linux.git/arch/mips/kvm, branch v5.13

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

2021-05-01T17:14:08+00:00

Pull kvm updates from Paolo Bonzini:
 "This is a large update by KVM standards, including AMD PSP (Platform
  Security Processor, aka "AMD Secure Technology") and ARM CoreSight
  (debug and trace) changes.

  ARM:

   - CoreSight: Add support for ETE and TRBE

   - Stage-2 isolation for the host kernel when running in protected
     mode

   - Guest SVE support when running in nVHE mode

   - Force W^X hypervisor mappings in nVHE mode

   - ITS save/restore for guests using direct injection with GICv4.1

   - nVHE panics now produce readable backtraces

   - Guest support for PTP using the ptp_kvm driver

   - Performance improvements in the S2 fault handler

  x86:

   - AMD PSP driver changes

   - Optimizations and cleanup of nested SVM code

   - AMD: Support for virtual SPEC_CTRL

   - Optimizations of the new MMU code: fast invalidation, zap under
     read lock, enable/disably dirty page logging under read lock

   - /dev/kvm API for AMD SEV live migration (guest API coming soon)

   - support SEV virtual machines sharing the same encryption context

   - support SGX in virtual machines

   - add a few more statistics

   - improved directed yield heuristics

   - Lots and lots of cleanups

  Generic:

   - Rework of MMU notifier interface, simplifying and optimizing the
     architecture-specific code

   - a handful of "Get rid of oprofile leftovers" patches

   - Some selftests improvements"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (379 commits)
  KVM: selftests: Speed up set_memory_region_test
  selftests: kvm: Fix the check of return value
  KVM: x86: Take advantage of kvm_arch_dy_has_pending_interrupt()
  KVM: SVM: Skip SEV cache flush if no ASIDs have been used
  KVM: SVM: Remove an unnecessary prototype declaration of sev_flush_asids()
  KVM: SVM: Drop redundant svm_sev_enabled() helper
  KVM: SVM: Move SEV VMCB tracking allocation to sev.c
  KVM: SVM: Explicitly check max SEV ASID during sev_hardware_setup()
  KVM: SVM: Unconditionally invoke sev_hardware_teardown()
  KVM: SVM: Enable SEV/SEV-ES functionality by default (when supported)
  KVM: SVM: Condition sev_enabled and sev_es_enabled on CONFIG_KVM_AMD_SEV=y
  KVM: SVM: Append "_enabled" to module-scoped SEV/SEV-ES control variables
  KVM: SEV: Mask CPUID[0x8000001F].eax according to supported features
  KVM: SVM: Move SEV module params/variables to sev.c
  KVM: SVM: Disable SEV/SEV-ES if NPT is disabled
  KVM: SVM: Free sev_asid_bitmap during init if SEV setup fails
  KVM: SVM: Zero out the VMCB array used to track SEV ASID association
  x86/sev: Drop redundant and potentially misleading 'sev_enabled'
  KVM: x86: Move reverse CPUID helpers to separate header file
  KVM: x86: Rename GPR accessors to make mode-aware variants the defaults
  ...

KVM: MIPS/MMU: Convert to the gfn-based MMU notifier callbacks

2021-04-17T12:31:07+00:00

Move MIPS to the gfn-based MMU notifier APIs, which do the hva->gfn
lookup in common code, and whose code is nearly identical to MIPS'
lookup.

No meaningful functional change intended, though the exact order of
operations is slightly different since the memslot lookups occur before
calling into arch code.

Signed-off-by: Sean Christopherson 
Message-Id: <20210402005658.3024832-5-seanjc@google.com>
Signed-off-by: Paolo Bonzini

KVM: MIPS: defer flush to generic MMU notifier code

2021-04-17T12:31:05+00:00

Return 1 from kvm_unmap_hva_range and kvm_set_spte_hva if a flush is
needed, so that the generic code can coalesce the flushes.

Signed-off-by: Paolo Bonzini

KVM: MIPS: let generic code call prepare_flush_shadow

2021-04-17T12:31:05+00:00

Since all calls to kvm_flush_remote_tlbs must be preceded by
kvm_mips_callbacks->prepare_flush_shadow, repurpose
kvm_arch_flush_remote_tlb to invoke it.  This makes it possible
to use the TLB flushing mechanism provided by the generic MMU
notifier code.

Signed-off-by: Paolo Bonzini

KVM: MIPS: rework flush_shadow_* callbacks into one that prepares the flush

2021-04-17T12:31:05+00:00

Both trap-and-emulate and VZ have a single implementation that covers
both .flush_shadow_all and .flush_shadow_memslot, and both of them end
with a call to kvm_flush_remote_tlbs.

Unify the callbacks into one and extract the call to kvm_flush_remote_tlbs.
The next patches will pull it further out of the the architecture-specific
MMU notifier functions kvm_unmap_hva_range and kvm_set_spte_hva.

Signed-off-by: Paolo Bonzini

KVM: constify kvm_arch_flush_remote_tlbs_memslot

2021-04-17T12:31:04+00:00

memslots are stored in RCU and there should be no need to
change them.

Signed-off-by: Paolo Bonzini

MIPS: Remove KVM_TE support

2021-03-10T14:18:48+00:00

After removal of the guest part of KVM TE (trap and emulate), also remove
the host part.

Signed-off-by: Thomas Bogendoerfer

KVM: MIPS: remove unneeded semicolon

2021-02-03T10:33:16+00:00

Eliminate the following coccicheck warning:
./arch/mips/kvm/mips.c:151:2-3: Unneeded semicolon

Reported-by: Abaci Robot 
Signed-off-by: Yang Li 
Reviewed-by: Huacai Chen 
Signed-off-by: Thomas Bogendoerfer

MIPS: kvm: Use vm_get_page_prot to get protection bits

2020-11-19T12:26:53+00:00

MIPS protection bits are setup during runtime so using defines like
PAGE_SHARED ignores this runtime changes. Using vm_get_page_prot
to get correct page protection fixes this.

Signed-off-by: Thomas Bogendoerfer

KVM: MIPS: clean up redundant kvm_run parameters in assembly

2020-09-28T11:57:21+00:00

In the current kvm version, 'kvm_run' has been included in the 'kvm_vcpu'
structure. For historical reasons, many kvm-related function parameters
retain the 'kvm_run' and 'kvm_vcpu' parameters at the same time. This
patch does a unified cleanup of these remaining redundant parameters.

Signed-off-by: Tianjia Zhang 
Reviewed-by: Huacai Chen 
Tested-by: Jiaxun Yang 
Message-Id: <20200623131418.31473-6-tianjia.zhang@linux.alibaba.com>
Signed-off-by: Paolo Bonzini