On Fri, Jul 26, 2024 at 02:51:43PM -0400, Paolo Bonzini wrote: > Paolo Bonzini (14): > KVM: x86: disallow pre-fault for SNP VMs before initialization > KVM: guest_memfd: return folio from __kvm_gmem_get_pfn() > KVM: guest_memfd: delay folio_mark_uptodate() until after successful > preparation > KVM: guest_memfd: do not go through struct page > KVM: rename CONFIG_HAVE_KVM_GMEM_* to CONFIG_HAVE_KVM_ARCH_GMEM_* > KVM: guest_memfd: return locked folio from __kvm_gmem_get_pfn > KVM: guest_memfd: delay kvm_gmem_prepare_folio() until the memory is > passed to the guest > KVM: guest_memfd: make kvm_gmem_prepare_folio() operate on a single > struct kvm > KVM: remove kvm_arch_gmem_prepare_needed() > KVM: guest_memfd: move check for already-populated page to common code > KVM: cleanup and add shortcuts to kvm_range_has_memory_attributes() > KVM: extend kvm_range_has_memory_attributes() to check subset of > attributes > KVM: guest_memfd: let kvm_gmem_populate() operate only on private gfns > KVM: guest_memfd: abstract how prepared folios are recorded Re-tested series with multiple SNP guests with/without experimental THP patches on top. Also re-tested using the following SNP self tests (I believe Pratik has a newer version he'll be submitting soon): https://github.com/mdroth/linux/commits/snp-uptodate2-kst4/ x86_64/coco_pre_fault_memory_test Series: Tested-by: Michael Roth <michael.roth@xxxxxxx> > > v1->v2: > - patch 1: new > - patch 7: point out benign race between page fault and hole-punch > - patch 7: clean up comments > - patch 10: clean up commit message > - patch 11: remove ";;" > - patch 13: fix length argument to kvm_range_has_memory_attributes() > - patch 14: new > > Documentation/virt/kvm/api.rst | 6 + > arch/x86/include/asm/kvm_host.h | 1 + > arch/x86/kvm/Kconfig | 4 +- > arch/x86/kvm/mmu/mmu.c | 5 +- > arch/x86/kvm/svm/sev.c | 17 +-- > arch/x86/kvm/svm/svm.c | 1 + > arch/x86/kvm/x86.c | 12 +- > include/linux/kvm_host.h | 9 +- > virt/kvm/Kconfig | 4 +- > virt/kvm/guest_memfd.c | 226 +++++++++++++++++++------------- > virt/kvm/kvm_main.c | 73 +++++------ > 11 files changed, 206 insertions(+), 152 deletions(-) > > -- > 2.43.0 > >
