Displaying 20 results from an estimated 116 matches for "pmd_offset".
2007 Apr 18
1
Is this a typo?
...e;
#ifdef CONFIG_X86_PAE
pmd_table = (pmd_t *) alloc_bootmem_low_pages(PAGE_SIZE);
paravirt_alloc_pmd(__pa(page_table) >> PAGE_SHIFT);
^^^^^^^^^^ pmd_table?
set_pgd(pgd, __pgd(__pa(pmd_table) | _PAGE_PRESENT));
pud = pud_offset(pgd, 0);
if (pmd_table != pmd_offset(pud, 0))
BUG();
#else
pud = pud_offset(pgd, 0);
pmd_table = pmd_offset(pud, 0);
#endif
return pmd_table;
}
Also, did you anticipate that these paravirt_alloc_* functions would be
useful for Xen to maintain the "pagetable pages must be RO" constraint?
Or do you think that will...
2007 Apr 18
1
Is this a typo?
...e;
#ifdef CONFIG_X86_PAE
pmd_table = (pmd_t *) alloc_bootmem_low_pages(PAGE_SIZE);
paravirt_alloc_pmd(__pa(page_table) >> PAGE_SHIFT);
^^^^^^^^^^ pmd_table?
set_pgd(pgd, __pgd(__pa(pmd_table) | _PAGE_PRESENT));
pud = pud_offset(pgd, 0);
if (pmd_table != pmd_offset(pud, 0))
BUG();
#else
pud = pud_offset(pgd, 0);
pmd_table = pmd_offset(pud, 0);
#endif
return pmd_table;
}
Also, did you anticipate that these paravirt_alloc_* functions would be
useful for Xen to maintain the "pagetable pages must be RO" constraint?
Or do you think that will...
2008 May 15
0
[PATCH] linux/x86: utilize lookup_address() for virt_to_ptep()
...signed int nr, unsigned int feature);
void make_pages_writable(void *va, unsigned int nr, unsigned int feature);
-#define virt_to_ptep(__va) \
-({ \
- pgd_t *__pgd = pgd_offset_k((unsigned long)(__va)); \
- pud_t *__pud = pud_offset(__pgd, (unsigned long)(__va)); \
- pmd_t *__pmd = pmd_offset(__pud, (unsigned long)(__va)); \
- pte_offset_kernel(__pmd, (unsigned long)(__va)); \
-})
-
-#define arbitrary_virt_to_machine(__va) \
-({ \
- maddr_t m = (maddr_t)pte_mfn(*virt_to_ptep(__va)) << PAGE_SHIFT;\
- m | ((unsigned long)(__va) & (PAGE_SIZE-1)); \
-})
+#define vir...
2006 Mar 14
12
[RFC] VMI for Xen?
I''m sure everyone has seen the drop of VMI patches for Linux at this
point, but just in case, the link is included below.
I''ve read this version of the VMI spec and have made my way through most
of the patches. While I wasn''t really that impressed with the first
spec wrt Xen, the second version seems to be much more palatable.
Specifically, the code inlining and
2007 Apr 18
2
2.6.19-rc5-mm2: paravirt X86_PAE=y compile error
On Thu, 16 Nov 2006 00:16:26 +0100
Adrian Bunk <bunk@stusta.de> wrote:
> Paravirt breaks CONFIG_X86_PAE=y compilation:
>
> <-- snip -->
>
> ...
> CC init/main.o
> In file included from include2/asm/pgtable.h:245,
> from
> /home/bunk/linux/kernel-2.6/linux-2.6.19-rc5-mm2/include/linux/mm.h:40,
> from
>
2007 Apr 18
2
2.6.19-rc5-mm2: paravirt X86_PAE=y compile error
On Thu, 16 Nov 2006 00:16:26 +0100
Adrian Bunk <bunk@stusta.de> wrote:
> Paravirt breaks CONFIG_X86_PAE=y compilation:
>
> <-- snip -->
>
> ...
