kernel/git/stable/linux.git/Documentation/arm64/memory.txt, branch master

docs: arm64: convert docs to ReST and rename to .rst

2019-06-14T20:20:27+00:00

The documentation is in a format that is very close to ReST format. The conversion is actually: - add blank lines in order to identify paragraphs; - fixing tables markups; - adding some lists markups; - marking literal blocks; - adjust some title markups. At its new index.rst, let's add a :orphan: while this is not linked to the main index.rst file, in order to avoid build warnings. Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Jonathan Corbet

arm64: KVM: Allow mapping of vectors outside of the RAM region

2018-03-19T13:06:46+00:00

We're now ready to map our vectors in weird and wonderful locations. On enabling ARM64_HARDEN_EL2_VECTORS, a vector slot gets allocated if this hasn't been already done via ARM64_HARDEN_BRANCH_PREDICTOR and gets mapped outside of the normal RAM region, next to the idmap. That way, being able to obtain VBAR_EL2 doesn't reveal the mapping of the rest of the hypervisor code. Acked-by: Catalin Marinas Signed-off-by: Marc Zyngier

arm64: Update the KVM memory map documentation

2018-03-19T13:05:31+00:00

Update the documentation to reflect the new tricks we play on the EL2 mappings... Acked-by: Christoffer Dall Acked-by: Catalin Marinas Signed-off-by: Marc Zyngier

arm64: fix documentation on kernel pages mappings to HYP VA

2017-10-02T09:13:05+00:00

The Documentation/arm64/memory.txt says: When using KVM, the hypervisor maps kernel pages in EL2, at a fixed offset from the kernel VA (top 24bits of the kernel VA set to zero): In fact, kernel addresses are transleted to HYP with kern_hyp_va macro, which has more options, and none of them assumes clearing of top 24bits of the kernel VA. Acked-by: Marc Zyngier Signed-off-by: Yury Norov [will: removed gory details] Signed-off-by: Will Deacon

Documentation/arm64/memory.txt: fix typo

2014-10-20T16:55:38+00:00

There is no swapper_pgd_dir, it meant swapper_pg_dir. Signed-off-by: Alex Bennée Signed-off-by: Catalin Marinas

arm64: Add support for 48-bit VA space with 64KB page configuration

2014-07-23T14:28:15+00:00

This patch allows support for 3 levels of page tables with 64KB page configuration allowing 48-bit VA space. The pgd is no longer a full PAGE_SIZE (PTRS_PER_PGD is 64) and (swapper|idmap)_pg_dir are not fully populated (pgd_alloc falls back to kzalloc). Signed-off-by: Catalin Marinas Tested-by: Jungseok Lee

arm64: Determine the vmalloc/vmemmap space at build time based on VA_BITS

2014-07-23T14:28:05+00:00

Rather than guessing what the maximum vmmemap space should be, this patch allows the calculation based on the VA_BITS and sizeof(struct page). The vmalloc space extends to the beginning of the vmemmap space. Since the virtual kernel memory layout now depends on the build configuration, this patch removes the detailed description in Documentation/arm64/memory.txt in favour of information printed during kernel booting. Signed-off-by: Catalin Marinas Tested-by: Jungseok Lee

arm64: Add a description on 48-bit address space with 4KB pages

2014-07-23T14:27:28+00:00

This patch adds memory layout and translation lookup information about 48-bit address space with 4K pages. The description is based on 4 levels of translation tables. Signed-off-by: Jungseok Lee Reviewed-by: Sungjinn Chung Acked-by: Kukjin Kim Acked-by: Christoffer Dall Signed-off-by: Catalin Marinas Tested-by: Jungseok Lee

arm64: add early_ioremap support

2014-04-07T23:36:15+00:00

Add support for early IO or memory mappings which are needed before the normal ioremap() is usable. This also adds fixmap support for permanent fixed mappings such as that used by the earlyprintk device register region. Signed-off-by: Mark Salter Acked-by: Catalin Marinas Cc: Borislav Petkov Cc: Dave Young Cc: H. Peter Anvin Cc: Will Deacon Cc: Ingo Molnar Cc: Thomas Gleixner Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

arm64: Extend the PCI I/O space to 16MB

2014-02-26T11:16:27+00:00

The patch moves the PCI I/O space (currently at 64K) before the earlyprintk mapping and extends it to 16MB. Signed-off-by: Catalin Marinas