[GIT PULL] KVM changes for Linux 6.11-rc2

[Paolo Bonzini]

Linus,

The following changes since commit 8400291e289ee6b2bf9779ff1c83a291501f017b:

  Linux 6.11-rc1 (2024-07-28 14:19:55 -0700)

are available in the Git repository at:

  https://git.kernel.org/pub/scm/virt/kvm/kvm.git tags/for-linus

for you to fetch changes up to 1773014a975919195be71646fc2c2cad1570fce4:

  Merge branch 'kvm-fixes' into HEAD (2024-08-02 12:33:43 -0400)

The bulk of the changes here is a largish change to guest_memfd, delaying
the clearing and encryption of guest-private pages until they are
actually added to guest page tables.  This started as "let's make it
impossible to misuse the API" for SEV-SNP; but then it ballooned a bit.
The new logic is generally simpler and more ready for hugepage support
in guest_memfd.

Thanks,

Paolo
----------------------------------------------------------------
* fix latent bug in how usage of large pages is determined for
  confidential VMs

* fix "underline too short" in docs

* eliminate log spam from limited APIC timer periods

* disallow pre-faulting of memory before SEV-SNP VMs are initialized

* delay clearing and encrypting private memory until it is added to
  guest page tables

* this change also enables another small cleanup: the checks in
  SNP_LAUNCH_UPDATE that limit it to non-populated, private pages
  can now be moved in the common kvm_gmem_populate() function

* fix compilation error that the RISC-V merge introduced in selftests

----------------------------------------------------------------
Ackerley Tng (1):
      KVM: x86/mmu: fix determination of max NPT mapping level for private pages

Chang Yu (1):
      KVM: Documentation: Fix title underline too short warning

Jim Mattson (1):
      KVM: x86: Eliminate log spam from limited APIC timer periods

Paolo Bonzini (16):
      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
      Merge tag 'kvm-riscv-fixes-6.11-1' of https://github.com/kvm-riscv/linux into HEAD
      Merge branch 'kvm-fixes' into HEAD

Yong-Xuan Wang (1):
      KVM: riscv: selftests: Fix compile error

 Documentation/virt/kvm/api.rst                   |   8 +-
 arch/x86/include/asm/kvm_host.h                  |   1 +
 arch/x86/kvm/Kconfig                             |   4 +-
 arch/x86/kvm/lapic.c                             |   2 +-
 arch/x86/kvm/mmu/mmu.c                           |   7 +-
 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 +-
 tools/testing/selftests/kvm/riscv/get-reg-list.c |   8 +-
 virt/kvm/Kconfig                                 |   4 +-
 virt/kvm/guest_memfd.c                           | 227 ++++++++++++++---------
 virt/kvm/kvm_main.c                              |  73 ++++----
 13 files changed, 214 insertions(+), 159 deletions(-)