kernel/tools/testing/selftests/kvm/lib/guest_modes.c, branch linux-rolling-stable

KVM: selftests: arm64: Support P52V48 4K and 16K guest_modes

2023-11-27T15:03:50Z

Add support for VM_MODE_P52V48_4K and VM_MODE_P52V48_16K guest modes by using the FEAT_LPA2 pte format for stage1, when FEAT_LPA2 is available. Reviewed-by: Oliver Upton Signed-off-by: Ryan Roberts Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20231127111737.1897081-13-ryan.roberts@arm.com

KVM: selftests: arm64: Determine max ipa size per-page size

2023-11-27T15:03:50Z

We are about to add 52 bit PA guest modes for 4K and 16K pages when the system supports LPA2. In preparation beef up the logic that parses mmfr0 to also tell us what the maximum supported PA size is for each page size. Max PA size = 0 implies the page size is not supported at all. Reviewed-by: Oliver Upton Signed-off-by: Ryan Roberts Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20231127111737.1897081-12-ryan.roberts@arm.com

selftests: KVM: Replace optarg with arg in guest_modes_cmdline

2023-02-08T14:38:47Z

The parameter arg in guest_modes_cmdline not being used now, and the optarg should be replaced with arg in guest_modes_cmdline. And this is the chance to change strtoul() to atoi_non_negative(), since guest mode ID will never be negative. Signed-off-by: Shaoqin Huang Fixes: e42ac777d661 ("KVM: selftests: Factor out guest mode code") Reviewed-by: Andrew Jones Reviewed-by: Vipin Sharma Link: https://lore.kernel.org/r/20230202025716.216323-1-shahuang@redhat.com Signed-off-by: Sean Christopherson

KVM: selftests: Sanity check input to ioctls() at build time

2022-06-11T15:48:09Z

Add a static assert to the KVM/VM/vCPU ioctl() helpers to verify that the size of the argument provided matches the expected size of the IOCTL. Because ioctl() ultimately takes a "void *", it's all too easy to pass in garbage and not detect the error until runtime. E.g. while working on a CPUID rework, selftests happily compiled when vcpu_set_cpuid() unintentionally passed the cpuid() function as the parameter to ioctl() (a local "cpuid" parameter was removed, but its use was not replaced with "vcpu->cpuid" as intended). Tweak a variety of benign issues that aren't compatible with the sanity check, e.g. passing a non-pointer for ioctls(). Note, static_assert() requires a string on older versions of GCC. Feed it an empty string to make the compiler happy. Signed-off-by: Sean Christopherson Signed-off-by: Paolo Bonzini

KVM: selftests: Split get/set device_attr helpers

2022-06-11T15:46:23Z

Split the get/set device_attr helpers instead of using a boolean param to select between get and set. Duplicating upper level wrappers is a very, very small price to pay for improved readability, and having constant (at compile time) inputs will allow the selftests framework to sanity check ioctl() invocations. Signed-off-by: Sean Christopherson Signed-off-by: Paolo Bonzini

KVM: selftests: Use kvm_ioctl() helpers

2022-06-11T14:20:09Z

Use the recently introduced KVM-specific ioctl() helpers instead of open coding calls to ioctl() just to pretty print the ioctl name. Signed-off-by: Sean Christopherson Signed-off-by: Paolo Bonzini

Merge tag 'kvm-riscv-5.17-1' of https://github.com/kvm-riscv/linux into HEAD

2022-01-07T15:43:02Z

KVM/riscv changes for 5.17, take #1 - Use common KVM implementation of MMU memory caches - SBI v0.2 support for Guest - Initial KVM selftests support - Fix to avoid spurious virtual interrupts after clearing hideleg CSR - Update email address for Anup and Atish

KVM: selftests: Add initial support for RISC-V 64-bit

2022-01-06T09:47:50Z

We add initial support for RISC-V 64-bit in KVM selftests using which we can cross-compile and run arch independent tests such as: demand_paging_test dirty_log_test kvm_create_max_vcpus, kvm_page_table_test set_memory_region_test kvm_binary_stats_test All VM guest modes defined in kvm_util.h require at least 48-bit guest virtual address so to use KVM RISC-V selftests hardware need to support at least Sv48 MMU for guest (i.e. VS-mode). Signed-off-by: Anup Patel Reviewed-and-tested-by: Atish Patra

KVM: selftests: arm64: Add support for various modes with 16kB page size

2021-12-28T11:04:20Z

The 16kB page size is not a popular choice, due to only a few CPUs actually implementing support for it. However, it can lead to some interesting performance improvements given the right uarch choices. Add support for this page size for various PA/VA combinations. Signed-off-by: Marc Zyngier Reviewed-by: Andrew Jones Link: https://lore.kernel.org/r/20211227124809.1335409-7-maz@kernel.org

KVM: selftests: arm64: Add support for VM_MODE_P36V48_{4K,64K}

2021-12-28T11:04:20Z

Some of the arm64 systems out there have an IPA space that is positively tiny. Nonetheless, they make great KVM hosts. Add support for 36bit IPA support with 4kB pages, which makes some of the fruity machines happy. Whilst we're at it, add support for 64kB pages as well, though these boxes have no support for it. Reviewed-by: Andrew Jones Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20211227124809.1335409-6-maz@kernel.org