From: Thomas Gleixner <tglx@linutronix.de>
To: "taoyi.ty" <escape@linux.alibaba.com>,
ira.weiny@intel.com, Dave Hansen <dave.hansen@linux.intel.com>,
Dan Williams <dan.j.williams@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>,
Fenghua Yu <fenghua.yu@intel.com>,
"Hansen, Dave" <dave.hansen@intel.com>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Andy Lutomirski <luto@kernel.org>,
"H. Peter Anvin" <hpa@zytor.com>,
Rick Edgecombe <rick.p.edgecombe@intel.com>,
x86@kernel.org, linux-kernel@vger.kernel.org,
nvdimm@lists.linux.dev, linux-mm@kvack.org
Subject: Re: [PATCH V7 05/18] x86/pks: Add PKS setup code
Date: Fri, 26 Nov 2021 10:57:55 +0100 [thread overview]
Message-ID: <87r1b3grx8.ffs@tglx> (raw)
In-Reply-To: <020e6b6c-55ba-2079-7720-bd9dbb1bf335@linux.alibaba.com>
On Fri, Nov 26 2021 at 11:11, taoyi ty wrote:
> On 11/25/21 11:15 PM, Thomas Gleixner wrote:
>>> +void setup_pks(void)
>>> +{
>>> + if (!cpu_feature_enabled(X86_FEATURE_PKS))
>>> + return;
>>> +
>>> + write_pkrs(pkrs_init_value);
>>
>> Is the init value set up _before_ this function is invoked for the first
>> time?
>>
> Setting up for cpu0 is before create_initial_pkrs_value. therefore pkrs
> value of cpu0 won't be set correctly.
>
> [root@AliYun ~]# rdmsr -a 0x000006E1
> 0
> 55555554
> 55555554
> 55555554
> 55555554
> 55555554
> 55555554
> 55555554
> 55555554
> 55555554
>
> Here are my test results after applying the patches
Thanks for confirming what I assumed from looking at the patches!
tglx
next prev parent reply other threads:[~2021-11-26 10:00 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-04 4:32 [PATCH V7 00/18] PKS/PMEM: Add Stray Write Protection ira.weiny
2021-08-04 4:32 ` [PATCH V7 01/18] x86/pkeys: Create pkeys_common.h ira.weiny
2021-08-04 4:32 ` [PATCH V7 02/18] x86/fpu: Refactor arch_set_user_pkey_access() ira.weiny
2021-11-25 14:23 ` Thomas Gleixner
2021-08-04 4:32 ` [PATCH V7 03/18] x86/pks: Add additional PKEY helper macros ira.weiny
2021-11-25 14:25 ` Thomas Gleixner
2021-11-25 16:58 ` Thomas Gleixner
2021-12-08 0:51 ` Ira Weiny
2021-12-08 15:11 ` Thomas Gleixner
2021-08-04 4:32 ` [PATCH V7 04/18] x86/pks: Add PKS defines and Kconfig options ira.weiny
2021-08-04 4:32 ` [PATCH V7 05/18] x86/pks: Add PKS setup code ira.weiny
2021-11-25 15:15 ` Thomas Gleixner
2021-11-26 3:11 ` taoyi.ty
2021-11-26 9:57 ` Thomas Gleixner [this message]
2021-11-26 11:03 ` Thomas Gleixner
2021-08-04 4:32 ` [PATCH V7 06/18] x86/fault: Adjust WARN_ON for PKey fault ira.weiny
2021-08-04 4:32 ` [PATCH V7 07/18] x86/pks: Preserve the PKRS MSR on context switch ira.weiny
2021-11-25 15:25 ` Thomas Gleixner
2021-08-04 4:32 ` [PATCH V7 08/18] x86/entry: Preserve PKRS MSR across exceptions ira.weiny
2021-11-13 0:50 ` Ira Weiny
2021-11-25 11:19 ` Thomas Gleixner
2021-12-03 1:13 ` Andy Lutomirski
2021-11-25 14:12 ` Thomas Gleixner
2021-12-07 1:54 ` Ira Weiny
2021-12-07 4:45 ` Ira Weiny
2021-12-08 0:21 ` Thomas Gleixner
2021-08-04 4:32 ` [PATCH V7 09/18] x86/pks: Add PKS kernel API ira.weiny
2021-08-04 4:32 ` [PATCH V7 10/18] x86/pks: Introduce pks_abandon_protections() ira.weiny
2021-08-04 4:32 ` [PATCH V7 11/18] x86/pks: Add PKS Test code ira.weiny
2021-08-04 4:32 ` [PATCH V7 12/18] x86/pks: Add PKS fault callbacks ira.weiny
2021-08-11 21:18 ` Edgecombe, Rick P
2021-08-17 3:21 ` Ira Weiny
2021-08-04 4:32 ` [PATCH V7 13/18] memremap_pages: Add access protection via supervisor Protection Keys (PKS) ira.weiny
2021-08-04 4:32 ` [PATCH V7 14/18] memremap_pages: Add memremap.pks_fault_mode ira.weiny
2021-08-04 4:57 ` Randy Dunlap
2021-08-07 19:32 ` Ira Weiny
2021-08-11 19:01 ` Edgecombe, Rick P
2021-08-17 3:12 ` Ira Weiny
2021-08-04 4:32 ` [PATCH V7 15/18] kmap: Add stray access protection for devmap pages ira.weiny
2021-08-04 4:32 ` [PATCH V7 16/18] dax: Stray access protection for dax_direct_access() ira.weiny
2021-08-04 4:32 ` [PATCH V7 17/18] nvdimm/pmem: Enable stray access protection ira.weiny
2021-08-04 4:32 ` [PATCH V7 18/18] devdax: " ira.weiny
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=87r1b3grx8.ffs@tglx \
--to=tglx@linutronix.de \
--cc=bp@alien8.de \
--cc=dan.j.williams@intel.com \
--cc=dave.hansen@intel.com \
--cc=dave.hansen@linux.intel.com \
--cc=escape@linux.alibaba.com \
--cc=fenghua.yu@intel.com \
--cc=hpa@zytor.com \
--cc=ira.weiny@intel.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=luto@kernel.org \
--cc=mingo@redhat.com \
--cc=nvdimm@lists.linux.dev \
--cc=peterz@infradead.org \
--cc=rick.p.edgecombe@intel.com \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).