x86/cpufeatures: Disentangle SSBD enumeration

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commit 52817587e7 upstream

The SSBD enumeration is similarly to the other bits magically shared
between Intel and AMD though the mechanisms are different.

Make X86_FEATURE_SSBD synthetic and set it depending on the vendor specific
features or family dependent setup.

Change the Intel bit to X86_FEATURE_SPEC_CTRL_SSBD to denote that SSBD is
controlled via MSR_SPEC_CTRL and fix up the usage sites.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Thomas Gleixner 2018-05-10 20:21:36 +02:00 • committed by Greg Kroah-Hartman

parent 8e0836d141

commit bbc0d1c335

6 changed files with 14 additions and 15 deletions

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6

arch/x86/include/asm/cpufeatures.h

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7

arch/x86/kernel/cpu/amd.c

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10

arch/x86/kernel/cpu/bugs.c

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3

arch/x86/kernel/cpu/common.c

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arch/x86/kernel/cpu/intel.c

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arch/x86/kernel/process.c

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