From: "Sebastian Herbszt" <herbszt@gmx.de>
To: "Avi Kivity" <avi@qumranet.com>
Cc: "Yang, Sheng" <sheng.yang@intel.com>, <kvm@vger.kernel.org>
Subject: Re: [PATCH] kvm: bios: Put AP boot up code to 0x1000
Date: Thu, 14 Aug 2008 01:00:48 +0200 [thread overview]
Message-ID: <049b01c8fd98$90b27550$0201a8c0@zeug> (raw)
In-Reply-To: 489E9DAC.3030400@qumranet.com
Avi Kivity wrote:
>>
>> The AP enters HALT state with IF=0. What can make it resume at the
>> following "jmp 1b"? NMI? SMI?
>>
>
> Yes, but also INIT.
Are you sure the AP will continue after the hlt instruction on INIT?
I think it will start to execute code from the reset vector (0xfffffff0).
> We might ignore IF=0 for hlt (which would be a bug).
>
>> I think i read something about a need for 4kb alignment for the
>> startup vector in the mp specs. AP_BOOT_ADDR is currently
>> at 0x10000 (16 x 4kb).
>>
>
> Yes, the SIPI address is 4K x sipi vector.
>
- Sebastian
next prev parent reply other threads:[~2008-08-13 23:01 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-31 2:43 [PATCH] kvm: bios: Put AP boot up code to 0x1000 Yang, Sheng
2008-07-31 6:00 ` Yang, Sheng
2008-07-31 6:41 ` Avi Kivity
2008-07-31 9:09 ` Yang, Sheng
2008-07-31 9:46 ` Avi Kivity
2008-08-01 15:49 ` H. Peter Anvin
2008-07-31 21:15 ` Sebastian Herbszt
2008-08-01 1:19 ` Yang, Sheng
2008-08-02 19:30 ` Sebastian Herbszt
2008-08-05 8:14 ` Yang, Sheng
2008-08-06 21:56 ` Sebastian Herbszt
2008-08-10 7:50 ` Avi Kivity
2008-08-13 23:00 ` Sebastian Herbszt [this message]
2008-08-14 6:08 ` Avi Kivity
2008-08-17 22:35 ` [PATCH] kvm: bios: end AP boot code execution in rombios Sebastian Herbszt
2008-08-18 2:33 ` Anthony Liguori
2008-08-18 2:45 ` Yang, Sheng
2008-08-18 10:21 ` Avi Kivity
2008-08-18 10:22 ` Avi Kivity
2008-08-19 23:06 ` Sebastian Herbszt
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