linux-kernel - Re: [RFC/RFT PATCH 0/2] x86: sgx_vepc: implement ioctl to EREMOVE all pages

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Message-ID: <8e1c6b6d-6a73-827e-f496-b17b3c0f8c89@redhat.com>
Date:   Tue, 14 Sep 2021 12:19:31 +0200
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Yang Zhong <yang.zhong@...el.com>
Cc:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org, x86@...nel.org,
        linux-sgx@...r.kernel.org, jarkko@...nel.org,
        dave.hansen@...ux.intel.com
Subject: Re: [RFC/RFT PATCH 0/2] x86: sgx_vepc: implement ioctl to EREMOVE all
 pages

On 14/09/21 09:10, Yang Zhong wrote:
> On Mon, Sep 13, 2021 at 09:11:51AM -0400, Paolo Bonzini wrote:
>> Based on discussions from the previous week(end), this series implements
>> a ioctl that performs EREMOVE on all pages mapped by a /dev/sgx_vepc
>> file descriptor.  Other possibilities, such as closing and reopening
>> the device, are racy.
>>
>> The patches are untested, but I am posting them because they are simple
>> and so that Yang Zhong can try using them in QEMU.
>>
> 
>    Paolo, i re-implemented one reset patch in the Qemu side to call this ioctl(),
>    and did some tests on Windows and Linux guest, the Windows/Linux guest reboot
>    work well.
> 
>    So, it is time for me to send this reset patch to Qemu community? or wait for
>    this kernel patchset merged? thanks!

Let's wait for this patch to be accepted first.  I'll wait a little more 
for Jarkko and Dave to comment on this, and include your "Tested-by".

I will also add cond_resched() on the final submission.

Paolo