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authorZachary Amsden <zach@vmware.com>2007-03-05 00:30:37 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-03-05 07:57:52 -0800
commit9a1c13e91f100c12dcad3a1be1b12890bf32f6ff (patch)
tree9c132900f5b331570d91df515167776586fb2960 /include/asm-i386/pgtable.h
parent1182d8528b620c23d043bccbbef092b42062960a (diff)
[PATCH] vmi: fix highpte
Provide a PT map hook for HIGHPTE kernels to designate where they are mapping page tables. This information is required so the physical address of PTE updates can be determined; otherwise, the mm layer would have to carry the physical address all the way to each PTE modification callsite, which is even more hideous that the macros required to provide the proper hooks. So lets not mess up arch neutral code to achieve this, but keep the horror in an #ifdef HIGHPTE in include/asm-i386/pgtable.h. I had to use macros here because some types are not yet defined in all the include paths for this header. This patch is absolutely required for HIGHPTE kernels to operate properly with VMI. Signed-off-by: Zachary Amsden <zach@vmware.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/asm-i386/pgtable.h')
-rw-r--r--include/asm-i386/pgtable.h23
1 files changed, 19 insertions, 4 deletions
diff --git a/include/asm-i386/pgtable.h b/include/asm-i386/pgtable.h
index e6a4723f0eb..c3b58d473a5 100644
--- a/include/asm-i386/pgtable.h
+++ b/include/asm-i386/pgtable.h
@@ -263,6 +263,7 @@ static inline pte_t pte_mkhuge(pte_t pte) { (pte).pte_low |= _PAGE_PSE; return p
*/
#define pte_update(mm, addr, ptep) do { } while (0)
#define pte_update_defer(mm, addr, ptep) do { } while (0)
+#define paravirt_map_pt_hook(slot, va, pfn) do { } while (0)
#endif
/*
@@ -469,10 +470,24 @@ extern pte_t *lookup_address(unsigned long address);
#endif
#if defined(CONFIG_HIGHPTE)
-#define pte_offset_map(dir, address) \
- ((pte_t *)kmap_atomic(pmd_page(*(dir)),KM_PTE0) + pte_index(address))
-#define pte_offset_map_nested(dir, address) \
- ((pte_t *)kmap_atomic(pmd_page(*(dir)),KM_PTE1) + pte_index(address))
+#define pte_offset_map(dir, address) \
+({ \
+ pte_t *__ptep; \
+ unsigned pfn = pmd_val(*(dir)) >> PAGE_SHIFT; \
+ __ptep = (pte_t *)kmap_atomic(pfn_to_page(pfn),KM_PTE0);\
+ paravirt_map_pt_hook(KM_PTE0,__ptep, pfn); \
+ __ptep = __ptep + pte_index(address); \
+ __ptep; \
+})
+#define pte_offset_map_nested(dir, address) \
+({ \
+ pte_t *__ptep; \
+ unsigned pfn = pmd_val(*(dir)) >> PAGE_SHIFT; \
+ __ptep = (pte_t *)kmap_atomic(pfn_to_page(pfn),KM_PTE1);\
+ paravirt_map_pt_hook(KM_PTE1,__ptep, pfn); \
+ __ptep = __ptep + pte_index(address); \
+ __ptep; \
+})
#define pte_unmap(pte) kunmap_atomic(pte, KM_PTE0)
#define pte_unmap_nested(pte) kunmap_atomic(pte, KM_PTE1)
#else