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* x86/paravirt: Remove paravirt ops pmd_update[_defer] and pte_update_deferJuergen Gross2015-11-257-47/+3
| | | | | | | | | | | | | | | | | | | | | | pte_update_defer can be removed as it is always set to the same function as pte_update. So any usage of pte_update_defer() can be replaced by pte_update(). pmd_update and pmd_update_defer are always set to paravirt_nop, so they can just be nuked. Signed-off-by: Juergen Gross <jgross@suse.com> Acked-by: Rusty Russell <rusty@rustcorp.com.au> Cc: jeremy@goop.org Cc: chrisw@sous-sol.org Cc: akataria@vmware.com Cc: virtualization@lists.linux-foundation.org Cc: xen-devel@lists.xen.org Cc: konrad.wilk@oracle.com Cc: david.vrabel@citrix.com Cc: boris.ostrovsky@oracle.com Link: http://lkml.kernel.org/r/1447771879-1806-1-git-send-email-jgross@suse.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86/paravirt: Remove unused pv_apic_ops structureJuergen Gross2015-11-196-44/+0
| | | | | | | | | | | | | | | | | | The only member of that structure is startup_ipi_hook which is always set to paravirt_nop. Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: David Vrabel <david.vrabel@citrix.com> Cc: jeremy@goop.org Cc: chrisw@sous-sol.org Cc: akataria@vmware.com Cc: rusty@rustcorp.com.au Cc: virtualization@lists.linux-foundation.org Cc: xen-devel@lists.xen.org Cc: konrad.wilk@oracle.com Cc: boris.ostrovsky@oracle.com Link: http://lkml.kernel.org/r/1447767872-16730-1-git-send-email-jgross@suse.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86/tsc: Remove unused tsc_pre_init() hookThomas Gleixner2015-11-193-5/+0
| | | | | | | No more users. Remove it. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Borislav Petkov <bp@suse.de>
* x86: Remove unused function cpu_has_ht_siblings()Juergen Gross2015-11-171-9/+0
| | | | | | | | It is used nowhere. Signed-off-by: Juergen Gross <jgross@suse.com> Link: http://lkml.kernel.org/r/1447761943-770-1-git-send-email-jgross@suse.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86/paravirt: Kill some unused patching functionsBorislav Petkov2015-11-072-14/+1
| | | | | | | | | | | | | | | | | | paravirt_patch_ignore() is completely unused and paravirt_patch_nop() doesn't do a whole lot. Remove them both. Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Juergen Gross <jgross@suse.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@kernel.org> Cc: Chris Wright <chrisw@sous-sol.org> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Cc: "Peter Zijlstra (Intel)" <peterz@infradead.org> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: virtualization@lists.linux-foundation.org Cc: xen-devel@lists.xenproject.org Link: http://lkml.kernel.org/r/1446542329-32037-1-git-send-email-bp@alien8.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* Merge branch 'x86-platform-for-linus' of ↵Linus Torvalds2015-11-034-27/+33
|\ | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 platform changes from Ingo Molnar: "Misc updates to the Intel MID and SGI UV platforms" * 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/intel-mid: Make intel_mid_ops static arch/x86/intel-mid: Use kmemdup rather than duplicating its implementation x86/platform/uv: Implement simple dump failover if kdump fails x86/platform/uv: Insert per_cpu accessor function on uv_hub_nmi
| * x86/intel-mid: Make intel_mid_ops staticAndy Shevchenko2015-10-111-1/+1
| | | | | | | | | | | | | | | | | | | | The following warning is issued on unfixed code. arch/x86/platform/intel-mid/intel-mid.c:64:22: warning: symbol 'intel_mid_ops' was not declared. Should it be static? Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: http://lkml.kernel.org/r/1444400741-98669-1-git-send-email-andriy.shevchenko@linux.intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * arch/x86/intel-mid: Use kmemdup rather than duplicating its implementationAndrzej Hajda2015-09-171-2/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The patch was generated using fixed coccinelle semantic patch scripts/coccinelle/api/memdup.cocci [1]. [1]: http://permalink.gmane.org/gmane.linux.kernel/2014320 Signed-off-by: Andrzej Hajda <a.hajda@samsung.com> Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Cc: Marek Szyprowski <m.szyprowski@samsung.com> Cc: Julia Lawall <Julia.Lawall@lip6.fr> Link: http://lkml.kernel.org/r/1438934377-4922-9-git-send-email-a.hajda@samsung.