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authorMarc Zyngier <marc.zyngier@arm.com>2016-09-06 15:02:13 +0200
committerChristoffer Dall <christoffer.dall@linaro.org>2016-09-08 12:53:00 +0200
commit5d7bcf7d644a88183fb34fca12ad6ea40a8db7ab (patch)
tree48969d8e6e14a595e1bf3e8034ac122b1d7fff1d /arch/arm/kvm/handle_exit.c
parentarm: KVM: Handle async aborts delivered while at HYP (diff)
downloadlinux-5d7bcf7d644a88183fb34fca12ad6ea40a8db7ab.tar.xz
linux-5d7bcf7d644a88183fb34fca12ad6ea40a8db7ab.zip
arm: KVM: Inject a Virtual Abort if it was pending
If we have caught an Abort 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/arm/kvm/handle_exit.c')
-rw-r--r--arch/arm/kvm/handle_exit.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/arm/kvm/handle_exit.c b/arch/arm/kvm/handle_exit.c
index 863fdf42668e..4eacb5cb60e8 100644
--- a/arch/arm/kvm/handle_exit.c
+++ b/arch/arm/kvm/handle_exit.c
@@ -144,6 +144,25 @@ int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run,
{
exit_handle_fn exit_handler;
+ if (ARM_ABORT_PENDING(exception_index)) {
+ u8 hsr_ec = kvm_vcpu_trap_get_class(vcpu);
+
+ /*
+ * HVC/SMC already have an adjusted PC, which we need
+ * to correct in order to return to after having
+ * injected the abort.
+ */
+ if (hsr_ec == HSR_EC_HVC || hsr_ec == HSR_EC_SMC) {
+ 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;