07 Dec, 2006
29 commits
-
This patch is the meat of the PDA change. This patch makes several related
changes:1: Most significantly, %gs is now used in the kernel. This means that on
entry, the old value of %gs is saved away, and it is reloaded with
__KERNEL_PDA.2: entry.S constructs the stack in the shape of struct pt_regs, and this
is passed around the kernel so that the process's saved register
state can be accessed.Unfortunately struct pt_regs doesn't currently have space for %gs
(or %fs). This patch extends pt_regs to add space for gs (no space
is allocated for %fs, since it won't be used, and it would just
complicate the code in entry.S to work around the space).3: Because %gs is now saved on the stack like %ds, %es and the integer
registers, there are a number of places where it no longer needs to
be handled specially; namely context switch, and saving/restoring the
register state in a signal context.4: And since kernel threads run in kernel space and call normal kernel
code, they need to be created with their %gs == __KERNEL_PDA.Signed-off-by: Jeremy Fitzhardinge
Signed-off-by: Andi Kleen
Cc: Chuck Ebbert
Cc: Zachary Amsden
Cc: Jan Beulich
Cc: Andi Kleen
Signed-off-by: Andrew Morton -
When a CPU is brought up, a PDA and GDT are allocated for it. The GDT's
__KERNEL_PDA entry is pointed to the allocated PDA memory, so that all
references using this segment descriptor will refer to the PDA.This patch rearranges CPU initialization a bit, so that the GDT/PDA are set up
as early as possible in cpu_init(). Also for secondary CPUs, GDT+PDA are
preallocated and initialized so all the secondary CPU needs to do is set up
the ldt and load %gs. This will be important once smp_processor_id() and
current use the PDA.In all cases, the PDA is set up in head.S, before a CPU starts running C code,
so the PDA is always available.Signed-off-by: Jeremy Fitzhardinge
Signed-off-by: Andi Kleen
Cc: Chuck Ebbert
Cc: Zachary Amsden
Cc: Jan Beulich
Cc: Andi Kleen
Cc: James Bottomley
Cc: Matt Tolentino
Signed-off-by: Andrew Morton -
This patch has the basic definitions of struct i386_pda, and the segment
selector in the GDT.asm-i386/pda.h is more or less a direct copy of asm-x86_64/pda.h. The most
interesting difference is the use of _proxy_pda, which is used to give gcc a
model for the actual memory operations on the real pda structure. No actual
reference is ever made to _proxy_pda, so it is never defined.Signed-off-by: Jeremy Fitzhardinge
Signed-off-by: Andi Kleen
Cc: Chuck Ebbert
Cc: Zachary Amsden
Cc: Jan Beulich
Cc: Andi Kleen
Signed-off-by: Andrew Morton -
Use asm-offsets for the offsets of registers into the pt_regs struct, rather
than having hard-coded constantsI left the constants in the comments of entry.S because they're useful for
reference; the code in entry.S is very dependent on the layout of pt_regs,
even when using asm-offsets.Signed-off-by: Jeremy Fitzhardinge
Signed-off-by: Andi Kleen
Cc: Keith Owens
Signed-off-by: Andrew Morton -
This patch:
- makes ret_from_sys_call no longer global (all external users were
previously switched to use int_ret_from_sys_call)
- adjusts placement of a CFI_{REMEMBER,RESTORE}_STATE pair to better
fit logic flow
- eliminates an unnecessary pair of CFI_{REMEMBER,RESTORE}_STATE
- glues together function- and unwinder-wise the previously separate
system_call and int_ret_from_sys_call function fragmentsSigned-off-by: Jan Beulich
Signed-off-by: Andi Kleen -
Fix
BUG: using smp_processor_id() in preemptible [00000001] code:
in backtracer on preemptible debug kernels.
