Huang, Ying [Wed, 30 Jan 2008 12:34:04 +0000 (13:34 +0100)]
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.
Andi Kleen [Wed, 30 Jan 2008 12:33:54 +0000 (13:33 +0100)]
x86: fix early_ioremap() on 64-bit
Fix early_ioremap() on x86-64
I had ACPI failures on several machines since a few days. Symptom
was NUMA nodes not getting detected or worse cores not getting detected.
They all came from ACPI not being able to read various of its tables. I finally
bisected it down to Jeremy's "put _PAGE_GLOBAL into PAGE_KERNEL" change.
With that the fix was fairly obvious. The problem was that early_ioremap()
didn't use a "_all" flush that would affect the global PTEs too. So
with global bits getting used everywhere now an early_ioremap would
not actually flush a mapping if something else was mapped previously
on that slot (which can happen with early_iounmap inbetween)
This patch changes all flushes in init_64.c to be __flush_tlb_all()
and fixes the problem here.
Andi Kleen [Wed, 30 Jan 2008 12:33:53 +0000 (13:33 +0100)]
x86: remove set_kernel_exec()
The SMP trampoline always runs in real mode, so making it executable
in the page tables doesn't make much sense because it executes
before page tables are set up. That was the only user of
set_kernel_exec(). Remove set_kernel_exec().
Signed-off-by: Andi Kleen <ak@suse.de> Acked-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Andi Kleen [Wed, 30 Jan 2008 12:33:52 +0000 (13:33 +0100)]
x86: c_p_a() make it more robust against use of PAT bits
Use the page table level instead of the PSE bit to check if the PTE
is for a 4K page or not. This makes the code more robust when the PAT
bit is changed because the PAT bit on 4K pages is in the same position
as the PSE bit.
Signed-off-by: Andi Kleen <ak@suse.de> Acked-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Intel recommends to first flush the TLBs and then the caches
on caching attribute changes. c_p_a() previously did it the
other way round. Reorder that.
The procedure is still not fully compliant to the Intel documentation
because Intel recommends a all CPU synchronization step between
the TLB flushes and the cache flushes.
However on all new Intel CPUs this is now meaningless anyways
because they support Self-Snoop and can skip the cache flush
step anyway.
[ mingo@elte.hu: decoupled from clflush and ported it to x86.git ]
Signed-off-by: Andi Kleen <ak@suse.de> Acked-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Andi Kleen [Wed, 30 Jan 2008 12:33:51 +0000 (13:33 +0100)]
x86: don't drop NX bit in pte modifier functions on 32-bit
The pte_* modifier functions that cleared bits dropped the NX bit on 32bit
PAE because they only worked in int, but NX is in bit 63. Fix that
by adding appropiate casts so that the arithmetic happens as long long
on PAE kernels.
I decided to just use 64bit arithmetic instead of open coding like
pte_modify() because gcc should generate good enough code for that now.
Signed-off-by: Andi Kleen <ak@suse.de> Acked-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Ingo Molnar [Wed, 30 Jan 2008 12:33:48 +0000 (13:33 +0100)]
x86: fix early_ioremap()/btmap
fix a long-standing weakness of the early-ioremap allocator: it
uses a single pgd entry for the boot mappings, and was not properly
protecting itself against crossing a 2MB (4MB) boundary.
Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Huang, Ying [Wed, 30 Jan 2008 12:33:44 +0000 (13:33 +0100)]
i386 boot: replace boot_ioremap with enhanced bt_ioremap - enhance bt_ioremap
This patch makes it possible for bt_ioremap() to be used before
paging_init(), via providing an early implementation of set_fixmap()
that can be used before paging_init().
This way boot_ioremap() can be replaced by bt_ioremap().
Siddha, Suresh B [Wed, 30 Jan 2008 12:33:43 +0000 (13:33 +0100)]
x86: set strong uncacheable where UC is really desired
Also use _PAGE_PWT for all the mappings which need uncache mapping.
Instead of existing PAT2 which is UC- (and can be overwritten by MTRRs),
we now use PAT3 which is strong uncacheable.
