kernel/linux.git/include/hyperv/hvhdk.h, branch v7.0-rc6

mshv: Add SMT_ENABLED_GUEST partition creation flag

2026-02-18T23:54:37+00:00

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 Signed-off-by: Wei Liu

mshv: Add nested virtualization creation flag

2026-02-18T23:53:22+00:00

Introduce HV_PARTITION_CREATION_FLAG_NESTED_VIRTUALIZATION_CAPABLE to indicate support for nested virtualization during partition creation. This enables clearer configuration and capability checks for nested virtualization scenarios. Signed-off-by: Stanislav Kinsburskii Signed-off-by: Muminul Islam Signed-off-by: Wei Liu

mshv: Update hv_stats_page definitions

2026-02-04T06:17:05+00:00

hv_stats_page belongs in hvhdk.h, move it there. It does not require a union to access the data for different counters, just use a single u64 array for simplicity and to match the Windows definitions. While at it, correct the ARM64 value for VpRootDispatchThreadBlocked. Signed-off-by: Nuno Das Neves Acked-by: Stanislav Kinsburskii Reviewed-by: Michael Kelley Signed-off-by: Wei Liu

mshv: add definitions for arm64 gpa intercepts

2026-01-15T07:28:58+00:00

Add definitions required for handling GPA intercepts on arm64. Signed-off-by: Anirudh Rayabharam (Microsoft) Reviewed-by: Stanislav Kinsburskii Signed-off-by: Wei Liu

mshv: adjust interrupt control structure for ARM64

2025-12-05T23:16:49+00:00

Interrupt control structure (union hv_interupt_control) has different fields when it comes to x86 vs ARM64. Bring in the correct structure from HyperV header files and adjust the existing interrupt routing code accordingly. Signed-off-by: Jinank Jain Signed-off-by: Anirudh Rayabharam (Microsoft) Signed-off-by: Wei Liu

mshv: Add the HVCALL_GET_PARTITION_PROPERTY_EX hypercall

2025-11-15T06:18:16+00:00

This hypercall can be used to fetch extended properties of a partition. Extended properties are properties with values larger than a u64. Some of these also need additional input arguments. Add helper function for using the hypercall in the mshv_root driver. Signed-off-by: Purna Pavan Chandra Aekkaladevi Signed-off-by: Nuno Das Neves Reviewed-by: Anirudh Rayabharam Reviewed-by: Praveen K Paladugu Reviewed-by: Easwar Hariharan Reviewed-by: Tianyu Lan Signed-off-by: Wei Liu

hyperv: Add definitions for root partition driver to hv headers

2025-03-20T21:23:04+00:00

A few additional definitions are required for the mshv driver code (to follow). Introduce those here and clean up a little bit while at it. Signed-off-by: Nuno Das Neves Reviewed-by: Roman Kisel Reviewed-by: Stanislav Kinsburskii Reviewed-by: Tianyu Lan Link: https://lore.kernel.org/r/1741980536-3865-10-git-send-email-nunodasneves@linux.microsoft.com Signed-off-by: Wei Liu Message-ID: <1741980536-3865-10-git-send-email-nunodasneves@linux.microsoft.com>

hyperv: Add new Hyper-V headers in include/hyperv

2025-01-10T00:54:20+00:00

These headers contain definitions for regular Hyper-V guests (as in hyperv-tlfs.h), as well as interfaces for more privileged guests like the root partition (aka Dom0). These files are derived from headers exported from Hyper-V, rather than being derived from the TLFS document. (Although, to preserve compatibility with existing Linux code, some definitions are copied directly from hyperv-tlfs.h too). The new files follow a naming convention according to their original use: - hdk "host development kit" - gdk "guest development kit" With postfix "_mini" implying userspace-only headers, and "_ext" for extended hypercalls. The use of multiple files and their original names is primarily to keep the provenance of exactly where they came from in Hyper-V code, which is helpful for manual maintenance and extension of these definitions. Microsoft maintainers importing new definitions should take care to put them in the right file. However, Linux kernel code that uses any of the definitions need not be aware of the multiple files or assign any meaning to the new names. Linux kernel code should always just include hvhdk.h Note the new headers contain both arm64 and x86_64 definitions. Some are guarded by #ifdefs, and some are instead prefixed with the architecture, e.g. hv_x64_*. These conventions are kept from Hyper-V code as another tactic to simplify the process of importing and maintaining the definitions, rather than splitting them up into their own files in arch/x86/ and arch/arm64/. These headers are a step toward importing headers directly from Hyper-V in the future, similar to Xen public files in include/xen/interface/. Signed-off-by: Nuno Das Neves Reviewed-by: Easwar Hariharan Reviewed-by: Michael Kelley Signed-off-by: Roman Kisel Link: https://lore.kernel.org/r/1732577084-2122-4-git-send-email-nunodasneves@linux.microsoft.com Link: https://lore.kernel.org/r/20250108222138.1623703-2-romank@linux.microsoft.com Signed-off-by: Wei Liu