linux-kernel - [tip:x86/fpu] x86/fpu/xstate: Fix XSTATE component offset print out

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Date:	Sun, 10 Jul 2016 11:15:15 -0700
From:	tip-bot for Yu-cheng Yu <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	yu-cheng.yu@...el.com, bp@...en8.de, tglx@...utronix.de,
	dvlasenk@...hat.com, sai.praneeth.prakhya@...el.com,
	dave.hansen@...el.com, quentin.casasnovas@...cle.com,
	oleg@...hat.com, linux-kernel@...r.kernel.org, hpa@...or.com,
	luto@...nel.org, dave.hansen@...ux.intel.com, fenghua.yu@...el.com,
	torvalds@...ux-foundation.org, ravi.v.shankar@...el.com,
	mingo@...nel.org, peterz@...radead.org, brgerst@...il.com,
	jpoimboe@...hat.com
Subject: [tip:x86/fpu] x86/fpu/xstate: Fix XSTATE component offset print out

Commit-ID:  996952e0148026ac0e512db5cad26e14f4267e8b
Gitweb:     http://git.kernel.org/tip/996952e0148026ac0e512db5cad26e14f4267e8b
Author:     Yu-cheng Yu <yu-cheng.yu@...el.com>
AuthorDate: Fri, 17 Jun 2016 13:07:18 -0700
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Sun, 10 Jul 2016 17:12:10 +0200

x86/fpu/xstate: Fix XSTATE component offset print out

Component offset print out was incorrect for XSAVES. Correct it and move
to a separate function.

Signed-off-by: Yu-cheng Yu <yu-cheng.yu@...el.com>
Reviewed-by: Dave Hansen <dave.hansen@...el.com>
Cc: Andy Lutomirski <luto@...nel.org>
Cc: Borislav Petkov <bp@...en8.de>
Cc: Brian Gerst <brgerst@...il.com>
Cc: Dave Hansen <dave.hansen@...ux.intel.com>
Cc: Denys Vlasenko <dvlasenk@...hat.com>
Cc: Fenghua Yu <fenghua.yu@...el.com>
Cc: H. Peter Anvin <hpa@...or.com>
Cc: Josh Poimboeuf <jpoimboe@...hat.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Oleg Nesterov <oleg@...hat.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Quentin Casasnovas <quentin.casasnovas@...cle.com>
Cc: Ravi V. Shankar <ravi.v.shankar@...el.com>
Cc: Sai Praneeth Prakhya <sai.praneeth.prakhya@...el.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Link: http://lkml.kernel.org/r/86602a8ac400626c6eca7125c3e15934866fc38e.1466179491.git.yu-cheng.yu@intel.com
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/kernel/fpu/xstate.c | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c
index 56c0e70..09bac97 100644
--- a/arch/x86/kernel/fpu/xstate.c
+++ b/arch/x86/kernel/fpu/xstate.c
@@ -269,8 +269,6 @@ static void __init setup_xstate_features(void)
 		WARN_ONCE(last_good_offset > xstate_offsets[i],
 			"x86/fpu: misordered xstate at %d\n", last_good_offset);
 		last_good_offset = xstate_offsets[i];
-
-		printk(KERN_INFO "x86/fpu: xstate_offset[%d]: %4d, xstate_sizes[%d]: %4d\n", i, ebx, i, eax);
 	}
 }
 
@@ -374,6 +372,21 @@ static void __init setup_xstate_comp(void)
 }
 
 /*
+ * Print out xstate component offsets and sizes
+ */
+static void __init print_xstate_offset_size(void)
+{
+	int i;
+
+	for (i = FIRST_EXTENDED_XFEATURE; i < XFEATURE_MAX; i++) {
+		if (!xfeature_enabled(i))
+			continue;
+		pr_info("x86/fpu: xstate_offset[%d]: %4d, xstate_sizes[%d]: %4d\n",
+			 i, xstate_comp_offsets[i], i, xstate_sizes[i]);
+	}
+}
+
+/*
  * setup the xstate image representing the init state
  */
 static void __init setup_init_fpu_buf(void)
@@ -707,6 +720,7 @@ void __init fpu__init_system_xstate(void)
 	fpu__init_prepare_fx_sw_frame();
 	setup_init_fpu_buf();
 	setup_xstate_comp();
+	print_xstate_offset_size();
 
 	pr_info("x86/fpu: Enabled xstate features 0x%llx, context size is %d bytes, using '%s' format.\n",
 		xfeatures_mask,