> CC init/main.o
> In file included from include2/asm/pgtable.h:245,
> from
> /home/bunk/linux/kernel-2.6/linux-2.6.19-rc5-mm2/include/linux/mm.h:40,
> from
>
2007 Apr 18
0
[PATCH 4/4] Pte simplify ops.patch
...rn res;
}
#ifdef CONFIG_SMP
diff -r b3bbc1b5e085 include/asm-i386/pgtable-3level.h
--- a/include/asm-i386/pgtable-3level.h Wed Apr 11 18:23:44 2007 -0700
+++ b/include/asm-i386/pgtable-3level.h Wed Apr 11 18:23:49 2007 -0700
@@ -139,16 +139,6 @@ static inline void pud_clear (pud_t * pu
#define pmd_offset(pud, address) ((pmd_t *) pud_page(*(pud)) + \
pmd_index(address))
-/* local pte updates need not use xchg for locking */
-static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep)
-{
- pte_t res;
-
- res = *ptep;
- native_pte_clear(NULL, 0, ptep);
- return res;
-}
-
#ifdef CONFIG_SMP...
2007 Apr 18
0
[PATCH 4/5] Add address translation
...Helper function that returns physical page for virtual address.
+ * This assumes the mapping is valid.
+ */
+#define virt_to_pfn(_address) \
+({ \
+ unsigned long long __paddr; \
+ pgd_t *pgd = pgd_offset_k(_address); \
+ pud_t *pud = pud_offset(pgd, (_address)); \
+ pmd_t *pmd = pmd_offset(pud, (_address)); \
+ if (pmd_large(*pmd)) \
+ __paddr = (pmd_val(*pmd) & LARGE_PAGE_MASK) | \
+ ((_address) & ~LARGE_PAGE_MASK); \
+ else { \
+ pte_t *pte = pte_offset_kernel(pmd, (_address));\
+ __paddr = (pte_val(*pte) & PAGE_MASK) | \
+ ((_address) & ~PAGE_MAS...
2007 Apr 18
0
[PATCH 4/5] Add address translation
...Helper function that returns physical page for virtual address.
+ * This assumes the mapping is valid.
+ */
+#define virt_to_pfn(_address) \
+({ \
+ unsigned long long __paddr; \
+ pgd_t *pgd = pgd_offset_k(_address); \
+ pud_t *pud = pud_offset(pgd, (_address)); \
+ pmd_t *pmd = pmd_offset(pud, (_address)); \
+ if (pmd_large(*pmd)) \
+ __paddr = (pmd_val(*pmd) & LARGE_PAGE_MASK) | \
+ ((_address) & ~LARGE_PAGE_MASK); \
+ else { \
+ pte_t *pte = pte_offset_kernel(pmd, (_address));\
+ __paddr = (pte_val(*pte) & PAGE_MASK) | \
+ ((_address) & ~PAGE_MAS...
2007 Apr 18
0
[PATCH 4/4] Pte simplify ops.patch
...rn res;
}
#ifdef CONFIG_SMP
diff -r b3bbc1b5e085 include/asm-i386/pgtable-3level.h
--- a/include/asm-i386/pgtable-3level.h Wed Apr 11 18:23:44 2007 -0700
+++ b/include/asm-i386/pgtable-3level.h Wed Apr 11 18:23:49 2007 -0700
@@ -139,16 +139,6 @@ static inline void pud_clear (pud_t * pu
#define pmd_offset(pud, address) ((pmd_t *) pud_page(*(pud)) + \
pmd_index(address))
-/* local pte updates need not use xchg for locking */
-static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep)
-{
- pte_t res;
-
- res = *ptep;
- native_pte_clear(NULL, 0, ptep);
- return res;
-}
-
#ifdef CONFIG_SMP...
2007 Apr 18
1
[PATCH 3/4] Pte xchg optimization.patch
...ine pte_none(x) (!(x).pte_low)
diff -r 47495b2532b3 include/asm-i386/pgtable-3level.h
--- a/include/asm-i386/pgtable-3level.h Wed Apr 11 18:23:01 2007 -0700
+++ b/include/asm-i386/pgtable-3level.h Wed Apr 11 18:23:05 2007 -0700
@@ -139,6 +139,17 @@ static inline void pud_clear (pud_t * pu
#define pmd_offset(pud, address) ((pmd_t *) pud_page(*(pud)) + \
pmd_index(address))
+/* local pte updates need not use xchg for locking */
+static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep)
+{
+ pte_t res;
+
+ res = *ptep;
+ native_pte_clear(NULL, 0, ptep);
+ return res;
+}
+
+#ifdef CONFIG_SMP...