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * x86/platform/uv: Implement simple dump failover if kdump failsMike Travis2015-09-141-23/+30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The ability to trigger a kdump using the system NMI command was added by commit 12ba6c990fab ("x86/UV: Add kdump to UV NMI handler") Author: Mike Travis <travis@sgi.com> Date: Mon Sep 23 16:25:03 2013 -0500 This is useful because when kdump is working the information gathered is more informative than the original per CPU stack traces or "dump" option. However a number of things can go wrong with kdump and then the stack traces are more useful than nothing. The two most common reasons for kdump to not be available are: 1) if a problem occurs during boot before the kdump service is started, or 2) the kdump daemon failed to start. In either case the call to crash_kexec() returns unexpectedly. When this happens uv_nmi_kdump() also sets the uv_nmi_kexec_failed flag which causes the slave CPU's to also return to the NMI handler. Upon this unexpected return to the NMI handler, the NMI handler will revert to the "dump" action which uses show_regs() to obtain a process trace dump for all the CPU's. Other minor changes: The "dump" action now generates both the show_regs() stack trace and show instruction pointer information. Whereas the "ips" action only shows instruction pointers for non-idle CPU's. This is more like an abbreviated "ps" display. Change printk(KERN_DEFAULT...) --> pr_info() Signed-off-by: Mike Travis <travis@sgi.com> Signed-off-by: George Beshers <gbeshers@sgi.com> Cc: Alex Thorlton <athorlton@sgi.com> Cc: Dimitri Sivanich <sivanich@sgi.com> Cc: Hedi Berriche <hedi@sgi.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Russ Anderson <rja@sgi.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * x86/platform/uv: Insert per_cpu accessor function on uv_hub_nmiGeorge Beshers2015-09-131-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | UV: NMI: insert this_cpu_read accessor function on uv_hub_nmi. On SGI UV systems a 'power nmi' command from the CMC causes all processors to drop into uv_handle_nmi(). With the 4.0 kernel this results in BUG: unable to handle kernel paging request The bug is caused by the current code trying to use the PER_CPU variable uv_cpu_nmi.hub without an appropriate accessor function. That oversight occurred in commit e16321709c82 ("uv: Replace __get_cpu_var") Author: Christoph Lameter <cl@linux.com> Date: Sun Aug 17 12:30:41 2014 -0500 This patch inserts this_cpu_read() in the uv_hub_nmi macro restoring the intended functionality. Signed-off-by: George Beshers <gbeshers@sgi.com> Acked-by: Mike Travis <travis@sgi.com> Cc: Alex Thorlton <athorlton@sgi.com> Cc: Dimitri Sivanich <sivanich@sgi.com> Cc: Hedi Berriche <hedi@sgi.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Russ Anderson <rja@sgi.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
* | Merge branch 'x86-mm-for-linus' of ↵Linus Torvalds2015-11-0312-74/+219
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 mm changes from Ingo Molnar: "The main changes are: continued PAT work by Toshi Kani, plus a new boot time warning about insecure RWX kernel mappings, by Stephen Smalley. The new CONFIG_DEBUG_WX=y warning is marked default-y if CONFIG_DEBUG_RODATA=y is already eanbled, as a special exception, as these bugs are hard to notice and this check already found several live bugs" * 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/mm: Warn on W^X mappings x86/mm: Fix no-change case in try_preserve_large_page() x86/mm: Fix __split_large_page() to handle large PAT bit x86/mm: Fix try_preserve_large_page() to handle large PAT bit x86/mm: Fix gup_huge_p?d() to handle large PAT bit x86/mm: Fix slow_virt_to_phys() to handle large PAT bit x86/mm: Fix page table dump to show PAT bit x86/asm: Add pud_pgprot() and pmd_pgprot() x86/asm: Fix pud/pmd interfaces to handle large PAT bit x86/asm: Add pud/pmd mask interfaces to handle large PAT bit x86/asm: Move PUD_PAGE macros to page_types.h x86/vdso32: Define PGTABLE_LEVELS to 32bit VDSO
| * | x86/mm: Warn on W^X mappingsStephen Smalley2015-10-066-3/+88
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Warn on any residual W+X mappings after setting NX if DEBUG_WX is enabled. Introduce a separate X86_PTDUMP_CORE config that enables the code for dumping the page tables without enabling the debugfs interface, so that DEBUG_WX can be enabled without exposing the debugfs interface. Switch EFI_PGT_DUMP to using X86_PTDUMP_CORE so that it also does not require enabling the debugfs interface. On success it prints this to the kernel log: x86/mm: Checked W+X mappings: passed, no W+X pages found. On failure it prints a warning and a count of the failed pages: ------------[ cut here ]------------ WARNING: CPU: 1 PID: 1 at arch/x86/mm/dump_pagetables.c:226 note_page+0x610/0x7b0() x86/mm: Found insecure W+X mapping at address ffffffff81755000/__stop___ex_table+0xfa8/0xabfa8 [...] Call Trace: [<ffffffff81380a5f>] dump_stack+0x44/0x55 [<ffffffff8109d3f2>] warn_slowpath_common+0x82/0xc0 [<ffffffff8109d48c>] warn_slowpath_fmt+0x5c/0x80 [<ffffffff8106cfc9>] ? note_page+0x5c9/0x7b0 [<ffffffff8106d010>] note_page+0x610/0x7b0 [<ffffffff8106d409>] ptdump_walk_pgd_level_core+0x259/0x3c0 [<ffffffff8106d5a7>] ptdump_walk_pgd_level_checkwx+0x17/0x20 [<ffffffff81063905>] mark_rodata_ro+0xf5/0x100 [<ffffffff817415a0>] ? rest_init+0x80/0x80 [<ffffffff817415bd>] kernel_init+0x1d/0xe0 [<ffffffff8174cd1f>] ret_from_fork+0x3f/0x70 [<ffffffff817415a0>] ? rest_init+0x80/0x80 ---[ end trace a1f23a1e42a2ac76 ]--- x86/mm: Checked W+X mappings: FAILED, 171 W+X pages found. Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov> Acked-by: Kees Cook <keescook@chromium.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Link: http://lkml.kernel.org/r/1444064120-11450-1-git-send-email-sds@tycho.nsa.gov [ Improved the Kconfig help text and made the new option default-y if CONFIG_DEBUG_RODATA=y, because it already found buggy mappings, so we really want people to have this on by default. ] Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * | Merge tag 'v4.3-rc3' into x86/mm, to pick up fixes before applying new changesIngo Molnar2015-10-0675-370/+504
| |\ \ | | | | | | | | | | | | Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * | | x86/mm: Fix no-change case in try_preserve_large_page()Toshi Kani2015-09-221-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | try_preserve_large_page() checks if new_prot is the same as old_prot. If so, it simply sets do_split to 0, and returns with no-operation. However, old_prot is set as a 4KB pgprot value while new_prot is a large page pgprot value. Now that old_prot is initially set from p?d_pgprot() as a large page pgprot value, fix it by not overwriting old_prot with a 4KB pgprot value. Signed-off-by: Toshi Kani <toshi.kani@hpe.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Juergen Gross <jgross@suse.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Konrad Wilk <konrad.wilk@oracle.com> Cc: Robert Elliot <elliott@hpe.com> Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/1442514264-12475-12-git-send-email-toshi.kani@hpe.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * | | x86/mm: Fix __split_large_page() to handle large PAT bitToshi Kani2015-09-221-12/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | __split_large_page() is called from __change_page_attr() to change the mapping attribute by splitting a given large page into smaller pages. This function uses pte_pfn() and pte_pgprot() for PUD/PMD, which do not handle the large PAT bit properly. Fix __split_large_page() by using the corresponding pud/pmd pfn/ pgprot interfaces. Also remove '#ifdef CONFIG_X86_64', which is not necessary. Signed-off-by: Toshi Kani <toshi.kani@hpe.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Juergen Gross <jgross@suse.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Konrad Wilk <konrad.wilk@oracle.com> Cc: Robert Elliot <elliott@hpe.com> Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/1442514264-12475-11-git-send-email-toshi.kani@hpe.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * | | x86/mm: Fix try_preserve_large_page() to handle large PAT bitToshi Kani2015-09-221-10/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | try_preserve_large_page() is called from __change_page_attr() to change the mapping attribute of a given large page. This function uses pte_pfn() and pte_pgprot() for PUD/PMD, which do not handle the large PAT bit properly. Fix try_preserve_large_page() by using the corresponding pud/pmd prot/pfn interfaces. Also remove '#ifdef CONFIG_X86_64', which is not necessary. Signed-off-by: Toshi Kani <toshi.kani@hpe.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Juergen Gross <jgross@suse.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Konrad Wilk <konrad.wilk@oracle.com> Cc: Robert Elliot <elliott@hpe.com> Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/1442514264-12475-10-git-send-email-toshi.kani@hpe.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * | | x86/mm: Fix gup_huge_p?d() to handle large PAT bitToshi Kani2015-09-221-10/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | gup_huge_pud() and gup_huge_pmd() cast *pud and *pmd to *pte, and use pte_xxx() interfaces to obtain the flags and PFN. However, the pte_xxx() interface does not handle the large PAT bit properly for PUD/PMD. Fix gup_huge_pud() and gup_huge_pmd() to use pud_xxx() and pmd_xxx() interfaces according to their type. Signed-off-by: Toshi Kani <toshi.kani@hpe.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Juergen Gross <jgross@suse.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Konrad Wilk <konrad.wilk@oracle.com> Cc: Robert Elliot <elliott@hpe.com> Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/1442514264-12475-9-git-send-email-toshi.kani@hpe.