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| author | Jinank Jain <jinankjain@linux.microsoft.com> | 2023-01-02 07:12:53 +0000 |
|---|---|---|
| committer | Wei Liu <wei.liu@kernel.org> | 2023-01-17 13:37:19 +0000 |
| commit | f0d2f5c2c000c03aa6b6a29954042174b59a0d1c (patch) | |
| tree | e271a53362519c41a9a2014f202291b7870f42c1 /arch/x86/include/asm/hyperv-tlfs.h | |
| parent | 7fec185a56f45b98d9547982370c2ab33f0f72b5 (diff) | |
| download | linux-f0d2f5c2c000c03aa6b6a29954042174b59a0d1c.tar.gz linux-f0d2f5c2c000c03aa6b6a29954042174b59a0d1c.tar.bz2 linux-f0d2f5c2c000c03aa6b6a29954042174b59a0d1c.zip | |
x86/hyperv: Add an interface to do nested hypercalls
According to TLFS, in order to communicate to L0 hypervisor there needs
to be an additional bit set in the control register. This communication
is required to perform privileged instructions which can only be
performed by L0 hypervisor. An example of that could be setting up the
VMBus infrastructure.
Signed-off-by: Jinank Jain <jinankjain@linux.microsoft.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/24f9d46d5259a688113e6e5e69e21002647f4949.1672639707.git.jinankjain@linux.microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Diffstat (limited to 'arch/x86/include/asm/hyperv-tlfs.h')
| -rw-r--r-- | arch/x86/include/asm/hyperv-tlfs.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/include/asm/hyperv-tlfs.h b/arch/x86/include/asm/hyperv-tlfs.h index 271d081dc251..566ac26239ba 100644 --- a/arch/x86/include/asm/hyperv-tlfs.h +++ b/arch/x86/include/asm/hyperv-tlfs.h @@ -382,7 +382,8 @@ struct hv_nested_enlightenments_control { __u32 reserved:31; } features; struct { - __u32 reserved; + __u32 inter_partition_comm:1; + __u32 reserved:31; } hypercallControls; } __packed; |