diff options
Diffstat (limited to 'common/recipes-kernel/linux/linux-yocto-4.9.21/0002-x86-mm-Add-the-nopcid-boot-option-to-turn-off-PCID.patch')
| -rw-r--r-- | common/recipes-kernel/linux/linux-yocto-4.9.21/0002-x86-mm-Add-the-nopcid-boot-option-to-turn-off-PCID.patch | 77 |
1 files changed, 0 insertions, 77 deletions
diff --git a/common/recipes-kernel/linux/linux-yocto-4.9.21/0002-x86-mm-Add-the-nopcid-boot-option-to-turn-off-PCID.patch b/common/recipes-kernel/linux/linux-yocto-4.9.21/0002-x86-mm-Add-the-nopcid-boot-option-to-turn-off-PCID.patch deleted file mode 100644 index 545ec3ea..00000000 --- a/common/recipes-kernel/linux/linux-yocto-4.9.21/0002-x86-mm-Add-the-nopcid-boot-option-to-turn-off-PCID.patch +++ /dev/null @@ -1,77 +0,0 @@ -From ec0d53f307bb0f6155e68ff262e9eb773dc99975 Mon Sep 17 00:00:00 2001 -From: Andy Lutomirski <luto@kernel.org> -Date: Thu, 29 Jun 2017 08:53:20 -0700 -Subject: [PATCH 002/103] x86/mm: Add the 'nopcid' boot option to turn off PCID - -commit 0790c9aad84901ca1bdc14746175549c8b5da215 upstream. - -The parameter is only present on x86_64 systems to save a few bytes, -as PCID is always disabled on x86_32. - -Signed-off-by: Andy Lutomirski <luto@kernel.org> -Reviewed-by: Nadav Amit <nadav.amit@gmail.com> -Reviewed-by: Borislav Petkov <bp@suse.de> -Reviewed-by: Thomas Gleixner <tglx@linutronix.de> -Cc: Andrew Morton <akpm@linux-foundation.org> -Cc: Arjan van de Ven <arjan@linux.intel.com> -Cc: Borislav Petkov <bp@alien8.de> -Cc: Dave Hansen <dave.hansen@intel.com> -Cc: Linus Torvalds <torvalds@linux-foundation.org> -Cc: Mel Gorman <mgorman@suse.de> -Cc: Peter Zijlstra <peterz@infradead.org> -Cc: Rik van Riel <riel@redhat.com> -Cc: linux-mm@kvack.org -Link: http://lkml.kernel.org/r/8bbb2e65bcd249a5f18bfb8128b4689f08ac2b60.1498751203.git.luto@kernel.org -Signed-off-by: Ingo Molnar <mingo@kernel.org> -Cc: Hugh Dickins <hughd@google.com> -Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> ---- - Documentation/kernel-parameters.txt | 2 ++ - arch/x86/kernel/cpu/common.c | 18 ++++++++++++++++++ - 2 files changed, 20 insertions(+) - -diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt -index 65b05ba..a303387 100644 ---- a/Documentation/kernel-parameters.txt -+++ b/Documentation/kernel-parameters.txt -@@ -2785,6 +2785,8 @@ bytes respectively. Such letter suffixes can also be entirely omitted. - nopat [X86] Disable PAT (page attribute table extension of - pagetables) support. - -+ nopcid [X86-64] Disable the PCID cpu feature. -+ - norandmaps Don't use address space randomization. Equivalent to - echo 0 > /proc/sys/kernel/randomize_va_space - -diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c -index 4eece91..81c8a53 100644 ---- a/arch/x86/kernel/cpu/common.c -+++ b/arch/x86/kernel/cpu/common.c -@@ -163,6 +163,24 @@ static int __init x86_mpx_setup(char *s) - } - __setup("nompx", x86_mpx_setup); - -+#ifdef CONFIG_X86_64 -+static int __init x86_pcid_setup(char *s) -+{ -+ /* require an exact match without trailing characters */ -+ if (strlen(s)) -+ return 0; -+ -+ /* do not emit a message if the feature is not present */ -+ if (!boot_cpu_has(X86_FEATURE_PCID)) -+ return 1; -+ -+ setup_clear_cpu_cap(X86_FEATURE_PCID); -+ pr_info("nopcid: PCID feature disabled\n"); -+ return 1; -+} -+__setup("nopcid", x86_pcid_setup); -+#endif -+ - static int __init x86_noinvpcid_setup(char *s) - { - /* noinvpcid doesn't accept parameters */ --- -2.7.4 - |