linux-kernel - Re: [PATCH v2] x86/Hyper-V: Expand definition of struct hv_vp_assist

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Date:   Fri, 11 Nov 2022 23:39:31 +0000
From:   Wei Liu <wei.liu@...nel.org>
To:     Anirudh Rayabharam <anrayabh@...ux.microsoft.com>
Cc:     Saurabh Sengar <ssengar@...ux.microsoft.com>,
        ssengar@...rosoft.com, kys@...rosoft.com, haiyangz@...rosoft.com,
        wei.liu@...nel.org, decui@...rosoft.com,
        linux-hyperv@...r.kernel.org, linux-kernel@...r.kernel.org,
        mikelley@...rosoft.com, tglx@...utronix.de, bp@...en8.de,
        dave.hansen@...ux.intel.com, x86@...nel.org, hpa@...or.com
Subject: Re: [PATCH v2] x86/Hyper-V: Expand definition of struct
 hv_vp_assist_page

On Mon, Nov 07, 2022 at 04:03:07PM +0530, Anirudh Rayabharam wrote:
> On Fri, Nov 04, 2022 at 11:38:43AM -0700, Saurabh Sengar wrote:
> > The struct hv_vp_assist_page has 24 bytes which is defined as u64[3],
> > expand that to expose vtl_entry_reason, vtl_ret_x64rax and vtl_ret_x64rcx
> > field. vtl_entry_reason is updated by hypervisor for the entry reason as
> > to why the VTL was entered on the virtual processor.
> > Guest updates the vtl_ret_* fields to provide the register values to
> > restore on VTL return. The specific register values that are restored
> > which will be updated on vtl_ret_x64rax and vtl_ret_x64rcx.
> > Also added the missing fields for synthetic_time_unhalted_timer_expired,
> > virtualization_fault_information and intercept_message.

I did a bit of stylistic changes to the commit message and queued this
up to hyperv-next. Thanks.