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Message-Id: <20150519062536.FE60A9DA@viggo.jf.intel.com>
Date: Mon, 18 May 2015 23:25:36 -0700
From: Dave Hansen <dave@...1.net>
To: linux-kernel@...r.kernel.org
Cc: x86@...nel.org, tglx@...utronix.de, Dave Hansen <dave@...1.net>,
dave.hansen@...ux.intel.com
Subject: [PATCH 19/19] x86, mpx: allow mixed binaries again
From: Dave Hansen <dave.hansen@...ux.intel.com>
We explicitly disable allowing 32-bit binaries to enable
MPX on 64-bit kernels. Re-allow that.
Signed-off-by: Dave Hansen <dave.hansen@...ux.intel.com>
Reviewed-by: Thomas Gleixner <tglx@...utronix.de>
---
b/arch/x86/mm/mpx.c | 6 ------
1 file changed, 6 deletions(-)
diff -puN arch/x86/mm/mpx.c~x86-mpx-allow-mixed-binaries-again arch/x86/mm/mpx.c
--- a/arch/x86/mm/mpx.c~x86-mpx-allow-mixed-binaries-again 2015-05-18 17:49:05.171704066 -0700
+++ b/arch/x86/mm/mpx.c 2015-05-18 17:49:05.175704247 -0700
@@ -368,12 +368,6 @@ static __user void *mpx_get_bounds_dir(v
return MPX_INVALID_BOUNDS_DIR;
/*
- * 32-bit binaries on 64-bit kernels are currently
- * unsupported.
- */
- if (IS_ENABLED(CONFIG_X86_64) && test_thread_flag(TIF_IA32))
- return MPX_INVALID_BOUNDS_DIR;
- /*
* The bounds directory pointer is stored in a register
* only accessible if we first do an xsave.
*/
_
--
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