Commit Graph

80526 Commits

Author SHA1 Message Date
Thomas Gleixner
d7c8f21a8c x86: cpa: move flush to cpa
The set_memory_* and set_pages_* family of API's currently requires the
callers to do a global tlb flush after the function call; forgetting this is
a very nasty deathtrap. This patch moves the global tlb flush into
each of the callers

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:34:07 +01:00
Arjan van de Ven
d1028a154c x86: make various pageattr.c functions static
change_page_attr_add is only used in pageattr.c now, so we can
make this function static.
change_page_attr() isn't used anywere at all anymore; this function
is a really bad API anyway so just remove the bloat entirely.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:34:07 +01:00
Ingo Molnar
f62d0f008e x86: cpa: set_memory_notpresent()
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:34:07 +01:00
Thomas Gleixner
d806e5ee20 x86: cpa: convert ioremap to new API
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:34:06 +01:00
Thomas Gleixner
5f8681529c x86: fix ioremap API
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:34:06 +01:00
Thomas Gleixner
266b9f8727 x86: fix ioremap RAM check
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:34:06 +01:00
Thomas Gleixner
950f9d95be x86: fix the missing BIOS area check in page_is_ram
page_is_ram has a FIXME since ages, which reminds to sanity check the
BIOS area between 640k and 1M, which is sometimes falsely reported as
RAM in the e820 tables.

Implement the sanity check. Move the BIOS range defines from
pageattr.c into e820.h to avoid duplicate defines.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-01-30 13:34:06 +01:00
Thomas Gleixner
5f5192b9fe x86: move page_is_ram() function
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:34:06 +01:00
Arjan van de Ven
e1271f686a x86: deprecate change_page_attr() for drivers
With the introduction of the new API, no driver or non-archcore code needs
to use c-p-a anymore, so this patch also deprecates the EXPORT_SYMBOL of CPA
(it's a horrible API after all).

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-01-30 13:34:06 +01:00
Arjan van de Ven
6d238cc4dc x86: convert CPA users to the new set_page_ API
This patch converts various users of change_page_attr() to the new,
more intent driven set_page_*/set_memory_* API set.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-01-30 13:34:06 +01:00
Arjan van de Ven
75cbade8ea x86: a new API for drivers/etc to control cache and other page attributes
Right now, if drivers or other code want to change, say, a cache attribute of a
page, the only API they have is change_page_attr(). c-p-a is a really bad API
for this, because it forces the caller to know *ALL* the attributes he wants
for the page, not just the 1 thing he wants to change. So code that wants to
set a page uncachable, needs to be aware of the NX status as well etc etc etc.

This patch introduces a set of new APIs for this, set_pages_<attr> and
set_memory_<attr>, that offer a logical change to the user, and leave all
attributes not implied by the requested logical change alone.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-01-30 13:34:06 +01:00
Ingo Molnar
e81d5dc41b x86: cpa: move clflush_cache_range()
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:34:06 +01:00
Thomas Gleixner
e64c8aa0c5 x86: unify ioremap_32 and _64
Unify the now identical ioremap_32.c and ioremap_64.c into the
same ioremap.c file. No code changed.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-01-30 13:34:05 +01:00
Thomas Gleixner
240d3a7c47 x86: unify ioremap
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:34:05 +01:00
Thomas Gleixner
e4c1b977f0 x86: use remove_vm_are in ioremap_32 error path
When ioremap_page_range fails, then we can use remove_vm_area instead
of vunmap safely.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-01-30 13:34:05 +01:00
Thomas Gleixner
4b40fcee13 x86: __iomem annotations
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-01-30 13:34:05 +01:00
Thomas Gleixner
e9332cacd7 x86: switch to change_page_attr_addr in ioremap_32.c
Use change_page_attr_addr() instead of change_page_attr(), which
simplifies the code significantly and matches the 64bit
implementation.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-01-30 13:34:05 +01:00
Thomas Gleixner
74ff2857f0 x86: make c_p_a unconditional in ioremap
Make c_p_a unconditional for ioremap and iounmap. This ensures
complete consistency of the flags which are handed to
ioremap_page_range and the real flags in the mappings.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-01-30 13:34:05 +01:00
Thomas Gleixner
f87519e8f4 x86: introduce max_pfn_mapped
64bit uses end_pfn_map and 32bit uses max_low_pfn. There are several
files which have #ifdef'ed defines which map either to end_pfn_map or
max_low_pfn. Replace this by a universal define and clean up all the
other instances.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-01-30 13:34:05 +01:00
Thomas Gleixner
3cbd09e482 x86: cleanup ioremap includes
Get rid of the douplicate define of ISA_START/END_ADDRESS and use the
same headers in 32 and 64 bit code.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-01-30 13:34:05 +01:00
Thomas Gleixner
91eebf40b3 x86: style cleanup of ioremap code
Fix the coding style before going further.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-01-30 13:34:05 +01:00
Thomas Gleixner
1aaf74e919 x86: fix ioremap pgprot inconsistency
The pgprot flags which are handed into ioremap_page_range() are
different to those which are set in change_page_attr(). The
ioremap_page_range flags are executable, while the c_p_a flags are
not.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-01-30 13:34:05 +01:00
Thomas Gleixner
a40343497e x86: fix ioremap pgprot inconsistency
The pgprot flags which are handed into ioremap_page_range() are
different to those which are set in change_page_attr(). The
ioremap_page_range flags are executable, while the c_p_a flags are
not. Also make the mappings global (which is a NOP currently on 32bit,
although CPUs from PPRO+ onwards support it, but that's a separate
fix.)

