linux-kernel - Re: [PATCH v3 0/5] Add support running nested Microsoft Hypervisor

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Message-ID: <Y3TTt/mOe3pzDLZn@liuwe-devbox-debian-v2>
Date:   Wed, 16 Nov 2022 12:12:39 +0000
From:   Wei Liu <wei.liu@...nel.org>
To:     Jinank Jain <jinankjain@...ux.microsoft.com>
Cc:     jinankjain@...rosoft.com, kys@...rosoft.com,
        haiyangz@...rosoft.com, wei.liu@...nel.org, decui@...rosoft.com,
        tglx@...utronix.de, mingo@...hat.com, bp@...en8.de,
        dave.hansen@...ux.intel.com, x86@...nel.org, hpa@...or.com,
        arnd@...db.de, peterz@...radead.org, jpoimboe@...nel.org,
        seanjc@...gle.com, kirill.shutemov@...ux.intel.com,
        ak@...ux.intel.com, sathyanarayanan.kuppuswamy@...ux.intel.com,
        linux-hyperv@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arch@...r.kernel.org, anrayabh@...ux.microsoft.com,
        mikelley@...rosoft.com
Subject: Re: [PATCH v3 0/5]  Add support running nested Microsoft Hypervisor

On Thu, Nov 03, 2022 at 01:04:02PM +0000, Jinank Jain wrote:
> This patch series plans to add support for running nested Microsoft
> Hypervisor. In case of nested Microsoft Hypervisor there are few
> privileged hypercalls which need to go L0 Hypervisor instead of L1
> Hypervisor. This patches series basically identifies such hypercalls and
> replace them with nested hypercalls.
> 
> Jinank Jain (5):
>   x86/hyperv: Add support for detecting nested hypervisor

I see `__weak hv_nested` in this patch.

I guess this version has fixed ARM64 build?

>   Drivers: hv: Setup synic registers in case of nested root partition
>   x86/hyperv: Add an interface to do nested hypercalls
>   Drivers: hv: Enable vmbus driver for nested root partition
>   x86/hyperv: Change interrupt vector for nested root partition
> 
>  arch/x86/include/asm/hyperv-tlfs.h | 17 +++++++-
>  arch/x86/include/asm/idtentry.h    |  2 +
>  arch/x86/include/asm/irq_vectors.h |  6 +++
>  arch/x86/include/asm/mshyperv.h    | 68 ++++++++++++++++++++++++++++--
>  arch/x86/kernel/cpu/mshyperv.c     | 22 ++++++++++
>  arch/x86/kernel/idt.c              |  9 ++++
>  drivers/hv/hv.c                    | 18 +++++---
>  drivers/hv/hv_common.c             |  7 ++-
>  drivers/hv/vmbus_drv.c             |  5 ++-
>  include/asm-generic/hyperv-tlfs.h  |  1 +
>  10 files changed, 141 insertions(+), 14 deletions(-)
> 
> -- 
> 2.25.1
>