Andi Kleen [Wed, 30 Jan 2008 12:33:43 +0000 (13:33 +0100)]
x86: c_p_a(), add simple self test at boot
Since change_page_attr() is tricky code it is good to have some regression
test code. This patch maps and unmaps some random pages in the direct mapping
at boot and then dumps the state and does some simple sanity checks.
Add it with a CONFIG option.
Signed-off-by: Andi Kleen <ak@suse.de> Acked-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Ingo Molnar [Wed, 30 Jan 2008 12:33:43 +0000 (13:33 +0100)]
x86: return the page table level in lookup_address()
based on this patch from Andi Kleen:
| Subject: CPA: Return the page table level in lookup_address()
| From: Andi Kleen <ak@suse.de>
|
| Needed for the next change.
|
| And change all the callers.
and ported it to x86.git.
Signed-off-by: Andi Kleen <ak@suse.de> Acked-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Andi Kleen [Wed, 30 Jan 2008 12:33:42 +0000 (13:33 +0100)]
x86: clean up pte_exec
- Rename it to pte_exec() from pte_exec_kernel(). There is nothing
kernel specific in there.
- Move it into the common file because _PAGE_NX is 0 on !PAE and then
pte_exec() will be always evaluate to true.
Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
If SHARED_KERNEL_PMD is false, then we need to allocate and initialize
the kernel pmd. We can easily piggy-back this onto the existing pmd
prepopulation code.
Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
In PAE mode, an update to the pgd requires a cr3 reload to make sure
the processor notices the changes. Since this also has the
side-effect of flushing the tlb, its an expensive operation which we
want to avoid where possible.
This patch mitigates the cost of installing the initial set of pmds on
process creation by preallocating them when the pgd is allocated.
This avoids up to three tlb flushes during exec, as it creates the new
process address space while the pagetable is in active use.
The pmds will be freed as part of the normal pagetable teardown in
free_pgtables, which is called in munmap and process exit. However,
free_pgtables will only free parts of the pagetable which actually
contain mappings, so stray pmds may still be attached to the pgd at
pgd_free time. We must mop them up to prevent a memory leak.
Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Cc: Andi Kleen <ak@suse.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: H. Peter Anvin <hpa@zytor.com> Cc: William Irwin <wli@holomorphy.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Convert macros into inline functions, for better type-checking.
This patch required a little bit of fiddling with headers in order to
make __(pte|pmd)_free_tlb inline rather than macros.
asm-generic/tlb.h includes asm/pgalloc.h, though it doesn't directly
use any pgalloc definitions. I removed this include to avoid an
include cycle, but it may cause secondary compile failures by things
depending on the indirect inclusion; arch/x86/mm/hugetlbpage.c was one
such place; there may be others.
Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Some consumer ICH9 boards (such as the Abit IP35 Pro) do not provide a BIOS
option for enabling the HPET. The same ICH workaround used for 6,7,8 can be
applied to 9. Here I enable the only PCI id that was visible on my system.
I have confirmed the HPETs work both from userspace and as a clocksource for
the running kernel (2.6.24 here) after applying this patch.
Force enabled HPET at base address 0xfed00000
hpet clockevent registered
hpet0: at MMIO 0xfed00000, IRQs 2, 8, 0, 0
hpet0: 4 64-bit timers, 14318180 Hz
Signed-off-by: Alistair John Strachan <alistair@devzero.co.uk> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Ian Campbell [Wed, 30 Jan 2008 12:33:38 +0000 (13:33 +0100)]
x86: unify arch/x86/boot/compressed/misc_??.c
Remainder of unification can occur inplace.
size reports no change in arch/x86/boot/compressed/vmlinux.
Signed-off-by: Ian Campbell <ijc@hellion.org.uk> Cc: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Ian Campbell [Wed, 30 Jan 2008 12:33:38 +0000 (13:33 +0100)]
x86: unify variable names in arch/x86/boot/compressed/misc_??.c
size reports no change in arch/x86/boot/compressed/vmlinux.
