From: Dave Hansen <dave@sr71.net>
To: linux-kernel@vger.kernel.org
Cc: x86@kernel.org, tglx@linutronix.de, Dave Hansen <dave@sr71.net>,
dave.hansen@linux.intel.com
Subject: [PATCH 16/16] x86, mpx: allow mixed binaries again
Date: Tue, 31 Mar 2015 17:46:44 -0700 [thread overview]
Message-ID: <20150401004644.7024D02F@viggo.jf.intel.com> (raw)
In-Reply-To: <20150401004623.894DF37A@viggo.jf.intel.com>
From: Dave Hansen <dave.hansen@linux.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@linux.intel.com>
---
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 2015-03-31 16:42:17.106221023 -0700
+++ b/arch/x86/mm/mpx.c 2015-03-31 16:42:17.109221158 -0700
@@ -370,12 +370,6 @@ static __user void *task_get_bounds_dir(
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.
*/
_
next prev parent reply other threads:[~2015-04-01 0:47 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-01 0:46 [PATCH 00/16] x86, mpx updates for 4.1 (take 4) Dave Hansen
2015-04-01 0:46 ` [PATCH 01/16] x86, fpu: wrap get_xsave_addr() to make it safer Dave Hansen
2015-04-22 10:40 ` Borislav Petkov
2015-04-22 13:16 ` Oleg Nesterov
2015-04-22 13:31 ` Borislav Petkov
2015-04-22 14:56 ` Dave Hansen
2015-04-22 15:17 ` Thomas Gleixner
2015-04-22 15:21 ` Borislav Petkov
2015-04-22 15:26 ` Thomas Gleixner
2015-04-22 16:02 ` Dave Hansen
2015-04-22 15:32 ` Oleg Nesterov
2015-04-22 15:58 ` Borislav Petkov
2015-04-01 0:46 ` [PATCH 02/16] x86, mpx: use new tsk_get_xsave_addr() Dave Hansen
2015-04-01 0:46 ` [PATCH 03/16] x86, mpx: trace #BR exceptions Dave Hansen
2015-04-01 0:46 ` [PATCH 04/16] x86, mpx: trace entry to bounds exception paths Dave Hansen
2015-04-01 0:46 ` [PATCH 05/16] x86, mpx: trace ranged MPX operations Dave Hansen
2015-04-01 0:46 ` [PATCH 06/16] x86, mpx: trace allocation of new bounds tables Dave Hansen
2015-04-01 0:46 ` [PATCH 07/16] x86, mpx: boot-time disable Dave Hansen
2015-04-01 0:46 ` [PATCH 08/16] x86: make is_64bit_mm() widely available Dave Hansen
2015-04-01 0:46 ` [PATCH 09/16] x86: make __VIRTUAL_MASK safe to use on 32 bit Dave Hansen
2015-04-01 0:46 ` [PATCH 10/16] x86, mpx: we do not allocate the bounds directory Dave Hansen
2015-04-01 0:46 ` [PATCH 11/16] x86, mpx: remove redundant MPX_BNDCFG_ADDR_MASK Dave Hansen
2015-04-01 0:46 ` [PATCH 12/16] x86, mpx: Add temporary variable to reduce masking Dave Hansen
2015-04-01 0:46 ` [PATCH 13/16] x86, mpx: new directory entry to addr helper Dave Hansen
2015-04-01 0:46 ` [PATCH 14/16] x86, mpx: do 32-bit-only cmpxchg for 32-bit apps Dave Hansen
2015-04-01 0:46 ` [PATCH 15/16] x86, mpx: support 32-bit binaries on 64-bit kernel Dave Hansen
2015-04-01 0:46 ` Dave Hansen [this message]
2015-04-21 15:39 ` [PATCH 00/16] x86, mpx updates for 4.1 (take 4) Dave Hansen
2015-04-22 10:49 ` Borislav Petkov
2015-04-22 14:43 ` Dave Hansen
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