KVM: SVM: Make KVM_AMD depend on CPU_SUP_AMD or CPU_SUP_HYGON

Make building KVM SVM support depend on support for AMD or Hygon.  KVM
already effectively restricts SVM support to AMD and Hygon by virtue of
the vendor string checks in cpu_has_svm(), and KVM VMX supports depends
on one of its three known vendors (Intel, Centaur, or Zhaoxin).

Add the CPU_SUP_HYGON clause even though CPU_SUP_HYGON selects CPU_SUP_AMD
to document that KVM SVM support isn't just for AMD CPUs, and to prevent
breakage should Hygon support ever become a standalone thing.

Link: https://lore.kernel.org/r/20230721201859.2307736-12-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig
index 89ca7f4c1464337bd42646caa24d37c3df2464d3..66dbd1f4d57df4e262415cfbac51582a183f84eb 100644 (file)
--- a/arch/x86/kvm/Kconfig
+++ b/arch/x86/kvm/Kconfig
@@ -101,7 +101,7 @@ config X86_SGX_KVM
 
 config KVM_AMD
        tristate "KVM for AMD processors support"
-       depends on KVM
+       depends on KVM && (CPU_SUP_AMD || CPU_SUP_HYGON)
        help
          Provides support for KVM on AMD processors equipped with the AMD-V
          (SVM) extensions.