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 16/17] x86, mpx: allow mixed binaries again
Date: Wed, 22 Apr 2015 11:27:50 -0700 [thread overview]
Message-ID: <20150422182750.9FBA5EF6@viggo.jf.intel.com> (raw)
In-Reply-To: <20150422182729.0512E57D@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 2015-04-22 11:16:23.832073480 -0700
+++ b/arch/x86/mm/mpx.c 2015-04-22 11:16:23.836073661 -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:[~2015-04-22 18:27 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-22 18:27 [PATCH 00/17] x86, mpx updates for 4.2 (take 5) Dave Hansen
2015-04-22 18:27 ` [PATCH 01/17] x86, fpu: wrap get_xsave_addr() to make it safer Dave Hansen
2015-04-25 9:31 ` Borislav Petkov
2015-05-05 17:27 ` Borislav Petkov
2015-05-08 17:42 ` Dave Hansen
2015-04-22 18:27 ` [PATCH 02/17] x86, mpx: use new tsk_get_xsave_addr() Dave Hansen
2015-04-22 19:18 ` Yu, Fenghua
2015-04-22 19:32 ` Dave Hansen
2015-04-22 21:21 ` Yu, Fenghua
2015-04-22 18:27 ` [PATCH 03/17] x86, mpx: trace #BR exceptions Dave Hansen
2015-04-22 18:27 ` [PATCH 04/17] x86, mpx: trace entry to bounds exception paths Dave Hansen
2015-04-22 18:27 ` [PATCH 05/17] x86, mpx: trace ranged MPX operations Dave Hansen
2015-04-22 18:27 ` [PATCH 06/17] x86, mpx: trace allocation of new bounds tables Dave Hansen
2015-04-22 18:27 ` [PATCH 07/17] x86, mpx: boot-time disable Dave Hansen
2015-04-22 18:27 ` [PATCH 08/17] x86: make is_64bit_mm() widely available Dave Hansen
2015-04-22 18:27 ` [PATCH 09/17] x86: make __VIRTUAL_MASK safe to use on 32 bit Dave Hansen
2015-04-22 18:27 ` [PATCH 10/17] x86, mpx: we do not allocate the bounds directory Dave Hansen
2015-04-22 18:27 ` [PATCH 11/17] x86, mpx: remove redundant MPX_BNDCFG_ADDR_MASK Dave Hansen
2015-04-22 18:27 ` [PATCH 12/17] x86, mpx: Add temporary variable to reduce masking Dave Hansen
2015-04-22 18:27 ` [PATCH 13/17] x86, mpx: new directory entry to addr helper Dave Hansen
2015-04-22 18:27 ` [PATCH 14/17] x86, mpx: do 32-bit-only cmpxchg for 32-bit apps Dave Hansen
2015-04-22 18:27 ` [PATCH 15/17] x86, mpx: support 32-bit binaries on 64-bit kernel Dave Hansen
2015-04-22 18:27 ` Dave Hansen [this message]
2015-04-22 18:27 ` [PATCH 17/17] x86, mpx: cleanup: do not pass task around when unnecessary Dave Hansen
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