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mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-23 12:43:55 +08:00
linux-next/arch/arm64
Catalin Marinas 7f0b1bf045 arm64: Fix barriers used for page table modifications
The architecture specification states that both DSB and ISB are required
between page table modifications and subsequent memory accesses using the
corresponding virtual address. When TLB invalidation takes place, the
tlb_flush_* functions already have the necessary barriers. However, there are
other functions like create_mapping() for which this is not the case.

The patch adds the DSB+ISB instructions in the set_pte() function for
valid kernel mappings. The invalid pte case is handled by tlb_flush_*
and the user mappings in general have a corresponding update_mmu_cache()
call containing a DSB. Even when update_mmu_cache() isn't called, the
kernel can still cope with an unlikely spurious page fault by
re-executing the instruction.

In addition, the set_pmd, set_pud() functions gain an ISB for
architecture compliance when block mappings are created.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Reported-by: Leif Lindholm <leif.lindholm@linaro.org>
Acked-by: Steve Capper <steve.capper@linaro.org>
Cc: Will Deacon <will.deacon@arm.com>
Cc: <stable@vger.kernel.org>
2014-07-24 10:25:42 +01:00
..
boot arm64: dts: Add more serial port nodes in APM X-Gene device tree 2014-06-18 12:41:55 +01:00
configs arm64: defconfig update for LTP 2014-06-18 12:40:52 +01:00
crypto arm64/crypto: improve performance of GHASH algorithm 2014-06-18 12:40:54 +01:00
include arm64: Fix barriers used for page table modifications 2014-07-24 10:25:42 +01:00
kernel arm64: Add support for 48-bit VA space with 64KB page configuration 2014-07-23 15:28:15 +01:00
kvm - Optimised assembly string/memory routines (based on the AArch64 Cortex 2014-06-06 10:43:28 -07:00
lib arm64: lib: Implement optimized string length routines 2014-05-23 15:17:12 +01:00
mm arm64: Determine the vmalloc/vmemmap space at build time based on VA_BITS 2014-07-23 15:28:05 +01:00
xen arm: xen: implement multicall hypercall support. 2014-04-24 13:09:46 +01:00
Kconfig arm64: Add support for 48-bit VA space with 64KB page configuration 2014-07-23 15:28:15 +01:00
Kconfig.debug arm64: Enable TEXT_OFFSET fuzzing 2014-07-10 12:36:58 +01:00
Makefile arm64: Enable TEXT_OFFSET fuzzing 2014-07-10 12:36:58 +01:00