From mboxrd@z Thu Jan 1 00:00:00 1970 From: linux@arm.linux.org.uk (Russell King - ARM Linux) Date: Thu, 8 Oct 2015 10:40:55 +0100 Subject: [PATCH V4 2/3] arm64: support initrd outside kernel linear map In-Reply-To: References: <1439830867-14935-1-git-send-email-msalter@redhat.com> <1439830867-14935-3-git-send-email-msalter@redhat.com> <20150908113113.GA20562@leverpostej> <20151006171140.GE26433@leverpostej> <1444151812.10788.14.camel@redhat.com> <20151008084953.GA20114@cbox> Message-ID: <20151008094055.GC32532@n2100.arm.linux.org.uk> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Thu, Oct 08, 2015 at 05:18:14PM +0800, yalin wang wrote: > is it also possible to implement it on ARM platforms? > ARM64 platform don?t have HIGH_MEM zone . > but ARM platform have . > i remember boot loader must put init rd into low memory region, > so if some boot loader put init rd into HIGH men zone > we can also relocate it to low men region ? > then boot loader don?t need care about this , > and since vmalloc= boot option will change HIGH mem region size, > if we can relocate init rd , boot loader don?t need care about init rd load address, > when change vmalloc= boot options . I'd be more inclined to say yes if the kernel wasn't buggering around passing virtual addresses (initrd_start) of the initrd image around, but instead used a physical address. initrd_start must be a lowmem address. -- FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up according to speedtest.net.