[PATCHv2 07/18] arm64: mm: add code to safely replace TTBR1_EL1
flat view
From: Catalin Marinas <catalin.marinas@arm.com>
Date: 2016-01-05 15:22:18
On Mon, Jan 04, 2016 at 05:56:40PM +0000, Mark Rutland wrote:
quoted hunk ↗ jump to hunk
+ .pushsection ".idmap.text", "ax" +/* + * void idmap_cpu_replace_ttbr1(phys_addr_t new_pgd, phys_addr_t reserved_pgd) + * + * This is the low-level counterpart to cpu_replace_ttbr1, and should not be + * called by anything else. It can only be executed from a TTBR0 mapping. + */ +ENTRY(idmap_cpu_replace_ttbr1) + mrs x2, daif + msr daifset, #0xf + + msr ttbr1_el1, x1
Would it work to avoid the second argument and only use adrp, now that empty_zero_page is at a fixed offset relative to this function? -- Catalin