kernel/linux.git/tools/testing/selftests/kvm/lib, branch v6.4.11

Merge tag 'kvm-x86-selftests-6.4' of https://github.com/kvm-x86/linux into HEAD

2023-04-26T19:56:01+00:00

KVM selftests, and an AMX/XCR0 bugfix, for 6.4: - Don't advertise XTILE_CFG in KVM_GET_SUPPORTED_CPUID if XTILE_DATA is not being reported due to userspace not opting in via prctl() - Overhaul the AMX selftests to improve coverage and cleanup the test - Misc cleanups

Merge branch kvm-arm64/smccc-filtering into kvmarm-master/next

2023-04-21T08:44:32+00:00

* kvm-arm64/smccc-filtering: : . : SMCCC call filtering and forwarding to userspace, courtesy of : Oliver Upton. From the cover letter: : : "The Arm SMCCC is rather prescriptive in regards to the allocation of : SMCCC function ID ranges. Many of the hypercall ranges have an : associated specification from Arm (FF-A, PSCI, SDEI, etc.) with some : room for vendor-specific implementations. : : The ever-expanding SMCCC surface leaves a lot of work within KVM for : providing new features. Furthermore, KVM implements its own : vendor-specific ABI, with little room for other implementations (like : Hyper-V, for example). Rather than cramming it all into the kernel we : should provide a way for userspace to handle hypercalls." : . KVM: selftests: Fix spelling mistake "KVM_HYPERCAL_EXIT_SMC" -> "KVM_HYPERCALL_EXIT_SMC" KVM: arm64: Test that SMC64 arch calls are reserved KVM: arm64: Prevent userspace from handling SMC64 arch range KVM: arm64: Expose SMC/HVC width to userspace KVM: selftests: Add test for SMCCC filter KVM: selftests: Add a helper for SMCCC calls with SMC instruction KVM: arm64: Let errors from SMCCC emulation to reach userspace KVM: arm64: Return NOT_SUPPORTED to guest for unknown PSCI version KVM: arm64: Introduce support for userspace SMCCC filtering KVM: arm64: Add support for KVM_EXIT_HYPERCALL KVM: arm64: Use a maple tree to represent the SMCCC filter KVM: arm64: Refactor hvc filtering to support different actions KVM: arm64: Start handling SMCs from EL1 KVM: arm64: Rename SMC/HVC call handler to reflect reality KVM: arm64: Add vm fd device attribute accessors KVM: arm64: Add a helper to check if a VM has ran once KVM: x86: Redefine 'longmode' as a flag for KVM_EXIT_HYPERCALL Signed-off-by: Marc Zyngier

KVM: selftests: Fix spelling mistake "perrmited" -> "permitted"

2023-04-14T17:04:51+00:00

There is a spelling mistake in a test report message. Fix it. Signed-off-by: Colin Ian King Link: https://lore.kernel.org/r/20230414080809.1678603-1-colin.i.king@gmail.com Signed-off-by: Sean Christopherson

KVM: selftests: Rework dynamic XFeature helper to take mask, not bit

2023-04-11T17:19:03+00:00

Take the XFeature mask in __vm_xsave_require_permission() instead of the bit so that there's no need to define macros for both the bit and the mask. Asserting that only a single bit is set and retrieving said bit is easy enough via log2 helpers. Opportunistically clean up the error message for the ARCH_REQ_XCOMP_GUEST_PERM sanity check. Reviewed-by: Aaron Lewis Tested-by: Aaron Lewis Link: https://lore.kernel.org/r/20230405004520.421768-5-seanjc@google.com Signed-off-by: Sean Christopherson

KVM: selftests: Add a helper for SMCCC calls with SMC instruction

2023-04-05T11:07:42+00:00

Build a helper for doing SMCs in selftests by macro-izing the current HVC implementation and taking the conduit instruction as an argument. Signed-off-by: Oliver Upton Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20230404154050.2270077-13-oliver.upton@linux.dev

KVM: selftests: arm64: Fix ttbr0_el1 encoding for PA bits > 48

2023-03-30T18:27:56+00:00

Bits [51:48] of the pgd address are stored at bits [5:2] of ttbr0_el1. page_table_test stores its page tables at the far end of IPA space so was tripping over this when run on a system that supports FEAT_LPA (or FEAT_LPA2). Signed-off-by: Ryan Roberts Reviewed-by: Oliver Upton Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20230308110948.1820163-4-ryan.roberts@arm.com

KVM: selftests: arm64: Fix pte encode/decode for PA bits > 48

2023-03-30T18:27:56+00:00

The high bits [51:48] of a physical address should appear at [15:12] in a 64K pte, not at [51:48] as was previously being programmed. Fix this with new helper functions that do the conversion correctly. This also sets us up nicely for adding LPA2 encodings in future. Fixes: 7a6629ef746d ("kvm: selftests: add virt mem support for aarch64") Signed-off-by: Ryan Roberts Reviewed-by: Oliver Upton Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20230308110948.1820163-3-ryan.roberts@arm.com

KVM: selftests: Add 'malloc' failure check in vcpu_save_state

2023-03-24T21:21:16+00:00

There is a 'malloc' call in vcpu_save_state function, which can be unsuccessful. This patch will add the malloc failure checking to avoid possible null dereference and give more information about test fail reasons. Signed-off-by: Ivan Orlov Link: https://lore.kernel.org/r/20230322144528.704077-1-ivan.orlov0322@gmail.com Signed-off-by: Sean Christopherson

KVM: selftests: Adjust VM's initial stack address to align with SysV ABI spec

2023-03-24T21:20:51+00:00

Align the guest stack to match calling sequence requirements in section "The Stack Frame" of the System V ABI AMD64 Architecture Processor Supplement, which requires the value (%rsp + 8), NOT %rsp, to be a multiple of 16 when control is transferred to the function entry point. I.e. in a normal function call, %rsp needs to be 16-byte aligned _before_ CALL, not after. This fixes unexpected #GPs in guest code when the compiler uses SSE instructions, e.g. to initialize memory, as many SSE instructions require memory operands (including those on the stack) to be 16-byte-aligned. Signed-off-by: Ackerley Tng Link: https://lore.kernel.org/r/20230227180601.104318-1-ackerleytng@google.com Signed-off-by: Sean Christopherson

KVM: selftests: Add a helper to read kvm boolean module parameters

2023-03-24T15:27:04+00:00

Add a helper function for reading kvm boolean module parameters values. No functional change intended. Signed-off-by: Like Xu Link: https://lore.kernel.org/r/20230214084920.59787-2-likexu@tencent.com Signed-off-by: Sean Christopherson