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * | | x86/mm: Fix slow_virt_to_phys() to handle large PAT bitToshi Kani2015-09-221-7/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | slow_virt_to_phys() calls lookup_address() to obtain *pte and its level. It then calls pte_pfn() to obtain a physical address for any level. However, this physical address is not correct when the large PAT bit is set because pte_pfn() does not mask the large PAT bit properly for PUD/PMD. Fix slow_virt_to_phys() to use pud_pfn() and pmd_pfn() for 1GB and 2MB mapping levels. Signed-off-by: Toshi Kani <toshi.kani@hpe.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Juergen Gross <jgross@suse.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Konrad Wilk <konrad.wilk@oracle.com> Cc: Robert Elliot <elliott@hpe.com> Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/1442514264-12475-8-git-send-email-toshi.kani@hpe.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * | | x86/mm: Fix page table dump to show PAT bitToshi Kani2015-09-221-18/+21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | /sys/kernel/debug/kernel_page_tables does not show the PAT bit for PUD/PMD mappings. This is because walk_pud_level(), walk_pmd_level() and note_page() mask the flags with PTE_FLAGS_MASK, which does not cover their PAT bit, _PAGE_PAT_LARGE. Fix it by replacing the use of PTE_FLAGS_MASK with p?d_flags(), which masks the flags properly. Also change to show the PAT bit as "PAT" to be consistent with other bits. Reported-by: Robert Elliott <elliott@hpe.com> Signed-off-by: Toshi Kani <toshi.kani@hpe.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Juergen Gross <jgross@suse.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Konrad Wilk <konrad.wilk@oracle.com> Cc: Robert Elliot <elliott@hpe.com> Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/1442514264-12475-7-git-send-email-toshi.kani@hpe.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * | | x86/asm: Add pud_pgprot() and pmd_pgprot()Toshi Kani2015-09-221-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | pte_pgprot() returns a pgprot_t value by calling pte_flags(). Now that pud_flags() and pmd_flags() work specifically for the pud/pmd levels, define pud_pgprot() and pmd_pgprot() for PUD/PMD. Also update pte_pgprot() to remove the unnecessary mask with PTE_FLAGS_MASK as pte_flags() takes care of it. Signed-off-by: Toshi Kani <toshi.kani@hpe.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Juergen Gross <jgross@suse.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Konrad Wilk <konrad.wilk@oracle.com> Cc: Robert Elliot <elliott@hpe.com> Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/1442514264-12475-6-git-send-email-toshi.kani@hpe.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * | | x86/asm: Fix pud/pmd interfaces to handle large PAT bitToshi Kani2015-09-222-8/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now that we have pud/pmd mask interfaces, which handle pfn & flags mask properly for the large PAT bit. Fix pud/pmd pfn & flags interfaces by replacing PTE_PFN_MASK and PTE_FLAGS_MASK with the pud/pmd mask interfaces. Suggested-by: Juergen Gross <jgross@suse.com> Signed-off-by: Toshi Kani <toshi.kani@hpe.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Juergen Gross <jgross@suse.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Konrad Wilk <konrad.wilk@oracle.com> Cc: Robert Elliot <elliott@hpe.com> Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/1442514264-12475-5-git-send-email-toshi.kani@hpe.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * | | x86/asm: Add pud/pmd mask interfaces to handle large PAT bitToshi Kani2015-09-221-2/+34
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The PAT bit gets relocated to bit 12 when PUD and PMD mappings are used. This bit 12, however, is not covered by PTE_FLAGS_MASK, which is used for masking pfn and flags for all levels. Add pud/pmd mask interfaces to handle pfn and flags properly by using P?D_PAGE_MASK when PUD/PMD mappings are used, i.e. PSE bit is set. Suggested-by: Juergen Gross <jgross@suse.com> Signed-off-by: Toshi Kani <toshi.kani@hpe.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Juergen Gross <jgross@suse.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Konrad Wilk <konrad.wilk@oracle.com> Cc: Robert Elliot <elliott@hpe.com> Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/1442514264-12475-4-git-send-email-toshi.kani@hpe.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * | | x86/asm: Move PUD_PAGE macros to page_types.hToshi Kani2015-09-222-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | PUD_SHIFT is defined according to a given kernel configuration, which allows it be commonly used by any x86 kernels. However, PUD_PAGE_SIZE and PUD_PAGE_MASK, which are set from PUD_SHIFT, are defined in page_64_types.h, which can be used by 64-bit kernel only. Move PUD_PAGE_SIZE and PUD_PAGE_MASK to page_types.h so that they can be used by any x86 kernels as well. Signed-off-by: Toshi Kani <toshi.kani@hpe.