2007 Apr 18
1
[PATCH 3/4] Pte xchg optimization.patch
...ine pte_none(x) (!(x).pte_low)
diff -r 47495b2532b3 include/asm-i386/pgtable-3level.h
--- a/include/asm-i386/pgtable-3level.h Wed Apr 11 18:23:01 2007 -0700
+++ b/include/asm-i386/pgtable-3level.h Wed Apr 11 18:23:05 2007 -0700
@@ -139,6 +139,17 @@ static inline void pud_clear (pud_t * pu
#define pmd_offset(pud, address) ((pmd_t *) pud_page(*(pud)) + \
pmd_index(address))
+/* local pte updates need not use xchg for locking */
+static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep)
+{
+ pte_t res;
+
+ res = *ptep;
+ native_pte_clear(NULL, 0, ptep);
+ return res;
+}
+
+#ifdef CONFIG_SMP...
2020 Apr 28
0
[PATCH v3 22/75] x86/boot/compressed/64: Add set_page_en/decrypted() helpers
...+ */
+ target = (unsigned long *)address;
+ scratch = *target;
+ arch_cmpxchg(target, scratch, scratch);
+
+ /*
+ * The page is mapped at least with PMD size - so skip checks and walk
+ * directly to the PMD.
+ */
+ p4dp = p4d_offset(pgdp, address);
+ pudp = pud_offset(p4dp, address);
+ pmdp = pmd_offset(pudp, address);
+
+ if (pmd_large(*pmdp))
+ ptep = split_large_pmd(info, pmdp, address);
+ else
+ ptep = pte_offset_kernel(pmdp, address);
+
+ if (!ptep)
+ return -ENOMEM;
+
+ /*
+ * Changing encryption attributes of a page requires to flush it from
+ * the caches.
+ */
+ if ((set | clr) &...
2008 Jun 19
0
[PATCH] ia64/xen: implement the arch specific part of xencomm.
...RNEL_TR_PAGE_SIZE))
+ return vaddr - kernel_virtual_offset;
+
+ /* In kernel area -- virtually mapped. */
+ pgd = pgd_offset_k(vaddr);
+ if (pgd_none(*pgd) || pgd_bad(*pgd))
+ return ~0UL;
+
+ pud = pud_offset(pgd, vaddr);
+ if (pud_none(*pud) || pud_bad(*pud))
+ return ~0UL;
+
+ pmd = pmd_offset(pud, vaddr);
+ if (pmd_none(*pmd) || pmd_bad(*pmd))
+ return ~0UL;
+
+ ptep = pte_offset_kernel(pmd, vaddr);
+ if (!ptep)
+ return ~0UL;
+
+ return (pte_val(*ptep) & _PFN_MASK) | (vaddr & ~PAGE_MASK);
+ }
+
+ if (vaddr > TASK_SIZE) {
+ /* percpu variables */
+ if (REGION_NUMBER...
2008 Jun 19
0
[PATCH] ia64/xen: implement the arch specific part of xencomm.
...RNEL_TR_PAGE_SIZE))
+ return vaddr - kernel_virtual_offset;
+
+ /* In kernel area -- virtually mapped. */
+ pgd = pgd_offset_k(vaddr);
+ if (pgd_none(*pgd) || pgd_bad(*pgd))
+ return ~0UL;
+
+ pud = pud_offset(pgd, vaddr);
+ if (pud_none(*pud) || pud_bad(*pud))
+ return ~0UL;
+
+ pmd = pmd_offset(pud, vaddr);
+ if (pmd_none(*pmd) || pmd_bad(*pmd))
+ return ~0UL;
+
+ ptep = pte_offset_kernel(pmd, vaddr);
+ if (!ptep)
+ return ~0UL;
+
+ return (pte_val(*ptep) & _PFN_MASK) | (vaddr & ~PAGE_MASK);
+ }
+
+ if (vaddr > TASK_SIZE) {
+ /* percpu variables */
+ if (REGION_NUMBER...
