From: Toshi Kani <toshi.kani@hp.com> To: akpm@linux-foundation.org, hpa@zytor.com, tglx@linutronix.de, mingo@redhat.com, arnd@arndb.de Cc: linux-mm@kvack.org, x86@kernel.org, linux-kernel@vger.kernel.org, Elliott@hp.com, Toshi Kani <toshi.kani@hp.com> Subject: [PATCH v2 5/7] x86, mm: Support huge KVA mappings on x86 Date: Mon, 9 Feb 2015 15:45:33 -0700 [thread overview] Message-ID: <1423521935-17454-6-git-send-email-toshi.kani@hp.com> (raw) In-Reply-To: <1423521935-17454-1-git-send-email-toshi.kani@hp.com> Implement huge KVA mapping interfaces on x86. Select HAVE_ARCH_HUGE_VMAP when X86_64 or X86_32 with X86_PAE is set. Without X86_PAE set, the X86_32 kernel has the 2-level page tables and cannot provide the huge KVA mappings. Signed-off-by: Toshi Kani <toshi.kani@hp.com> --- arch/x86/Kconfig | 1 + arch/x86/mm/pgtable.c | 34 ++++++++++++++++++++++++++++++++++ 2 files changed, 35 insertions(+) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 0dc9d01..a79e286 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -97,6 +97,7 @@ config X86 select IRQ_FORCED_THREADING select HAVE_BPF_JIT if X86_64 select HAVE_ARCH_TRANSPARENT_HUGEPAGE + select HAVE_ARCH_HUGE_VMAP if X86_64 || (X86_32 && X86_PAE) select ARCH_HAS_SG_CHAIN select CLKEVT_I8253 select ARCH_HAVE_NMI_SAFE_CMPXCHG diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c index 6fb6927..e495432 100644 --- a/arch/x86/mm/pgtable.c +++ b/arch/x86/mm/pgtable.c @@ -481,3 +481,37 @@ void native_set_fixmap(enum fixed_addresses idx, phys_addr_t phys, { __native_set_fixmap(idx, pfn_pte(phys >> PAGE_SHIFT, flags)); } + +#ifdef CONFIG_HAVE_ARCH_HUGE_VMAP +void pud_set_huge(pud_t *pud, phys_addr_t addr, pgprot_t prot) +{ + set_pte((pte_t *)pud, pfn_pte( + (u64)addr >> PAGE_SHIFT, + __pgprot(pgprot_val(prot) | _PAGE_PSE))); +} + +void pmd_set_huge(pmd_t *pmd, phys_addr_t addr, pgprot_t prot) +{ + set_pte((pte_t *)pmd, pfn_pte( + (u64)addr >> PAGE_SHIFT, + __pgprot(pgprot_val(prot) | _PAGE_PSE))); +} + +int pud_clear_huge(pud_t *pud) +{ + if (pud_large(*pud)) { + pud_clear(pud); + return 1; + } + return 0; +} + +int pmd_clear_huge(pmd_t *pmd) +{ + if (pmd_large(*pmd)) { + pmd_clear(pmd); + return 1; + } + return 0; +} +#endif /* CONFIG_HAVE_ARCH_HUGE_VMAP */
WARNING: multiple messages have this Message-ID (diff)
From: Toshi Kani <toshi.kani@hp.com> To: akpm@linux-foundation.org, hpa@zytor.com, tglx@linutronix.de, mingo@redhat.com, arnd@arndb.de Cc: linux-mm@kvack.org, x86@kernel.org, linux-kernel@vger.kernel.org, Elliott@hp.com, Toshi Kani <toshi.kani@hp.com> Subject: [PATCH v2 5/7] x86, mm: Support huge KVA mappings on x86 Date: Mon, 9 Feb 2015 15:45:33 -0700 [thread overview] Message-ID: <1423521935-17454-6-git-send-email-toshi.kani@hp.com> (raw) In-Reply-To: <1423521935-17454-1-git-send-email-toshi.kani@hp.com> Implement huge KVA mapping interfaces on x86. Select HAVE_ARCH_HUGE_VMAP when X86_64 or X86_32 with X86_PAE is set. Without X86_PAE set, the X86_32 kernel has the 2-level page tables and cannot provide the huge KVA mappings. Signed-off-by: Toshi Kani <toshi.kani@hp.com> --- arch/x86/Kconfig | 1 + arch/x86/mm/pgtable.c | 34 ++++++++++++++++++++++++++++++++++ 2 files changed, 35 insertions(+) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 0dc9d01..a79e286 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -97,6 +97,7 @@ config X86 select IRQ_FORCED_THREADING select