linux.git/tools/testing/selftests/kvm/Makefile, branch v6.10

KVM: s390x: selftests: Add shared zeropage test

2024-06-05T15:03:24+00:00

Let's test that we can have shared zeropages in our process as long as
storage keys are not getting used, that shared zeropages are properly
unshared (replaced by anonymous pages) once storage keys are enabled,
and that no new shared zeropages are populated after storage keys
were enabled.

We require the new pagemap interface to detect the shared zeropage.

On an old kernel (zeropages always disabled):
	# ./s390x/shared_zeropage_test
	TAP version 13
	1..3
	not ok 1 Shared zeropages should be enabled
	ok 2 Shared zeropage should be gone
	ok 3 Shared zeropages should be disabled
	# Totals: pass:2 fail:1 xfail:0 xpass:0 skip:0 error:0

On a fixed kernel:
	# ./s390x/shared_zeropage_test
	TAP version 13
	1..3
	ok 1 Shared zeropages should be enabled
	ok 2 Shared zeropage should be gone
	ok 3 Shared zeropages should be disabled
	# Totals: pass:3 fail:0 xfail:0 xpass:0 skip:0 error:0

Testing of UFFDIO_ZEROPAGE can be added later.

[ agordeev: Fixed checkpatch complaint, added ucall_common.h include ]

Cc: Christian Borntraeger 
Cc: Janosch Frank 
Cc: Claudio Imbrenda 
Cc: Thomas Huth 
Cc: Alexander Gordeev 
Cc: Paolo Bonzini 
Cc: Shuah Khan 
Signed-off-by: David Hildenbrand 
Acked-by: Christian Borntraeger 
Acked-by: Muhammad Usama Anjum 
Tested-by: Alexander Gordeev 
Link: https://lore.kernel.org/r/20240412084329.30315-1-david@redhat.com
Signed-off-by: Alexander Gordeev

Merge tag 'kvm-x86-selftests_utils-6.10' of https://github.com/kvm-x86/linux into HEAD

2024-05-12T07:18:11+00:00

KVM selftests treewide updates for 6.10:

 - Define _GNU_SOURCE for all selftests to fix a warning that was introduced by
   a change to kselftest_harness.h late in the 6.9 cycle, and because forcing
   every test to #define _GNU_SOURCE is painful.

 - Provide a global psuedo-RNG instance for all tests, so that library code can
   generate random, but determinstic numbers.

 - Use the global pRNG to randomly force emulation of select writes from guest
   code on x86, e.g. to help validate KVM's emulation of locked accesses.

 - Rename kvm_util_base.h back to kvm_util.h, as the weird layer of indirection
   was added purely to avoid manually #including ucall_common.h in a handful of
   locations.

 - Allocate and initialize x86's GDT, IDT, TSS, segments, and default exception
   handlers at VM creation, instead of forcing tests to manually trigger the
   related setup.

Merge tag 'kvmarm-6.10-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD

2024-05-12T07:15:53+00:00

KVM/arm64 updates for Linux 6.10

- Move a lot of state that was previously stored on a per vcpu
  basis into a per-CPU area, because it is only pertinent to the
  host while the vcpu is loaded. This results in better state
  tracking, and a smaller vcpu structure.

- Add full handling of the ERET/ERETAA/ERETAB instructions in
  nested virtualisation. The last two instructions also require
  emulating part of the pointer authentication extension.
  As a result, the trap handling of pointer authentication has
  been greattly simplified.

- Turn the global (and not very scalable) LPI translation cache
  into a per-ITS, scalable cache, making non directly injected
  LPIs much cheaper to make visible to the vcpu.

- A batch of pKVM patches, mostly fixes and cleanups, as the
  upstreaming process seems to be resuming. Fingers crossed!

- Allocate PPIs and SGIs outside of the vcpu structure, allowing
  for smaller EL2 mapping and some flexibility in implementing
  more or less than 32 private IRQs.

- Purge stale mpidr_data if a vcpu is created after the MPIDR
  map has been created.

- Preserve vcpu-specific ID registers across a vcpu reset.

- Various minor cleanups and improvements.

