mbox series

[v3,00/10] KVM: x86/mmu: Make tdp_mmu read-only and clean up TPD MMU fault handler

Message ID 20220921173546.2674386-1-dmatlack@google.com (mailing list archive)
Headers show
Series KVM: x86/mmu: Make tdp_mmu read-only and clean up TPD MMU fault handler | expand

Message

David Matlack Sept. 21, 2022, 5:35 p.m. UTC 
This series changes the tdp_mmu module parameter to read-only so that
the TDP MMU can be tracked in a global variable instead of per-VM
state. Then it splits out a separate page fault handler for the TDP MMU
and makes some clean ups along the way.

v3:
 - Use __ro_after_init for tdp_mmu_allowed [Kai]
 - Use a macro instead of a const bool for 32-bit [Kai, Sean]
 - Drop unnecessary whitespace change [Isaku]
 - Make kvm_tdp_mmu_page_fault() static [Isaku]

v2: https://lore.kernel.org/kvm/20220826231227.4096391-1-dmatlack@google.com/
 - Make tdp_mmu read-only instead of deleting it entirely [Paolo]
 - Fix 32-bit compilation failures [kernel test robot]

v1: https://lore.kernel.org/kvm/20220815230110.2266741-1-dmatlack@google.com/

Cc: Kai Huang <kai.huang@intel.com>
Cc: Isaku Yamahata <isaku.yamahata@gmail.com>
Cc: Peter Xu <peterx@redhat.com>

David Matlack (10):
  KVM: x86/mmu: Change tdp_mmu to a read-only parameter
  KVM: x86/mmu: Move TDP MMU VM init/uninit behind tdp_mmu_enabled
  KVM: x86/mmu: Grab mmu_invalidate_seq in kvm_faultin_pfn()
  KVM: x86/mmu: Handle error PFNs in kvm_faultin_pfn()
  KVM: x86/mmu: Avoid memslot lookup during KVM_PFN_ERR_HWPOISON
    handling
  KVM: x86/mmu: Handle no-slot faults in kvm_faultin_pfn()
  KVM: x86/mmu: Initialize fault.{gfn,slot} earlier for direct MMUs
  KVM: x86/mmu: Split out TDP MMU page fault handling
  KVM: x86/mmu: Stop needlessly making MMU pages available for TDP MMU
    faults
  KVM: x86/mmu: Rename __direct_map() to direct_map()

 arch/x86/include/asm/kvm_host.h |   9 --
 arch/x86/kvm/mmu.h              |   6 +-
 arch/x86/kvm/mmu/mmu.c          | 237 ++++++++++++++++++++------------
 arch/x86/kvm/mmu/mmu_internal.h |   8 +-
 arch/x86/kvm/mmu/paging_tmpl.h  |  12 +-
 arch/x86/kvm/mmu/tdp_mmu.c      |  11 --
 arch/x86/kvm/mmu/tdp_mmu.h      |   7 +-
 7 files changed, 164 insertions(+), 126 deletions(-)


base-commit: 372d07084593dc7a399bf9bee815711b1fb1bcf2
prerequisite-patch-id: 2e3661ba8856c29b769499bac525b6943d9284b8