linux-stable.git/tools/testing/selftests/kvm/lib, branch linux-6.16.y Linux kernel stable tree Merge tag 'kvm-x86-selftests-6.16' of https://github.com/kvm-x86/linux into HEAD 2025-05-27T16:15:26+00:00 Paolo Bonzini pbonzini@redhat.com 2025-05-27T16:15:26+00:00 3e0797f6dd78178758ea33c3e82fc079079cf772 KVM selftests changes for 6.16: - Add support for SNP to the various SEV selftests. - Add a selftest to verify fastops instructions via forced emulation. - Add MGLRU support to the access tracking perf test. 
KVM selftests changes for 6.16:

 - Add support for SNP to the various SEV selftests.

 - Add a selftest to verify fastops instructions via forced emulation.

 - Add MGLRU support to the access tracking perf test.
Merge tag 'kvm-riscv-6.16-1' of https://github.com/kvm-riscv/linux into HEAD 2025-05-26T20:27:00+00:00 Paolo Bonzini pbonzini@redhat.com 2025-05-26T20:27:00+00:00 1f7c9d52b12ded6c99b5623d1e81bba7bb76c2f4 KVM/riscv changes for 6.16 - Add vector registers to get-reg-list selftest - VCPU reset related improvements - Remove scounteren initialization from VCPU reset - Support VCPU reset from userspace using set_mpstate() ioctl 
KVM/riscv changes for 6.16

- Add vector registers to get-reg-list selftest
- VCPU reset related improvements
- Remove scounteren initialization from VCPU reset
- Support VCPU reset from userspace using set_mpstate() ioctl
KVM: riscv: selftests: Align the trap information wiht pt_regs 2025-05-21T04:04:35+00:00 Atish Patra atishp@rivosinc.com 2025-04-30T08:16:28+00:00 e23bb06b17f81982450beb880b9c5a7fb4251164 The current exeception register structure in selftests are missing few registers (e.g stval). Instead of adding it manually, change the ex_regs to align with pt_regs to make it future proof. Suggested-by: Andrew Jones <ajones@ventanamicro.com> Reviewed-by: Andrew Jones <ajones@ventanamicro.com> Signed-off-by: Atish Patra <atishp@rivosinc.com> Link: https://lore.kernel.org/r/20250430-kvm_selftest_improve-v3-1-eea270ff080b@rivosinc.com Signed-off-by: Anup Patel <anup@brainfault.org> 
The current exeception register structure in selftests are missing
few registers (e.g stval). Instead of adding it manually, change
the ex_regs to align with pt_regs to make it future proof.

Suggested-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Signed-off-by: Atish Patra <atishp@rivosinc.com>
Link: https://lore.kernel.org/r/20250430-kvm_selftest_improve-v3-1-eea270ff080b@rivosinc.com
Signed-off-by: Anup Patel <anup@brainfault.org>
KVM: selftests: Add ucall test support for LoongArch 2025-05-20T12:20:26+00:00 Bibo Mao maobibo@loongson.cn 2025-05-20T12:20:26+00:00 304b93b1a044de4050651e6bcb931581f9e0386f Add ucall test support for LoongArch, ucall method on LoongArch uses undefined mmio area. It will cause vCPU exiting to hypervisor so that hypervisor can communicate with vCPU. Signed-off-by: Bibo Mao <maobibo@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn> 
Add ucall test support for LoongArch, ucall method on LoongArch uses
undefined mmio area. It will cause vCPU exiting to hypervisor so that
hypervisor can communicate with vCPU.

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
KVM: selftests: Add core KVM selftests support for LoongArch 2025-05-20T12:20:26+00:00 Bibo Mao maobibo@loongson.cn 2025-05-20T12:20:26+00:00 2ebf31d59f583449422f4b2dad59b0130e750117 Add core KVM selftests support for LoongArch, it includes exception handler, mmu page table setup and vCPU startup entry support. Signed-off-by: Bibo Mao <maobibo@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn> 
Add core KVM selftests support for LoongArch, it includes exception
handler, mmu page table setup and vCPU startup entry support.

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
KVM: selftests: Add VM_MODE_P47V47_16K VM mode 2025-05-20T12:20:23+00:00 Bibo Mao maobibo@loongson.cn 2025-05-20T12:20:23+00:00 a5460d191915e420c1c2bd52c6963d416eb9172a On LoongArch system, 16K page is used in general and GVA width is 47 bit while GPA width is 47 bit also, here add new VM mode VM_MODE_P47V47_16K. Signed-off-by: Bibo Mao <maobibo@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn> 
On LoongArch system, 16K page is used in general and GVA width is 47 bit
while GPA width is 47 bit also, here add new VM mode VM_MODE_P47V47_16K.

