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-rw-r--r--Documentation/x86/boot.txt6
-rw-r--r--Documentation/x86/pat.txt24
-rw-r--r--Documentation/x86/x86_64/boot-options.txt4
-rw-r--r--Documentation/x86/x86_64/fake-numa-for-cpusets2
-rw-r--r--Documentation/x86/x86_64/mm.txt2
5 files changed, 31 insertions, 7 deletions
diff --git a/Documentation/x86/boot.txt b/Documentation/x86/boot.txt
index 83c0033ee9e..fcdc62b3c3d 100644
--- a/Documentation/x86/boot.txt
+++ b/Documentation/x86/boot.txt
@@ -349,7 +349,7 @@ Protocol: 2.00+
3 SYSLINUX
4 EtherBoot
5 ELILO
- 7 GRuB
+ 7 GRUB
8 U-BOOT
9 Xen
A Gujin
@@ -537,8 +537,8 @@ Type: read
Offset/size: 0x248/4
Protocol: 2.08+
- If non-zero then this field contains the offset from the end of the
- real-mode code to the payload.
+ If non-zero then this field contains the offset from the beginning
+ of the protected-mode code to the payload.
The payload may be compressed. The format of both the compressed and
uncompressed data should be determined using the standard magic
diff --git a/Documentation/x86/pat.txt b/Documentation/x86/pat.txt
index c93ff5f4c0d..cf08c9fff3c 100644
--- a/Documentation/x86/pat.txt
+++ b/Documentation/x86/pat.txt
@@ -80,6 +80,30 @@ pci proc | -- | -- | WC |
| | | |
-------------------------------------------------------------------
+Advanced APIs for drivers
+-------------------------
+A. Exporting pages to users with remap_pfn_range, io_remap_pfn_range,
+vm_insert_pfn
+
+Drivers wanting to export some pages to userspace do it by using mmap
+interface and a combination of
+1) pgprot_noncached()
+2) io_remap_pfn_range() or remap_pfn_range() or vm_insert_pfn()
+
+With PAT support, a new API pgprot_writecombine is being added. So, drivers can
+continue to use the above sequence, with either pgprot_noncached() or
+pgprot_writecombine() in step 1, followed by step 2.
+
+In addition, step 2 internally tracks the region as UC or WC in memtype
+list in order to ensure no conflicting mapping.
+
+Note that this set of APIs only works with IO (non RAM) regions. If driver
+wants to export a RAM region, it has to do set_memory_uc() or set_memory_wc()
+as step 0 above and also track the usage of those pages and use set_memory_wb()
+before the page is freed to free pool.
+
+
+
Notes:
-- in the above table mean "Not suggested usage for the API". Some of the --'s
diff --git a/Documentation/x86/x86_64/boot-options.txt b/Documentation/x86/x86_64/boot-options.txt
index bc8a339c1f2..34c13040a71 100644
--- a/Documentation/x86/x86_64/boot-options.txt
+++ b/Documentation/x86/x86_64/boot-options.txt
@@ -35,7 +35,7 @@ APICs
nolapic Don't use the local APIC (alias for i386 compatibility)
- pirq=... See Documentation/i386/IO-APIC.txt
+ pirq=... See Documentation/x86/i386/IO-APIC.txt
noapictimer Don't set up the APIC timer
@@ -128,7 +128,7 @@ Non Executable Mappings
SMP
additional_cpus=NUM Allow NUM more CPUs for hotplug
- (defaults are specified by the BIOS, see Documentation/x86_64/cpu-hotplug-spec)
+ (defaults are specified by the BIOS, see Documentation/x86/x86_64/cpu-hotplug-spec)
NUMA
diff --git a/Documentation/x86/x86_64/fake-numa-for-cpusets b/Documentation/x86/x86_64/fake-numa-for-cpusets
index d1a985c5b00..33bb5665599 100644
--- a/Documentation/x86/x86_64/fake-numa-for-cpusets
+++ b/Documentation/x86/x86_64/fake-numa-for-cpusets
@@ -10,7 +10,7 @@ amount of system memory that are available to a certain class of tasks.
For more information on the features of cpusets, see Documentation/cpusets.txt.
There are a number of different configurations you can use for your needs. For
more information on the numa=fake command line option and its various ways of
-configuring fake nodes, see Documentation/x86_64/boot-options.txt.
+configuring fake nodes, see Documentation/x86/x86_64/boot-options.txt.
For the purposes of this introduction, we'll assume a very primitive NUMA
emulation setup of "numa=fake=4*512,". This will split our system memory into
diff --git a/Documentation/x86/x86_64/mm.txt b/Documentation/x86/x86_64/mm.txt
index efce7509736..29b52b14d0b 100644
--- a/Documentation/x86/x86_64/mm.txt
+++ b/Documentation/x86/x86_64/mm.txt
@@ -6,7 +6,7 @@ Virtual memory map with 4 level page tables:
0000000000000000 - 00007fffffffffff (=47 bits) user space, different per mm
hole caused by [48:63] sign extension
ffff800000000000 - ffff80ffffffffff (=40 bits) guard hole
-ffff810000000000 - ffffc0ffffffffff (=46 bits) direct mapping of all phys. memory
+ffff880000000000 - ffffc0ffffffffff (=57 TB) direct mapping of all phys. memory
ffffc10000000000 - ffffc1ffffffffff (=40 bits) hole
ffffc20000000000 - ffffe1ffffffffff (=45 bits) vmalloc/ioremap space
ffffe20000000000 - ffffe2ffffffffff (=40 bits) virtual memory map (1TB)