On 10/31/2025 11:37 AM, Easwar Hariharan wrote: > On 10/30/2025 2:40 PM, Nuno Das Neves wrote: >> From: Muminul Islam <[email protected]> >> >> The existing mshv create partition ioctl does not provide a way to >> specify which cpu features are enabled in the guest. This was done >> to reduce unnecessary complexity in the API. >> >> However, some new scenarios require fine-grained control over the >> cpu feature bits. >> >> Define a new mshv_create_partition_v2 structure which supports passing >> through the disabled cpu flags and xsave flags to the hypervisor >> directly. >> >> When these are not specified (pt_num_cpu_fbanks == 0) or the old >> structure is used, define a set of default flags which cover most >> cases. >> >> Retain backward compatibility with the old structure via a new flag >> MSHV_PT_BIT_CPU_AND_XSAVE_FEATURES which enables the new struct. >> >> Co-developed-by: Jinank Jain <[email protected]> >> Signed-off-by: Jinank Jain <[email protected]> >> Signed-off-by: Muminul Islam <[email protected]> >> Signed-off-by: Nuno Das Neves <[email protected]> >> --- >> Changes in v2: >> - Fix compilation issues [kernel test robot] >> >> --- >> drivers/hv/mshv_root_main.c | 176 ++++++++++++++++++++++++++++++++---- >> include/hyperv/hvhdk.h | 86 +++++++++++++++++- >> include/uapi/linux/mshv.h | 34 +++++++ >> 3 files changed, 272 insertions(+), 24 deletions(-) > > lkp also pointed out that we are leaking a kernel config to userspace: > https://lore.kernel.org/all/[email protected]/ > > In the v3 that Wei requested, please address that as well.
Thanks, I did fix this issue in v2 but I didn't mention it explicitly. I'll update the changelog in v3 to call it out. > > Thanks, > Easwar (he/him) > > <snip>
