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[RFC,14/23] X86/vvtd: decode interrupt attribute from IRTE

Message ID 1489750043-17260-15-git-send-email-tianyu.lan@intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

lan,Tianyu March 17, 2017, 11:27 a.m. UTC 
From: Chao Gao <chao.gao@intel.com>

Signed-off-by: Chao Gao <chao.gao@intel.com>
Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
---
 xen/arch/x86/hvm/vvtd.c | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)
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Patch

diff --git a/xen/arch/x86/hvm/vvtd.c b/xen/arch/x86/hvm/vvtd.c
index c5df77d..0c49294 100644
--- a/xen/arch/x86/hvm/vvtd.c
+++ b/xen/arch/x86/hvm/vvtd.c
@@ -568,6 +568,25 @@  static int vvtd_handle_irq_request(struct domain *d,
     return -EFAULT;
 }
 
+static int vvtd_get_irq_info(struct domain *d,
+                             struct irq_remapping_request *irq,
+                             struct irq_remapping_info *info)
+{
+    int ret;
+    struct iremap_entry irte;
+    struct vvtd *vvtd = domain_vvtd(d);
+
+    ret = vvtd_get_entry(vvtd, irq, &irte, 0);
+    if ( ret )
+        return -ret;
+
+    info->vector = irte.remap.vector;
+    info->dest = irte_dest(vvtd, &irte);
+    info->dest_mode = irte.remap.dm;
+    info->delivery_mode = irte.remap.dlm;
+    return 0;
+}
+
 static void vvtd_reset(struct vvtd *vvtd, uint64_t capability)
 {
     uint64_t cap, ecap;
@@ -667,5 +686,6 @@  struct viommu_ops vvtd_hvm_vmx_ops = {
     .query_caps = vvtd_query_caps,
     .create = vvtd_create,
     .destroy = vvtd_destroy,
-    .handle_irq_request = vvtd_handle_irq_request
+    .handle_irq_request = vvtd_handle_irq_request,
+    .get_irq_info = vvtd_get_irq_info
 };