linux-kernel - Re: [PATCH v2 4/6] x86/tdx: Expand __tdx_hypercall() to handle more arguments

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Date:   Fri, 9 Dec 2022 01:07:05 +0300
From:   "Kirill A. Shutemov" <kirill@...temov.name>
To:     Dexuan Cui <decui@...rosoft.com>
Cc:     ak@...ux.intel.com, arnd@...db.de, bp@...en8.de,
        brijesh.singh@....com, dan.j.williams@...el.com,
        dave.hansen@...ux.intel.com, haiyangz@...rosoft.com, hpa@...or.com,
        jane.chu@...cle.com, kirill.shutemov@...ux.intel.com,
        kys@...rosoft.com, linux-arch@...r.kernel.org,
        linux-hyperv@...r.kernel.org, luto@...nel.org, mingo@...hat.com,
        peterz@...radead.org, rostedt@...dmis.org,
        sathyanarayanan.kuppuswamy@...ux.intel.com, seanjc@...gle.com,
        tglx@...utronix.de, tony.luck@...el.com, wei.liu@...nel.org,
        x86@...nel.org, mikelley@...rosoft.com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 4/6] x86/tdx: Expand __tdx_hypercall() to handle more
 arguments

On Tue, Dec 06, 2022 at 04:33:23PM -0800, Dexuan Cui wrote:
> From: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
> 
> So far __tdx_hypercall() only handles six arguments for VMCALL.
> Expanding it to six more register would allow to cover more use-cases.
> 
> Using RDI and RSI as VMCALL arguments requires more register shuffling.
> RAX is used to hold tdx_hypercall_args pointer and RBP stores flags.
> 
> While there, fix typo in the comment on panic branch.
> 
> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
> Reviewed-by: Dexuan Cui <decui@...rosoft.com>
> Tested-by: Dexuan Cui <decui@...rosoft.com>

Since you submit the patch you need to add your Signed-off-by.

-- 
  Kiryl Shutsemau / Kirill A. Shutemov