From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754928AbbINMW7 (ORCPT ); Mon, 14 Sep 2015 08:22:59 -0400 Received: from terminus.zytor.com ([198.137.202.10]:35082 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754779AbbINMW4 (ORCPT ); Mon, 14 Sep 2015 08:22:56 -0400 Date: Mon, 14 Sep 2015 05:21:51 -0700 From: tip-bot for Dave Hansen Message-ID: Cc: fenghua.yu@intel.com, dave.hansen@linux.intel.com, bp@alien8.de, peterz@infradead.org, linux-kernel@vger.kernel.org, torvalds@linux-foundation.org, dvlasenk@redhat.com, luto@amacapital.net, hpa@zytor.com, mingo@kernel.org, brgerst@gmail.com, tim.c.chen@linux.intel.com, tglx@linutronix.de Reply-To: dave.hansen@linux.intel.com, fenghua.yu@intel.com, torvalds@linux-foundation.org, peterz@infradead.org, linux-kernel@vger.kernel.org, dvlasenk@redhat.com, bp@alien8.de, luto@amacapital.net, brgerst@gmail.com, tim.c.chen@linux.intel.com, tglx@linutronix.de, hpa@zytor.com, mingo@kernel.org In-Reply-To: <20150902233128.A8C0BF51@viggo.jf.intel.com> References: <20150902233128.A8C0BF51@viggo.jf.intel.com> To: linux-tip-commits@vger.kernel.org Subject: [tip:x86/fpu] x86/fpu: Rework XSTATE_* macros to remove magic '2' Git-Commit-ID: 8a93c9e0dca131a0bf330ea9d1e57c1bcf3824ad X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: 8a93c9e0dca131a0bf330ea9d1e57c1bcf3824ad Gitweb: http://git.kernel.org/tip/8a93c9e0dca131a0bf330ea9d1e57c1bcf3824ad Author: Dave Hansen AuthorDate: Wed, 2 Sep 2015 16:31:28 -0700 Committer: Ingo Molnar CommitDate: Mon, 14 Sep 2015 12:21:58 +0200 x86/fpu: Rework XSTATE_* macros to remove magic '2' The 'xstate.c' code has a bunch of references to '2'. This is because we have a lot more work to do for the "extended" xstates than the "legacy" ones and state component 2 is the first "extended" state. This patch replaces all of the instances of '2' with FIRST_EXTENDED_XFEATURE, which clearly explains what is going on. Signed-off-by: Dave Hansen Cc: Andy Lutomirski Cc: Borislav Petkov Cc: Brian Gerst Cc: Denys Vlasenko Cc: Fenghua Yu Cc: H. Peter Anvin Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: Tim Chen Cc: dave@sr71.net Cc: linux-kernel@vger.kernel.org Link: http://lkml.kernel.org/r/20150902233128.A8C0BF51@viggo.jf.intel.com Signed-off-by: Ingo Molnar --- arch/x86/include/asm/fpu/types.h | 2 ++ arch/x86/kernel/fpu/xstate.c | 13 +++++++------ 2 files changed, 9 insertions(+), 6 deletions(-) diff --git a/arch/x86/include/asm/fpu/types.h b/arch/x86/include/asm/fpu/types.h index 8764df3..9f57930 100644 --- a/arch/x86/include/asm/fpu/types.h +++ b/arch/x86/include/asm/fpu/types.h @@ -126,6 +126,8 @@ enum xfeature { | XFEATURE_MASK_ZMM_Hi256 \ | XFEATURE_MASK_Hi16_ZMM) +#define FIRST_EXTENDED_XFEATURE XFEATURE_YMM + /* * There are 16x 256-bit AVX registers named YMM0-YMM15. * The low 128 bits are aliased to the 16 SSE registers (XMM0-XMM15) diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c index f94e236..c1a0bf4 100644 --- a/arch/x86/kernel/fpu/xstate.c +++ b/arch/x86/kernel/fpu/xstate.c @@ -200,7 +200,7 @@ static void __init setup_xstate_features(void) xfeatures_nr = fls64(xfeatures_mask); - for (leaf = 2; leaf < xfeatures_nr; leaf++) { + for (leaf = FIRST_EXTENDED_XFEATURE; leaf < xfeatures_nr; leaf++) { cpuid_count(XSTATE_CPUID, leaf, &eax, &ebx, &ecx, &edx); xstate_offsets[leaf] = ebx; @@ -252,7 +252,7 @@ static void __init setup_xstate_comp(void) xstate_comp_offsets[1] = offsetof(struct fxregs_state, xmm_space); if (!cpu_has_xsaves) { - for (i = 2; i < xfeatures_nr; i++) { + for (i = FIRST_EXTENDED_XFEATURE; i < xfeatures_nr; i++) { if (test_bit(i, (unsigned long *)&xfeatures_mask)) { xstate_comp_offsets[i] = xstate_offsets[i]; xstate_comp_sizes[i] = xstate_sizes[i]; @@ -261,15 +261,16 @@ static void __init setup_xstate_comp(void) return; } - xstate_comp_offsets[2] = FXSAVE_SIZE + XSAVE_HDR_SIZE; + xstate_comp_offsets[FIRST_EXTENDED_XFEATURE] = + FXSAVE_SIZE + XSAVE_HDR_SIZE; - for (i = 2; i < xfeatures_nr; i++) { + for (i = FIRST_EXTENDED_XFEATURE; i < xfeatures_nr; i++) { if (test_bit(i, (unsigned long *)&xfeatures_mask)) xstate_comp_sizes[i] = xstate_sizes[i]; else xstate_comp_sizes[i] = 0; - if (i > 2) + if (i > FIRST_EXTENDED_XFEATURE) xstate_comp_offsets[i] = xstate_comp_offsets[i-1] + xstate_comp_sizes[i-1]; @@ -325,7 +326,7 @@ static unsigned int __init calculate_xstate_size(void) } calculated_xstate_size = FXSAVE_SIZE + XSAVE_HDR_SIZE; - for (i = 2; i < 64; i++) { + for (i = FIRST_EXTENDED_XFEATURE; i < 64; i++) { if (test_bit(i, (unsigned long *)&xfeatures_mask)) { cpuid_count(XSTATE_CPUID, i, &eax, &ebx, &ecx, &edx); calculated_xstate_size += eax;