Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756233AbdLOKUI (ORCPT ); Fri, 15 Dec 2017 05:20:08 -0500 Received: from mail.linuxfoundation.org ([140.211.169.12]:35492 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932116AbdLOJu1 (ORCPT ); Fri, 15 Dec 2017 04:50:27 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Ben Hutchings , Matt Fleming , Borislav Petkov , Andrew Morton , Andy Lutomirski , Andy Lutomirski , Ard Biesheuvel , Borislav Petkov , Brian Gerst , Dave Jones , Denys Vlasenko , "H. Peter Anvin" , Linus Torvalds , Peter Zijlstra , Sai Praneeth Prakhya , Stephen Smalley , Thomas Gleixner , Toshi Kani , linux-efi@vger.kernel.org, Ingo Molnar , "Ghannam, Yazen" Subject: [PATCH 4.4 103/105] Revert "x86/mm/pat: Ensure cpa->pfn only contains page frame numbers" Date: Fri, 15 Dec 2017 10:45:41 +0100 Message-Id: <20171215092311.347628971@linuxfoundation.org> X-Mailer: git-send-email 2.15.1 In-Reply-To: <20171215092305.994559179@linuxfoundation.org> References: <20171215092305.994559179@linuxfoundation.org> User-Agent: quilt/0.65 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4555 Lines: 138 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Greg Kroah-Hartman This reverts commit 87e2bd898d3a79a8c609f183180adac47879a2a4 which is commit edc3b9129cecd0f0857112136f5b8b1bc1d45918 upstream. Turns there was too many other issues with this patch to make it viable for the stable tree. Reported-by: Ben Hutchings Cc: Matt Fleming Cc: Borislav Petkov Cc: Andrew Morton Cc: Andy Lutomirski Cc: Andy Lutomirski Cc: Ard Biesheuvel Cc: Borislav Petkov Cc: Brian Gerst Cc: Dave Jones Cc: Denys Vlasenko Cc: H. Peter Anvin Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Sai Praneeth Prakhya Cc: Stephen Smalley Cc: Thomas Gleixner Cc: Toshi Kani Cc: linux-efi@vger.kernel.org Cc: Ingo Molnar Cc: "Ghannam, Yazen" Signed-off-by: Greg Kroah-Hartman --- arch/x86/mm/pageattr.c | 17 +++++++++++------ arch/x86/platform/efi/efi_64.c | 16 ++++++---------- 2 files changed, 17 insertions(+), 16 deletions(-) --- a/arch/x86/mm/pageattr.c +++ b/arch/x86/mm/pageattr.c @@ -911,10 +911,15 @@ static void populate_pte(struct cpa_data pte = pte_offset_kernel(pmd, start); while (num_pages-- && start < end) { - set_pte(pte, pfn_pte(cpa->pfn, pgprot)); + + /* deal with the NX bit */ + if (!(pgprot_val(pgprot) & _PAGE_NX)) + cpa->pfn &= ~_PAGE_NX; + + set_pte(pte, pfn_pte(cpa->pfn >> PAGE_SHIFT, pgprot)); start += PAGE_SIZE; - cpa->pfn++; + cpa->pfn += PAGE_SIZE; pte++; } } @@ -970,11 +975,11 @@ static int populate_pmd(struct cpa_data pmd = pmd_offset(pud, start); - set_pmd(pmd, __pmd(cpa->pfn << PAGE_SHIFT | _PAGE_PSE | + set_pmd(pmd, __pmd(cpa->pfn | _PAGE_PSE | massage_pgprot(pmd_pgprot))); start += PMD_SIZE; - cpa->pfn += PMD_SIZE >> PAGE_SHIFT; + cpa->pfn += PMD_SIZE; cur_pages += PMD_SIZE >> PAGE_SHIFT; } @@ -1043,11 +1048,11 @@ static int populate_pud(struct cpa_data * Map everything starting from the Gb boundary, possibly with 1G pages */ while (end - start >= PUD_SIZE) { - set_pud(pud, __pud(cpa->pfn << PAGE_SHIFT | _PAGE_PSE | + set_pud(pud, __pud(cpa->pfn | _PAGE_PSE | massage_pgprot(pud_pgprot))); start += PUD_SIZE; - cpa->pfn += PUD_SIZE >> PAGE_SHIFT; + cpa->pfn += PUD_SIZE; cur_pages += PUD_SIZE >> PAGE_SHIFT; pud++; } --- a/arch/x86/platform/efi/efi_64.c +++ b/arch/x86/platform/efi/efi_64.c @@ -143,7 +143,7 @@ void efi_sync_low_kernel_mappings(void) int __init efi_setup_page_tables(unsigned long pa_memmap, unsigned num_pages) { - unsigned long pfn, text; + unsigned long text; struct page *page; unsigned npages; pgd_t *pgd; @@ -160,8 +160,7 @@ int __init efi_setup_page_tables(unsigne * and ident-map those pages containing the map before calling * phys_efi_set_virtual_address_map(). */ - pfn = pa_memmap >> PAGE_SHIFT; - if (kernel_map_pages_in_pgd(pgd, pfn, pa_memmap, num_pages, _PAGE_NX)) { + if (kernel_map_pages_in_pgd(pgd, pa_memmap, pa_memmap, num_pages, _PAGE_NX)) { pr_err("Error ident-mapping new memmap (0x%lx)!\n", pa_memmap); return 1; } @@ -186,9 +185,8 @@ int __init efi_setup_page_tables(unsigne npages = (_end - _text) >> PAGE_SHIFT; text = __pa(_text); - pfn = text >> PAGE_SHIFT; - if (kernel_map_pages_in_pgd(pgd, pfn, text, npages, 0)) { + if (kernel_map_pages_in_pgd(pgd, text >> PAGE_SHIFT, text, npages, 0)) { pr_err("Failed to map kernel text 1:1\n"); return 1; } @@ -206,14 +204,12 @@ void __init efi_cleanup_page_tables(unsi static void __init __map_region(efi_memory_desc_t *md, u64 va) { pgd_t *pgd = (pgd_t *)__va(real_mode_header->trampoline_pgd); - unsigned long flags = 0; - unsigned long pfn; + unsigned long pf = 0; if (!(md->attribute & EFI_MEMORY_WB)) - flags |= _PAGE_PCD; + pf |= _PAGE_PCD; - pfn = md->phys_addr >> PAGE_SHIFT; - if (kernel_map_pages_in_pgd(pgd, pfn, va, md->num_pages, flags)) + if (kernel_map_pages_in_pgd(pgd, md->phys_addr, va, md->num_pages, pf)) pr_warn("Error mapping PA 0x%llx -> VA 0x%llx!\n", md->phys_addr, va); }