x86, hvm: Fix stdvga and buffered-io code.

Corrected a bug in the stdvga code where it did not properly handle 32
bit operations. The buf_ioreq_t can now store 32 bits of data.

Signed-off-by: Robert Phillips <rphillips@virtualiron.com>
Signed-off-by: Ben Guthro <bguthro@virtualiron.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/xen/arch/x86/hvm/stdvga.c b/xen/arch/x86/hvm/stdvga.c
index 79bcc5b074..7d2599ca69 100644
--- a/xen/arch/x86/hvm/stdvga.c
+++ b/xen/arch/x86/hvm/stdvga.c
@@ -296,6 +296,8 @@ int stdvga_intercept_pio(ioreq_t *p)
     {
         if ( p->size != 1 )
             gdprintk(XENLOG_WARNING, "unexpected io size:%d\n", (int)p->size);
+        if ( p->data_is_ptr )
+            gdprintk(XENLOG_WARNING, "unexpected data_is_ptr\n");
         if ( !((p->addr == 0x3c5) && (s->sr_index >= sizeof(sr_mask))) &&
              !((p->addr == 0x3cf) && (s->gr_index >= sizeof(gr_mask))) )
         {
@@ -643,6 +645,10 @@ int stdvga_intercept_mmio(ioreq_t *p)
             s->cache = 0;
         }
     }
+    else
+    {
+        buf = (p->dir == IOREQ_WRITE);
+    }
 
     rc = (buf && hvm_buffered_io_send(p));