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ArmPkg/ArmLib: mark all cached mappings as (inner) shareable

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Mark all cached memory mappings as shareable (or inner shareable on
AArch64) so that our view of memory is kept coherent by the hardware.

This is relevant for things like coherent DMA and virtualization (where
a guest may migrate to another core) but in general, since UEFI on ARM
is mostly used in a context where the secure firmware and possibly a
secure OS are already up and running, it is best to refrain from using
any non-shareable mappings.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18778 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Ard Biesheuvel
2015-11-12 11:40:57 +00:00
committed by abiesheuvel
parent 83586b5d50
commit 0c9a522f28
3 changed files with 19 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
ArmPkg/Include/Chipset/AArch64Mmu.h
View File

@@ -74,6 +74,11 @@
#define TT_NS BIT5
#define TT_AF BIT10
#define TT_SH_NON_SHAREABLE (0x0 << 8)
#define TT_SH_OUTER_SHAREABLE (0x2 << 8)
#define TT_SH_INNER_SHAREABLE (0x3 << 8)
#define TT_SH_MASK (0x3 << 8)
#define TT_PXN_MASK BIT53
#define TT_UXN_MASK BIT54 // EL1&0
#define TT_XN_MASK BIT54 // EL2 / EL3

8
ArmPkg/Include/Chipset/ArmV7Mmu.h
View File

@@ -175,14 +175,14 @@
#define TT_DESCRIPTOR_SECTION_WRITE_BACK(NonSecure) (TT_DESCRIPTOR_SECTION_TYPE_SECTION | \
((NonSecure) ? TT_DESCRIPTOR_SECTION_NS : 0) | \
TT_DESCRIPTOR_SECTION_NG_GLOBAL | \
TT_DESCRIPTOR_SECTION_S_NOT_SHARED | \
TT_DESCRIPTOR_SECTION_S_SHARED | \
TT_DESCRIPTOR_SECTION_DOMAIN(0) | \
TT_DESCRIPTOR_SECTION_AP_RW_RW | \
TT_DESCRIPTOR_SECTION_CACHE_POLICY_WRITE_BACK_ALLOC)
#define TT_DESCRIPTOR_SECTION_WRITE_THROUGH(NonSecure) (TT_DESCRIPTOR_SECTION_TYPE_SECTION | \
((NonSecure) ? TT_DESCRIPTOR_SECTION_NS : 0) | \
TT_DESCRIPTOR_SECTION_NG_GLOBAL | \
TT_DESCRIPTOR_SECTION_S_NOT_SHARED | \
TT_DESCRIPTOR_SECTION_S_SHARED | \
TT_DESCRIPTOR_SECTION_DOMAIN(0) | \
TT_DESCRIPTOR_SECTION_AP_RW_RW | \
TT_DESCRIPTOR_SECTION_CACHE_POLICY_WRITE_THROUGH_NO_ALLOC)
@@ -203,12 +203,12 @@
#define TT_DESCRIPTOR_PAGE_WRITE_BACK (TT_DESCRIPTOR_PAGE_TYPE_PAGE | \
TT_DESCRIPTOR_PAGE_NG_GLOBAL | \
TT_DESCRIPTOR_PAGE_S_NOT_SHARED | \
TT_DESCRIPTOR_PAGE_S_SHARED | \
TT_DESCRIPTOR_PAGE_AP_RW_RW | \
TT_DESCRIPTOR_PAGE_CACHE_POLICY_WRITE_BACK_ALLOC)
#define TT_DESCRIPTOR_PAGE_WRITE_THROUGH (TT_DESCRIPTOR_PAGE_TYPE_PAGE | \
TT_DESCRIPTOR_PAGE_NG_GLOBAL | \
TT_DESCRIPTOR_PAGE_S_NOT_SHARED | \
TT_DESCRIPTOR_PAGE_S_SHARED | \
TT_DESCRIPTOR_PAGE_AP_RW_RW | \
TT_DESCRIPTOR_PAGE_CACHE_POLICY_WRITE_THROUGH_NO_ALLOC)
#define TT_DESCRIPTOR_PAGE_DEVICE (TT_DESCRIPTOR_PAGE_TYPE_PAGE | \