This is a combination of prep work for TDX and SNP, and a clean up of the
page fault path to (hopefully) make it easier to follow the rules for
private memory, noslot faults, writes to read-only slots, etc.
Paolo, this is the series I mentioned in your TDX/SNP prep work series.
Stating the obvious, these
KVM: x86/mmu: Pass full 64-bit error code when handling page faults
KVM: x86: Move synthetic PFERR_* sanity checks to SVM's #NPF handler
are the drop-in replacements.
Isaku Yamahata (1):
KVM: x86/mmu: Pass full 64-bit error code when handling page faults
Sean Christopherson (15):
KVM: x86/mmu: Exit to userspace with -EFAULT if private fault hits
emulation
KVM: x86: Remove separate "bit" defines for page fault error code
masks
KVM: x86: Define more SEV+ page fault error bits/flags for #NPF
KVM: x86/mmu: Use synthetic page fault error code to indicate private
faults
KVM: x86/mmu: WARN if upper 32 bits of legacy #PF error code are
non-zero
KVM: x86: Move synthetic PFERR_* sanity checks to SVM's #NPF handler
KVM: x86/mmu: WARN and skip MMIO cache on private, reserved page
faults
KVM: x86/mmu: Move private vs. shared check above slot validity checks
KVM: x86/mmu: Don't force emulation of L2 accesses to non-APIC
internal slots
KVM: x86/mmu: Explicitly disallow private accesses to emulated MMIO
KVM: x86/mmu: Move slot checks from __kvm_faultin_pfn() to
kvm_faultin_pfn()
KVM: x86/mmu: Handle no-slot faults at the beginning of
kvm_faultin_pfn()
KVM: x86/mmu: Set kvm_page_fault.hva to KVM_HVA_ERR_BAD for "no slot"
faults
KVM: x86/mmu: Initialize kvm_page_fault's pfn and hva to error values
KVM: x86/mmu: Sanity check that __kvm_faultin_pfn() doesn't create
noslot pfns
arch/x86/include/asm/kvm_host.h | 45 ++++-----
arch/x86/kvm/mmu.h | 4 +-
arch/x86/kvm/mmu/mmu.c | 159 +++++++++++++++++++-------------
arch/x86/kvm/mmu/mmu_internal.h | 24 ++++-
arch/x86/kvm/mmu/mmutrace.h | 2 +-
arch/x86/kvm/svm/svm.c | 9 ++
6 files changed, 151 insertions(+), 92 deletions(-)
base-commit: ec1e3d33557babed2c2c2c7da6e84293c2f56f58
--
2.44.0.278.ge034bb2e1d-goog
