[PULL 24/50] arm64: KVM: Inject a Virtual SError if it was pending
From: Christoffer Dall <hidden>
Date: 2016-09-27 18:05:32
Also in:
kvm, kvmarm
Subsystem:
arm64 port (aarch64 architecture), kernel virtual machine for arm64 (kvm/arm64), the rest · Maintainers:
Catalin Marinas, Will Deacon, Marc Zyngier, Oliver Upton, Linus Torvalds
From: Marc Zyngier <redacted> 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 <redacted> Signed-off-by: Christoffer Dall <redacted> --- arch/arm64/kvm/handle_exit.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+)
diff --git a/arch/arm64/kvm/handle_exit.c b/arch/arm64/kvm/handle_exit.c
index 08afc69a..a204adf 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;
--
2.9.0