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

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Message-ID: <24f4cef8-3e87-4303-9fb3-0011339fdceb@linux.microsoft.com>
Date:   Thu, 17 Nov 2022 09:34:21 +0530
From:   Jinank Jain <jinankjain@...ux.microsoft.com>
To:     Wei Liu <wei.liu@...nel.org>
Cc:     jinankjain@...rosoft.com, kys@...rosoft.com,
        haiyangz@...rosoft.com, 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 11/16/2022 5:42 PM, Wei Liu wrote:
> 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?

It is fixed in v4 of the patch series.

Regards,

Jinank


>
>>    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
>>