diff mbox series

[v2,2/5] KVM: fix direction of dependency on MMU notifiers

Message ID 20240108124740.114453-3-pbonzini@redhat.com (mailing list archive)
State New, archived
Headers show
Series Replace CONFIG_HAVE_KVM with more appropriate symbols. | expand

Commit Message

Paolo Bonzini Jan. 8, 2024, 12:47 p.m. UTC 
KVM_GENERIC_MEMORY_ATTRIBUTES requires the generic MMU notifier code, because
it uses kvm_mmu_invalidate_begin/end.  However, it would not work with a bespoke
implementation of MMU notifiers that does not use KVM_GENERIC_MMU_NOTIFIER,
because most likely it would not synchronize correctly on invalidation.  So
the right thing to do is to note the problematic configuration if the
architecture does not select itself KVM_GENERIC_MMU_NOTIFIER; not to
enable it blindly.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 virt/kvm/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/virt/kvm/Kconfig b/virt/kvm/Kconfig
index ace72be98fb2..184dab4ee871 100644
--- a/virt/kvm/Kconfig
+++ b/virt/kvm/Kconfig
@@ -97,7 +97,7 @@  config KVM_GENERIC_MMU_NOTIFIER
        bool
 
 config KVM_GENERIC_MEMORY_ATTRIBUTES
-       select KVM_GENERIC_MMU_NOTIFIER
+       depends on KVM_GENERIC_MMU_NOTIFIER
        bool
 
 config KVM_PRIVATE_MEM