From: Ard Biesheuvel Date: Thu, 19 Mar 2015 16:42:26 +0000 (+0000) Subject: ARM, arm64: kvm: get rid of the bounce page X-Git-Tag: omap-for-v4.1/fixes-rc1~125^2~15^2~1 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=06f75a1f6200;p=pandora-kernel.git ARM, arm64: kvm: get rid of the bounce page The HYP init bounce page is a runtime construct that ensures that the HYP init code does not cross a page boundary. However, this is something we can do perfectly well at build time, by aligning the code appropriately. For arm64, we just align to 4 KB, and enforce that the code size is less than 4 KB, regardless of the chosen page size. For ARM, the whole code is less than 256 bytes, so we tweak the linker script to align at a power of 2 upper bound of the code size Note that this also fixes a benign off-by-one error in the original bounce page code, where a bounce page would be allocated unnecessarily if the code was exactly 1 page in size. On ARM, it also fixes an issue with very large kernels reported by Arnd Bergmann, where stub sections with linker emitted veneers could erroneously trigger the size/alignment ASSERT() in the linker script. Tested-by: Marc Zyngier Reviewed-by: Marc Zyngier Signed-off-by: Ard Biesheuvel Signed-off-by: Will Deacon --- Reading git-diff-tree failed