Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756760AbYANWTV (ORCPT ); Mon, 14 Jan 2008 17:19:21 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752220AbYANWQo (ORCPT ); Mon, 14 Jan 2008 17:16:44 -0500 Received: from ns1.suse.de ([195.135.220.2]:59682 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755425AbYANWQl (ORCPT ); Mon, 14 Jan 2008 17:16:41 -0500 From: Andi Kleen References: <200801141116.534682000@suse.de> In-Reply-To: <200801141116.534682000@suse.de> To: linux-kernel@vger.kernel.org, jbeulich@novell.com, mingo@elte.hu, tglx@linutronix.de Subject: [PATCH] [8/31] CPA: Return the page table level in lookup_address() Message-Id: <20080114221640.437A514F83@wotan.suse.de> Date: Mon, 14 Jan 2008 23:16:40 +0100 (CET) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5751 Lines: 189 Needed for the next change. And change all the callers. Signed-off-by: Andi Kleen --- arch/x86/mm/fault_32.c | 3 ++- arch/x86/mm/init_32.c | 3 ++- arch/x86/mm/pageattr_32.c | 7 +++++-- arch/x86/mm/pageattr_64.c | 7 +++++-- arch/x86/xen/mmu.c | 9 ++++++--- include/asm-x86/pgtable_32.h | 2 +- include/asm-x86/pgtable_64.h | 2 +- 7 files changed, 22 insertions(+), 11 deletions(-) Index: linux/arch/x86/mm/pageattr_64.c =================================================================== --- linux.orig/arch/x86/mm/pageattr_64.c +++ linux/arch/x86/mm/pageattr_64.c @@ -13,7 +13,7 @@ #include #include -pte_t *lookup_address(unsigned long address) +pte_t *lookup_address(unsigned long address, int *level) { pgd_t *pgd = pgd_offset_k(address); pud_t *pud; @@ -27,8 +27,10 @@ pte_t *lookup_address(unsigned long addr pmd = pmd_offset(pud, address); if (!pmd_present(*pmd)) return NULL; + *level = 3; if (pmd_large(*pmd)) return (pte_t *)pmd; + *level = 4; pte = pte_offset_kernel(pmd, address); if (pte && !pte_present(*pte)) pte = NULL; @@ -129,8 +131,9 @@ __change_page_attr(unsigned long address pte_t *kpte; struct page *kpte_page; pgprot_t ref_prot2; + int level; - kpte = lookup_address(address); + kpte = lookup_address(address, &level); if (!kpte) return 0; kpte_page = virt_to_page(((unsigned long)kpte) & PAGE_MASK); BUG_ON(PageLRU(kpte_page)); Index: linux/include/asm-x86/pgtable_64.h =================================================================== --- linux.orig/include/asm-x86/pgtable_64.h +++ linux/include/asm-x86/pgtable_64.h @@ -240,7 +240,7 @@ extern struct list_head pgd_list; extern int kern_addr_valid(unsigned long addr); -pte_t *lookup_address(unsigned long addr); +pte_t *lookup_address(unsigned long addr, int *level); #define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \ remap_pfn_range(vma, vaddr, pfn, size, prot) Index: linux/arch/x86/mm/pageattr_32.c =================================================================== --- linux.orig/arch/x86/mm/pageattr_32.c +++ linux/arch/x86/mm/pageattr_32.c @@ -18,7 +18,7 @@ static DEFINE_SPINLOCK(cpa_lock); static struct list_head df_list = LIST_HEAD_INIT(df_list); -pte_t *lookup_address(unsigned long address) +pte_t *lookup_address(unsigned long address, int *level) { pgd_t *pgd = pgd_offset_k(address); pud_t *pud; @@ -31,8 +31,10 @@ pte_t *lookup_address(unsigned long addr pmd = pmd_offset(pud, address); if (pmd_none(*pmd)) return NULL; + *level = 2; if (pmd_large(*pmd)) return (pte_t *)pmd; + *level = 3; return pte_offset_kernel(pmd, address); } @@ -148,11 +150,12 @@ __change_page_attr(struct page *page, pg pte_t *kpte; unsigned long address; struct page *kpte_page; + int level; BUG_ON(PageHighMem(page)); address = (unsigned long)page_address(page); - kpte = lookup_address(address); + kpte = lookup_address(address, &level); if (!kpte) return -EINVAL; kpte_page = virt_to_page(kpte); Index: linux/include/asm-x86/pgtable_32.h =================================================================== --- linux.orig/include/asm-x86/pgtable_32.h +++ linux/include/asm-x86/pgtable_32.h @@ -182,7 +182,7 @@ static inline void clone_pgd_range(pgd_t * NOTE: the return type is pte_t but if the pmd is PSE then we return it * as a pte too. */ -extern pte_t *lookup_address(unsigned long address); +extern pte_t *lookup_address(unsigned long address, int *level); /* * Make a given kernel text page executable/non-executable. Index: linux/arch/x86/mm/fault_32.c =================================================================== --- linux.orig/arch/x86/mm/fault_32.c +++ linux/arch/x86/mm/fault_32.c @@ -571,7 +571,8 @@ no_context: #ifdef CONFIG_X86_PAE if (error_code & PF_INSTR) { - pte_t *pte = lookup_address(address); + int level; + pte_t *pte = lookup_address(address, &level); if (pte && pte_present(*pte) && !pte_exec_kernel(*pte)) printk(KERN_CRIT "kernel tried to execute " Index: linux/arch/x86/mm/init_32.c =================================================================== --- linux.orig/arch/x86/mm/init_32.c +++ linux/arch/x86/mm/init_32.c @@ -529,11 +529,12 @@ int __init set_kernel_exec(unsigned long { pte_t *pte; int ret = 1; + int level; if (!nx_enabled) goto out; - pte = lookup_address(vaddr); + pte = lookup_address(vaddr, &level); BUG_ON(!pte); if (!pte_exec_kernel(*pte)) Index: linux/arch/x86/xen/mmu.c =================================================================== --- linux.orig/arch/x86/xen/mmu.c +++ linux/arch/x86/xen/mmu.c @@ -58,7 +58,8 @@ xmaddr_t arbitrary_virt_to_machine(unsigned long address) { - pte_t *pte = lookup_address(address); + int level; + pte_t *pte = lookup_address(address, &level); unsigned offset = address & PAGE_MASK; BUG_ON(pte == NULL); @@ -70,8 +71,9 @@ void make_lowmem_page_readonly(void *vad { pte_t *pte, ptev; unsigned long address = (unsigned long)vaddr; + int level; - pte = lookup_address(address); + pte = lookup_address(address, &level); BUG_ON(pte == NULL); ptev = pte_wrprotect(*pte); @@ -84,8 +86,9 @@ void make_lowmem_page_readwrite(void *va { pte_t *pte, ptev; unsigned long address = (unsigned long)vaddr; + int level; - pte = lookup_address(address); + pte = lookup_address(address, &level); BUG_ON(pte == NULL); ptev = pte_mkwrite(*pte); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/