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Juergen Gross <jgross@suse.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Konrad Wilk <konrad.wilk@oracle.com> Cc: Robert Elliot <elliott@hpe.com> Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/1442514264-12475-3-git-send-email-toshi.kani@hpe.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * | | x86/vdso32: Define PGTABLE_LEVELS to 32bit VDSOToshi Kani2015-09-221-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In case of CONFIG_X86_64, vdso32/vclock_gettime.c fakes a 32-bit non-PAE kernel configuration by re-defining it to CONFIG_X86_32. However, it does not re-define CONFIG_PGTABLE_LEVELS leaving it as 4 levels. This mismatch leads <asm/pgtable_type.h> to NOT include <asm-generic/ pgtable-nopud.h> and <asm-generic/pgtable-nopmd.h>, which will cause compile errors when a later patch enhances <asm/pgtable_type.h> to use PUD_SHIFT and PMD_SHIFT. These -nopud & -nopmd headers define these SHIFTs for the 32-bit non-PAE kernel. Fix it by re-defining CONFIG_PGTABLE_LEVELS to 2 levels. Signed-off-by: Toshi Kani <toshi.kani@hpe.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Juergen Gross <jgross@suse.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Konrad Wilk <konrad.wilk@oracle.com> Cc: Robert Elliot <elliott@hpe.com> Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/1442514264-12475-2-git-send-email-toshi.kani@hpe.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* | | | Merge branch 'x86-headers-for-linus' of ↵Linus Torvalds2015-11-0313-339/+338
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 sigcontext header cleanups from Ingo Molnar: "This series reorganizes and cleans up various aspects of the main sigcontext UAPI headers, such as unifying the data structures and updating/adding lots of comments to explain all the ABI details and quirks. The headers can now also be built in user-space standalone" * 'x86-headers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/headers: Clean up too long lines x86/headers: Remove <asm/sigcontext.h> references on the kernel side x86/headers: Remove direct sigcontext32.h uses x86/headers: Convert sigcontext_ia32 uses to sigcontext_32 x86/headers: Unify 'struct sigcontext_ia32' and 'struct sigcontext_32' x86/headers: Make sigcontext pointers bit independent x86/headers: Move the 'struct sigcontext' definitions into the UAPI header x86/headers: Clean up the kernel's struct sigcontext types to be ABI-clean x86/headers: Convert uses of _fpstate_ia32 to _fpstate_32 x86/headers: Unify 'struct _fpstate_ia32' and i386 struct _fpstate x86/headers: Unify register type definitions between 32-bit compat and i386 x86/headers: Use ABI types consistently in sigcontext*.h x86/headers: Separate out legacy user-space structure definitions x86/headers: Clean up and better document uapi/asm/sigcontext.h x86/headers: Clean up uapi/asm/sigcontext32.h x86/headers: Fix (old) header file dependency bug in uapi/asm/sigcontext32.h
| * | | | x86/headers: Clean up too long linesPeter Zijlstra2015-09-141-26/+31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: bp@alien8.de Cc: brgerst@gmail.com Cc: dvlasenk@redhat.com Cc: luto@amacapital.net Cc: mikko.rapeli@iki.fi Cc: oleg@redhat.com Link: http://lkml.kernel.org/r/20150909071244.GM3644@twins.programming.kicks-ass.net Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * | | | x86/headers: Remove <asm/sigcontext.h> references on the kernel sideIngo Molnar2015-09-088-7/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now that all type definitions are in the UAPI header, include it directly, instead of through <asm/sigcontext.h>. [ We still keep asm/sigcontext.h, so that uapi/asm/sigcontext32.h can include <asm/sigcontext.h>. ] Acked-by: Mikko Rapeli <mikko.rapeli@iki.fi> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Link: http://lkml.kernel.org/r/1441438363-9999-16-git-send-email-mingo@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * | | | x86/headers: Remove direct sigcontext32.h usesIngo Molnar2015-09-084-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now that all sigcontext types are defined in asm/sigcontext.h, remove the various sigcontext32.h uses in the kernel. We still keep the header itself, which includes sigcontext.h, in case user-space relies on it. Acked-by: Mikko Rapeli <mikko.rapeli@iki.fi> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Link: http://lkml.kernel.org/r/1441438363-9999-15-git-send-email-mingo@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * | | | x86/headers: Convert sigcontext_ia32 uses to sigcontext_32Ingo Molnar2015-09-085-16/+22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use the new name in kernel code, and move the old name to the user-space-only legacy section of the UAPI header. Acked-by: Mikko Rapeli <mikko.rapeli@iki.fi> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Link: http://lkml.kernel.org/r/1441438363-9999-14-git-send-email-mingo@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * | | | x86/headers: Unify 'struct sigcontext_ia32' and 'struct sigcontext_32'Ingo Molnar2015-09-083-27/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The two structures are identical - merge them and keep the legacy name as a define. Acked-by: Mikko Rapeli <mikko.rapeli@iki.fi> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Link: http://lkml.kernel.org/r/1441438363-9999-13-git-send-email-mingo@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * | | | x86/headers: Make sigcontext pointers bit independentIngo Molnar2015-09-082-3/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Before we can eliminate the duplication between 'struct sigcontext_32' and 'struct sigcontext_ia32', make the 'fpstate' pointer field in 'struct sigcontext_32' bit independent. Acked-by: Mikko Rapeli <mikko.rapeli@iki.fi> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Link: http://lkml.kernel.org/r/1441438363-9999-12-git-send-email-mingo@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * | | | x86/headers: Move the 'struct sigcontext' definitions into the UAPI headerIngo Molnar2015-09-082-73/+83
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Our goal is to eliminate the duplicate struct sigcontext_ia32 definition, so move the kernel's primary sigcontext type into the UAPI header, defining these two variants: struct sigcontext_32 struct sigcontext_64 ... and map them to 'struct sigcontext'. Acked-by: Mikko Rapeli <mikko.rapeli@iki.fi> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Link: http://lkml.kernel.org/r/1441438363-9999-11-git-send-email-mingo@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * | | | x86/headers: Clean up the kernel's struct sigcontext types to be ABI-cleanIngo Molnar2015-09-081-52/+52
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use the __u16/32/64 types we standardized on in ABI definitions and which other sigcontext related types are already using. This will help unify struct sigcontext types between native 32-bit, compat and 64-bit kernels. Acked-by: Mikko Rapeli <mikko.rapeli@iki.fi> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Link: http://lkml.kernel.org/r/1441438363-9999-10-git-send-email-mingo@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * | | | x86/headers: Convert uses of _fpstate_ia32 to _fpstate_32Ingo Molnar2015-09-085-7/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Remove uses of _fpstate_ia32 from the kernel, and move the legacy _fpstate_ia32 definition to the user-space only portion of the header. Acked-by: Mikko Rapeli <mikko.rapeli@iki.fi> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Link: http://lkml.kernel.org/r/1441438363-9999-9-git-send-email-mingo@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * | | | x86/headers: Unify 'struct _fpstate_ia32' and i386 struct _fpstateIngo Molnar2015-09-083-39/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 'struct _fpstate_ia32' and 'struct _fpstate' on i386 are identical in all fields, except 'padding1' being named 'padding'. We unify the two structures and add a union that is both named 'padding1' and 'padding', in the (unlikely) case there's user-space code that relies on the padding field name. We rename the two main types to be: struct _fpstate_32 struct _fpstate_64 for the 32-bit and 64-bit frame, and map them to the main and compat structure names (_fpstate) depending on whether we are on 32-bit or on 64-bit kernels. We also keep the old _fpstate_ia32 name as a legacy name. Acked-by: Mikko Rapeli <mikko.rapeli@iki.fi> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Link: http://lkml.kernel.org/r/1441438363-9999-8-git-send-email-mingo@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * | | | x86/headers: Unify register type definitions between 32-bit compat and i386Ingo Molnar2015-09-082-23/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The following sigcontext related types were duplicated across native 32-bit and compat 32-bit headers: struct _fpreg; struct _fpxreg; struct _xmmreg; X86_FXSR_MAGIC Unify them. Acked-by: Mikko Rapeli <mikko.rapeli@iki.fi> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Link: http://lkml.kernel.org/r/1441438363-9999-7-git-send-email-mingo@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * | | | x86/headers: Use ABI types consistently in sigcontext*.hIngo Molnar2015-09-082-70/+70