Cc: Andi Kleen
Signed-off-by: Andrew Morton
Signed-off-by: Andi Kleen -
- add Intel Precise-Event Based sampling (PEBS) related MSR
- add Intel Data Save (DS) Area related MSR
- add Intel Core microarchitecure performance counter MSRsSigned-off-by: stephane eranian
Signed-off-by: Andi Kleen -
Add o the x86-64 tree a bunch of MSRs related to performance
monitoring for the processors based on Intel Core microarchitecture.
It also adds some architectural MSRs for PEBS. A similar patch for i386 will
follow.changelog:
- add Intel Precise-Event Based sampling (PEBS) related MSR
- add Intel Data Save (DS) Area related MSR
- add Intel Core microarchitecure performance counter MSRsSigned-off-by: stephane eranian
Signed-off-by: Andi Kleen -
ioremap must be balanced by an iounmap and failing to do so can result
in a memory leak.Tested (compilation only):
- using allmodconfig
- making sure the files are compiling without any warning/error due to
new changesSigned-off-by: Amol Lad
Signed-off-by: Andi Kleen -
Signed-off-by: Amol Lad
Signed-off-by: Andi Kleen -
Insert the Local APIC and IO APIC(s) into the resource tree. It allows the
APIC resources to be visible within /proc/iomem. The patch also takes into
account IO APIC(s) mapped in the PCI space by deferring the insertion until
after PCI has allocated its necessary resources.Signed-off-by: Aaron Durbin
Signed-off-by: Andi Kleen
Cc: Andi Kleen
Cc: "Eric W. Biederman"
Signed-off-by: Andrew Morton -
i386 port of the sLeAZY-fpu feature. Chuck reports that this gives him a +/-
0.4% improvement on his simple benchmarkx86_64 description follows:
Right now the kernel on x86-64 has a 100% lazy fpu behavior: after *every*
context switch a trap is taken for the first FPU use to restore the FPU
context lazily. This is of course great for applications that have very
sporadic or no FPU use (since then you avoid doing the expensive save/restore
all the time). However for very frequent FPU users... you take an extra trap
every context switch.The patch below adds a simple heuristic to this code: After 5 consecutive
context switches of FPU use, the lazy behavior is disabled and the context
gets restored every context switch. If the app indeed uses the FPU, the trap
is avoided. (the chance of the 6th time slice using FPU after the previous 5
having done so are quite high obviously).After 256 switches, this is reset and lazy behavior is returned (until there
are 5 consecutive ones again). The reason for this is to give apps that do
longer bursts of FPU use still the lazy behavior back after some time.Signed-off-by: Chuck Ebbert
Signed-off-by: Arjan van de Ven
Signed-off-by: Andrew Morton
Signed-off-by: Andi Kleen -
Clean up the espfix code:
- Introduced PER_CPU() macro to be used from asm
- Introduced GET_DESC_BASE() macro to be used from asm
- Rewrote the fixup code in asm, as calling a C code with the altered %ss
appeared to be unsafe
- No longer altering the stack from a .fixup section
- 16bit per-cpu stack is no longer used, instead the stack segment base
is patched the way so that the high word of the kernel and user %esp
are the same.
- Added the limit-patching for the espfix segment. (Chuck Ebbert)[jeremy@goop.org: use the x86 scaling addressing mode rather than shifting]
Signed-off-by: Stas Sergeev
Signed-off-by: Andi Kleen
Acked-by: Zachary Amsden
Acked-by: Chuck Ebbert
Acked-by: Jan Beulich
Cc: Andi Kleen
Signed-off-by: Jeremy Fitzhardinge
Signed-off-by: Andrew Morton -
When a spinlock lockup occurs, arrange for the NMI code to emit an all-cpu
backtrace, so we get to see which CPU is holding the lock, and where.Cc: Andi Kleen
Cc: Ingo Molnar
Cc: Badari Pulavarty
Signed-off-by: Andrew Morton
Signed-off-by: Andi Kleen -
This patch removes the default_ldt[] array, as it has been unused since
iBCS stopped being supported. This means it is now possible to actually
set an empty LDT segment.In order to deal with this, the set_ldt_desc/load_LDT pair has been
replaced with a single set_ldt() operation which is responsible for both
setting up the LDT descriptor in the GDT, and reloading the LDT register.
