This series follows Sean's suggestions [1][2] to: - Reject vCPU scope KVM_SET_TSC_KHZ ioctl for TSC protected vCPU - Reject VM scope KVM_SET_TSC_KHZ ioctl when vCPUs have been created .. in the discussion of SEV-SNP Secure TSC support series. v1 -> v2: - Protect kvm->create_vcpus check using kvm->lock. - Chao. - Add documentation update to each patch. -Nikunj. - Collect RB (Xiaoyao, Nikunj). - Switched the patch order to make documentation update easier. v1: https://lore.kernel.org/kvm/cover.1752038725.git.kai.huang@xxxxxxxxx/ Hi Xiaoyao, Nikunj, I added your RB anyway, so let me know if you have concern :-) This series has been sanity tested with TDX guests using today's Qemu: - With this series Qemu can still run TDX guests successfully. - With some hack to the Qemu, both VM and vCPU scope KVM_SET_TSC_KHZ ioctls failed as expected. Kai Huang (2): KVM: x86: Reject KVM_SET_TSC_KHZ VM ioctl when vCPUs have been created KVM: x86: Reject KVM_SET_TSC_KHZ vCPU ioctl for TSC protected guest Documentation/virt/kvm/api.rst | 9 ++++++++- arch/x86/kvm/x86.c | 13 ++++++++++--- 2 files changed, 18 insertions(+), 4 deletions(-) base-commit: 6c7ecd725e503bf2ca69ff52c6cc48bb650b1f11 -- 2.50.0
