x86/virt: Drop unnecessary check on extended CPUID level in cpu_has_svm()
authorSean Christopherson <seanjc@google.com>
Fri, 21 Jul 2023 20:18:52 +0000 (13:18 -0700)
committerSean Christopherson <seanjc@google.com>
Thu, 3 Aug 2023 22:37:15 +0000 (15:37 -0700)
commit5df8ecfe3632d5879d1f154f7aa8de441b5d1c89
treefaefab43b7722d514cb1db5375729b5693ceb8c2
parent554856b69e3d1faae6f056f75ed6262b5eb01546
x86/virt: Drop unnecessary check on extended CPUID level in cpu_has_svm()

Drop the explicit check on the extended CPUID level in cpu_has_svm(), the
kernel's cached CPUID info will leave the entire SVM leaf unset if said
leaf is not supported by hardware.  Prior to using cached information,
the check was needed to avoid false positives due to Intel's rather crazy
CPUID behavior of returning the values of the maximum supported leaf if
the specified leaf is unsupported.

Fixes: 682a8108872f ("x86/kvm/svm: Simplify cpu_has_svm()")
Link: https://lore.kernel.org/r/20230721201859.2307736-13-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
arch/x86/include/asm/virtext.h