HAVE_BPF_JIT if X86_64 select HAVE_ARCH_TRANSPARENT_HUGEPAGE + select HAVE_ARCH_HUGE_VMAP if X86_64 || (X86_32 && X86_PAE) select ARCH_HAS_SG_CHAIN select CLKEVT_I8253 select ARCH_HAVE_NMI_SAFE_CMPXCHG diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c index 6fb6927..e495432 100644 --- a/arch/x86/mm/pgtable.c +++ b/arch/x86/mm/pgtable.c @@ -481,3 +481,37 @@ void native_set_fixmap(enum fixed_addresses idx, phys_addr_t phys, { __native_set_fixmap(idx, pfn_pte(phys >> PAGE_SHIFT, flags)); } + +#ifdef CONFIG_HAVE_ARCH_HUGE_VMAP +void pud_set_huge(pud_t *pud, phys_addr_t addr, pgprot_t prot) +{ + set_pte((pte_t *)pud, pfn_pte( + (u64)addr >> PAGE_SHIFT, + __pgprot(pgprot_val(prot) | _PAGE_PSE))); +} + +void pmd_set_huge(pmd_t *pmd, phys_addr_t addr, pgprot_t prot) +{ + set_pte((pte_t *)pmd, pfn_pte( + (u64)addr >> PAGE_SHIFT, + __pgprot(pgprot_val(prot) | _PAGE_PSE))); +} + +int pud_clear_huge(pud_t *pud) +{ + if (pud_large(*pud)) { + pud_clear(pud); + return 1; + } + return 0; +} + +int pmd_clear_huge(pmd_t *pmd) +{ + if (pmd_large(*pmd)) { + pmd_clear(pmd); + return 1; + } + return 0; +} +#endif /* CONFIG_HAVE_ARCH_HUGE_VMAP */ -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2015-02-09 22:46 UTC|newest] Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top 2015-02-09 22:45 [PATCH v2 0/7] Kernel huge I/O mapping support Toshi Kani 2015-02-09 22:45 ` Toshi Kani 2015-02-09 22:45 ` [PATCH v2 1/7] mm: Change __get_vm_area_node() to use fls_long() Toshi Kani 2015-02-09 22:45 ` Toshi Kani 2015-02-09 22:45 ` [PATCH v2 2/7] lib: Add huge I/O map capability interfaces Toshi Kani 2015-02-09 22:45 ` Toshi Kani 2015-02-09 22:45 ` [PATCH v2 3/7] mm: Change ioremap to set up huge I/O mappings Toshi Kani 2015-02-09 22:45 ` Toshi Kani 2015-02-09 22:45 ` [PATCH v2 4/7] mm: Change vunmap to tear down huge KVA mappings Toshi Kani 2015-02-09 22:45 ` Toshi Kani 2015-02-09 22:45 ` Toshi Kani [this message] 2015-02-09 22:45 ` [PATCH v2 5/7] x86, mm: Support huge KVA mappings on x86 Toshi Kani 2015-02-10 18:59 ` Dave Hansen 2015-02-10 18:59 ` Dave Hansen 2015-02-10 20:42 ` Toshi Kani 2015-02-10 20:42 ` Toshi Kani 2015-02-10 20:51 ` Dave Hansen 2015-02-10 20:51 ` Dave Hansen 2015-02-10 22:13 ` Toshi Kani 2015-02-10 22:13 ` Toshi Kani 2015-02-10 22:20 ` Toshi Kani 2015-02-10 22:20 ` Toshi Kani 2015-02-10 23:10 ` Toshi Kani 2015-02-10 23:10 ` Toshi Kani 2015-03-03 0:37 ` Toshi Kani 2015-03-03 0:37 ` Toshi Kani 2015-02-09 22:45 ` [PATCH v2 6/7] x86, mm: Support huge I/O " Toshi Kani 2015-02-09 22:45 ` Toshi Kani 2015-02-18 20:44 ` Ingo Molnar 2015-02-18 20:44 ` Ingo Molnar 2015-02-18 21:13 ` Toshi Kani 2015-02-18 21:13 ` Toshi Kani 2015-02-18 21:15 ` Ingo Molnar 2015-02-18 21:15 ` Ingo Molnar 2015-02-18 21:33 ` Toshi Kani 2015-02-18 21:33 ` Toshi Kani 2015-02-18 21:57 ` Ingo Molnar 2015-02-18 21:57 ` Ingo Molnar 2015-02-18 22:14 ` Toshi Kani 2015-02-18 22:14 ` Toshi Kani 2015-02-09 22:45 ` [PATCH v2 7/7] mm: Add config HUGE_IOMAP to enable huge I/O mappings Toshi Kani 2015-02-09 22:45 ` Toshi Kani 2015-02-23 20:22 ` [PATCH v2 0/7] Kernel huge I/O mapping support Andrew Morton 2015-02-23 20:22 ` Andrew Morton 2015-02-23 23:54 ` Toshi Kani 2015-02-23 23:54 ` Toshi Kani 2015-02-24 8:09 ` Ingo Molnar 2015-02-24 8:09 ` Ingo Molnar 2015-03-02 15:51 ` Toshi Kani 2015-03-02 15:51 ` Toshi Kani
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