If there are no LDT entries, the LDT register is loaded with a NULL
descriptor.Signed-off-by: Jeremy Fitzhardinge
Signed-off-by: Andi Kleen
Cc: Andi Kleen
Acked-by: Zachary Amsden
Signed-off-by: Andrew Morton -
Signed-off-by: Alexey Dobriyan
Signed-off-by: Andi Kleen
Cc: Andi Kleen
Signed-off-by: Andrew Morton -
Here is a patch (used by perfmon2) to detect the presence of the Precise Event
Based Sampling (PEBS) feature for i386. The patch also adds the cpu_has_pebs
macro.- adds X86_FEATURE_PEBS
- adds cpu_has_pebs to test for X86_FEATURE_PEBS
Signed-off-by: stephane eranian
Signed-off-by: Andi Kleen
Cc: Andi Kleen
Signed-off-by: Andrew Morton -
Here is a patch (used by perfmon2) that renames X86_FEATURE_DTES to
X86_FEATURE_DS to match Intel's documentation for the Debug Store save area on
i386. The patch also adds cpu_has_ds.- rename X86_FEATURE_DTES to X86_FEATURE_DS to match documentation
- adds cpu_has_ds to test for X86_FEATURE_DS
Signed-off-by: stephane eranian
Signed-off-by: Andi Kleen
Cc: Andi Kleen
Signed-off-by: Andrew Morton -
inline function cpu_mask_to_apicid in smp.h is duplicated with macro
in mach_apic.h.Signed-off-by: Yinghai Lu
Signed-off-by: Andi Kleen -
Here is a patch (used by perfmon2) to detect the presence of the
Precise Event Based Sampling (PEBS) feature for Intel 64-bit processors.
The patch also adds the cpu_has_pebs macro.changelog:
- adds X86_FEATURE_PEBS
- adds cpu_has_pebs to test for X86_FEATURE_PEBSSigned-off-by: stephane eranian
Signed-off-by: Andi Kleen -
Here is a patch (used by perfmon2) that renamed X86_FEATURE_DTES
to X86_FEATURE_DS to match Intel's documentation for the Debug Store
save area. The patch also adds cpu_has_ds.changelog:
- rename X86_FEATURE_DTES to X86_FEATURE_DS to match documentation
- adds cpu_has_ds to test for X86_FEATURE_DSSigned-off-by: stephane eranian
Signed-off-by: Andi Kleen -
Follows i386.
Based on patch from some folks at Google (MikeW, Edward G.?), but
completely redone by AK.Signed-off-by: Andi Kleen
-
This just got removed on x86-64, do the same on 32bit.
It always annoyed me when this ate a line of oops output pushing
interesting stuff off the screen.Signed-off-by: Dave Jones
Signed-off-by: Andi Kleen -
Fix __must_check warnings in i386/math-emu.
Signed-off-by: Randy Dunlap
Signed-off-by: Andi Kleen -
The unwinder has some extra newlines, which eat up loads of screen
space when it spews. (See https://bugzilla.redhat.com/bugzilla/attachment.cgi?id=137900
for a nasty example).warning_symbol-> and warning-> already printk a newline, so don't add one
in the strings passed to them.[AK: redone for new code]
Signed-off-by: Dave Jones
Signed-off-by: Andi Kleen -
Andrew complained about > 80 character lines in the new unwinder.
