search for: pmds

...it phys_pmd_init(pmd_t *pmd, unsigned long address, unsigned long end) @@ -648,9 +670,9 @@ void __init extend_init_mapping(unsigned } } -static void __init find_early_table_space(unsigned long end) +static unsigned long __init find_early_table_space(unsigned long end) { - unsigned long puds, pmds, ptes, tables; + unsigned long puds, pmds, ptes, tables, fixmap_tables; puds = (end + PUD_SIZE - 1) >> PUD_SHIFT; pmds = (end + PMD_SIZE - 1) >> PMD_SHIFT; @@ -660,7 +682,16 @@ static void __init find_early_table_spac round_up(pmds * 8, PAGE_SIZE) + round_up(ptes * 8, PAGE...

...is overkill here. */ - native_set_pmd(&pmd, __pmd(((unsigned long)(linear + i) - - mem_base) | _PAGE_PRESENT | _PAGE_RW | _PAGE_USER)); + pmd = pfn_pmd(((unsigned long)&linear[i] - mem_base)/PAGE_SIZE, + __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER)); if (copy_to_user(&pmds[j], &pmd, sizeof(pmd)) != 0) return -EFAULT; } /* One PGD entry, pointing to that PMD page. */ - set_pgd(&pgd, __pgd(((u32)pmds - mem_base) | _PAGE_PRESENT)); + pgd = __pgd(((unsigned long)pmds - mem_base) | _PAGE_PRESENT); /* Copy it in as the first PGD entry (ie. addresses 0-1...

...is overkill here. */ - native_set_pmd(&pmd, __pmd(((unsigned long)(linear + i) - - mem_base) | _PAGE_PRESENT | _PAGE_RW | _PAGE_USER)); + pmd = pfn_pmd(((unsigned long)&linear[i] - mem_base)/PAGE_SIZE, + __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER)); if (copy_to_user(&pmds[j], &pmd, sizeof(pmd)) != 0) return -EFAULT; } /* One PGD entry, pointing to that PMD page. */ - set_pgd(&pgd, __pgd(((u32)pmds - mem_base) | _PAGE_PRESENT)); + pgd = __pgd(((unsigned long)pmds - mem_base) | _PAGE_PRESENT); /* Copy it in as the first PGD entry (ie. addresses 0-1...

Hi, This set of patches contains initial kexec/kdump implementation for Xen v3. Currently only dom0 is supported, however, almost all infrustructure required for domU support is ready. Jan Beulich suggested to merge Xen x86 assembler code with baremetal x86 code. This could simplify and reduce a bit size of kernel code. However, this solution requires some changes in baremetal x86 code. First of

Hi, This set of patches contains initial kexec/kdump implementation for Xen v3. Currently only dom0 is supported, however, almost all infrustructure required for domU support is ready. Jan Beulich suggested to merge Xen x86 assembler code with baremetal x86 code. This could simplify and reduce a bit size of kernel code. However, this solution requires some changes in baremetal x86 code. First of

Hi, This set of patches contains initial kexec/kdump implementation for Xen v3. Currently only dom0 is supported, however, almost all infrustructure required for domU support is ready. Jan Beulich suggested to merge Xen x86 assembler code with baremetal x86 code. This could simplify and reduce a bit size of kernel code. However, this solution requires some changes in baremetal x86 code. First of

...++++++++++++++ 1 files changed, 47 insertions(+), 0 deletions(-) diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c index e72c9f8..a7ee16b 100644 --- a/arch/x86/mm/init.c +++ b/arch/x86/mm/init.c @@ -33,6 +33,9 @@ static void __init find_early_table_space(unsigned long start, { unsigned long pmds = 0, ptes = 0, tables = 0, good_end = end, pud_mapped = 0, pmd_mapped = 0, size = end - start; + int kmap_begin_pmd_idx, kmap_end_pmd_idx; + int fixmap_begin_pmd_idx, fixmap_end_pmd_idx; + int btmap_begin_pmd_idx; phys_addr_t base; pud_mapped = DIV_ROUND_UP(PFN_PHYS(max_pfn_mapped), @@...

