[Xen-devel] [PATCH v5 16/17] VT-d: Dump the posted format IRTE

[Feng Wu <feng.wu@xxxxxxxxx>]

Add the utility to dump the posted format IRTE.

CC: Yang Zhang <yang.z.zhang@xxxxxxxxx>
CC: Kevin Tian <kevin.tian@xxxxxxxxx>
Signed-off-by: Feng Wu <feng.wu@xxxxxxxxx>
---
v4:
- Newly added

 xen/drivers/passthrough/vtd/utils.c | 41 ++++++++++++++++++++++++++++++++++++-
 1 file changed, 40 insertions(+), 1 deletion(-)

diff --git a/xen/drivers/passthrough/vtd/utils.c 
b/xen/drivers/passthrough/vtd/utils.c
index 9d556da..1848385 100644
--- a/xen/drivers/passthrough/vtd/utils.c
+++ b/xen/drivers/passthrough/vtd/utils.c
@@ -203,6 +203,9 @@ static void dump_iommu_info(unsigned char key)
             ecap_intr_remap(iommu->ecap) ? "" : "not ",
             (status & DMA_GSTS_IRES) ? " and enabled" : "" );
 
+        printk("  Interrupt Posting: %ssupported.\n",
+            cap_intr_post(iommu->ecap) ? "" : "not ");
+
         if ( status & DMA_GSTS_IRES )
         {
             /* Dump interrupt remapping table. */
@@ -213,6 +216,7 @@ static void dump_iommu_info(unsigned char key)
 
             printk("  Interrupt remapping table (nr_entry=%#x. "
                 "Only dump P=1 entries here):\n", nr_entry);
+            printk ("Entries for remapped format:\n");
             printk("       SVT  SQ   SID      DST  V  AVL DLM TM RH DM "
                    "FPD P\n");
             for ( i = 0; i < nr_entry; i++ )
@@ -230,7 +234,7 @@ static void dump_iommu_info(unsigned char key)
                 else
                     p = &iremap_entries[i % (1 << IREMAP_ENTRY_ORDER)];
 
-                if ( !p->remap.p )
+                if ( !p->remap.p || p->remap.im )
                     continue;
                 printk("  %04x:  %x   %x  %04x %08x %02x    %x   %x  %x  %x  
%x"
                     "   %x %x\n", i,
@@ -239,6 +243,41 @@ static void dump_iommu_info(unsigned char key)
                     p->remap.rh, p->remap.dm, p->remap.fpd, p->remap.p);
                 print_cnt++;
             }
+
+            if ( iremap_entries )
+                unmap_vtd_domain_page(iremap_entries);
+
+            iremap_entries = NULL;
+            printk ("\nEntries for posted format:\n");
+            printk("       SVT  SQ   SID              PDA  V  URG AVL FPD 
P\n");
+            for ( i = 0; i < nr_entry; i++ )
+            {
+                struct iremap_entry *p;
+                if ( i % (1 << IREMAP_ENTRY_ORDER) == 0 )
+                {
+                    /* This entry across page boundry */
+                    if ( iremap_entries )
+                        unmap_vtd_domain_page(iremap_entries);
+
+                    GET_IREMAP_ENTRY(iremap_maddr, i,
+                                     iremap_entries, p);
+                }
+                else
+                    p = &iremap_entries[i % (1 << IREMAP_ENTRY_ORDER)];
+
+                if ( !p->post.p || !p->post.im )
+                    continue;
+
+                printk("  %04x:  %x   %x  %04x %16lx %02x    %x   %x  %x  
%x\n",
+                    i,
+                    p->post.svt, p->post.sq, p->post.sid,
+                    ((u64)p->post.pda_h << 32) | (p->post.pda_l << 6),
+                    p->post.vector, p->post.urg, p->post.avail, p->post.fpd,
+                    p->post.p);
+
+                print_cnt++;
+            }
+
             if ( iremap_entries )
                 unmap_vtd_domain_page(iremap_entries);
             if ( iommu_ir_ctrl(iommu)->iremap_num != print_cnt )
-- 
2.1.0


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