2007 Apr 18
0
[PATCH 1/5] Paravirt page alloc.patch
...6 +62,7 @@ static pmd_t * __init one_md_table_init(
#ifdef CONFIG_X86_PAE
pmd_table = (pmd_t *) alloc_bootmem_low_pages(PAGE_SIZE);
+ paravirt_alloc_pd(__pa(pmd_table) >> PAGE_SHIFT);
set_pgd(pgd, __pgd(__pa(pmd_table) | _PAGE_PRESENT));
pud = pud_offset(pgd, 0);
if (pmd_table != pmd_offset(pud, 0))
@@ -82,6 +83,7 @@ static pte_t * __init one_page_table_ini
{
if (pmd_none(*pmd)) {
pte_t *page_table = (pte_t *) alloc_bootmem_low_pages(PAGE_SIZE);
+ paravirt_alloc_pt(__pa(page_table) >> PAGE_SHIFT);
set_pmd(pmd, __pmd(__pa(page_table) | _PAGE_TABLE));
if (page_table...
2007 Apr 18
0
[PATCH 1/5] Paravirt page alloc.patch
...6 +62,7 @@ static pmd_t * __init one_md_table_init(
#ifdef CONFIG_X86_PAE
pmd_table = (pmd_t *) alloc_bootmem_low_pages(PAGE_SIZE);
+ paravirt_alloc_pd(__pa(pmd_table) >> PAGE_SHIFT);
set_pgd(pgd, __pgd(__pa(pmd_table) | _PAGE_PRESENT));
pud = pud_offset(pgd, 0);
if (pmd_table != pmd_offset(pud, 0))
@@ -82,6 +83,7 @@ static pte_t * __init one_page_table_ini
{
if (pmd_none(*pmd)) {
pte_t *page_table = (pte_t *) alloc_bootmem_low_pages(PAGE_SIZE);
+ paravirt_alloc_pt(__pa(page_table) >> PAGE_SHIFT);
set_pmd(pmd, __pmd(__pa(page_table) | _PAGE_TABLE));
if (page_table...
2007 Apr 18
0
[PATCH 1/6] Page allocation hooks for VMI backend
...6 +62,7 @@ static pmd_t * __init one_md_table_init(
#ifdef CONFIG_X86_PAE
pmd_table = (pmd_t *) alloc_bootmem_low_pages(PAGE_SIZE);
+ paravirt_alloc_pd(__pa(pmd_table) >> PAGE_SHIFT);
set_pgd(pgd, __pgd(__pa(pmd_table) | _PAGE_PRESENT));
pud = pud_offset(pgd, 0);
if (pmd_table != pmd_offset(pud, 0))
@@ -82,6 +83,7 @@ static pte_t * __init one_page_table_ini
{
if (pmd_none(*pmd)) {
pte_t *page_table = (pte_t *) alloc_bootmem_low_pages(PAGE_SIZE);
+ paravirt_alloc_pt(__pa(page_table) >> PAGE_SHIFT);
set_pmd(pmd, __pmd(__pa(page_table) | _PAGE_TABLE));
if (page_table...
2007 Apr 18
0
[PATCH 1/6] Page allocation hooks for VMI backend
...6 +62,7 @@ static pmd_t * __init one_md_table_init(
#ifdef CONFIG_X86_PAE
pmd_table = (pmd_t *) alloc_bootmem_low_pages(PAGE_SIZE);
+ paravirt_alloc_pd(__pa(pmd_table) >> PAGE_SHIFT);
set_pgd(pgd, __pgd(__pa(pmd_table) | _PAGE_PRESENT));
pud = pud_offset(pgd, 0);
if (pmd_table != pmd_offset(pud, 0))
@@ -82,6 +83,7 @@ static pte_t * __init one_page_table_ini
{
if (pmd_none(*pmd)) {
pte_t *page_table = (pte_t *) alloc_bootmem_low_pages(PAGE_SIZE);
+ paravirt_alloc_pt(__pa(page_table) >> PAGE_SHIFT);
set_pmd(pmd, __pmd(__pa(page_table) | _PAGE_TABLE));
if (page_table...
2011 Feb 09
8
reboot after "scrubbing free ram"
Hello,
I have some diagnostic Info for you. Tried to get xen-4.0.1 working on
another node of my cluster. Only difference: Newer revision of the
Hardware. Exactly same Software Stack.
Stack: Ubuntu Lucid 64bit, xen-4.0.1 from Source, selfbuilt
linux-2.6.32.27 from xen/stable-2.6.32.x
Nodes working: HP DL380G5 16GB (Intel X5460)
Node not working: HP DL380G6 16GB (Intel X5550)
Effect: Xen