linux-kernel - Re: [PATCH] x86/tdx: Drop flags from __tdx

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Message-ID: <Y9kBxcBC9EfJuVva@hirez.programming.kicks-ass.net>
Date:   Tue, 31 Jan 2023 12:55:49 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Cc:     Dave Hansen <dave.hansen@...el.com>,
        Borislav Petkov <bp@...en8.de>,
        Andy Lutomirski <luto@...nel.org>,
        Kuppuswamy Sathyanarayanan 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>,
        Thomas Gleixner <tglx@...utronix.de>, x86@...nel.org,
        linux-coco@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86/tdx: Drop flags from __tdx_hypercall()

On Tue, Jan 31, 2023 at 02:14:06PM +0300, Kirill A. Shutemov wrote:
> After TDX_HCALL_ISSUE_STI got dropped, the only flag left is
> TDX_HCALL_HAS_OUTPUT. The flag indicates if the caller wants to see
> tdx_hypercall_args updated based on the hypercall output.
> 
> Drop the flags and provide __tdx_hypercall_ret() that matches
> TDX_HCALL_HAS_OUTPUT semantics.
> 
> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
> Suggested-by: Peter Zijlstra <peterz@...radead.org>

Nice!