diff options
| author | Fuad Tabba <tabba@google.com> | 2025-07-29 15:54:36 -0700 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2025-08-27 04:35:00 -0400 |
| commit | 36cf63bb5df68836e55e2839f8174b404d47670b (patch) | |
| tree | 494b7fcaf6d95fc10db024b46cc13bbe7260267b /virt | |
| parent | 924121eebddcc6f062d1d2d20aafebe95f6fc290 (diff) | |
KVM: Rename CONFIG_KVM_GENERIC_PRIVATE_MEM to CONFIG_HAVE_KVM_ARCH_GMEM_POPULATE
The original name was vague regarding its functionality. This Kconfig
option specifically enables and gates the kvm_gmem_populate() function,
which is responsible for populating a GPA range with guest data.
The new name, HAVE_KVM_ARCH_GMEM_POPULATE, describes the purpose of the
option: to enable arch-specific guest_memfd population mechanisms. It
also follows the same pattern as the other HAVE_KVM_ARCH_* configuration
options.
This improves clarity for developers and ensures the name accurately
reflects the functionality it controls, especially as guest_memfd
support expands beyond purely "private" memory scenarios.
Temporarily keep KVM_GENERIC_PRIVATE_MEM as an x86-only config so as to
minimize churn, and to hopefully make it easier to see what features
require HAVE_KVM_ARCH_GMEM_POPULATE. On that note, omit GMEM_POPULATE
for KVM_X86_SW_PROTECTED_VM, as regular ol' memset() suffices for
software-protected VMs.
As for KVM_GENERIC_PRIVATE_MEM, a future change will select KVM_GUEST_MEMFD
for all 64-bit KVM builds, at which point the intermediate config will
become obsolete and can/will be dropped.
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Gavin Shan <gshan@redhat.com>
Reviewed-by: Shivank Garg <shivankg@amd.com>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Co-developed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Fuad Tabba <tabba@google.com>
Reviewed-by: Xiaoyao Li <xiaoyao.li@intel.com>
Co-developed-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-ID: <20250729225455.670324-6-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'virt')
| -rw-r--r-- | virt/kvm/Kconfig | 9 | ||||
| -rw-r--r-- | virt/kvm/guest_memfd.c | 2 |
2 files changed, 5 insertions, 6 deletions
diff --git a/virt/kvm/Kconfig b/virt/kvm/Kconfig index e4b400feff94..1b7d5be0b6c4 100644 --- a/virt/kvm/Kconfig +++ b/virt/kvm/Kconfig @@ -116,11 +116,6 @@ config KVM_GUEST_MEMFD select XARRAY_MULTI bool -config KVM_GENERIC_PRIVATE_MEM - select KVM_GENERIC_MEMORY_ATTRIBUTES - select KVM_GUEST_MEMFD - bool - config HAVE_KVM_ARCH_GMEM_PREPARE bool depends on KVM_GUEST_MEMFD @@ -128,3 +123,7 @@ config HAVE_KVM_ARCH_GMEM_PREPARE config HAVE_KVM_ARCH_GMEM_INVALIDATE bool depends on KVM_GUEST_MEMFD + +config HAVE_KVM_ARCH_GMEM_POPULATE + bool + depends on KVM_GUEST_MEMFD diff --git a/virt/kvm/guest_memfd.c b/virt/kvm/guest_memfd.c index 7d85cc33c0bb..b2b50560e80e 100644 --- a/virt/kvm/guest_memfd.c +++ b/virt/kvm/guest_memfd.c @@ -627,7 +627,7 @@ out: } EXPORT_SYMBOL_GPL(kvm_gmem_get_pfn); -#ifdef CONFIG_KVM_GENERIC_PRIVATE_MEM +#ifdef CONFIG_HAVE_KVM_ARCH_GMEM_POPULATE long kvm_gmem_populate(struct kvm *kvm, gfn_t start_gfn, void __user *src, long npages, kvm_gmem_populate_cb post_populate, void *opaque) { |