linux-kernel - [PATCH 5.12 131/161] dmaengine: idxd: Use cpu_feature

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Date:   Tue,  8 Jun 2021 20:27:41 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Borislav Petkov <bp@...e.de>,
        Thomas Gleixner <tglx@...utronix.de>,
        Vinod Koul <vkoul@...nel.org>
Subject: [PATCH 5.12 131/161] dmaengine: idxd: Use cpu_feature_enabled()

From: Borislav Petkov <bp@...e.de>

commit 74b2fc882d380d8fafc2a26f01d401c2a7beeadb upstream.

When testing x86 feature bits, use cpu_feature_enabled() so that
build-disabled features can remain off, regardless of what CPUID says.

Fixes: 8e50d392652f ("dmaengine: idxd: Add shared workqueue support")
Signed-off-by: Borislav Petkov <bp@...e.de>
Reviewed-by: Thomas Gleixner <tglx@...utronix.de>
Acked-By: Vinod Koul <vkoul@...nel.org>
Cc: <stable@...r.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/dma/idxd/init.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/dma/idxd/init.c
+++ b/drivers/dma/idxd/init.c
@@ -675,12 +675,12 @@ static int __init idxd_init_module(void)
 	 * If the CPU does not support MOVDIR64B or ENQCMDS, there's no point in
 	 * enumerating the device. We can not utilize it.
 	 */
-	if (!boot_cpu_has(X86_FEATURE_MOVDIR64B)) {
+	if (!cpu_feature_enabled(X86_FEATURE_MOVDIR64B)) {
 		pr_warn("idxd driver failed to load without MOVDIR64B.\n");
 		return -ENODEV;
 	}
 
-	if (!boot_cpu_has(X86_FEATURE_ENQCMD))
+	if (!cpu_feature_enabled(X86_FEATURE_ENQCMD))
 		pr_warn("Platform does not have ENQCMD(S) support.\n");
 	else
 		support_enqcmd = true;