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[Qemu-devel] [PATCH] kvm: Fix guest single-stepping
From: |
Jan Kiszka |
Subject: |
[Qemu-devel] [PATCH] kvm: Fix guest single-stepping |
Date: |
Thu, 17 Sep 2009 20:05:58 +0200 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686 (x86_64); de; rv:1.8.1.12) Gecko/20080226 SUSE/2.0.0.12-1.1 Thunderbird/2.0.0.12 Mnenhy/0.7.5.666 |
Hopefully the last regression of 4c0960c0: KVM_SET_GUEST_DEBUG requires
properly synchronized guest registers (on x86: eflags) on entry.
Signed-off-by: Jan Kiszka <address@hidden>
---
kvm-all.c | 8 +++++++-
1 files changed, 7 insertions(+), 1 deletions(-)
diff --git a/kvm-all.c b/kvm-all.c
index 3c37dd7..6142e3f 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -942,7 +942,13 @@ struct kvm_set_guest_debug_data {
static void kvm_invoke_set_guest_debug(void *data)
{
struct kvm_set_guest_debug_data *dbg_data = data;
- dbg_data->err = kvm_vcpu_ioctl(dbg_data->env, KVM_SET_GUEST_DEBUG,
&dbg_data->dbg);
+ CPUState *env = dbg_data->env;
+
+ if (env->kvm_state->regs_modified) {
+ kvm_arch_put_registers(env);
+ env->kvm_state->regs_modified = 0;
+ }
+ dbg_data->err = kvm_vcpu_ioctl(env, KVM_SET_GUEST_DEBUG, &dbg_data->dbg);
}
int kvm_update_guest_debug(CPUState *env, unsigned long reinject_trap)
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