From mboxrd@z Thu Jan 1 00:00:00 1970 From: leif.lindholm@linaro.org (Leif Lindholm) Date: Mon, 11 Aug 2014 17:14:48 +0100 Subject: [PATCH] ARM: expand fixmap region to 3MB In-Reply-To: <1407511404-11997-1-git-send-email-robherring2@gmail.com> References: <1407511404-11997-1-git-send-email-robherring2@gmail.com> Message-ID: <20140811161448.GA4002@bivouac.eciton.net> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Fri, Aug 08, 2014 at 10:23:24AM -0500, Rob Herring wrote: > From: Rob Herring > > With commit a05e54c103b0b8 "ARM: 8031/2: change fixmap mapping region to > support 32 CPUs", the fixmap region was expanded to 2MB, but it > precluded any other uses of the fixmap region in order to support up to > 32 CPUs. In order to support other uses the fixmap region needs to be > expanded beyond 2MB. Fortunately, the adjacent 1MB range > 0xffe00000-0xfff00000 is availabe to use. > > Remove fixmap_page_table ptr and lookup the page table via the virtual > address so that the fixmap region can span more that one pmd. The 2nd > pmd is already created since it is shared with the vector page. > > Cc: Leif Lindholm > Cc: Kees Cook > Cc: Russell King > Signed-off-by: Rob Herring > --- > > This patch can come before or after the generic fixmap.h. There's a > single line conflict with the ending address Tested-by: Leif Lindholm For Kees' set with this addition + generic fixmap + early_ioremap + UEFI. > This worked for earlycon, but I've not done any highmem specific > testing. My full series is available here: > > git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git fixmap I was hoping to be able to give you a tested-by for that series on next-20140811 with the UEFI patches, but that setup fails to boot right now. Looking into why. / Leif