Signed-off-by: Ian Campbell <ijc@hellion.org.uk> Cc: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Ian Campbell [Wed, 30 Jan 2008 12:33:38 +0000 (13:33 +0100)]
x86: unify headers in arch/x86/boot/compressed/misc_??.c
size reports no change in arch/x86/boot/compressed/vmlinux.
Signed-off-by: Ian Campbell <ijc@hellion.org.uk> Cc: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Ian Campbell [Wed, 30 Jan 2008 12:33:38 +0000 (13:33 +0100)]
x86: unify whitespace and comments in arch/x86/boot/compressed/misc_??.c
size reports no change in arch/x86/boot/compressed/vmlinux.
Signed-off-by: Ian Campbell <ijc@hellion.org.uk> Cc: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Ian Campbell [Wed, 30 Jan 2008 12:33:38 +0000 (13:33 +0100)]
x86: unify strings in arch/x86/boot/compressed/misc_??.c
There seems to be a preference for the 64 bit version so use that on 32 bit and
drop the stray leading "."
Signed-off-by: Ian Campbell <ijc@hellion.org.uk> Cc: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
size reports no change in arch/x86/boot/compressed/vmlinux.
Signed-off-by: Ian Campbell <ijc@hellion.org.uk> Cc: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Ian Campbell [Wed, 30 Jan 2008 12:33:38 +0000 (13:33 +0100)]
x86: switch to .rodata.compressed in arch/x86/boot/compressed/vmlinux_??.scr
vmlinux_64 and vmlinux_32.scr are now identical
size shows an expected movement from .text to .rodata and 4 extra bytes
of padding.
Signed-off-by: Ian Campbell <ijc@hellion.org.uk> Cc: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Ian Campbell [Wed, 30 Jan 2008 12:33:37 +0000 (13:33 +0100)]
x86: unify whitespace in arch/x86/boot/compressed/vmlinux_??.scr
size reports no change in arch/x86/boot/compressed/vmlinux.
Signed-off-by: Ian Campbell <ijc@hellion.org.uk> Cc: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Ian Campbell [Wed, 30 Jan 2008 12:33:37 +0000 (13:33 +0100)]
x86: unify whitespace and comments in arch/x86/boot/compressed/vmlinux_??.lds
size reports no change in arch/x86/boot/compressed/vmlinux.
Signed-off-by: Ian Campbell <ijc@hellion.org.uk> Cc: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Sam Ravnborg [Wed, 30 Jan 2008 12:33:37 +0000 (13:33 +0100)]
x86: fix usage of .section .sched.text in assembler code
Without this patch the linker will generate a section
named .sched.text.1 which is unexpected.
This is because the gcc generated section has "ax" but the
assembler usage of .sched.text lacks the "ax" specifier.
It would be better to have a definition we could use from
assembler code but I did not find a suitable header
file for it.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Sam Ravnborg [Wed, 30 Jan 2008 12:33:37 +0000 (13:33 +0100)]
x86: fix section mismatch warning in setup_64.c
Fix the following warning:
WARNING: arch/x86/kernel/built-in.o(.cpuinit.text+0x7a3): Section mismatch: reference to .init.text:amd_detect_cmp in 'init_amd'
The function amd_detect_cmp were annotated __init and
was only used from init_amd() which are annotated __cpuinit.
Annotate amd_detect_cmp() with _cpuinit to fix it.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Sam Ravnborg [Wed, 30 Jan 2008 12:33:37 +0000 (13:33 +0100)]
x86: fix section mismatch warning in topology.c
Fix following warning:
WARNING: arch/x86/kernel/built-in.o(__ksymtab+0x2b0): Section mismatch: reference to .cpuinit.text:arch_register_cpu in '__ksymtab_arch_register_cpu'
Annotating exported symbols are wrong.
Previously the warning were hidden by avoiding the export
in the non HOTPLUG_CPU case but the improved checks in
modpost caught it anyway.
