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| author | Michael Roth <michael.roth@amd.com> | 2023-12-30 20:23:21 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2024-05-10 20:11:48 +0300 |
| commit | a90764f0e4ed5350cc9caeb384e0fb356c032587 (patch) | |
| tree | 937a1302c4b4ebdcccca9c1a52e40916e7ecb05e /include | |
| parent | 1f6c06b177513e8a47c43e95d1985dbd9cff3ddd (diff) | |
| download | linux-a90764f0e4ed5350cc9caeb384e0fb356c032587.tar.xz | |
KVM: guest_memfd: Add hook for invalidating memory
In some cases, like with SEV-SNP, guest memory needs to be updated in a
platform-specific manner before it can be safely freed back to the host.
Wire up arch-defined hooks to the .free_folio kvm_gmem_aops callback to
allow for special handling of this sort when freeing memory in response
to FALLOC_FL_PUNCH_HOLE operations and when releasing the inode, and go
ahead and define an arch-specific hook for x86 since it will be needed
for handling memory used for SEV-SNP guests.
Signed-off-by: Michael Roth <michael.roth@amd.com>
Message-Id: <20231230172351.574091-6-michael.roth@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/kvm_host.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 1ae65774d9fa..b43b96f876fe 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -2475,4 +2475,8 @@ typedef int (*kvm_gmem_populate_cb)(struct kvm *kvm, gfn_t gfn, kvm_pfn_t pfn, long kvm_gmem_populate(struct kvm *kvm, gfn_t gfn, void __user *src, long npages, kvm_gmem_populate_cb post_populate, void *opaque); +#ifdef CONFIG_HAVE_KVM_GMEM_INVALIDATE +void kvm_arch_gmem_invalidate(kvm_pfn_t start, kvm_pfn_t end); +#endif + #endif |