[PATCH v2 00/10] KVM: MMU changes for confidential computing

From: Paolo Bonzini
Date: Tue Apr 16 2024 - 16:20:27 EST


This includes the MMU parts of "TDX/SNP part 1 of n"[1] while the rest
was posted as "KVM: guest_memfd: New hooks and functionality for SEV-SNP
and TDX"[2] last week.

It includes two basic parts:

- Allow non-zero value for non-present SPTE and removed SPTE, so that
TDX can set the "suppress VE" bit

- Use PFERR_GUEST_ENC_MASK to indicate fault is private.

The changes from the previous posting were suggested by Chao Gao:

- small adjustment to comments

- fix checks for "!pte_access && !shadow_present_mask", rewriting them
as "(pte_access | shadow_present_mask) != SHADOW_NONPRESENT_VALUE".

- move allocation of ve_info outside init_vmcs()

I'll push this series later this week to kvm/next, and rebase kvm-coco-queue
on top.

Paolo

[1] https://patchew.org/linux/20240227232100.478238-1-pbonzini@xxxxxxxxxx/
[2] https://patchew.org/linux/20240404185034.3184582-1-pbonzini@xxxxxxxxxx/

Isaku Yamahata (3):
KVM: x86/mmu: Add Suppress VE bit to EPT
shadow_mmio_mask/shadow_present_mask
KVM: VMX: Introduce test mode related to EPT violation VE
KVM: x86/mmu: Pass around full 64-bit error code for KVM page faults

Paolo Bonzini (3):
KVM, x86: add architectural support code for #VE
KVM: x86/mmu: Use PFERR_GUEST_ENC_MASK to indicate fault is private
KVM: x86/mmu: check for invalid async page faults involving private
memory

Sean Christopherson (4):
KVM: Allow page-sized MMU caches to be initialized with custom 64-bit
values
KVM: x86/mmu: Replace hardcoded value 0 for the initial value for SPTE
KVM: x86/mmu: Allow non-zero value for non-present SPTE and removed
SPTE
KVM: x86/mmu: Track shadow MMIO value on a per-VM basis

arch/x86/include/asm/kvm_host.h | 5 +++
arch/x86/include/asm/vmx.h | 13 ++++++++
arch/x86/kvm/Kconfig | 13 ++++++++
arch/x86/kvm/mmu/mmu.c | 50 ++++++++++++++++++----------
arch/x86/kvm/mmu/mmu_internal.h | 6 ++--
arch/x86/kvm/mmu/mmutrace.h | 2 +-
arch/x86/kvm/mmu/paging_tmpl.h | 16 ++++-----
arch/x86/kvm/mmu/spte.c | 24 ++++++++------
arch/x86/kvm/mmu/spte.h | 24 +++++++++++---
arch/x86/kvm/mmu/tdp_mmu.c | 18 +++++-----
arch/x86/kvm/vmx/vmcs.h | 5 +++
arch/x86/kvm/vmx/vmx.c | 59 ++++++++++++++++++++++++++++++++-
arch/x86/kvm/vmx/vmx.h | 6 +++-
include/linux/kvm_types.h | 1 +
virt/kvm/kvm_main.c | 16 +++++++--
15 files changed, 201 insertions(+), 57 deletions(-)

--
2.43.0