linux-kernel - Re: [PATCH] x86: read apic id if it is not acpi

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 for Android: free password hash cracker in your pocket

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

Date:	Sat, 2 May 2009 11:02:54 +0400
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Ed Swierk <eswierk@...stanetworks.com>
Subject: Re: [PATCH] x86: read apic id if it is not acpi_lapic

[Yinghai Lu - Fri, May 01, 2009 at 09:48:34PM -0700]
| 
| Ed found that on 32bit, boot_cpu_physical_apicid is not read right,
| when mptable is broken.
| 
| interesting, actually three path
| 1. acpi: at that time, at that time that is already read from reg.
| 2. mptable: that only read from mptable.
| 3. no madt, and no mptable, that use default apic id 0 for 64bit, -1 for 32bit
| 
| so could read that apic id for 2/3 path.
| 
| also could avoid set fixmap that lapic two times when acpi_lapic is used.
| and need to move cpu_has_apic earlier and call apic_disable()
| 
| Reported-by: Ed Swierk <eswierk@...stanetworks.com>
| Signed-off-by: Yinghai Lu <yinghai@...nel.org>
| Cc: Cyrill Gorcunov <gorcunov@...nvz.org>
| 

Thanks Yinghai! My Ack if needed.

	-- Cyrill
--
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/