[Xen-changelog] [xen-unstable] physdev: make PHYSDEVOP_pirq_eoi_mfn use of gmfn instead of mfn.

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1228304687 0
# Node ID cb526325927c0abac441588b4a69bccd0b99d7b3
# Parent  9a6153a89d6642555c9ed4dc386d243c3df23eab
physdev: make PHYSDEVOP_pirq_eoi_mfn use of gmfn instead of mfn.

To pass a page from a guest to hypervisor, gmfn should be used
instead of mfn like grant table and other hypercalls. It's more
consistent. So make use of gmfn instead of mfn for
PHYSDEVOP_pirq_eoi_mfn hypercall.

Signed-off-by: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>
Signed-off-by: Keir Fraser <keir.fraser@xxxxxxxxxx>
---
 xen/arch/x86/physdev.c        |   21 ++++++++++++---------
 xen/arch/x86/x86_64/physdev.c |    4 ++--
 xen/include/public/physdev.h  |   14 +++++++-------
 3 files changed, 21 insertions(+), 18 deletions(-)

diff -r 9a6153a89d66 -r cb526325927c xen/arch/x86/physdev.c
--- a/xen/arch/x86/physdev.c    Wed Dec 03 11:38:36 2008 +0000
+++ b/xen/arch/x86/physdev.c    Wed Dec 03 11:44:47 2008 +0000
@@ -14,6 +14,7 @@
 #include <public/xen.h>
 #include <public/physdev.h>
 #include <xsm/xsm.h>
+#include <asm/p2m.h>
 
 #ifndef COMPAT
 typedef long ret_t;
@@ -200,8 +201,9 @@ ret_t do_physdev_op(int cmd, XEN_GUEST_H
         break;
     }
 
-    case PHYSDEVOP_pirq_eoi_mfn: {
-        struct physdev_pirq_eoi_mfn info;
+    case PHYSDEVOP_pirq_eoi_gmfn: {
+        struct physdev_pirq_eoi_gmfn info;
+        unsigned long mfn;
 
         BUILD_BUG_ON(NR_IRQS > (PAGE_SIZE * 8));
 
@@ -210,23 +212,24 @@ ret_t do_physdev_op(int cmd, XEN_GUEST_H
             break;
 
         ret = -EINVAL;
-        if ( !mfn_valid(info.mfn) ||
-             !get_page_and_type(mfn_to_page(info.mfn), v->domain,
+        mfn = gmfn_to_mfn(current->domain, info.gmfn);
+        if ( !mfn_valid(mfn) ||
+             !get_page_and_type(mfn_to_page(mfn), v->domain,
                                 PGT_writable_page) )
             break;
 
-        if ( cmpxchg(&v->domain->arch.pirq_eoi_map_mfn, 0, info.mfn) != 0 )
-        {
-            put_page_and_type(mfn_to_page(info.mfn));
+        if ( cmpxchg(&v->domain->arch.pirq_eoi_map_mfn, 0, mfn) != 0 )
+        {
+            put_page_and_type(mfn_to_page(mfn));
             ret = -EBUSY;
             break;
         }
 
-        v->domain->arch.pirq_eoi_map = map_domain_page_global(info.mfn);
+        v->domain->arch.pirq_eoi_map = map_domain_page_global(mfn);
         if ( v->domain->arch.pirq_eoi_map == NULL )
         {
             v->domain->arch.pirq_eoi_map_mfn = 0;
-            put_page_and_type(mfn_to_page(info.mfn));
+            put_page_and_type(mfn_to_page(mfn));
             ret = -ENOSPC;
             break;
         }
diff -r 9a6153a89d66 -r cb526325927c xen/arch/x86/x86_64/physdev.c
--- a/xen/arch/x86/x86_64/physdev.c     Wed Dec 03 11:38:36 2008 +0000
+++ b/xen/arch/x86/x86_64/physdev.c     Wed Dec 03 11:44:47 2008 +0000
@@ -18,8 +18,8 @@
 #define physdev_eoi                compat_physdev_eoi
 #define physdev_eoi_t              physdev_eoi_compat_t
 
-#define physdev_pirq_eoi_mfn       compat_physdev_pirq_eoi_mfn
-#define physdev_pirq_eoi_mfn_t     physdev_pirq_eoi_mfn_compat_t
+#define physdev_pirq_eoi_gmfn      compat_physdev_pirq_eoi_gmfn
+#define physdev_pirq_eoi_gmfn_t    physdev_pirq_eoi_gmfn_compat_t
 
 #define physdev_set_iobitmap       compat_physdev_set_iobitmap
 #define physdev_set_iobitmap_t     physdev_set_iobitmap_compat_t
diff -r 9a6153a89d66 -r cb526325927c xen/include/public/physdev.h
--- a/xen/include/public/physdev.h      Wed Dec 03 11:38:36 2008 +0000
+++ b/xen/include/public/physdev.h      Wed Dec 03 11:44:47 2008 +0000
@@ -47,13 +47,13 @@ DEFINE_XEN_GUEST_HANDLE(physdev_eoi_t);
  * will automatically get unmasked. The page registered is used as a bit
  * array indexed by Xen's PIRQ value.
  */
-#define PHYSDEVOP_pirq_eoi_mfn          17
-struct physdev_pirq_eoi_mfn {
-    /* IN */
-    xen_pfn_t mfn;
-};
-typedef struct physdev_pirq_eoi_mfn physdev_pirq_eoi_mfn_t;
-DEFINE_XEN_GUEST_HANDLE(physdev_pirq_eoi_mfn_t);
+#define PHYSDEVOP_pirq_eoi_gmfn         17
+struct physdev_pirq_eoi_gmfn {
+    /* IN */
+    xen_pfn_t gmfn;
+};
+typedef struct physdev_pirq_eoi_gmfn physdev_pirq_eoi_gmfn_t;
+DEFINE_XEN_GUEST_HANDLE(physdev_pirq_eoi_gmfn_t);
 
 /*
  * Query the status of an IRQ line.

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