x86/cpu, kvm: Add support for CPUID_80000021_EAX
commit 8415a748 upstream. Add support for CPUID leaf 80000021, EAX. The majority of the features will be used in the kernel and thus a separate leaf is appropriate. Include KVM's reverse_cpuid entry because features are used by VM guests, too. [ bp: Massage commit message. ] Signed-off-by: Kim Phillips <kim.phillips@amd.com> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Acked-by: Sean Christopherson <seanjc@google.com> Link: https://lore.kernel.org/r/20230124163319.2277355-2-kim.phillips@amd.com [bwh: Backported to 6.1: adjust context] Signed-off-by: Ben Hutchings <benh@debian.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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