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| author | Anatol Belski <anbelski@linux.microsoft.com> | 2026-02-18 14:48:02 +0000 |
|---|---|---|
| committer | Wei Liu <wei.liu@kernel.org> | 2026-02-18 23:54:37 +0000 |
| commit | 8927a108a7662eb83eb667bc0c5a0633397122b1 (patch) | |
| tree | 27a9929b2f51114737e34b6bfc5903ce3d46b720 /drivers | |
| parent | a284dbc96a47891a7a595a1c81b1e2da4d309cf6 (diff) | |
| download | lwn-8927a108a7662eb83eb667bc0c5a0633397122b1.tar.gz lwn-8927a108a7662eb83eb667bc0c5a0633397122b1.zip | |
mshv: Add SMT_ENABLED_GUEST partition creation flag
Add support for HV_PARTITION_CREATION_FLAG_SMT_ENABLED_GUEST
to allow userspace VMMs to enable SMT for guest partitions.
Expose this via new MSHV_PT_BIT_SMT_ENABLED_GUEST flag in the UAPI.
Without this flag, the hypervisor schedules guest VPs incorrectly,
causing SMT unusable.
Signed-off-by: Anatol Belski <anbelski@linux.microsoft.com>
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/hv/mshv_root_main.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/hv/mshv_root_main.c b/drivers/hv/mshv_root_main.c index e490f8e5a8a5..192467a25f66 100644 --- a/drivers/hv/mshv_root_main.c +++ b/drivers/hv/mshv_root_main.c @@ -1949,6 +1949,8 @@ static long mshv_ioctl_process_pt_flags(void __user *user_arg, u64 *pt_flags, *pt_flags |= HV_PARTITION_CREATION_FLAG_GPA_SUPER_PAGES_ENABLED; if (args.pt_flags & BIT(MSHV_PT_BIT_NESTED_VIRTUALIZATION)) *pt_flags |= HV_PARTITION_CREATION_FLAG_NESTED_VIRTUALIZATION_CAPABLE; + if (args.pt_flags & BIT(MSHV_PT_BIT_SMT_ENABLED_GUEST)) + *pt_flags |= HV_PARTITION_CREATION_FLAG_SMT_ENABLED_GUEST; isol_props->as_uint64 = 0; |