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vfio: replace CONFIG_HAVE_KVM with IS_ENABLED(CONFIG_KVM)

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It is more accurate to Check if KVM is enabled, instead of having the
architecture say so.  Architectures always "have" KVM, so for example
checking CONFIG_HAVE_KVM in vfio code is pointless, but if KVM is disabled
in a specific build, there is no need for support code.

Alternatively, the #ifdefs could simply be deleted.  However, this
would add dead code.  For example, when KVM is disabled, there is no
need to include code in VFIO that uses symbol_get, as that symbol_get
would always fail.

Cc: Alex Williamson <alex.williamson@redhat.com>
Cc: x86@kernel.org
Cc: kbingham@kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2024-01-04 15:15:43 -05:00
parent dcf0926e9b
commit 09e33b0455
2 changed files with 3 additions and 3 deletions
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2
drivers/vfio/vfio.h
View File

@ -434,7 +434,7 @@ static inline void vfio_virqfd_exit(void)
}
#endif
#ifdef CONFIG_HAVE_KVM
#if IS_ENABLED(CONFIG_KVM)
void vfio_device_get_kvm_safe(struct vfio_device *device, struct kvm *kvm);
void vfio_device_put_kvm(struct vfio_device *device);
#else

4
drivers/vfio/vfio_main.c
View File

@ -16,7 +16,7 @@
#include <linux/fs.h>
#include <linux/idr.h>
#include <linux/iommu.h>
#ifdef CONFIG_HAVE_KVM
#if IS_ENABLED(CONFIG_KVM)
#include <linux/kvm_host.h>
#endif
#include <linux/list.h>
@ -385,7 +385,7 @@ void vfio_unregister_group_dev(struct vfio_device *device)
}
EXPORT_SYMBOL_GPL(vfio_unregister_group_dev);
#ifdef CONFIG_HAVE_KVM
#if IS_ENABLED(CONFIG_KVM)
void vfio_device_get_kvm_safe(struct vfio_device *device, struct kvm *kvm)
{
void (*pfn)(struct kvm *kvm);