linux.git/tools/testing/selftests/kvm/Makefile, branch v6.7

Merge tag 'kvmarm-fixes-6.7-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into kvm-master

2023-12-22T23:03:54+00:00

KVM/arm64 fixes for 6.7, part #2

 - Ensure a vCPU's redistributor is unregistered from the MMIO bus
   if vCPU creation fails

 - Fix building KVM selftests for arm64 from the top-level Makefile

KVM: selftests: Ensure sysreg-defs.h is generated at the expected path

2023-12-12T16:49:43+00:00

Building the KVM selftests from the main selftests Makefile (as opposed
to the kvm subdirectory) doesn't work as OUTPUT is set, forcing the
generated header to spill into the selftests directory. Additionally,
relative paths do not work when building outside of the srctree, as the
canonical selftests path is replaced with 'kselftest' in the output.

Work around both of these issues by explicitly overriding OUTPUT on the
submake cmdline. Move the whole fragment below the point lib.mk gets
included such that $(abs_objdir) is available.

Reviewed-by: Cornelia Huck 
Tested-by: Mark Brown 
Link: https://lore.kernel.org/r/20231212070431.145544-2-oliver.upton@linux.dev
Signed-off-by: Oliver Upton

KVM: selftests: add -MP to CFLAGS

2023-12-08T18:18:50+00:00

Using -MD without -MP causes build failures when a header file is deleted
or moved. With -MP, the compiler will emit phony targets for the header
files it lists as dependencies, and the Makefiles won't refuse to attempt
to rebuild a C unit which no longer includes the deleted header.

Signed-off-by: David Woodhouse 
Link: https://lore.kernel.org/r/9fc8b5395321abbfcaf5d78477a9a7cd350b08e4.camel@infradead.org
Signed-off-by: Sean Christopherson 
Signed-off-by: Paolo Bonzini

perf build: Ensure sysreg-defs Makefile respects output dir

2023-11-22T19:17:53+00:00

Currently the sysreg-defs are written out to the source tree
unconditionally, ignoring the specified output directory. Correct the
build rule to emit the header to the output directory. Opportunistically
reorganize the rules to avoid interleaving with the set of beauty make
rules.

Reported-by: Ian Rogers 
Signed-off-by: Oliver Upton 
Link: https://lore.kernel.org/r/20231121192956.919380-3-oliver.upton@linux.dev
Signed-off-by: Namhyung Kim

Merge tag 'kvmarm-6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD

2023-10-31T20:37:07+00:00

KVM/arm64 updates for 6.7

 - Generalized infrastructure for 'writable' ID registers, effectively
   allowing userspace to opt-out of certain vCPU features for its guest

 - Optimization for vSGI injection, opportunistically compressing MPIDR
   to vCPU mapping into a table

 - Improvements to KVM's PMU emulation, allowing userspace to select
   the number of PMCs available to a VM

 - Guest support for memory operation instructions (FEAT_MOPS)

 - Cleanups to handling feature flags in KVM_ARM_VCPU_INIT, squashing
   bugs and getting rid of useless code

 - Changes to the way the SMCCC filter is constructed, avoiding wasted
   memory allocations when not in use

 - Load the stage-2 MMU context at vcpu_load() for VHE systems, reducing
   the overhead of errata mitigations

 - Miscellaneous kernel and selftest fixes

Merge branch kvm-arm64/pmu_pmcr_n into kvmarm/next

2023-10-30T20:24:19+00:00

* kvm-arm64/pmu_pmcr_n:
  : User-defined PMC limit, courtesy Raghavendra Rao Ananta
  :
  : Certain VMMs may want to reserve some PMCs for host use while running a
  : KVM guest. This was a bit difficult before, as KVM advertised all
  : supported counters to the guest. Userspace can now limit the number of
  : advertised PMCs by writing to PMCR_EL0.N, as KVM's sysreg and PMU
  : emulation enforce the specified limit for handling guest accesses.
  KVM: selftests: aarch64: vPMU test for validating user accesses
  KVM: selftests: aarch64: vPMU register test for unimplemented counters
  KVM: selftests: aarch64: vPMU register test for implemented counters
  KVM: selftests: aarch64: Introduce vpmu_counter_access test
  tools: Import arm_pmuv3.h
  KVM: arm64: PMU: Allow userspace to limit PMCR_EL0.N for the guest
  KVM: arm64: Sanitize PM{C,I}NTEN{SET,CLR}, PMOVS{SET,CLR} before first run
  KVM: arm64: Add {get,set}_user for PM{C,I}NTEN{SET,CLR}, PMOVS{SET,CLR}
  KVM: arm64: PMU: Set PMCR_EL0.N for vCPU based on the associated PMU
  KVM: arm64: PMU: Add a helper to read a vCPU's PMCR_EL0
  KVM: arm64: Select default PMU in KVM_ARM_VCPU_INIT handler
  KVM: arm64: PMU: Introduce helpers to set the guest's PMU

Signed-off-by: Oliver Upton

KVM: selftests: Avoid using forced target for generating arm64 headers

2023-10-30T20:20:39+00:00

The 'prepare' target that generates the arm64 sysreg headers had no
prerequisites, so it wound up forcing a rebuild of all KVM selftests
each invocation. Add a rule for the generated headers and just have
dependents use that for a prerequisite.

Reported-by: Nina Schoetterl-Glausch 
Fixes: 9697d84cc3b6 ("KVM: selftests: Generate sysreg-defs.h and add to include path")
Tested-by: Nina Schoetterl-Glausch 
Link: https://lore.kernel.org/r/20231027005439.3142015-3-oliver.upton@linux.dev
Signed-off-by: Oliver Upton

KVM: selftests: aarch64: Introduce vpmu_counter_access test

2023-10-24T22:59:31+00:00

Introduce vpmu_counter_access test for arm64 platforms.
The test configures PMUv3 for a vCPU, sets PMCR_EL0.N for the vCPU,
and check if the guest can consistently see the same number of the
PMU event counters (PMCR_EL0.N) that userspace sets.
This test case is done with each of the PMCR_EL0.N values from
0 to 31 (With the PMCR_EL0.N values greater than the host value,
the test expects KVM_SET_ONE_REG for the PMCR_EL0 to fail).

Signed-off-by: Reiji Watanabe 
Signed-off-by: Raghavendra Rao Ananta 
Signed-off-by: Marc Zyngier 
Link: https://lore.kernel.org/r/20231020214053.2144305-10-rananta@google.com
Signed-off-by: Oliver Upton

KVM: arm64: selftests: Test for setting ID register from usersapce

2023-10-18T23:37:33+00:00

Add tests to verify setting ID registers from userspace is handled
correctly by KVM. Also add a test case to use ioctl
KVM_ARM_GET_REG_WRITABLE_MASKS to get writable masks.

Signed-off-by: Jing Zhang 
Acked-by: Marc Zyngier 
Link: https://lore.kernel.org/r/20231011195740.3349631-6-oliver.upton@linux.dev
Signed-off-by: Oliver Upton

KVM: selftests: Generate sysreg-defs.h and add to include path

2023-10-18T23:36:25+00:00

Start generating sysreg-defs.h for arm64 builds in anticipation of
updating sysreg.h to a version that depends on it.

Reviewed-by: Mark Brown 
Reviewed-by: Eric Auger 
Tested-by: Eric Auger 
Acked-by: Marc Zyngier 
Link: https://lore.kernel.org/r/20231011195740.3349631-4-oliver.upton@linux.dev
Signed-off-by: Oliver Upton