search for: pmd_large

Hey folks, This is the part-of-pvops-implementation-that-is-not-exactly-a-merge. Neat, uh? This is the majority of the work. The first patch in the series does not really belong here. It was already sent to lkml separetedly before, but I'm including it again, for a very simple reason: Try to test the paravirt patches without it, and you'll fail miserably ;-) (and it was not yet

Hey folks, This is the part-of-pvops-implementation-that-is-not-exactly-a-merge. Neat, uh? This is the majority of the work. The first patch in the series does not really belong here. It was already sent to lkml separetedly before, but I'm including it again, for a very simple reason: Try to test the paravirt patches without it, and you'll fail miserably ;-) (and it was not yet

Hey folks, Here's a new spin of the pvops64 patch series. We didn't get that many comments from the last time, so it should be probably almost ready to get in. Heya! >From the last version, the most notable changes are: * consolidation of system.h, merging jeremy's comments about ordering concerns * consolidation of smp functions that goes through smp_ops. They're sharing

Hey folks, Here's a new spin of the pvops64 patch series. We didn't get that many comments from the last time, so it should be probably almost ready to get in. Heya! >From the last version, the most notable changes are: * consolidation of system.h, merging jeremy's comments about ordering concerns * consolidation of smp functions that goes through smp_ops. They're sharing

Here is an slightly updated version of the paravirt_ops patch. If your comments and criticism were welcome before, now it's even more! There are some issues that are _not_ addressed in this revision, and here are the causes: * split debugreg into multiple functions, suggested by Andi: - Me and jsfg agree that introducing more pvops (specially 14!) is not worthwhile. So, although we do

Here is an slightly updated version of the paravirt_ops patch. If your comments and criticism were welcome before, now it's even more! There are some issues that are _not_ addressed in this revision, and here are the causes: * split debugreg into multiple functions, suggested by Andi: - Me and jsfg agree that introducing more pvops (specially 14!) is not worthwhile. So, although we do

...AGE_SHIFT); - pte_val(pte) |= pgprot_val(pgprot); - pte_val(pte) &= __supported_pte_mask; - return pte; + unsigned long pte; + pte = (page_nr << PAGE_SHIFT); + pte |= pgprot_val(pgprot); + pte &= __supported_pte_mask; + return __pte(pte); } /* @@ -345,7 +356,6 @@ static inline int pmd_large(pmd_t pte) { pmd_index(address)) #define pmd_none(x) (!pmd_val(x)) #define pmd_present(x) (pmd_val(x) & _PAGE_PRESENT) -#define pmd_clear(xp) do { set_pmd(xp, __pmd(0)); } while (0) #define pfn_pmd(nr,prot) (__pmd(((nr) << PAGE_SHIFT) | pgprot_val(prot))) #define pmd_pfn(x) ((pmd...

...AGE_SHIFT); - pte_val(pte) |= pgprot_val(pgprot); - pte_val(pte) &= __supported_pte_mask; - return pte; + unsigned long pte; + pte = (page_nr << PAGE_SHIFT); + pte |= pgprot_val(pgprot); + pte &= __supported_pte_mask; + return __pte(pte); } /* @@ -345,7 +356,6 @@ static inline int pmd_large(pmd_t pte) { pmd_index(address)) #define pmd_none(x) (!pmd_val(x)) #define pmd_present(x) (pmd_val(x) & _PAGE_PRESENT) -#define pmd_clear(xp) do { set_pmd(xp, __pmd(0)); } while (0) #define pfn_pmd(nr,prot) (__pmd(((nr) << PAGE_SHIFT) | pgprot_val(prot))) #define pmd_pfn(x) ((pmd...

This is hopefully the last iteration of the pvops64 patch. >From the last version, we have only one change, which is include/asm-x86_64/processor.h: There were still one survivor in raw asm. Also, git screwed me up for some reason, and the 25th patch was missing the new files, paravirt.{c,h}. (although I do remember having git-add'ed it, but who knows...) Andrew, could you please push it

This is hopefully the last iteration of the pvops64 patch. >From the last version, we have only one change, which is include/asm-x86_64/processor.h: There were still one survivor in raw asm. Also, git screwed me up for some reason, and the 25th patch was missing the new files, paravirt.{c,h}. (although I do remember having git-add'ed it, but who knows...) Andrew, could you please push it

...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_MASK); \ + } \ + __paddr >>...

