From: Anthony Liguori <anthony@codemonkey.ws>
To: Sebastian Herbszt <herbszt@gmx.de>
Cc: Avi Kivity <avi@qumranet.com>,
"Yang, Sheng" <sheng.yang@intel.com>,
kvm@vger.kernel.org
Subject: Re: [PATCH] kvm: bios: end AP boot code execution in rombios
Date: Sun, 17 Aug 2008 21:33:11 -0500 [thread overview]
Message-ID: <48A8DF67.90600@codemonkey.ws> (raw)
In-Reply-To: <1219012543$2777@local>
Sebastian Herbszt wrote:
> Jump to rombios before executing the halt loop.
>
Why? More importantly, why is this specific to KVM?
Regards,
Anthony Liguori
> Signed-off-by: Sebastian Herbszt <herbszt@gmx.de>
>
> diff -uNrp a/bios/rombios32start.S b/bios/rombios32start.S
> --- a/bios/rombios32start.S 2008-08-17 23:30:42.000000000 +0200
> +++ b/bios/rombios32start.S 2008-08-17 23:38:42.000000000 +0200
> @@ -40,6 +40,7 @@ _start:
>
> .code16
> smp_ap_boot_code_start:
> + cli
> xor %ax, %ax
> mov %ax, %ds
> xor %eax, %eax
> @@ -60,6 +61,7 @@ smp_ap_boot_code_start:
> 12:
>
> incw CPU_COUNT_ADDR
> + ljmp $0xe000, $(1f-_start)
> 1:
> hlt
> jmp 1b
>
> --
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>
next prev parent reply other threads:[~2008-08-18 2:33 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
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 [this message]
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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