# HG changeset patch
# User iap10@xxxxxxxxxxxxxxxxxxxxx
# Node ID 08d19da852c73c82eaa8c87b741d22adbcf9a710
# Parent a8a88f85a3e6cdf7548747292df0f68718e86bd4
Optimize the Linux arch xen implementation of "set_pte_at".
Signed-off-by: ian@xxxxxxxxxxxxx
diff -r a8a88f85a3e6 -r 08d19da852c7
linux-2.6-xen-sparse/include/asm-xen/asm-i386/pgtable-2level.h
--- a/linux-2.6-xen-sparse/include/asm-xen/asm-i386/pgtable-2level.h Sat Aug
13 21:01:35 2005
+++ b/linux-2.6-xen-sparse/include/asm-xen/asm-i386/pgtable-2level.h Sat Aug
13 21:26:49 2005
@@ -14,7 +14,17 @@
* hook is made available.
*/
#define set_pte(pteptr, pteval) (*(pteptr) = pteval)
-#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)
+
+inline static void set_pte_at(struct mm_struct *mm, unsigned long addr,
+ pte_t *ptep, pte_t val )
+{
+ if ( ((mm != current->mm) && (mm != &init_mm)) ||
+ HYPERVISOR_update_va_mapping( (addr), (val), 0 ) )
+ {
+ set_pte(ptep, val);
+ }
+}
+
#define set_pte_atomic(pteptr, pteval) set_pte(pteptr,pteval)
#ifndef CONFIG_XEN_SHADOW_MODE
diff -r a8a88f85a3e6 -r 08d19da852c7
linux-2.6-xen-sparse/include/asm-xen/asm-i386/pgtable-3level.h
--- a/linux-2.6-xen-sparse/include/asm-xen/asm-i386/pgtable-3level.h Sat Aug
13 21:01:35 2005
+++ b/linux-2.6-xen-sparse/include/asm-xen/asm-i386/pgtable-3level.h Sat Aug
13 21:26:49 2005
@@ -68,7 +68,16 @@
xen_l1_entry_update((pteptr), (pteval))
# define set_pte_atomic(pteptr,pteval) set_pte(pteptr,pteval)
#endif
-#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)
+
+inline static void set_pte_at(struct mm_struct *mm, unsigned long addr,
+ pte_t *ptep, pte_t val )
+{
+ if ( ((mm != current->mm) && (mm != &init_mm)) ||
+ HYPERVISOR_update_va_mapping( (addr), (val), 0 ) )
+ {
+ set_pte(ptep, val);
+ }
+}
#ifdef CONFIG_XEN_SHADOW_MODE
# define set_pmd(pmdptr,pmdval) \
diff -r a8a88f85a3e6 -r 08d19da852c7
linux-2.6-xen-sparse/include/asm-xen/asm-x86_64/pgtable.h
--- a/linux-2.6-xen-sparse/include/asm-xen/asm-x86_64/pgtable.h Sat Aug 13
21:01:35 2005
+++ b/linux-2.6-xen-sparse/include/asm-xen/asm-x86_64/pgtable.h Sat Aug 13
21:26:49 2005
@@ -265,7 +265,16 @@
val &= ~(_PAGE_USER | _PAGE_DIRTY);
return val & ~(_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED);
}
-#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)
+
+inline static void set_pte_at(struct mm_struct *mm, unsigned long addr,
+ pte_t *ptep, pte_t val )
+{
+ if ( ((mm != current->mm) && (mm != &init_mm)) ||
+ HYPERVISOR_update_va_mapping( (addr), (val), 0 ) )
+ {
+ set_pte(ptep, val);
+ }
+}
#define pte_none(x) (!(x).pte)
#define pte_present(x) ((x).pte & (_PAGE_PRESENT | _PAGE_PROTNONE))
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