linux-kernel - [PATCH v2 11/18] KVM: SVM: Make KVM_AMD depend on CPU_SUP_AMD or CPU_SUP

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Message-ID: <20230310214232.806108-12-seanjc@google.com>
Date:   Fri, 10 Mar 2023 13:42:25 -0800
From:   Sean Christopherson <seanjc@...gle.com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
        Sean Christopherson <seanjc@...gle.com>,
        Paolo Bonzini <pbonzini@...hat.com>
Cc:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        Andrew Cooper <Andrew.Cooper3@...rix.com>,
        Kai Huang <kai.huang@...el.com>, Chao Gao <chao.gao@...el.com>
Subject: [PATCH v2 11/18] 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.

Signed-off-by: Sean Christopherson <seanjc@...gle.com>
---
 arch/x86/kvm/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig
index 8e578311ca9d..0d403e9b6a47 100644
--- a/arch/x86/kvm/Kconfig
+++ b/arch/x86/kvm/Kconfig
@@ -102,7 +102,7 @@ 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.
-- 
2.40.0.rc1.284.g88254d51c5-goog