linux.git/Documentation/arm64/memory.txt, branch v4.2

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

arm64: Use 42-bit address space with 64K pages

2013-11-05T17:23:52+00:00

This patch expands the VA_BITS to 42 when the 64K page configuration is
enabled allowing 2TB kernel linear mapping. Linux still uses 2 levels of
page tables in this configuration with pgd now being a full page.

Signed-off-by: Catalin Marinas 
Acked-by: Will Deacon 
Acked-by: Marc Zyngier

arm64: Fix memory layout typo

2013-10-24T14:46:26+00:00

Signed-off-by: Catalin Marinas

arm64: KVM: document kernel object mappings in HYP

2013-06-12T15:42:20+00:00

HYP mode has access to some of the kernel pages. Document the
memory mapping and the offset between kernel VA and HYP VA.

Reviewed-by: Catalin Marinas 
Signed-off-by: Marc Zyngier

arm64: Add simple earlyprintk support

2013-01-22T17:51:01+00:00

This patch adds support for "earlyprintk=" parameter on the kernel
command line. The format is:

  earlyprintk=[,][,]

where  is the name of the (UART) device, e.g. "pl011",  is
the I/O address. The  aren't currently used.

The mapping of the earlyprintk device is done very early during kernel
boot and there are restrictions on which functions it can call. A
special early_io_map() function is added which creates the mapping from
the pre-defined EARLY_IOBASE to the device I/O address passed via the
kernel parameter. The pgd entry corresponding to EARLY_IOBASE is
pre-populated in head.S during kernel boot.

Only PL011 is currently supported and it is assumed that the interface
is already initialised by the boot loader before the kernel is started.

Signed-off-by: Catalin Marinas 
Acked-by: Arnd Bergmann