linux/arch/arm64
Catalin Marinas 285994a62c arm64: Invalidate the TLB corresponding to intermediate page table levels
The ARM architecture allows the caching of intermediate page table
levels and page table freeing requires a sequence like:

	pmd_clear()
	TLB invalidation
	pte page freeing

With commit 5e5f6dc105 (arm64: mm: enable HAVE_RCU_TABLE_FREE logic),
the page table freeing batching was moved from tlb_remove_page() to
tlb_remove_table(). The former takes care of TLB invalidation as this is
also shared with pte clearing and page cache page freeing. The latter,
however, does not invalidate the TLBs for intermediate page table levels
as it probably relies on the architecture code to do it if required.
When the mm->mm_users < 2, tlb_remove_table() does not do any batching
and page table pages are freed before tlb_finish_mmu() which performs
the actual TLB invalidation.

This patch introduces __tlb_flush_pgtable() for arm64 and calls it from
the {pte,pmd,pud}_free_tlb() directly without relying on deferred page
table freeing.

Fixes: 5e5f6dc105 arm64: mm: enable HAVE_RCU_TABLE_FREE logic
Reported-by: Jon Masters <jcm@redhat.com>
Tested-by: Jon Masters <jcm@redhat.com>
Tested-by: Steve Capper <steve.capper@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2015-03-14 10:48:30 +00:00
..
boot arm64: Add L2 cache topology to ARM Ltd boards/models 2015-02-25 17:12:21 +01:00
configs ARM: SoC 64-bit changes and additions 2015-02-17 09:47:46 -08:00
crypto arm64: crypto: increase AES interleave to 4x 2015-02-26 18:31:46 +00:00
include arm64: Invalidate the TLB corresponding to intermediate page table levels 2015-03-14 10:48:30 +00:00
kernel arm64: compat Fix siginfo_t -> compat_siginfo_t conversion on big endian 2015-02-27 18:05:56 +00:00
kvm Fairly small update, but there are some interesting new features. 2015-02-13 09:55:09 -08:00
lib arm64: __clear_user: handle exceptions on strb 2014-11-13 15:21:26 +00:00
mm arm64: Don't use is_module_addr in setting page attributes 2015-03-06 12:04:22 +00:00
net arm64: bpf: lift restriction on last instruction 2014-12-03 18:04:09 +00:00
xen arm: xen: implement multicall hypercall support. 2014-04-24 13:09:46 +01:00
Kconfig ARM: SoC 64-bit changes and additions 2015-02-17 09:47:46 -08:00
Kconfig.debug arm64: add better page protections to arm64 2015-01-22 14:54:29 +00:00
Makefile arm64 updates for 3.20: 2015-02-11 18:03:54 -08:00