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KVM: x86: Break CONFIG_KVM_X86's direct dependency on KVM_INTEL || KVM_AMD

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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>
This commit is contained in:
Sean Christopherson 2024-11-18 09:20:02 -08:00 committed by Paolo Bonzini
parent 1331343af6
commit 9ee62c33c0
1 changed files with 1 additions and 1 deletions
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arch/x86/kvm/Kconfig
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@ -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 KVM_ELIDE_TLB_FLUSH_IF_YOUNG