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authorMark Gross <mgross@linux.intel.com>2020-04-27 21:17:15 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2020-06-11 09:22:23 +0200
commit5f8f40583aad4aa3c0fc8a9adaa9f1c988fa8e9e (patch)
tree6de77f885da59dc1481876226c9d57b07c93bf61 /include
parent10873fe64e9d7181c3576134341b6f4d24b32048 (diff)
x86/cpu: Add a steppings field to struct x86_cpu_id
commit e9d7144597b10ff13ff2264c059f7d4a7fbc89ac upstream Intel uses the same family/model for several CPUs. Sometimes the stepping must be checked to tell them apart. On x86 there can be at most 16 steppings. Add a steppings bitmask to x86_cpu_id and a X86_MATCH_VENDOR_FAMILY_MODEL_STEPPING_FEATURE macro and support for matching against family/model/stepping. [ bp: Massage. tglx: Lightweight variant for backporting ] Signed-off-by: Mark Gross <mgross@linux.intel.com> Signed-off-by: Borislav Petkov <bp@suse.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Tony Luck <tony.luck@intel.com> Reviewed-by: Josh Poimboeuf <jpoimboe@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/mod_devicetable.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h
index 1abfe37314a0..df841a72b804 100644
--- a/include/linux/mod_devicetable.h
+++ b/include/linux/mod_devicetable.h
@@ -572,6 +572,10 @@ struct mips_cdmm_device_id {
/*
* MODULE_DEVICE_TABLE expects this struct to be called x86cpu_device_id.
* Although gcc seems to ignore this error, clang fails without this define.
+ *
+ * Note: The ordering of the struct is different from upstream because the
+ * static initializers in kernels < 5.7 still use C89 style while upstream
+ * has been converted to proper C99 initializers.
*/
#define x86cpu_device_id x86_cpu_id
struct x86_cpu_id {
@@ -580,6 +584,7 @@ struct x86_cpu_id {
__u16 model;
__u16 feature; /* bit index */
kernel_ulong_t driver_data;
+ __u16 steppings;
};
#define X86_FEATURE_MATCH(x) \
@@ -588,6 +593,7 @@ struct x86_cpu_id {
#define X86_VENDOR_ANY 0xffff
#define X86_FAMILY_ANY 0
#define X86_MODEL_ANY 0
+#define X86_STEPPING_ANY 0
#define X86_FEATURE_ANY 0 /* Same as FPU, you can't test for that */
/*