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
KVM: selftests: access_tracking_perf_test: Use MGLRU for access tracking 2025-05-16T19:58:21+00:00 James Houghton jthoughton@google.com 2025-05-08T18:46:48+00:00 d166453ebd2925edde24872d9b8ac60065eb0618 Use MGLRU's debugfs interface to do access tracking instead of page_idle. The logic to use the page_idle bitmap is left in, as it is useful for kernels that do not have MGLRU built in. When MGLRU is enabled, page_idle will report pages as still idle even after being accessed, as MGLRU doesn't necessarily clear the Idle folio flag when accessing an idle page, so the test will not attempt to use page_idle if MGLRU is enabled but otherwise not usable. Aging pages with MGLRU is much faster than marking pages as idle with page_idle. Co-developed-by: Axel Rasmussen <axelrasmussen@google.com> Signed-off-by: Axel Rasmussen <axelrasmussen@google.com> Signed-off-by: James Houghton <jthoughton@google.com> Link: https://lore.kernel.org/r/20250508184649.2576210-8-jthoughton@google.com [sean: print parsed features, not raw string] Signed-off-by: Sean Christopherson <seanjc@google.com> 
Use MGLRU's debugfs interface to do access tracking instead of
page_idle. The logic to use the page_idle bitmap is left in, as it is
useful for kernels that do not have MGLRU built in.

When MGLRU is enabled, page_idle will report pages as still idle even
after being accessed, as MGLRU doesn't necessarily clear the Idle folio
flag when accessing an idle page, so the test will not attempt to use
page_idle if MGLRU is enabled but otherwise not usable.

Aging pages with MGLRU is much faster than marking pages as idle with
page_idle.

Co-developed-by: Axel Rasmussen <axelrasmussen@google.com>
Signed-off-by: Axel Rasmussen <axelrasmussen@google.com>
Signed-off-by: James Houghton <jthoughton@google.com>
Link: https://lore.kernel.org/r/20250508184649.2576210-8-jthoughton@google.com
[sean: print parsed features, not raw string]
Signed-off-by: Sean Christopherson <seanjc@google.com>
KVM: selftests: access_tracking_perf_test: Add option to skip the sanity check 2025-05-16T18:45:12+00:00 Maxim Levitsky mlevitsk@redhat.com 2025-05-08T18:46:43+00:00 26dcdfa01c33b4b52fd8bd3798dc221a9de7529c Add an option to skip sanity check of number of still idle pages, and set it by default to skip, in case hypervisor or NUMA balancing is detected. Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com> Co-developed-by: James Houghton <jthoughton@google.com> Signed-off-by: James Houghton <jthoughton@google.com> Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com> Link: https://lore.kernel.org/r/20250508184649.2576210-3-jthoughton@google.com Signed-off-by: Sean Christopherson <seanjc@google.com> 
Add an option to skip sanity check of number of still idle pages,
and set it by default to skip, in case hypervisor or NUMA balancing
is detected.

Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Co-developed-by: James Houghton <jthoughton@google.com>
Signed-off-by: James Houghton <jthoughton@google.com>
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Link: https://lore.kernel.org/r/20250508184649.2576210-3-jthoughton@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
KVM: selftests: Extract guts of THP accessor to standalone sysfs helpers 2025-05-16T16:35:26+00:00 Sean Christopherson seanjc@google.com 2025-05-08T18:46:42+00:00 d761c14d902e41c1e4c9b57f0e57593b7dfc56a9 Extract the guts of thp_configured() and get_trans_hugepagesz() to standalone helpers so that the core logic can be reused for other sysfs files, e.g. to query numa_balancing. Opportunistically assert that the initial fscanf() read at least one byte, and add a comment explaining the second call to fscanf(). Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com> Signed-off-by: James Houghton <jthoughton@google.com> Link: https://lore.kernel.org/r/20250508184649.2576210-2-jthoughton@google.com Signed-off-by: Sean Christopherson <seanjc@google.com> 
Extract the guts of thp_configured() and get_trans_hugepagesz() to
standalone helpers so that the core logic can be reused for other sysfs
files, e.g. to query numa_balancing.

Opportunistically assert that the initial fscanf() read at least one byte,
and add a comment explaining the second call to fscanf().

Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: James Houghton <jthoughton@google.com>
Link: https://lore.kernel.org/r/20250508184649.2576210-2-jthoughton@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
KVM: selftests: Force GUEST_MEMFD flag for SNP VM type 2025-05-02T20:05:30+00:00 Pratik R. Sampat prsampat@amd.com 2025-03-05T22:59:58+00:00 b73a30cd9caa196459ef66099662b3e5feb8571f Force the SEV-SNP VM type to set the KVM_MEM_GUEST_MEMFD flag for the creation of private memslots. Signed-off-by: Pratik R. Sampat <prsampat@amd.com> Link: https://lore.kernel.org/r/20250305230000.231025-9-prsampat@amd.com [sean: add a comment, don't break non-x86] Signed-off-by: Sean Christopherson <seanjc@google.com> 
Force the SEV-SNP VM type to set the KVM_MEM_GUEST_MEMFD flag for the
creation of private memslots.

Signed-off-by: Pratik R. Sampat <prsampat@amd.com>
Link: https://lore.kernel.org/r/20250305230000.231025-9-prsampat@amd.com
[sean: add a comment, don't break non-x86]
Signed-off-by: Sean Christopherson <seanjc@google.com>