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Subject: Re: [PATCH v19 12/25] mm: Introduce VM_SHSTK for shadow stack memory
To:     Cyrill Gorcunov <gorcunov@gmail.com>
Cc:     x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, linux-kernel@vger.kernel.org,
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        linux-arch@vger.kernel.org, linux-api@vger.kernel.org,
        Arnd Bergmann <arnd@arndb.de>,
        Andy Lutomirski <luto@kernel.org>,
        Balbir Singh <bsingharora@gmail.com>,
        Borislav Petkov <bp@alien8.de>,
        Dave Hansen <dave.hansen@linux.intel.com>,
        Eugene Syromiatnikov <esyr@redhat.com>,
        Florian Weimer <fweimer@redhat.com>,
        "H.J. Lu" <hjl.tools@gmail.com>, Jann Horn <jannh@google.com>,
        Jonathan Corbet <corbet@lwn.net>,
        Kees Cook <keescook@chromium.org>,
        Mike Kravetz <mike.kravetz@oracle.com>,
        Nadav Amit <nadav.amit@gmail.com>,
        Oleg Nesterov <oleg@redhat.com>, Pavel Machek <pavel@ucw.cz>,
        Peter Zijlstra <peterz@infradead.org>,
        Randy Dunlap <rdunlap@infradead.org>,
        "Ravi V. Shankar" <ravi.v.shankar@intel.com>,
        Vedvyas Shanbhogue <vedvyas.shanbhogue@intel.com>,
        Dave Martin <Dave.Martin@arm.com>,
        Weijiang Yang <weijiang.yang@intel.com>,
        Pengfei Xu <pengfei.xu@intel.com>
References: <20210203225547.32221-1-yu-cheng.yu@intel.com>
 <20210203225547.32221-13-yu-cheng.yu@intel.com> <20210204204636.GH2172@grain>
From:   "Yu, Yu-cheng" <yu-cheng.yu@intel.com>
Message-ID: <44f18779-efdb-e3f9-55d4-b46fb35d60cd@intel.com>
Date:   Thu, 4 Feb 2021 13:48:34 -0800
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On 2/4/2021 12:46 PM, Cyrill Gorcunov wrote:
> On Wed, Feb 03, 2021 at 02:55:34PM -0800, Yu-cheng Yu wrote:
>>   
>> diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
>> index 602e3a52884d..59623dcd92bb 100644
>> --- a/fs/proc/task_mmu.c
>> +++ b/fs/proc/task_mmu.c
>> @@ -661,6 +661,9 @@ static void show_smap_vma_flags(struct seq_file *m, struct vm_area_struct *vma)
>>   		[ilog2(VM_PKEY_BIT4)]	= "",
>>   #endif
>>   #endif /* CONFIG_ARCH_HAS_PKEYS */
>> +#ifdef CONFIG_X86_CET
>> +		[ilog2(VM_SHSTK)]	= "ss",
>> +#endif
>>   	};
> 
> IIRC we've these abbreviations explained in documentaion
> (proc.rst file). Could you please update it once time
> permit? I think it can be done on top of the series.
> 

I will add that.  Thanks!