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

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Date:   Tue, 14 Sep 2021 15:10:30 +0800
From:   Yang Zhong <yang.zhong@...el.com>
To:     Paolo Bonzini <pbonzini@...hat.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, yang.zhong@...el.com
Subject: Re: [RFC/RFT PATCH 0/2] x86: sgx_vepc: implement ioctl to EREMOVE
 all pages

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! 
     
  Yang


> Paolo
> 
> Paolo Bonzini (2):
>   x86: sgx_vepc: extract sgx_vepc_remove_page
>   x86: sgx_vepc: implement SGX_IOC_VEPC_REMOVE ioctl
> 
>  arch/x86/include/uapi/asm/sgx.h |  2 ++
>  arch/x86/kernel/cpu/sgx/virt.c  | 48 ++++++++++++++++++++++++++++++---
>  2 files changed, 47 insertions(+), 3 deletions(-)
> 
> -- 
> 2.27.0