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| author | Michael Roth <michael.roth@amd.com> | 2023-12-30 18:23:21 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2024-05-10 19:11:48 +0200 |
| commit | a90764f0e4ed5350cc9caeb384e0fb356c032587 (patch) | |
| tree | 937a1302c4b4ebdcccca9c1a52e40916e7ecb05e /arch/x86/include/asm/kvm-x86-ops.h | |
| parent | KVM: guest_memfd: Add interface for populating gmem pages with user data (diff) | |
| download | linux-a90764f0e4ed5350cc9caeb384e0fb356c032587.tar.xz linux-a90764f0e4ed5350cc9caeb384e0fb356c032587.zip | |
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 'arch/x86/include/asm/kvm-x86-ops.h')
| -rw-r--r-- | arch/x86/include/asm/kvm-x86-ops.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/include/asm/kvm-x86-ops.h b/arch/x86/include/asm/kvm-x86-ops.h index d26fcad13e36..c81990937ab4 100644 --- a/arch/x86/include/asm/kvm-x86-ops.h +++ b/arch/x86/include/asm/kvm-x86-ops.h @@ -140,6 +140,7 @@ KVM_X86_OP_OPTIONAL_RET0(vcpu_get_apicv_inhibit_reasons); KVM_X86_OP_OPTIONAL(get_untagged_addr) KVM_X86_OP_OPTIONAL(alloc_apic_backing_page) KVM_X86_OP_OPTIONAL_RET0(gmem_prepare) +KVM_X86_OP_OPTIONAL(gmem_invalidate) #undef KVM_X86_OP #undef KVM_X86_OP_OPTIONAL |