...entry's not present, there's nothing to release. */ + if (pgd_flags(*spgd) & _PAGE_PRESENT) { + unsigned int i; + pmd_t *pmdpage = __va(pgd_pfn(*spgd) << PAGE_SHIFT); + + for (i = 0; i < PTRS_PER_PMD; i++) + release_pmd(&pmdpage[i]); + + /* Now we can free the page of PMDs */ + free_page((long)pmdpage); + /* And zero out the PGD entry so we never release it twice. */ + set_pgd(spgd, __pgd(0)); + } +} + +#else /* !CONFIG_X86_PAE */ /*H:450 If we chase down the release_pgd() code, it looks like this: */ static void release_pgd(pgd_t *spgd) { @@ -341,7 +494,7 @@ s...

...entry's not present, there's nothing to release. */ + if (pgd_flags(*spgd) & _PAGE_PRESENT) { + unsigned int i; + pmd_t *pmdpage = __va(pgd_pfn(*spgd) << PAGE_SHIFT); + + for (i = 0; i < PTRS_PER_PMD; i++) + release_pmd(&pmdpage[i]); + + /* Now we can free the page of PMDs */ + free_page((long)pmdpage); + /* And zero out the PGD entry so we never release it twice. */ + set_pgd(spgd, __pgd(0)); + } +} + +#else /* !CONFIG_X86_PAE */ /*H:450 If we chase down the release_pgd() code, it looks like this: */ static void release_pgd(pgd_t *spgd) { @@ -341,7 +494,7 @@ s...

...ntry's not present, there's nothing to release. */ + if (pgd_flags(*spgd) & _PAGE_PRESENT) { + unsigned int i; + pmd_t *pmdpage = __va(pgd_pfn(*spgd) << PAGE_SHIFT); + + for (i = 0; i < PTRS_PER_PMD; i++) + release_pmd(&pmdpage[i]); + + /* Now we can free the page of PMDs */ + free_page((long)pmdpage); + /* And zero out the PGD entry so we never release it twice. */ + native_set_pud ((pud_t *)spgd, __pud(0)); + } +} + +#else /* !CONFIG_X86_PAE */ + /*H:450 If we chase down the release_pgd() code, it looks like this: */ -static void release_pgd(struct lguest *lg,...

...ntry's not present, there's nothing to release. */ + if (pgd_flags(*spgd) & _PAGE_PRESENT) { + unsigned int i; + pmd_t *pmdpage = __va(pgd_pfn(*spgd) << PAGE_SHIFT); + + for (i = 0; i < PTRS_PER_PMD; i++) + release_pmd(&pmdpage[i]); + + /* Now we can free the page of PMDs */ + free_page((long)pmdpage); + /* And zero out the PGD entry so we never release it twice. */ + native_set_pud ((pud_t *)spgd, __pud(0)); + } +} + +#else /* !CONFIG_X86_PAE */ + /*H:450 If we chase down the release_pgd() code, it looks like this: */ -static void release_pgd(struct lguest *lg,...

...el.h +++ b/include/asm-m32r/pgtable-2level.h @@ -44,7 +44,7 @@ static inline int pgd_present(pgd_t pgd) */ #define set_pte(pteptr, pteval) (*(pteptr) = pteval) #define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval) -#define set_pte_atomic(pteptr, pteval) set_pte(pteptr, pteval) + /* * (pmds are folded into pgds so this doesnt get actually called, * but the define is needed for a generic inline function.)

...pmd that holds the pte. And if needed, we can find the pud that holds the pmd, and the pgd/cr3 that holds the pud. This facilitates the managing of the page tables. TODO: ===== To prevent a guest from stealing all the hosts memory pages, we can use these hashes to also limit the number of puds, pmds, and ptes. If the page is not pinned (currently used), we can set up LRU lists, and find those pages that are somewhat stale, and free them. This can be done safely since we have all the info we need to put them back if the guest needs them again. cr3: ==== Right now we hold many more cr3/pgd&...