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-01-30 13:34:04 +01:00
Arjan van de Ven
ed724be65f x86: turn the check_exec function into function that
What the check_exec() function really is trying to do is enforce certain
bits in the pgprot that are required by the x86 architecture, but that
callers might not be aware of (such as NX bit exclusion of the BIOS
area for BIOS based PCI access; it's not uncommon to ioremap the BIOS
region for various purposes and normally ioremap() memory has the NX bit
set).

This patch turns the check_exec() function into static_protections()
which also is now used to make sure the kernel text area remains non-NX
and that the .rodata section remains read-only. If the architecture
ends up requiring more such mandatory prot settings for specific areas,
this is now a reasonable place to add these.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:34:04 +01:00
Ingo Molnar
f316fe6875 x86: cpa: make self-test depend on DEBUG_KERNEL
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:34:04 +01:00
Huang, Ying
1c17f4d615 x86: ioremap_nocache fix
This patch fixes a bug of ioremap_nocache. ioremap_nocache() will call
__ioremap() with flags != 0 to do the real work, which will call
change_page_attr_addr() if phys_addr + size - 1 < (end_pfn_map << PAGE_SHIFT).
But some pages between 0 ~ end_pfn_map << PAGE_SHIFT are not mapped by
identity map, this will make change_page_attr_addr failed.

This patch is based on latest x86 git and has been tested on x86_64 platform.

Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:34:04 +01:00
Ingo Molnar
d2e626f45c x86: add PAGE_KERNEL_EXEC_NOCACHE
add PAGE_KERNEL_EXEC_NOCACHE.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:34:04 +01:00
Huang, Ying
4c881ca181 x86: fix NX bit handling in change_page_attr()
This patch fixes a bug of change_page_attr/change_page_attr_addr on
Intel i386/x86_64 CPUs.  After changing page attribute to be
executable with these functions, the page remains un-executable on
Intel i386/x86_64 CPU.  Because on Intel i386/x86_64 CPU, only if the
"NX" bits of all three level page tables are cleared (PAE is enabled),
the corresponding page is executable (refer to section 4.13.2 of Intel
64 and IA-32 Architectures Software Developer's Manual).  So, the bug
is fixed through clearing the "NX" bit of PMD when splitting the huge
PMD.

Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:34:04 +01:00
Ingo Molnar
8192206df0 x86: change cpa to pfn based
change CPA to pfn based.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:34:04 +01:00
Ingo Molnar
687c4825b6 x86: keep the BIOS area executable
keep the BIOS area executable.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:34:04 +01:00
Thomas Gleixner
30551bb3ce x86: add PG_LEVEL enum
this way PG_LEVEL_1GB will be an easy change.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:34:04 +01:00
Thomas Gleixner
0a663088cd x86: clean up lookup_address() declarations
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:34:04 +01:00
Ingo Molnar
e4b71dcf54 x86: clean up arch/x86/mm/pageattr.c
do some leftover cleanups in the now unified arch/x86/mm/pageattr.c
file.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:34:04 +01:00
Ingo Molnar
4554ab95c2 x86: re-add clflush_cache_range()
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:34:03 +01:00
Ingo Molnar
b195bc00ef x86: unify pageattr_32.c and pageattr_64.c
unify the now perfectly identical pageattr_32/64.c files - no code changed.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:34:03 +01:00
Ingo Molnar
6050be70d8 x86: prepare for pageattr.c unification
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:34:03 +01:00
Ingo Molnar
44af6c41e6 x86: backmerge 64-bit details into 32-bit pageattr.c
backmerge 64-bit details into 32-bit pageattr.c.

the pageattr_32.c and pageattr_64.c files are now identical.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:34:03 +01:00
Ingo Molnar
31a0717cbc x86: enable DEBUG_PAGEALLOC on 64-bit
enable CONFIG_DEBUG_PAGEALLOC=y on 64-bit kernels too.

preliminary testing shows that it's working fine.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:34:03 +01:00
Ingo Molnar
ace63e3743 x86: add kernel_map_pages() to 64-bit
needed for DEBUG_PAGEALLOC support and for unification.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:34:03 +01:00
Ingo Molnar
f5a50ce1bf x86: return -EINVAL in __change_page_attr(), instead of 0
careful: might change driver behavior - but this is the right
return value.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:34:03 +01:00
Ingo Molnar
674d67269e x86: clean up differences between 64-bit and 32-bit
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:34:03 +01:00
Ingo Molnar
6faa4c53b2 x86: 64-bit, add the new split_large_page() function
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:34:03 +01:00
Ingo Molnar
44136717e0 x86: 64-bit pageattr.c, prepare for unification
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:34:03 +01:00
Ingo Molnar
d9db847f29 x86: change 64-bit pageattr to use set_pte_atomic()
NOP change - same as set_pte().

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:34:02 +01:00
Ingo Molnar
0d82494ebd x86: change 64-bit __change_page_attr() to struct page
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:34:02 +01:00
Ingo Molnar
34eff1d75b x86: simplify __change_page_attr()
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:34:01 +01:00
Ingo Molnar
b65e6390fb x86: introduce native_set_pte_atomic() on 64-bit too
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:34:01 +01:00
Ingo Molnar
a5c6251488 x86: clean up and simplify 64-bit split_large_page()
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:34:00 +01:00
Ingo Molnar
5e5224a77e x86: unify header part of pageattr_64.c
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:34:00 +01:00
Ingo Molnar
d6ee09a2a0 x86: simplify pageattr_64.c
simplify pageattr_64.c.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:33:59 +01:00