[PATCH v2 4/8] x86/emul: Populate pending_dbg field of x86_event from {svm,vmx}_get_pending_event()

[Jinoh Kang]

Ensure that we pass the correct pending_dbg value to
hvm_monitor_interrupt().

Signed-off-by: Jinoh Kang <jinoh.kang...@gmail.com>
---
CC: Andrew Cooper <andrew.coop...@citrix.com>
CC: Jan Beulich <jbeul...@suse.com>
CC: Wei Liu <w...@xen.org>
CC: Roger Pau Monné <roger....@citrix.com>
CC: Jun Nakajima <jun.nakaj...@intel.com>
CC: Kevin Tian <kevin.t...@intel.com>
CC: Tamas K Lengyel <ta...@tklengyel.com>
CC: Alexandru Isaila <aisa...@bitdefender.com>
CC: Petre Pircalabu <ppircal...@bitdefender.com>

v1 -> v2: new patch
---
 xen/arch/x86/hvm/svm/svm.c | 8 ++++++++
 xen/arch/x86/hvm/vmx/vmx.c | 8 ++++++++
 2 files changed, 16 insertions(+)

diff --git a/xen/arch/x86/hvm/svm/svm.c b/xen/arch/x86/hvm/svm/svm.c
index 3d0402cb10..038c8d6e7e 100644
--- a/xen/arch/x86/hvm/svm/svm.c
+++ b/xen/arch/x86/hvm/svm/svm.c
@@ -2422,6 +2422,14 @@ static bool cf_check svm_get_pending_event(
     info->type = vmcb->event_inj.type;
     info->error_code = vmcb->event_inj.ec;
 
+    if ( info->type == X86_EVENTTYPE_HW_EXCEPTION &&
+         info->vector == X86_EXC_DB )
+    {
+        unsigned long dr6 = v->arch.hvm.flag_dr_dirty ?
+                            vmcb_get_dr6(vmcb) : v->arch.dr6;
+        info->pending_dbg = dr6 ^ X86_DR6_DEFAULT;
+    }
+
     return true;
 }
 
diff --git a/xen/arch/x86/hvm/vmx/vmx.c b/xen/arch/x86/hvm/vmx/vmx.c
index 9c92d2be92..9b59374258 100644
--- a/xen/arch/x86/hvm/vmx/vmx.c
+++ b/xen/arch/x86/hvm/vmx/vmx.c
@@ -2469,6 +2469,14 @@ static bool cf_check vmx_get_pending_event(
     info->type = MASK_EXTR(intr_info, INTR_INFO_INTR_TYPE_MASK);
     info->error_code = error_code;
 
+    if ( info->type == X86_EVENTTYPE_HW_EXCEPTION &&
+         info->vector == X86_EXC_DB )
+    {
+        unsigned long dr6 = v->arch.hvm.flag_dr_dirty ?
+                            read_debugreg(6) : v->arch.dr6;
+        info->pending_dbg = dr6 ^ X86_DR6_DEFAULT;
+    }
+
     return true;
 }
 
-- 
2.41.0