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use the __u16/32/64 types we standardized on in ABI definitions - and which most of this header was already using. This will allow us to more obviously unify the compat header into the main header. No change in functionality. Acked-by: Mikko Rapeli <mikko.rapeli@iki.fi> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Link: http://lkml.kernel.org/r/1441438363-9999-6-git-send-email-mingo@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * | | | x86/headers: Separate out legacy user-space structure definitionsIngo Molnar2015-09-081-60/+59
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Better separate the user-space struct sigcontext definitions from the kernel definitions, so that we can unify the kernel definitions with sigcontext32.h. Acked-by: Mikko Rapeli <mikko.rapeli@iki.fi> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Link: http://lkml.kernel.org/r/1441438363-9999-5-git-send-email-mingo@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * | | | x86/headers: Clean up and better document uapi/asm/sigcontext.hIngo Molnar2015-09-081-148/+182
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Clean up sigcontext.h: - the explanations were full of typos and were hard to read in general - use consistent and readable vertical spacing - fix, harmonize and extend comments No field name has been changed, user-space might be relying on them. Acked-by: Mikko Rapeli <mikko.rapeli@iki.fi> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Link: http://lkml.kernel.org/r/1441438363-9999-4-git-send-email-mingo@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * | | | x86/headers: Clean up uapi/asm/sigcontext32.hIngo Molnar2015-09-081-52/+58
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Clean up sigcontext32.h a bit: - use consistent and readable vertical spacing - fix, harmonize and extend comments No field name has been changed, user-space might be relying on them. Acked-by: Mikko Rapeli <mikko.rapeli@iki.fi> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Link: http://lkml.kernel.org/r/1441438363-9999-3-git-send-email-mingo@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * | | | x86/headers: Fix (old) header file dependency bug in uapi/asm/sigcontext32.hIngo Molnar2015-09-081-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Mikko Rapeli reported that the following standalone user-space header does not compile: #include <asm/sigcontext32.h> Due to undefined 'struct __fpx_sw_bytes' which is defined in asm/sigcontext.h. The following header order works: #include <asm/sigcontext.h> #include <asm/sigcontext32.h> and that's probably how everyone's been using these headers for the past decade or so, but it's a legit header file dependency bug, so include asm/sigcontext.h in sigcontext32.h to allow it to be built standlone. Reported-by: Mikko Rapeli <mikko.rapeli@iki.fi> Acked-by: Mikko Rapeli <mikko.rapeli@iki.fi> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Link: http://lkml.kernel.org/r/1441438363-9999-2-git-send-email-mingo@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
* | | | | Merge branch 'x86-fpu-for-linus' of ↵Linus Torvalds2015-11-0329-241/+810
|\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 fpu changes from Ingo Molnar: "There are two main areas of changes: - Rework of the extended FPU state code to robustify the kernel's usage of cpuid provided xstate sizes - and related changes (Dave Hansen)" - math emulation enhancements: new modern FPU instructions support, with testcases, plus cleanups (Denys Vlasnko)" * 'x86-fpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (23 commits) x86/fpu: Fixup uninitialized feature_name warning x86/fpu/math-emu: Add support for FISTTP instructions x86/fpu/math-emu, selftests: Add test for FISTTP instructions x86/fpu/math-emu: Add support for FCMOVcc insns x86/fpu/math-emu: Add support for F[U]COMI[P] insns x86/fpu/math-emu: Remove define layer for undocumented opcodes x86/fpu/math-emu, selftests: Add tests for FCMOV and FCOMI insns x86/fpu/math-emu: Remove !NO_UNDOC_CODE x86/fpu: Check CPU-provided sizes against struct declarations x86/fpu: Check to ensure increasing-offset xstate offsets x86/fpu: Correct and check XSAVE xstate size calculations x86/fpu: Add C structures for AVX-512 state components x86/fpu: Rework YMM definition x86/fpu/mpx: Rework MPX 'xstate' types x86/fpu: Add xfeature_enabled() helper instead of test_bit() x86/fpu: Remove 'xfeature_nr' x86/fpu: Rework XSTATE_* macros to remove magic '2' x86/fpu: Rename XFEATURES_NR_MAX x86/fpu: Rename XSAVE macros x86/fpu: Remove partial LWP support definitions ...
