From: mark.rutland@arm.com (Mark Rutland)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCHv2 07/18] arm64: mm: add code to safely replace TTBR1_EL1
Date: Tue, 5 Jan 2016 15:45:10 +0000 [thread overview]
Message-ID: <20160105154509.GE24664@leverpostej> (raw)
In-Reply-To: <20160105152218.GH6301@e104818-lin.cambridge.arm.com>
On Tue, Jan 05, 2016 at 03:22:18PM +0000, Catalin Marinas wrote:
> On Mon, Jan 04, 2016 at 05:56:40PM +0000, Mark Rutland wrote:
> > + .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?
Yes, it would.
I've folded that in locally.
Thanks,
Mark.
next prev parent reply other threads:[~2016-01-05 15:45 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-04 17:56 [PATCHv2 00/18] arm64: mm: rework page table creation Mark Rutland
2016-01-04 17:56 ` [PATCHv2 01/18] asm-generic: make __set_fixmap_offset a static inline Mark Rutland
2016-01-19 11:55 ` Mark Rutland
2016-01-19 14:11 ` Arnd Bergmann
2016-01-19 14:18 ` Mark Rutland
2016-01-28 15:10 ` Will Deacon
2016-01-04 17:56 ` [PATCHv2 02/18] arm64: mm: specialise pagetable allocators Mark Rutland
2016-01-04 17:56 ` [PATCHv2 03/18] arm64: mm: place empty_zero_page in bss Mark Rutland
2016-01-04 17:56 ` [PATCHv2 04/18] arm64: unify idmap removal Mark Rutland
2016-01-04 17:56 ` [PATCHv2 05/18] arm64: unmap idmap earlier Mark Rutland
2016-01-04 17:56 ` [PATCHv2 06/18] arm64: add function to install the idmap Mark Rutland
2016-01-04 17:56 ` [PATCHv2 07/18] arm64: mm: add code to safely replace TTBR1_EL1 Mark Rutland
2016-01-05 15:22 ` Catalin Marinas
2016-01-05 15:45 ` Mark Rutland [this message]
2016-01-04 17:56 ` [PATCHv2 08/18] arm64: kasan: avoid TLB conflicts Mark Rutland
2016-01-04 17:56 ` [PATCHv2 09/18] arm64: mm: move pte_* macros Mark Rutland
2016-01-04 17:56 ` [PATCHv2 10/18] arm64: mm: add functions to walk page tables by PA Mark Rutland
2016-01-04 17:56 ` [PATCHv2 11/18] arm64: mm: avoid redundant __pa(__va(x)) Mark Rutland
2016-01-04 17:56 ` [PATCHv2 12/18] arm64: mm: add __{pud,pgd}_populate Mark Rutland
2016-01-04 17:56 ` [PATCHv2 13/18] arm64: mm: add functions to walk tables in fixmap Mark Rutland
2016-01-04 22:49 ` Laura Abbott
2016-01-05 11:08 ` Mark Rutland
2016-01-04 17:56 ` [PATCHv2 14/18] arm64: mm: use fixmap when creating page tables Mark Rutland
2016-01-04 22:38 ` Laura Abbott
2016-01-05 10:40 ` Mark Rutland
2016-01-04 17:56 ` [PATCHv2 15/18] arm64: mm: allocate pagetables anywhere Mark Rutland
2016-01-04 17:56 ` [PATCHv2 16/18] arm64: mm: allow passing a pgdir to alloc_init_* Mark Rutland
2016-01-04 17:56 ` [PATCHv2 17/18] arm64: ensure _stext and _etext are page-aligned Mark Rutland
2016-01-04 17:56 ` [PATCHv2 18/18] arm64: mm: create new fine-grained mappings at boot Mark Rutland
2016-01-05 1:08 ` [PATCHv2 00/18] arm64: mm: rework page table creation Laura Abbott
2016-01-05 11:54 ` Mark Rutland
2016-01-05 18:36 ` Laura Abbott
2016-01-05 18:58 ` Mark Rutland
2016-01-05 19:17 ` Laura Abbott
2016-01-06 11:10 ` Mark Rutland
2016-01-08 19:15 ` Mark Rutland
2016-01-06 10:24 ` Catalin Marinas
2016-01-06 11:36 ` Mark Rutland
2016-01-06 14:23 ` Ard Biesheuvel
2016-01-18 14:47 ` Ard Biesheuvel
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