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Open Source and information security mailing list archives
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Date: Thu, 13 Dec 2012 16:13:49 -0800 From: Yinghai Lu <yinghai@...nel.org> To: "H. Peter Anvin" <hpa@...or.com> Cc: Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...e.hu>, "Eric W. Biederman" <ebiederm@...ssion.com>, Andrew Morton <akpm@...ux-foundation.org>, linux-kernel@...r.kernel.org Subject: Re: [PATCH v6 19/27] x86, boot: update comments about entries for 64bit image On Thu, Dec 13, 2012 at 3:27 PM, H. Peter Anvin <hpa@...or.com> wrote: > On 12/13/2012 02:02 PM, Yinghai Lu wrote: >> + * If we come here from a bootloader, kernel(text+data+bss+brk), >> + * ramdisk, zero_page, command line could be above 4G. >> + * We depend on an identity mapped page table being provided >> + * that maps our entire kernel(text+data+bss+brk), and hopefully >> + * all of memory. > > We should make it explicit what we depend on. We certainly *can* depend > only on text+data+bss+brk ... with the dynamic page table approach we > can do that, and that would be most conservative; if we depend on other > things we should make that explicit, not just here but in boot.txt. yes, in my version, only need kernel(text+data+bss+brk) get mapped. aka the INIT_SIZE for decompressing. -- 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/
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