On Sat, Feb 28, 2026 at 12:53:55AM +0000, Jiakai Xu wrote: > Add RISC-V KVM selftests to verify the SBI Steal-Time Accounting (STA) > shared memory alignment requirements. > > The SBI specification requires the STA shared memory GPA to be 64-byte > aligned, or set to all-ones to explicitly disable steal-time accounting. > This test verifies that KVM enforces the expected behavior when > configuring the SBI STA shared memory via KVM_SET_ONE_REG. > > Specifically, the test checks that: > - misaligned GPAs are rejected with -EINVAL > - 64-byte aligned GPAs are accepted > - all-ones GPA is accepted > > Signed-off-by: Jiakai Xu <[email protected]> > Signed-off-by: Jiakai Xu <[email protected]> > --- > V8 -> V9: Dropped __riscv guard around INVALID_GPA, which is common to > all architectures. > V7 -> V8: Moved INVALID_GPA definition to kvm_util_types.h. > Removed comments in RISC-V check_steal_time_uapi(). > Corrected reg.id assignment for SBI STA. > V6 -> V7: Removed RISCV_SBI_STA_REG() macro addition and used existing > KVM_REG_RISCV_SBI_STA_REG(shmem_lo) instead. > Refined assertion messages per review feedback. > Split into two patches per Andrew Jones' suggestion: > Refactored UAPI tests from steal_time_init() into dedicated > check_steal_time_uapi() function and added empty stub for > RISC-V. > Filled in RISC-V stub with STA alignment tests. (this patch) > --- > .../selftests/kvm/include/kvm_util_types.h | 2 ++ > tools/testing/selftests/kvm/steal_time.c | 31 +++++++++++++++++++ > 2 files changed, 33 insertions(+) >
Reviewed-by: Andrew Jones <[email protected]>
