From 952741d54de920cac316998dda298c2bcc4b65d1 Mon Sep 17 00:00:00 2001
From: Sean Christopherson <seanjc@google.com>
Date: Mon, 18 Nov 2024 09:20:02 -0800
Subject: [PATCH] KVM: x86: Break CONFIG_KVM_X86's direct dependency on
KVM_INTEL || KVM_AMD
commit 9ee62c33c0fe017ee02501a877f6f562363122fa upstream.
Rework CONFIG_KVM_X86's dependency to only check if KVM_INTEL or KVM_AMD
is selected, i.e. not 'n'. Having KVM_X86 depend directly on the vendor
modules results in KVM_X86 being set to 'm' if at least one of KVM_INTEL
or KVM_AMD is enabled, but neither is 'y', regardless of the value of KVM
itself.
The documentation for def_tristate doesn't explicitly state that this is
the intended behavior, but it does clearly state that the "if" section is
parsed as a dependency, i.e. the behavior is consistent with how tristate
dependencies are handled in general.
Optionally dependencies for this default value can be added with "if".
Fixes: ea4290d77bda ("KVM: x86: leave kvm.ko out of the build if no vendor module is requested")
Cc: stable@vger.kernel.org
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-ID: <20241118172002.1633824-3-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
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 0b64ec12d2090..d7f27a3276549 100644
--- a/arch/x86/kvm/Kconfig
+++ b/arch/x86/kvm/Kconfig
@@ -18,7 +18,7 @@ menuconfig VIRTUALIZATION
if VIRTUALIZATION
config KVM_X86
- def_tristate KVM if KVM_INTEL || KVM_AMD
+ def_tristate KVM if (KVM_INTEL != n || KVM_AMD != n)
select KVM_COMMON
select KVM_GENERIC_MMU_NOTIFIER
select HAVE_KVM_IRQCHIP
--
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