Merge tag 'kvm-riscv-6.10-1' of https://github.com/kvm-riscv/linux into HEAD

2024-05-07T17:03:03+00:00

 KVM/riscv changes for 6.10

- Support guest breakpoints using ebreak
- Introduce per-VCPU mp_state_lock and reset_cntx_lock
- Virtualize SBI PMU snapshot and counter overflow interrupts
- New selftests for SBI PMU and Guest ebreak

KVM: selftests: Define _GNU_SOURCE for all selftests code

2024-04-29T19:49:10+00:00

Define _GNU_SOURCE is the base CFLAGS instead of relying on selftests to
manually #define _GNU_SOURCE, which is repetitive and error prone.  E.g.
kselftest_harness.h requires _GNU_SOURCE for asprintf(), but if a selftest
includes kvm_test_harness.h after stdio.h, the include guards result in
the effective version of stdio.h consumed by kvm_test_harness.h not
defining asprintf():

  In file included from x86_64/fix_hypercall_test.c:12:
  In file included from include/kvm_test_harness.h:11:
 ../kselftest_harness.h:1169:2: error: call to undeclared function
  'asprintf'; ISO C99 and later do not support implicit function declarations
  [-Wimplicit-function-declaration]
   1169 |         asprintf(&test_name, "%s%s%s.%s", f->name,
        |         ^

When including the rseq selftest's "library" code, #undef _GNU_SOURCE so
that rseq.c controls whether or not it wants to build with _GNU_SOURCE.

Reported-by: Muhammad Usama Anjum 
Acked-by: Claudio Imbrenda 
Acked-by: Oliver Upton 
Acked-by: Anup Patel 
Reviewed-by: Muhammad Usama Anjum 
Link: https://lore.kernel.org/r/20240423190308.2883084-1-seanjc@google.com
Signed-off-by: Sean Christopherson

KVM: riscv: selftests: Add SBI PMU selftest

2024-04-26T07:44:06+00:00

This test implements basic sanity test and cycle/instret event
counting tests.

Reviewed-by: Anup Patel 
Reviewed-by: Andrew Jones 
Signed-off-by: Atish Patra 
Link: https://lore.kernel.org/r/20240420151741.962500-22-atishp@rivosinc.com
Signed-off-by: Anup Patel

KVM: selftests: Add stress test for LPI injection

2024-04-25T12:19:56+00:00

Now that all the infrastructure is in place, add a test to stress KVM's
LPI injection. Keep a 1:1 mapping of device IDs to signalling threads,
allowing the user to scale up/down the sender side of an LPI. Make use
of the new VM stats for the translation cache to estimate the
translation hit rate.

Since the primary focus of the test is on performance, you'll notice
that the guest code is not pedantic about the LPIs it receives. Counting
the number of LPIs would require synchronization between the device and
vCPU threads to avoid coalescing and would get in the way of performance
numbers.

Signed-off-by: Oliver Upton 
Link: https://lore.kernel.org/r/20240422200158.2606761-20-oliver.upton@linux.dev
Signed-off-by: Marc Zyngier

KVM: selftests: Add a minimal library for interacting with an ITS

2024-04-25T12:19:56+00:00

A prerequisite of testing LPI injection performance is of course
instantiating an ITS for the guest. Add a small library for creating an
ITS and interacting with it from the guest.

Signed-off-by: Oliver Upton 
Link: https://lore.kernel.org/r/20240422200158.2606761-17-oliver.upton@linux.dev
Signed-off-by: Marc Zyngier

selftests: kvm: add tests for KVM_SEV_INIT2

2024-04-11T17:08:26+00:00

Signed-off-by: Paolo Bonzini 
Message-ID: <20240404121327.3107131-15-pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini

RISC-V: KVM: selftests: Add ebreak test support

2024-04-08T08:36:27+00:00

Initial support for RISC-V KVM ebreak test. Check the exit reason and
the PC when guest debug is enabled. Also to make sure the guest could
handle the ebreak exception without exiting to the VMM when guest debug
is not enabled.

Signed-off-by: Chao Du 
Reviewed-by: Andrew Jones 
Link: https://lore.kernel.org/r/20240402062628.5425-4-duchao@eswincomputing.com
Signed-off-by: Anup Patel