...pmd that holds the pte. And if needed, we can find the pud that holds the pmd, and the pgd/cr3 that holds the pud. This facilitates the managing of the page tables. TODO: ===== To prevent a guest from stealing all the hosts memory pages, we can use these hashes to also limit the number of puds, pmds, and ptes. If the page is not pinned (currently used), we can set up LRU lists, and find those pages that are somewhat stale, and free them. This can be done safely since we have all the info we need to put them back if the guest needs them again. cr3: ==== Right now we hold many more cr3/pgd&...

...= 1) { + mach_setup_pgd(__pa(pgd) >> PAGE_SHIFT, + __pa(swapper_pg_dir) >> PAGE_SHIFT, + USER_PTRS_PER_PGD, + PTRS_PER_PGD - USER_PTRS_PER_PGD); + return pgd; + } + + /* PAE mode will set up the pmds here */ + mach_setup_pgd(__pa(pgd) >> PAGE_SHIFT, + __pa(swapper_pg_dir) >> PAGE_SHIFT, + USER_PTRS_PER_PGD, + PTRS_PER_PGD - USER_PTRS_PER_PGD); for (i = 0; i < USER_PTRS_PER_PGD; ++i) { pmd_t *pmd = kmem_cache_a...

...= 1) { + mach_setup_pgd(__pa(pgd) >> PAGE_SHIFT, + __pa(swapper_pg_dir) >> PAGE_SHIFT, + USER_PTRS_PER_PGD, + PTRS_PER_PGD - USER_PTRS_PER_PGD); + return pgd; + } + + /* PAE mode will set up the pmds here */ + mach_setup_pgd(__pa(pgd) >> PAGE_SHIFT, + __pa(swapper_pg_dir) >> PAGE_SHIFT, + USER_PTRS_PER_PGD, + PTRS_PER_PGD - USER_PTRS_PER_PGD); for (i = 0; i < USER_PTRS_PER_PGD; ++i) { pmd_t *pmd = kmem_cache_a...

...xc418) vector 59 ACPI: PCI interrupt 0000:12:01.0[A] -> GSI 120 (level, low) -> IRQ 59 GSI 143 (level, low) -> CPU 2 (0xc418) vector 60 ACPI: PCI interrupt 0000:12:1f.0[A] -> GSI 143 (level, low) -> IRQ 60 perfmon: version 2.0 IRQ 238 perfmon: Itanium 2 PMU detected, 16 PMCs, 18 PMDs, 4 counters (47 bits) PAL Information Facility v0.5 perfmon: added sampling format default_format perfmon_default_smpl: default_format v2.0 registered Total HugeTLB memory allocated, 0 Installing knfsd (copyright (C) 1996 okir at monad.swb.de). udf: registering filesystem Initializing Crypto...

..._vma); } end = -1; mapping = NULL; - anon_vma_lock_write(anon_vma); } else { mapping = head->mapping; @@ -2686,13 +2719,19 @@ int split_huge_page_to_list(struct page *page, struct list_head *list) /* * Racy check if we can split the page, before unmap_page() will * split PMDs + * If we are splitting a migrating THP, there is no check needed + * because the page is already unmapped and isolated from the LRU. */ - if (!can_split_huge_page(head, &extra_pins)) { + if (!remap) + extra_pins = thp_nr_pages(page) - 1 + + is_device_private_page(head); + else if (!can...

Hi all, This little series adds a new transaction-like abstraction for doing RMW updates to a pte, hooks it into paravirt_ops, and then makes use of it in Xen. The basic problem is that mprotect is very slow under Xen (up to 50x slower than native), primarily because of the ptent = ptep_get_and_clear(mm, addr, pte); ptent = pte_modify(ptent, newprot); /* ... */ set_pte_at(mm, addr, pte,

Hi all, This little series adds a new transaction-like abstraction for doing RMW updates to a pte, hooks it into paravirt_ops, and then makes use of it in Xen. The basic problem is that mprotect is very slow under Xen (up to 50x slower than native), primarily because of the ptent = ptep_get_and_clear(mm, addr, pte); ptent = pte_modify(ptent, newprot); /* ... */ set_pte_at(mm, addr, pte,