This series fixes a missing validation in the RISC-V KVM SBI
steal-time accounting (STA) register handling.
Patch 1 validates the configured SBI STA shared memory GPA at
KVM_SET_ONE_REG, enforcing the 64-byte alignment requirement
defined by the SBI specification or allowing INVALID_GPA to explicitly
disable steal-time accounting. This prevents invalid userspace state
from reaching runtime code paths and avoids WARN_ON() triggers during
KVM_RUN.
Patch 2 adds RISC-V KVM selftests to verify the expected behavior,
ensuring that misaligned GPAs are rejected, aligned GPAs are accepted,
and INVALID_GPA correctly disables steal-time accounting.
Jiakai Xu (2):
RISC-V: KVM: Validate SBI STA shmem alignment in
kvm_sbi_ext_sta_set_reg()
RISC-V: KVM: selftests: Add RISC-V SBI STA shmem alignment tests
arch/riscv/kvm/vcpu_sbi_sta.c | 16 ++++++---
.../selftests/kvm/include/riscv/processor.h | 4 +++
tools/testing/selftests/kvm/steal_time.c | 33 +++++++++++++++++++
3 files changed, 48 insertions(+), 5 deletions(-)
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2.34.1
