr_ec == ESR_ELx_EC_SMC32 || hsr_ec == ESR_ELx_EC_SMC64) { + u32 adj = kvm_vcpu_trap_il_is32bit(vcpu) ? 4 : 2; + *vcpu_pc(vcpu) -= adj; + } + + kvm_inject_vabt(vcpu); + return 1; + } + + exception_index = ARM_EXCEPTION_CODE(exception_index); + switch (exception_index) { case ARM_EXCEPTION_IRQ: return 1; |