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authorTyler Baicar <tbaicar@codeaurora.org>2017-06-21 21:17:14 +0300
committerWill Deacon <will.deacon@arm.com>2017-06-22 20:22:05 +0300
commit621f48e40ee9b0100a802531069166d7d94796e0 (patch)
tree3411689c2307e6f82325354c85c8940cf9aec483 /virt/kvm
parente9279e83ad1f4b5af541a522a81888f828210b40 (diff)
downloadlinux-621f48e40ee9b0100a802531069166d7d94796e0.tar.xz
arm/arm64: KVM: add guest SEA support
Currently external aborts are unsupported by the guest abort handling. Add handling for SEAs so that the host kernel reports SEAs which occur in the guest kernel. When an SEA occurs in the guest kernel, the guest exits and is routed to kvm_handle_guest_abort(). Prior to this patch, a print message of an unsupported FSC would be printed and nothing else would happen. With this patch, the code gets routed to the APEI handling of SEAs in the host kernel to report the SEA information. Signed-off-by: Tyler Baicar <tbaicar@codeaurora.org> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Marc Zyngier <marc.zyngier@arm.com> Acked-by: Christoffer Dall <cdall@linaro.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'virt/kvm')
-rw-r--r--virt/kvm/arm/mmu.c36
1 files changed, 33 insertions, 3 deletions
diff --git a/virt/kvm/arm/mmu.c b/virt/kvm/arm/mmu.c
index a2d63247d1bb..bde0cdd60997 100644
--- a/virt/kvm/arm/mmu.c
+++ b/virt/kvm/arm/mmu.c
@@ -29,6 +29,7 @@
#include <asm/kvm_asm.h>
#include <asm/kvm_emulate.h>
#include <asm/virt.h>
+#include <asm/system_misc.h>
#include "trace.h"
@@ -1427,6 +1428,25 @@ out:
kvm_set_pfn_accessed(pfn);
}
+static bool is_abort_sea(unsigned long fault_status)
+{
+ switch (fault_status) {
+ case FSC_SEA:
+ case FSC_SEA_TTW0:
+ case FSC_SEA_TTW1:
+ case FSC_SEA_TTW2:
+ case FSC_SEA_TTW3:
+ case FSC_SECC:
+ case FSC_SECC_TTW0:
+ case FSC_SECC_TTW1:
+ case FSC_SECC_TTW2:
+ case FSC_SECC_TTW3:
+ return true;
+ default:
+ return false;
+ }
+}
+
/**
* kvm_handle_guest_abort - handles all 2nd stage aborts
* @vcpu: the VCPU pointer
@@ -1449,19 +1469,29 @@ int kvm_handle_guest_abort(struct kvm_vcpu *vcpu, struct kvm_run *run)
gfn_t gfn;
int ret, idx;
+ fault_status = kvm_vcpu_trap_get_fault_type(vcpu);
+
+ fault_ipa = kvm_vcpu_get_fault_ipa(vcpu);
+
+ /*
+ * The host kernel will handle the synchronous external abort. There
+ * is no need to pass the error into the guest.
+ */
+ if (is_abort_sea(fault_status)) {
+ if (!handle_guest_sea(fault_ipa, kvm_vcpu_get_hsr(vcpu)))
+ return 1;
+ }
+
is_iabt = kvm_vcpu_trap_is_iabt(vcpu);
if (unlikely(!is_iabt && kvm_vcpu_dabt_isextabt(vcpu))) {
kvm_inject_vabt(vcpu);
return 1;
}
- fault_ipa = kvm_vcpu_get_fault_ipa(vcpu);
-
trace_kvm_guest_fault(*vcpu_pc(vcpu), kvm_vcpu_get_hsr(vcpu),
kvm_vcpu_get_hfar(vcpu), fault_ipa);
/* Check the stage-2 fault is trans. fault or write fault */
- fault_status = kvm_vcpu_trap_get_fault_type(vcpu);
if (fault_status != FSC_FAULT && fault_status != FSC_PERM &&
fault_status != FSC_ACCESS) {
kvm_err("Unsupported FSC: EC=%#x xFSC=%#lx ESR_EL2=%#lx\n",