...=========================================================== --- linux-2.6.13.orig/arch/i386/mm/pageattr.c 2005-08-31 14:41:45.000000000 -0700 +++ linux-2.6.13/arch/i386/mm/pageattr.c 2005-08-31 14:41:49.000000000 -0700 @@ -33,7 +33,7 @@ pte_t *lookup_address(unsigned long addr return NULL; if (pmd_large(*pmd)) return (pte_t *)pmd; - return pte_offset_kernel(pmd, address); + return pte_offset_kernel(pmd, address); } static struct page *split_large_page(unsigned long address, pgprot_t prot) @@ -54,8 +54,8 @@ static struct page *split_large_page(uns pbase = (pte_t *)page_address(base...

...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_MASK); \ + } \ + __paddr >>...

...=========================================================== --- linux-2.6.13.orig/arch/i386/mm/pageattr.c 2005-08-31 14:41:45.000000000 -0700 +++ linux-2.6.13/arch/i386/mm/pageattr.c 2005-08-31 14:41:49.000000000 -0700 @@ -33,7 +33,7 @@ pte_t *lookup_address(unsigned long addr return NULL; if (pmd_large(*pmd)) return (pte_t *)pmd; - return pte_offset_kernel(pmd, address); + return pte_offset_kernel(pmd, address); } static struct page *split_large_page(unsigned long address, pgprot_t prot) @@ -54,8 +54,8 @@ static struct page *split_large_page(uns pbase = (pte_t *)page_address(base...

...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) & _PAGE_ENC) + clflush_page(addre...

...AGE_SHIFT); - pte_val(pte) |= pgprot_val(pgprot); - pte_val(pte) &= __supported_pte_mask; - return pte; + unsigned long pte; + pte = (page_nr << PAGE_SHIFT); + pte |= pgprot_val(pgprot); + pte &= __supported_pte_mask; + return __pte(pte); } /* @@ -345,7 +354,6 @@ static inline int pmd_large(pmd_t pte) { pmd_index(address)) #define pmd_none(x) (!pmd_val(x)) #define pmd_present(x) (pmd_val(x) & _PAGE_PRESENT) -#define pmd_clear(xp) do { set_pmd(xp, __pmd(0)); } while (0) #define pfn_pmd(nr,prot) (__pmd(((nr) << PAGE_SHIFT) | pgprot_val(prot))) #define pmd_pfn(x) ((pmd...

...AGE_SHIFT); - pte_val(pte) |= pgprot_val(pgprot); - pte_val(pte) &= __supported_pte_mask; - return pte; + unsigned long pte; + pte = (page_nr << PAGE_SHIFT); + pte |= pgprot_val(pgprot); + pte &= __supported_pte_mask; + return __pte(pte); } /* @@ -345,7 +354,6 @@ static inline int pmd_large(pmd_t pte) { pmd_index(address)) #define pmd_none(x) (!pmd_val(x)) #define pmd_present(x) (pmd_val(x) & _PAGE_PRESENT) -#define pmd_clear(xp) do { set_pmd(xp, __pmd(0)); } while (0) #define pfn_pmd(nr,prot) (__pmd(((nr) << PAGE_SHIFT) | pgprot_val(prot))) #define pmd_pfn(x) ((pmd...

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

Hi, here is the first public post of the patch-set to enable Linux to run under SEV-ES enabled hypervisors. The code is mostly feature-complete, but there are still a couple of bugs to fix. Nevertheless, given the size of the patch-set, I think it is about time to ask for initial feedback of the changes that come with it. To better understand the code here is a quick explanation of SEV-ES first.

Hi, here is the first public post of the patch-set to enable Linux to run under SEV-ES enabled hypervisors. The code is mostly feature-complete, but there are still a couple of bugs to fix. Nevertheless, given the size of the patch-set, I think it is about time to ask for initial feedback of the changes that come with it. To better understand the code here is a quick explanation of SEV-ES first.