Re: [PATCH v2] x86/hyperv: Reserve 3 interrupt vectors used exclusively by mshv

[Wei Liu]

On Tue, Feb 17, 2026 at 03:11:58PM -0800, Mukesh R wrote:
> From: Mukesh Rathor <mrathor@xxxxxxxxxxxxxxxxxxx>
> 
> MSVC compiler, used to compile the Microsoft Hyper-V hypervisor currently,
> has an assert intrinsic that uses interrupt vector 0x29 to create an
> exception. This will cause hypervisor to then crash and collect core. As
> such, if this interrupt number is assigned to a device by Linux and the
> device generates it, hypervisor will crash. There are two other such
> vectors hard coded in the hypervisor, 0x2C and 0x2D for debug purposes.
> Fortunately, the three vectors are part of the kernel driver space and
> that makes it feasible to reserve them early so they are not assigned
> later.
> 
> Signed-off-by: Mukesh Rathor <mrathor@xxxxxxxxxxxxxxxxxxx>

Queued. I also did a few cosmetic changes to this patch.

Wei