From: George Dunlap <dunlapg@silas.(none)>
Date: Mon, 3 Nov 2008 12:17:09 +0000 (+0000)
Subject: Updated io handling
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=d452bb44201ee5f32b1ef8e9cea324b1da971eff;p=xenalyze.git

Updated io handling
(cherry picked from commit 5095949ef92cf052d46be8f56c13474fa23bf631)
---

diff --git a/analyze.c b/analyze.c
index 2bdbbf9..5eed6d2 100644
--- a/analyze.c
+++ b/analyze.c
@@ -1191,7 +1191,8 @@ struct hvm_data {
     /* In-flight accumulation information */
     union {
         struct {
-            unsigned port:16,size:16;
+            unsigned port:31,
+                is_write:1;
             unsigned long val;
         } io;
         struct pf_xen_extra pf_xen;
@@ -3257,7 +3258,7 @@ void hvm_vlapic_handler(struct hvm_data *h)
 }
 
 
-#define HVM_MMIO_ASSIST_WRITE 0x200
+#define HVM_IO_ASSIST_WRITE 0x200
 void hvm_mmio_assist_process(struct record_info *ri, struct hvm_data *h)
 {
     struct pf_xen_extra *e = &h->inflight.pf_xen;
@@ -3428,46 +3429,20 @@ void hvm_io_write_postprocess(struct hvm_data *h)
 {
     if(opt.dump_cooked)
     {
-        printf(" %s io_write port %x size %u val %lx\n",
+        printf(" %s io_write port %x val %lx\n",
                h->dump_header, h->inflight.io.port,
-               h->inflight.io.size,
                h->inflight.io.val);
     }
     if(opt.with_pio_enumeration)
         update_io_address(&h->summary.pio, h->inflight.io.port, 1, h->arc_cycles);
 }
 
-void hvm_io_write_process(struct hvm_data *h)
-{
-    struct {
-        unsigned long port;
-        int size;
-        unsigned long val;
-    } *r = (typeof(r))h->d;
-
-    unsigned long long mask = ((1ULL<<(r->size<<3))-1);
-
-    h->inflight.io.port = r->port;
-    h->inflight.io.size = r->size;
-    h->inflight.io.val = r->val & mask;
-
-    if(opt.dump_all)
-    {
-        printf(" %s io_write port %lx size %d val %lx\n",
-               h->dump_header,
-               r->port, r->size, r->val);
-    }
-
-    h->post_process = hvm_io_write_postprocess;
-}
-
 void hvm_io_read_postprocess(struct hvm_data *h)
 {
     if(opt.dump_cooked)
     {
-        printf(" %s io_read port %x size %u val %lx\n",
+        printf(" %s io_read port %x val %lx\n",
                h->dump_header, h->inflight.io.port,
-               h->inflight.io.size,
                h->inflight.io.val);
     }
     if(opt.with_pio_enumeration)
@@ -3476,48 +3451,48 @@ void hvm_io_read_postprocess(struct hvm_data *h)
         scatterplot_vs_time(h->exit_tsc, P.now - h->exit_tsc);
 }
 
-void hvm_io_assist_process(struct hvm_data *h)
+void hvm_io_assist_process(struct record_info *ri, struct hvm_data *h)
 {
-    struct {
-        unsigned long val;
+    union {
+        struct {
+            unsigned long port;
+            unsigned long data;
+        } x32;
     } *r = (typeof(r))h->d;
 
-    int size = h->inflight.io.size;
-    unsigned long long mask = ((1ULL<<(size<<3))-1);
-
-    h->inflight.io.val = r->val & mask;
+    union {
+        unsigned event;
+        struct {
+            unsigned minor:8,
+                x64:1,
+                write:2;
+        };
+    } mevt = { .event = ri->event };
 
-    if(opt.dump_all)
-    {
-        printf(" %s io_assist val %lx\n",
-               h->dump_header,
-               r->val);
+    if(mevt.x64) {
+        fprintf(stderr, "FATAL: Unexpected 64-bit PIO\n");
+        exit(1);
     }
 
+    h->inflight.io.port = r->x32.port;
+    h->inflight.io.val = r->x32.data;
 
-    if(!h->post_process)
-        fprintf(warn, "Strange, io_assist but post_process not set!\n");
-}
-
-void hvm_io_read_process(struct hvm_data *h)
-{
-    struct {
-        unsigned long port;
-        int size;
-    } *r = (typeof(r))h->d;
-
-    h->inflight.io.port = r->port;
-    h->inflight.io.size = r->size;
-    h->inflight.io.val = 0;
+    if(mevt.write) {
+        h->inflight.io.is_write = 1;
+        h->post_process = hvm_io_write_postprocess;
+    } else {
+        h->inflight.io.is_write = 0;
+        h->post_process = hvm_io_read_postprocess;
+    }
 
     if(opt.dump_all)
     {
-        printf(" %s io_read port %lx size %d\n",
+        printf(" %s io %s port %lu val %lx\n",
                h->dump_header,
-               r->port, r->size);
+               mevt.write?"write":"read",
+               r->x32.port,
+               r->x32.data);
     }
-
-    h->post_process = hvm_io_read_postprocess;
 }
 
 /* cr_write */
@@ -4293,17 +4268,13 @@ needs_vmexit:
     case TRC_HVM_PF_XEN64:
         hvm_pf_xen_process(ri, h);
         break;
-    case TRC_HVM_IO_READ:
-        hvm_io_read_process(h);
-        break;
-    case TRC_HVM_IO_WRITE:
-        hvm_io_write_process(h);
-        break;
     case TRC_HVM_IO_ASSIST:
-        hvm_io_assist_process(h);
+    case TRC_HVM_IO_ASSIST|HVM_IO_ASSIST_WRITE:
+        hvm_io_assist_process(ri, h);
         break;
     case TRC_HVM_MMIO_ASSIST:
-    case TRC_HVM_MMIO_ASSIST|HVM_MMIO_ASSIST_WRITE:
+    case TRC_HVM_MMIO_ASSIST|HVM_IO_ASSIST_WRITE:
+        /* FIXME: 64-bit */
         hvm_mmio_assist_process(ri, h);
         break;
     case TRC_HVM_CR_WRITE: