linux-kernel - Re: [PATCH 09/10] x86, xsave: check cpuid level for XSTATE

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 20 Jul 2010 15:51:07 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Suresh Siddha <suresh.b.siddha@...el.com>
CC:	Robert Richter <robert.richter@....com>,
	Ingo Molnar <mingo@...e.hu>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 09/10] x86, xsave: check cpuid level for XSTATE_CPUID
 (0x0d)

On 07/20/2010 03:26 PM, Suresh Siddha wrote:
> On Tue, 2010-07-20 at 11:50 -0700, Robert Richter wrote:
>> The patch adds a check that tests if XSTATE_CPUID exists.
>>
>> Signed-off-by: Robert Richter <robert.richter@....com>
> 
> While we are at this, can you please rename the other hardcoded 0xd's
> with XSTATE_CPUID in xsave.c?
> 
>> + struct cpuinfo_x86 *c = &cpu_data(0);
> 
> Can we use boot_cpu_data instead of cpu_data(0).
> 

I think boot_cpu_data is the right thing for the early stuff like this
(early_cpu_init() initializes boot_cpu_data, not cpu_data(0)) so just
use boot_cpu_data.cpuid_level instead of forming a pointer.

	-hpa
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/