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| author | Sean Christopherson <sean.j.christopherson@intel.com> | 2018-11-05 10:57:25 -0800 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2018-11-05 20:54:20 +0100 |
| commit | 43500e6f294d175602606c77bfb0d8cd4ea88b4f (patch) | |
| tree | 947603ccc3f93252a35ca614ebc9b8353f01a230 /arch/x86/kernel/cpu/cpu.h | |
| parent | 651022382c7f8da46cb4872a545ee1da6d097d2a (diff) | |
| download | blackbird-obmc-linux-43500e6f294d175602606c77bfb0d8cd4ea88b4f.tar.gz blackbird-obmc-linux-43500e6f294d175602606c77bfb0d8cd4ea88b4f.zip | |
x86/cpufeatures: Remove get_scattered_cpuid_leaf()
get_scattered_cpuid_leaf() was added[1] to help KVM rebuild hardware-
defined leafs that are rearranged by Linux to avoid bloating the
x86_capability array. Eventually, the last consumer of the function was
removed[2], but the function itself was kept, perhaps even intentionally
as a form of documentation.
Remove get_scattered_cpuid_leaf() as it is currently not used by KVM.
Furthermore, simply rebuilding the "real" leaf does not resolve all of
KVM's woes when it comes to exposing a scattered CPUID feature, i.e.
keeping the function as documentation may be counter-productive in some
scenarios, e.g. when KVM needs to do more than simply expose the leaf.
[1] 47bdf3378d62 ("x86/cpuid: Provide get_scattered_cpuid_leaf()")
[2] b7b27aa011a1 ("KVM/x86: Update the reverse_cpuid list to include CPUID_7_EDX")
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
CC: "H. Peter Anvin" <hpa@zytor.com>
CC: Ingo Molnar <mingo@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
CC: Thomas Gleixner <tglx@linutronix.de>
CC: x86-ml <x86@kernel.org>
Link: http://lkml.kernel.org/r/20181105185725.18679-1-sean.j.christopherson@intel.com
Diffstat (limited to 'arch/x86/kernel/cpu/cpu.h')
| -rw-r--r-- | arch/x86/kernel/cpu/cpu.h | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/arch/x86/kernel/cpu/cpu.h b/arch/x86/kernel/cpu/cpu.h index da5446acc241..5eb946b9a9f3 100644 --- a/arch/x86/kernel/cpu/cpu.h +++ b/arch/x86/kernel/cpu/cpu.h @@ -49,9 +49,6 @@ extern void get_cpu_cap(struct cpuinfo_x86 *c); extern void get_cpu_address_sizes(struct cpuinfo_x86 *c); extern void cpu_detect_cache_sizes(struct cpuinfo_x86 *c); extern void init_scattered_cpuid_features(struct cpuinfo_x86 *c); -extern u32 get_scattered_cpuid_leaf(unsigned int level, - unsigned int sub_leaf, - enum cpuid_regs_idx reg); extern void init_intel_cacheinfo(struct cpuinfo_x86 *c); extern void init_amd_cacheinfo(struct cpuinfo_x86 *c); extern void init_hygon_cacheinfo(struct cpuinfo_x86 *c); |
