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 refactors existing UAPI tests from steal_time_init() into
a dedicated check_steal_time_uapi() function for better code organization,
and adds an empty stub for RISC-V.
Patch 3 fills in the RISC-V stub with tests that verify KVM correctly
enforces the STA alignment requirements.
Jiakai Xu (3):
RISC-V: KVM: Validate SBI STA shmem alignment in
kvm_sbi_ext_sta_set_reg()
KVM: selftests: Refactor UAPI tests into dedicated function
RISC-V: KVM: selftests: Add RISC-V SBI STA shmem alignment tests
arch/riscv/kvm/vcpu_sbi_sta.c | 16 +++--
tools/testing/selftests/kvm/steal_time.c | 87 +++++++++++++++++++-----
2 files changed, 82 insertions(+), 21 deletions(-)
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2.34.1
