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authorNadav Amit <namit@cs.technion.ac.il>2014-07-24 14:51:24 +0300
committerPaolo Bonzini <pbonzini@redhat.com>2014-07-24 14:04:01 +0200
commitd6e8c8545651b05a86c5b9d29d2fe11ad4cbb9aa (patch)
treedc4fd4b0fae7abdcece4bcd76102253d23c3159b /arch/x86/kvm
parentb9a1ecb909e8f772934cc4bf1f164124c9fbb0d0 (diff)
downloadlinux-d6e8c8545651b05a86c5b9d29d2fe11ad4cbb9aa.tar.gz
KVM: x86: set rflags.rf during fault injection
x86 does not automatically set rflags.rf during event injection. This patch does partial job, setting rflags.rf upon fault injection. It does not handle the setting of RF upon interrupt injection on rep-string instruction. Signed-off-by: Nadav Amit <namit@cs.technion.ac.il> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm')
-rw-r--r--arch/x86/kvm/x86.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 08c48a3c7c3..439f96bf424 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -311,6 +311,31 @@ static int exception_class(int vector)
return EXCPT_BENIGN;
}
+#define EXCPT_FAULT 0
+#define EXCPT_TRAP 1
+#define EXCPT_ABORT 2
+#define EXCPT_INTERRUPT 3
+
+static int exception_type(int vector)
+{
+ unsigned int mask;
+
+ if (WARN_ON(vector > 31 || vector == NMI_VECTOR))
+ return EXCPT_INTERRUPT;
+
+ mask = 1 << vector;
+
+ /* #DB is trap, as instruction watchpoints are handled elsewhere */
+ if (mask & ((1 << DB_VECTOR) | (1 << BP_VECTOR) | (1 << OF_VECTOR)))
+ return EXCPT_TRAP;
+
+ if (mask & ((1 << DF_VECTOR) | (1 << MC_VECTOR)))
+ return EXCPT_ABORT;
+
+ /* Reserved exceptions will result in fault */
+ return EXCPT_FAULT;
+}
+
static void kvm_multiple_exception(struct kvm_vcpu *vcpu,
unsigned nr, bool has_error, u32 error_code,
bool reinject)
@@ -5893,6 +5918,11 @@ static int inject_pending_event(struct kvm_vcpu *vcpu, bool req_int_win)
trace_kvm_inj_exception(vcpu->arch.exception.nr,
vcpu->arch.exception.has_error_code,
vcpu->arch.exception.error_code);
+
+ if (exception_type(vcpu->arch.exception.nr) == EXCPT_FAULT)
+ __kvm_set_rflags(vcpu, kvm_get_rflags(vcpu) |
+ X86_EFLAGS_RF);
+
kvm_x86_ops->queue_exception(vcpu, vcpu->arch.exception.nr,
vcpu->arch.exception.has_error_code,
vcpu->arch.exception.error_code,