linux-kernel - Re: [PATCH v4 2/6] x86/tdx: Support vmalloc() for tdx_enc_status

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Message-ID: <20230412151937.pxfyralfichwzyv6@box>
Date:   Wed, 12 Apr 2023 18:19:37 +0300
From:   "kirill.shutemov@...ux.intel.com" <kirill.shutemov@...ux.intel.com>
To:     "Michael Kelley (LINUX)" <mikelley@...rosoft.com>
Cc:     Dexuan Cui <decui@...rosoft.com>,
        "ak@...ux.intel.com" <ak@...ux.intel.com>,
        "arnd@...db.de" <arnd@...db.de>, "bp@...en8.de" <bp@...en8.de>,
        "brijesh.singh@....com" <brijesh.singh@....com>,
        "dan.j.williams@...el.com" <dan.j.williams@...el.com>,
        "dave.hansen@...ux.intel.com" <dave.hansen@...ux.intel.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        "hpa@...or.com" <hpa@...or.com>,
        "jane.chu@...cle.com" <jane.chu@...cle.com>,
        KY Srinivasan <kys@...rosoft.com>,
        "linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>,
        "linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org>,
        "luto@...nel.org" <luto@...nel.org>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "peterz@...radead.org" <peterz@...radead.org>,
        "rostedt@...dmis.org" <rostedt@...dmis.org>,
        "sathyanarayanan.kuppuswamy@...ux.intel.com" 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>,
        "seanjc@...gle.com" <seanjc@...gle.com>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "tony.luck@...el.com" <tony.luck@...el.com>,
        "wei.liu@...nel.org" <wei.liu@...nel.org>,
        "x86@...nel.org" <x86@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Tianyu Lan <Tianyu.Lan@...rosoft.com>
Subject: Re: [PATCH v4 2/6] x86/tdx: Support vmalloc() for
 tdx_enc_status_changed()

On Tue, Apr 11, 2023 at 04:28:20PM +0000, Michael Kelley (LINUX) wrote:
> From: Dexuan Cui <decui@...rosoft.com> Sent: Saturday, April 8, 2023 1:48 PM
> > 
> > When a TDX guest runs on Hyper-V, the hv_netvsc driver's netvsc_init_buf()
> > allocates buffers using vzalloc(), and needs to share the buffers with the
> > host OS by calling set_memory_decrypted(), which is not working for
> > vmalloc() yet. Add the support by handling the pages one by one.
> > 
> > Co-developed-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>

Co-developed-by requires[1] Signed-off-by. You can use mine, if you want.

[1] Documentation/process/submitting-patches.rst

-- 
  Kiryl Shutsemau / Kirill A. Shutemov