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Message-ID: <SA1PR11MB6734D8D63E5404E2F2C23203A8C99@SA1PR11MB6734.namprd11.prod.outlook.com>
Date: Tue, 24 Jan 2023 23:58:51 +0000
From: "Li, Xin3" <xin3.li@...el.com>
To: "andrew.cooper3@...rix.com" <andrew.cooper3@...rix.com>,
Ammar Faizi <ammarfaizi2@...weeb.org>,
"H. Peter Anvin" <hpa@...or.com>, x86 Mailing List <x86@...nel.org>
CC: "Hansen, Dave" <dave.hansen@...el.com>,
Dave Hansen <dave.hansen@...ux.intel.com>,
Thomas Gleixner <tglx@...utronix.de>,
"Brian Gerst" <brgerst@...il.com>, Ingo Molnar <mingo@...hat.com>,
Borislav Petkov <bp@...en8.de>,
Peter Zijlstra <peterz@...radead.org>,
Shuah Khan <shuah@...nel.org>, Ingo Molnar <mingo@...nel.org>,
"Lutomirski, Andy" <luto@...nel.org>,
"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
Linux Kselftest Mailing List
<linux-kselftest@...r.kernel.org>,
"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>,
"andrew.cooper3@...rix.com" <andrew.cooper3@...rix.com>
Subject: RE: [RFC PATCH v3 0/2] selftests/x86: sysret_rip update for FRED
system
> >> assert(ctx->uc_mcontext.gregs[REG_EFL] ==
> >> ctx->uc_mcontext.gregs[REG_R11]);
> > On FRED systems, flags is 0x200a93 and r11 is 0xfeedfacedeadbeef here.
>
> Is this under SIMICS, or elsewhere? It's doubly weird that flags/%r11 match, but
> %rip/%rcx don't.
This is on Intel Simics, with FRED enabled.
Flags and %r11 don’t match on FRED, and %rip and %rcx also don't match.
I think it's expected.
Xin
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