linux-kernel - Re: [RFC PATCH v6 1/3] selftests/x86: sysret

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Date:   Thu, 26 Jan 2023 06:01:54 +0700
From:   Ammar Faizi <ammarfaizi2@...weeb.org>
To:     "H. Peter Anvin" <hpa@...or.com>, Xin Li <xin3.li@...el.com>
Cc:     Dave Hansen <dave.hansen@...el.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Andrew Cooper <Andrew.Cooper3@...rix.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Brian Gerst <brgerst@...il.com>,
        Borislav Petkov <bp@...en8.de>, Shuah Khan <shuah@...nel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Andy Lutomirski <luto@...nel.org>,
        x86 Mailing List <x86@...nel.org>,
        Linux Kselftest Mailing List 
        <linux-kselftest@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH v6 1/3] selftests/x86: sysret_rip: Handle syscall in
 a FRED system

On Thu, Jan 26, 2023 at 04:17:12AM +0700, Ammar Faizi wrote:
> +/*
> + * REGS_SAVED  = %rcx and %r11 preserved.
> + * REGS_SYSRET = %rcx and %r11 set to %rflags and %rip.
> + * REGS_ERROR  = %rcx and/or %r11 set to any other values.

Since we moved the assertion into check_regs_result(), we no longer
need REGS_ERROR. check_regs_result() is now a void function.

Will remove that comment...

-- 
Ammar Faizi