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From: Andy Lutomirski <luto@kernel.org>
To: x86@kernel.org
Cc: One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk>,
	Borislav Petkov <bp@alien8.de>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	Brian Gerst <brgerst@gmail.com>,
	Matthew Whitehead <tedheadster@gmail.com>,
	Andy Lutomirski <luto@kernel.org>
Subject: [RFC PATCH 2/6] x86/cpu: Factor out application of forced cpu caps
Date: Mon,  5 Dec 2016 17:01:11 -0800	[thread overview]
Message-ID: <bae0640d9e96a05fd6c020b355d184cdffce4de2.1480985979.git.luto@kernel.org> (raw)
In-Reply-To: <cover.1480985979.git.luto@kernel.org>
In-Reply-To: <cover.1480985979.git.luto@kernel.org>

There are multiple call sites that apply forced CPU caps.  Factor
them into a helper.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
---
 arch/x86/kernel/cpu/common.c | 21 +++++++++++++--------
 1 file changed, 13 insertions(+), 8 deletions(-)

diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 37f031f39e27..347ae0a19380 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -655,6 +655,17 @@ void cpu_detect(struct cpuinfo_x86 *c)
 	}
 }
 
+static void apply_forced_caps(struct cpuinfo_x86 *c)
+{
+	int i;
+
+	for (i = 0; i < NCAPINTS; i++) {
+		c->x86_capability[i] &= ~cpu_caps_cleared[i];
+		c->x86_capability[i] |= cpu_caps_set[i];
+	}
+
+}
+
 void get_cpu_cap(struct cpuinfo_x86 *c)
 {
 	u32 eax, ebx, ecx, edx;
@@ -1042,10 +1053,7 @@ static void identify_cpu(struct cpuinfo_x86 *c)
 		this_cpu->c_identify(c);
 
 	/* Clear/Set all flags overridden by options, after probe */
-	for (i = 0; i < NCAPINTS; i++) {
-		c->x86_capability[i] &= ~cpu_caps_cleared[i];
-		c->x86_capability[i] |= cpu_caps_set[i];
-	}
+	apply_forced_caps(c);
 
 #ifdef CONFIG_X86_64
 	c->apicid = apic->phys_pkg_id(c->initial_apicid, 0);
@@ -1104,10 +1112,7 @@ static void identify_cpu(struct cpuinfo_x86 *c)
 	 * Clear/Set all flags overridden by options, need do it
 	 * before following smp all cpus cap AND.
 	 */
-	for (i = 0; i < NCAPINTS; i++) {
-		c->x86_capability[i] &= ~cpu_caps_cleared[i];
-		c->x86_capability[i] |= cpu_caps_set[i];
-	}
+	apply_forced_caps(c);
 
 	/*
 	 * On SMP, boot_cpu_data holds the common feature set between
-- 
2.9.3

  parent reply	other threads:[~2016-12-06  1:01 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-12-06  1:01 [RFC PATCH 0/6] CPUID and FPU fixes Andy Lutomirski
2016-12-06  1:01 ` [RFC PATCH 1/6] x86/CPU: Add X86_FEATURE_CPUID Andy Lutomirski
2016-12-06  8:08   ` Borislav Petkov
2016-12-06  1:01 ` Andy Lutomirski [this message]
2016-12-06  8:32   ` [RFC PATCH 2/6] x86/cpu: Factor out application of forced cpu caps Borislav Petkov
2016-12-06  1:01 ` [RFC PATCH 3/6] x86/cpu: Re-apply forced caps every time cpu caps are re-read Andy Lutomirski
2016-12-06  8:57   ` Borislav Petkov
2016-12-06  1:01 ` [RFC PATCH 4/6] x86/fpu: Fix "x86/fpu: Legacy x87 FPU detected" message Andy Lutomirski
2016-12-06  9:24   ` Borislav Petkov
2016-12-06 17:59     ` Andy Lutomirski
2016-12-06 18:04       ` Borislav Petkov
2016-12-06  1:01 ` [RFC PATCH 5/6] x86/fpu: Fix CPUID-less FPU detection Andy Lutomirski
2016-12-06  9:40   ` Borislav Petkov
2016-12-06 17:52     ` Andy Lutomirski
2016-12-07  9:42       ` Borislav Petkov
2016-12-06  1:01 ` [RFC PATCH 6/6] x86/fpu: Fix the "Giving up, no FPU found" test Andy Lutomirski

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