Fix it by removing the __cpuinit annotation and rearrange the
code a bit to save one ifdef/endif pair.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Sam Ravnborg [Wed, 30 Jan 2008 12:33:37 +0000 (13:33 +0100)]
x86: fix section mismatch warning in srat_64.c
Fix the following warnings:
WARNING: arch/x86/mm/built-in.o(.text+0x1abc): Section mismatch: reference to .init.data:nodes_parsed in 'unparse_node'
WARNING: arch/x86/mm/built-in.o(.text+0x1ac6): Section mismatch: reference to .cpuinit.data:apicid_to_node in 'unparse_node'
WARNING: arch/x86/mm/built-in.o(.text+0x1ad2): Section mismatch: reference to .cpuinit.data:apicid_to_node in 'unparse_node'
unparse_node are static and only used by acpi_scan_nodes which
is already annotated __init.
So we annotate unparse_node with __init.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Sam Ravnborg [Wed, 30 Jan 2008 12:33:37 +0000 (13:33 +0100)]
x86: fix section mismatch warning in early-quirks.c
Fix following warnings:
WARNING: arch/x86/kernel/built-in.o(.text+0x139e1): Section mismatch: reference to .init.data:early_qrk in 'check_dev_quirk'
WARNING: arch/x86/kernel/built-in.o(.text+0x139f5): Section mismatch: reference to .init.data:early_qrk in 'check_dev_quirk'
WARNING: arch/x86/kernel/built-in.o(.text+0x13a0c): Section mismatch: reference to .init.data:early_qrk in 'check_dev_quirk'
WARNING: arch/x86/kernel/built-in.o(.text+0x13a12): Section mismatch: reference to .init.data:early_qrk in 'check_dev_quirk'
WARNING: arch/x86/kernel/built-in.o(.text+0x13a1a): Section mismatch: reference to .init.data:early_qrk in 'check_dev_quirk'
WARNING: arch/x86/kernel/built-in.o(.text+0x13a36): Section mismatch: reference to .init.data:early_qrk in 'check_dev_quirk'
WARNING: arch/x86/kernel/built-in.o(.text+0x13a42): Section mismatch: reference to .init.data:
Warning was caused by access to the __initdata annotated variable
from the non-annotated static function check_dev_quirk().
check_dev_quirk() were only used from a function annotated
__init so add __init annotation to check_dev_quirk() to fix it.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Sam Ravnborg [Wed, 30 Jan 2008 12:33:37 +0000 (13:33 +0100)]
x86: fix section mismatch warning in acpi/boot.c
Fix following warning:
WARNING: arch/x86/kernel/built-in.o(.text+0x10ea0): Section mismatch: reference to .cpuinit.data:num_processors in 'acpi_unmap_lsapic'
The exported function acpi_unmap_lsapic() references
the variable num_processors that is annotated __cpuinitdata.
Remove the annotation of num_processors as we never know
when an exported function are called.
And drop the needless initialsation to 0.
Warning was seen on 64 bit but similar pattern were seen
in 32 bit - so fix it up there too.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Sam Ravnborg [Wed, 30 Jan 2008 12:33:37 +0000 (13:33 +0100)]
x86: fix section mismatch warning in process_*.c
Fix the following warning:
WARNING: arch/x86/kernel/built-in.o(.text+0x3): Section mismatch: reference to .cpuinit.data:force_mwait in 'mwait_usable'
[Seen on 64 bit only but similar pattern exist on 32 bit so fix it there too]
mwait_usable() were only used by a function annotated __cpuinit
so annotate mwait_usable() with __cpuinit to fix the warning.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Sam Ravnborg [Wed, 30 Jan 2008 12:33:36 +0000 (13:33 +0100)]
x86: fix section mismatch warning in mcheck/mce_amd_64.c
Fix following warning:
WARNING: arch/x86/kernel/cpu/mcheck/built-in.o(.text+0x1584): Section mismatch: reference to .cpuinit.text:threshold_create_device in 'threshold_cpu_callback'
threshold_cpu_callback() is only used by threshold_cpu_notifier.
threshold_cpu_notifier is only used for cpu hot plug as it is registered
using register_hotcpu_notifier().
Mark them both __cpuinit to fix the warning.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
projects / linux-2.6 / log