| * | | | | x86/fpu: Fixup uninitialized feature_name warningBorislav Petkov2015-09-241-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Hand in &feature_name to cpu_has_xfeatures() as it is supposed to. Fixes an uninitialized warning. Signed-off-by: Borislav Petkov <bp@suse.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: brgerst@gmail.com Cc: dvlasenk@redhat.com Cc: fenghua.yu@intel.com Cc: luto@amacapital.net Cc: tim.c.chen@linux.intel.com Fixes: d91cab78133d ("x86/fpu: Rename XSAVE macros") Link: http://lkml.kernel.org/r/20150923104901.GA3538@pd.tnic Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * | | | | x86/fpu/math-emu: Add support for FISTTP instructionsDenys Vlasenko2015-09-201-12/+51
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | These FPU instructions were added in SSE3-enabled CPUs. Run-tested by booting with "no387 nofxsr" and running test program: [RUN] Testing fisttp instructions [OK] fisttp Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Kees Cook <keescook@chromium.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Shuah Khan <shuahkh@osg.samsung.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Link: http://lkml.kernel.org/r/1442600614-28428-1-git-send-email-dvlasenk@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * | | | | x86/fpu/math-emu: Add support for FCMOVcc insnsDenys Vlasenko2015-09-203-9/+87
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Run-tested by booting with "no387 nofxsr" and running test program: [RUN] Testing fcmovCC instructions [OK] fcmovCC Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Kees Cook <keescook@chromium.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Link: http://lkml.kernel.org/r/1442588010-20055-3-git-send-email-dvlasenk@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * | | | | x86/fpu/math-emu: Add support for F[U]COMI[P] insnsDenys Vlasenko2015-09-203-12/+147
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Run-tested by booting with "no387 nofxsr" and running test program: [RUN] Testing f[u]comi[p] instructions [OK] f[u]comi[p] Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Kees Cook <keescook@chromium.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Link: http://lkml.kernel.org/r/1442588010-20055-2-git-send-email-dvlasenk@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * | | | | x86/fpu/math-emu: Remove define layer for undocumented opcodesDenys Vlasenko2015-09-201-22/+21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | No code changes. Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Kees Cook <keescook@chromium.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Link: http://lkml.kernel.org/r/1442588010-20055-1-git-send-email-dvlasenk@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * | | | | x86/fpu/math-emu: Remove !NO_UNDOC_CODEDenys Vlasenko2015-09-151-36/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We always want to support all FPU opcodes, including undocumented ones. That define was fully justified ~20 years ago but not today. Let's not complicate the code with it. Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Kees Cook <keescook@chromium.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1440699330-1305-1-git-send-email-dvlasenk@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * | | | | x86/fpu: Check CPU-provided sizes against struct declarationsDave Hansen2015-09-141-0/+45
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We now have C structures defined for each of the XSAVE state components that we support. This patch adds checks during our verification pass to ensure that the CPU-provided data enumerated in CPUID leaves matches our C structures. If not, we warn and dump all the XSAVE CPUID leaves. Note: this *actually* found an inconsistency with the MPX 'bndcsr' state. The hardware pads it out differently from our C structures. This patch caught it and warned. Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tim Chen <tim.c.chen@linux.intel.com> Cc: dave@sr71.net Cc: linux-kernel@vger.kernel.org Link: http://lkml.kernel.org/r/20150902233131.A8DB36DA@viggo.jf.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * | | | | x86/fpu: Check to ensure increasing-offset xstate offsetsDave Hansen2015-09-141-11/+24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The xstate CPUID leaves enumerate where each state component is inside the XSAVE buffer, along with the size of the entire buffer. Our new XSAVE sanity-checking code extrapolates an expected _total_ buffer size by looking at the last component that it encounters. That method requires that the highest-numbered component also be the one with the highest offset. This is a pretty safe assumption, but let's add some code to ensure it stays true. To make this check work correctly, we also need to ensure we only consider the offsets from enabled features because the offset register (ebx) will return 0 on unsupported features. This also means that we will preserve the -1's that we initialized xstate_offsets/sizes[] with. That will help find bugs. Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tim Chen <tim.c.chen@linux.intel.com> Cc: dave@sr71.net Cc: linux-kernel@vger.kernel.org Link: http://lkml.kernel.org/r/20150902233130.0843AB15@viggo.jf.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
generated by cgit v1.2.3 (git 2.25.1) at 2025-02-05 12:42:06 +0000