From: Marcelo Tosatti <mtosatti@redhat.com>
Date: Sun, 5 May 2013 20:51:49 +0000 (-0300)
Subject: kvmvapic: add ioport read accessor
X-Git-Tag: qemu-xen-4.4.0-rc1~6^2~444^2
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=0c1cd0ae2a4faabeb948b9a07ea1696e853de174;p=qemu-upstream-4.5-testing.git

kvmvapic: add ioport read accessor

Necessary since memory region accessor assumes read and write
methods are registered. Otherwise reading I/O port 0x7e segfaults.

https://bugzilla.redhat.com/show_bug.cgi?id=954306

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Reviewed-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
---

diff --git a/hw/i386/kvmvapic.c b/hw/i386/kvmvapic.c
index 5b558aa18..655483bd1 100644
--- a/hw/i386/kvmvapic.c
+++ b/hw/i386/kvmvapic.c
@@ -687,8 +687,14 @@ static void vapic_write(void *opaque, hwaddr addr, uint64_t data,
     }
 }
 
+static uint64_t vapic_read(void *opaque, hwaddr addr, unsigned size)
+{
+    return 0xffffffff;
+}
+
 static const MemoryRegionOps vapic_ops = {
     .write = vapic_write,
+    .read = vapic_read,
     .endianness = DEVICE_NATIVE_ENDIAN,
 };