Thread (72 messages) 72 messages, 9 authors, 2021-08-05

Re: [PATCH 02/14] x86/cpu: Extract cpuid helpers to arch-independent

From: "Winiarska, Iwona" <iwona.winiarska@intel.com>
Date: 2021-07-15 16:58:38
Also in: linux-arm-kernel, linux-aspeed, linux-devicetree, linux-hwmon, lkml, openbmc

On Thu, 2021-07-15 at 16:51 +0000, Winiarska, Iwona wrote:
On Wed, 2021-07-14 at 16:58 +0000, Williams, Dan J wrote:
quoted
On Tue, 2021-07-13 at 00:04 +0200, Iwona Winiarska wrote:
quoted
diff --git a/arch/x86/include/asm/cpu.h
b/arch/x86/include/asm/cpu.h
index 33d41e350c79..2a663a05a795 100644
--- a/arch/x86/include/asm/cpu.h
+++ b/arch/x86/include/asm/cpu.h
@@ -37,9 +37,6 @@ extern int _debug_hotplug_cpu(int cpu, int
action);
 
 int mwait_usable(const struct cpuinfo_x86 *);
 
-unsigned int x86_family(unsigned int sig);
-unsigned int x86_model(unsigned int sig);
-unsigned int x86_stepping(unsigned int sig);
 #ifdef CONFIG_CPU_SUP_INTEL
 extern void __init sld_setup(struct cpuinfo_x86 *c);
 extern void switch_to_sld(unsigned long tifn);
diff --git a/arch/x86/include/asm/microcode.h
b/arch/x86/include/asm/microcode.h
index ab45a220fac4..4b0eabf63b98 100644
--- a/arch/x86/include/asm/microcode.h
+++ b/arch/x86/include/asm/microcode.h
@@ -2,9 +2,9 @@
 #ifndef _ASM_X86_MICROCODE_H
 #define _ASM_X86_MICROCODE_H
 
-#include <asm/cpu.h>
 #include <linux/earlycpio.h>
 #include <linux/initrd.h>
+#include <linux/x86/cpu.h>
Has this patch set received a build success notification from the
kbuild robot? I.e. are you sure that this include was only here for
the

unsigned int x86_family(unsigned int sig);
unsigned int x86_model(unsigned int sig);
unsigned int x86_stepping(unsigned int sig);

...helpers. All the other replacements look trivially verifiable as
only needing these 3 helpers.
Missed the rest of your email in my previous post - sorry.
Yes - and before that I ran this through allyesconfig on x86.
quoted
quoted
 
 struct ucode_patch {
        struct list_head plist;
diff --git a/arch/x86/kvm/cpuid.h b/arch/x86/kvm/cpuid.h
index c99edfff7f82..bf070d2a2175 100644
--- a/arch/x86/kvm/cpuid.h
+++ b/arch/x86/kvm/cpuid.h
@@ -4,10 +4,11 @@
 
 #include "x86.h"
 #include "reverse_cpuid.h"
-#include <asm/cpu.h>
 #include <asm/processor.h>
 #include <uapi/asm/kvm_para.h>
 
+#include <linux/x86/cpu.h>
+
 extern u32 kvm_cpu_caps[NR_KVM_CPU_CAPS] __read_mostly;
 void kvm_set_cpu_caps(void);
 
diff --git a/arch/x86/lib/Makefile b/arch/x86/lib/Makefile
index bad4dee4f0e4..fd73c1b72c3e 100644
--- a/arch/x86/lib/Makefile
+++ b/arch/x86/lib/Makefile
@@ -41,7 +41,7 @@ clean-files := inat-tables.c
 
 obj-$(CONFIG_SMP) += msr-smp.o cache-smp.o
 
-lib-y := delay.o misc.o cmdline.o cpu.o
+lib-y := delay.o misc.o cmdline.o
 lib-y += usercopy_$(BITS).o usercopy.o getuser.o putuser.o
 lib-y += memcpy_$(BITS).o
 lib-$(CONFIG_ARCH_HAS_COPY_MC) += copy_mc.o copy_mc_64.o
diff --git a/drivers/edac/mce_amd.c b/drivers/edac/mce_amd.c
index 27d56920b469..f545f5fad02c 100644
--- a/drivers/edac/mce_amd.c
+++ b/drivers/edac/mce_amd.c
@@ -1,8 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0-only
 #include <linux/module.h>
 #include <linux/slab.h>
-
-#include <asm/cpu.h>
+#include <linux/x86/cpu.h>
 
 #include "mce_amd.h"
 
diff --git a/include/linux/x86/cpu.h b/include/linux/x86/cpu.h
new file mode 100644
index 000000000000..5f383d47886d
--- /dev/null
+++ b/include/linux/x86/cpu.h
@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef _LINUX_X86_CPU_H
+#define _LINUX_X86_CPU_H
+
+unsigned int x86_family(unsigned int sig);
+unsigned int x86_model(unsigned int sig);
+unsigned int x86_stepping(unsigned int sig);
+
+#endif /* _LINUX_X86_CPU_H */
diff --git a/lib/Kconfig b/lib/Kconfig
index d241fe476fda..cc28bc1f2d84 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -718,3 +718,8 @@ config PLDMFW
 
 config ASN1_ENCODER
        tristate
+
+config GENERIC_LIB_X86
+       bool
+       depends on X86
+       default n
No need for a "default n" line. Omitting a default is the same as
"default n".
Sure - I'll fix this in v2.

Thanks
-Iwona
quoted
  
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