linux-kernel - [tip: x86/fpu] x86/fpu/xstate: Simplify print_xstate

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Message-ID: <174068307835.10177.5760172564992178850.tip-bot2@tip-bot2>
Date: Thu, 27 Feb 2025 19:04:37 -0000
From: "tip-bot2 for Chang S. Bae" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: "Chang S. Bae" <chang.seok.bae@...el.com>, Ingo Molnar <mingo@...nel.org>,
 Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
 linux-kernel@...r.kernel.org
Subject: [tip: x86/fpu] x86/fpu/xstate: Simplify print_xstate_features()

The following commit has been merged into the x86/fpu branch of tip:

Commit-ID:     69a2fdf446049ae31be4a14a0cf16f2f18f09b6c
Gitweb:        https://git.kernel.org/tip/69a2fdf446049ae31be4a14a0cf16f2f18f09b6c
Author:        Chang S. Bae <chang.seok.bae@...el.com>
AuthorDate:    Thu, 27 Feb 2025 10:44:46 -08:00
Committer:     Ingo Molnar <mingo@...nel.org>
CommitterDate: Thu, 27 Feb 2025 19:54:41 +01:00

x86/fpu/xstate: Simplify print_xstate_features()

print_xstate_features() currently invokes print_xstate_feature() multiple
times on separate lines, which can be simplified in a loop.

print_xstate_feature() already checks the feature's enabled status and is
only called within print_xstate_features(). Inline print_xstate_feature()
and iterate over features in a loop to streamline the enabling message.

No functional changes.

Signed-off-by: Chang S. Bae <chang.seok.bae@...el.com>
Signed-off-by: Ingo Molnar <mingo@...nel.org>
Reviewed-by: Dave Hansen <dave.hansen@...ux.intel.com>
Link: https://lore.kernel.org/r/20250227184502.10288-2-chang.seok.bae@intel.com
---
 arch/x86/kernel/fpu/xstate.c | 30 +++++++++---------------------
 1 file changed, 9 insertions(+), 21 deletions(-)

diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c
index 27417b6..6a41d16 100644
--- a/arch/x86/kernel/fpu/xstate.c
+++ b/arch/x86/kernel/fpu/xstate.c
@@ -259,32 +259,20 @@ static void __init setup_xstate_cache(void)
 	}
 }
 
-static void __init print_xstate_feature(u64 xstate_mask)
-{
-	const char *feature_name;
-
-	if (cpu_has_xfeatures(xstate_mask, &feature_name))
-		pr_info("x86/fpu: Supporting XSAVE feature 0x%03Lx: '%s'\n", xstate_mask, feature_name);
-}
-
 /*
  * Print out all the supported xstate features:
  */
 static void __init print_xstate_features(void)
 {
-	print_xstate_feature(XFEATURE_MASK_FP);
-	print_xstate_feature(XFEATURE_MASK_SSE);
-	print_xstate_feature(XFEATURE_MASK_YMM);
-	print_xstate_feature(XFEATURE_MASK_BNDREGS);
-	print_xstate_feature(XFEATURE_MASK_BNDCSR);
-	print_xstate_feature(XFEATURE_MASK_OPMASK);
-	print_xstate_feature(XFEATURE_MASK_ZMM_Hi256);
-	print_xstate_feature(XFEATURE_MASK_Hi16_ZMM);
-	print_xstate_feature(XFEATURE_MASK_PKRU);
-	print_xstate_feature(XFEATURE_MASK_PASID);
-	print_xstate_feature(XFEATURE_MASK_CET_USER);
-	print_xstate_feature(XFEATURE_MASK_XTILE_CFG);
-	print_xstate_feature(XFEATURE_MASK_XTILE_DATA);
+	int i;
+
+	for (i = 0; i < XFEATURE_MAX; i++) {
+		u64 mask = BIT_ULL(i);
+		const char *name;
+
+		if (cpu_has_xfeatures(mask, &name))
+			pr_info("x86/fpu: Supporting XSAVE feature 0x%03Lx: '%s'\n", mask, name);
+	}
 }
 
 /*