From: "tip-bot2 for Borislav Petkov" <tip-bot2@linutronix.de>
To: linux-tip-commits@vger.kernel.org
Cc: Borislav Petkov <bp@suse.de>, Kees Cook <keescook@chromium.org>,
x86@kernel.org, linux-kernel@vger.kernel.org
Subject: [tip: x86/cpu] x86/cpu: Remove "nosep"
Date: Mon, 04 Apr 2022 18:22:20 -0000 [thread overview]
Message-ID: <164909654054.389.299918398253472131.tip-bot2@tip-bot2> (raw)
In-Reply-To: <20220127115626.14179-3-bp@alien8.de>
The following commit has been merged into the x86/cpu branch of tip:
Commit-ID: c949110ef4e31cb5d3387bd8273fd5de66b5227b
Gitweb: https://git.kernel.org/tip/c949110ef4e31cb5d3387bd8273fd5de66b5227b
Author: Borislav Petkov <bp@suse.de>
AuthorDate: Thu, 27 Jan 2022 12:56:22 +01:00
Committer: Borislav Petkov <bp@suse.de>
CommitterDate: Mon, 04 Apr 2022 10:16:55 +02:00
x86/cpu: Remove "nosep"
That chicken bit was added by
4f88651125e2 ("[PATCH] i386: allow disabling X86_FEATURE_SEP at boot")
but measuring int80 vsyscall performance on 32-bit doesn't matter
anymore.
If still needed, one can boot with
clearcpuid=sep
to disable that feature for testing.
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20220127115626.14179-3-bp@alien8.de
---
Documentation/admin-guide/kernel-parameters.txt | 2 --
arch/x86/kernel/cpu/common.c | 7 -------
2 files changed, 9 deletions(-)
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 0ea1786..a9f3d31 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -3665,8 +3665,6 @@
nosbagart [IA-64]
- nosep [BUGS=X86-32] Disables x86 SYSENTER/SYSEXIT support.
-
nosgx [X86-64,SGX] Disables Intel SGX kernel support.
nosmp [SMP] Tells an SMP kernel to act as a UP kernel,
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 69c7ea8..c71d107 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -298,13 +298,6 @@ static int __init cachesize_setup(char *str)
}
__setup("cachesize=", cachesize_setup);
-static int __init x86_sep_setup(char *s)
-{
- setup_clear_cpu_cap(X86_FEATURE_SEP);
- return 1;
-}
-__setup("nosep", x86_sep_setup);
-
/* Standard macro to see if a specific flag is changeable */
static inline int flag_is_changeable_p(u32 flag)
{
next prev parent reply other threads:[~2022-04-04 21:23 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-27 11:56 [PATCH v2 0/6] x86/cpu: Do some janitorial work Borislav Petkov
2022-01-27 11:56 ` [PATCH v2 1/6] x86/cpu: Allow feature bit names from /proc/cpuinfo in clearcpuid= Borislav Petkov
2022-02-07 22:04 ` Kees Cook
2022-02-08 11:54 ` Borislav Petkov
2022-04-04 18:22 ` [tip: x86/cpu] " tip-bot2 for Borislav Petkov
2022-01-27 11:56 ` [PATCH v2 2/6] x86/cpu: Remove "nosep" Borislav Petkov
2022-02-07 21:58 ` Kees Cook
2022-04-04 18:22 ` tip-bot2 for Borislav Petkov [this message]
2022-01-27 11:56 ` [PATCH v2 3/6] x86/cpu: Remove CONFIG_X86_SMAP and "nosmap" Borislav Petkov
2022-02-07 22:07 ` Kees Cook
2022-02-08 15:06 ` Borislav Petkov
2022-02-08 21:01 ` Borislav Petkov
2022-02-09 2:56 ` Kees Cook
2022-02-09 11:53 ` Borislav Petkov
2022-04-04 18:22 ` [tip: x86/cpu] " tip-bot2 for Borislav Petkov
2022-01-27 11:56 ` [PATCH v2 4/6] x86/cpu: Remove "nosmep" Borislav Petkov
2022-02-07 22:07 ` Kees Cook
2022-04-04 18:22 ` [tip: x86/cpu] " tip-bot2 for Borislav Petkov
2022-01-27 11:56 ` [PATCH v2 5/6] x86/cpu: Remove "noexec" Borislav Petkov
2022-02-07 22:25 ` Kees Cook
2022-02-08 17:40 ` Sean Christopherson
2022-02-08 19:56 ` Borislav Petkov
2022-04-04 18:22 ` [tip: x86/cpu] " tip-bot2 for Borislav Petkov
2022-01-27 11:56 ` [PATCH v2 6/6] x86/cpu: Remove "noclflush" Borislav Petkov
2022-02-07 22:08 ` Kees Cook
2022-04-04 18:22 ` [tip: x86/cpu] " tip-bot2 for Borislav Petkov
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