Fix that.Signed-off-by: Andi Kleen
-
Fix checks that failed to realize that values are 4-kB-unit-sized (note the
format strings in this same diff context which *do* realize the unit size,
via appended "000"!). Also fix an incorrect below-1MB area check (as
gathered from Jan Beulich's unapplied patch at
http://www.ussg.iu.edu/hypermail/linux/kernel/0411.1/1378.html ) Update
mtrr_add_page() docu to make 4-kB-sized calculation more obvious.Given several further items mentioned in Jan's patch mail, all in all MTRR
code seems surprisingly buggy, for a surprisingly long period of time (many
years). Further work/investigation would be useful.TBD Note that my patch is pretty much UNTESTED, since I can only verify that it
TBD successfully boots my machine, but I cannot test against actual buggy
TBD hardware which would require these (formerly broken) checks. Long -mm
TBD simmering would make sense, especially since these now-working checks might
TBD turn out to have adverse effects on unaffected hardware.Signed-off-by: Andreas Mohr
Signed-off-by: Andi Kleen
Acked-by: Jan Beulich
Cc: Andi Kleen
Signed-off-by: Andrew Morton -
Signed-off-by: Andi Kleen
-
Signed-off-by: Andi Kleen
06 Dec, 2006
11 commits
-
* master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: (73 commits)
[SCSI] aic79xx: Add ASC-29320LPE ids to driver
[SCSI] stex: version update
[SCSI] stex: change wait loop code
[SCSI] stex: add new device type support
[SCSI] stex: update device id info
[SCSI] stex: adjust default queue length
[SCSI] stex: add value check in hard reset routine
[SCSI] stex: fix controller_info command handling
[SCSI] stex: fix biosparam calculation
[SCSI] megaraid: fix MMIO casts
[SCSI] tgt: fix undefined flush_dcache_page() problem
[SCSI] libsas: better error handling in sas_expander.c
[SCSI] lpfc 8.1.11 : Change version number to 8.1.11
[SCSI] lpfc 8.1.11 : Misc Fixes
[SCSI] lpfc 8.1.11 : Add soft_wwnn sysfs attribute, rename soft_wwn_enable
[SCSI] lpfc 8.1.11 : Removed decoding of PCI Subsystem Id
[SCSI] lpfc 8.1.11 : Add MSI (Message Signalled Interrupts) support
[SCSI] lpfc 8.1.11 : Adjust LOG_FCP logging
[SCSI] lpfc 8.1.11 : Fix Memory leaks
[SCSI] lpfc 8.1.11 : Fix lpfc_multi_ring_support
... -
* master.kernel.org:/pub/scm/linux/kernel/git/brodo/pcmcia-2.6:
[PATCH] pcmcia: at91_cf update
[PATCH] pcmcia: fix m32r_cfc.c compilation
[PATCH] pcmcia: ds.c debug enhancements
[PATCH] pcmcia: at91_cf update
[PATCH] pcmcia: conf.ConfigBase and conf.Present consolidation
[PATCH] pcmcia: remove prod_id indirection
[PATCH] pcmcia: remove manf_id and card_id indirection
[PATCH] pcmcia: IDs for Elan serial PCMCIA devcies
[PATCH] pcmcia: allow for four multifunction subdevices
[PATCH] pcmcia: handle __copy_from_user() return value in ioctl
[PATCH] pcmcia: multifunction card handling fixes
[PATCH] pcmcia: allow shared IRQs on pd6729 sockets
[PATCH] pcmcia: start over after CIS override
[PATCH] cm4000_cs: fix return value check
[PATCH] pcmcia: yet another IDE ID
[PATCH] pcmcia: Add an id to ide-cs.c -
Simple patch to add the new PCIe version of the 29320 card.
Signed-off: Mark Salyzyn
Signed-off-by: James Bottomley -
Update version to 3.1.0.1
Signed-off-by: Ed Lin
Signed-off-by: James Bottomley -
The original wait loop may be much longer than intended time.
Use more accurate timer_after for it. Also adjust wait value to
avoid unnecessary long waiting.Signed-off-by: Ed Lin
Signed-off-by: James Bottomley -
Add support for st_vsc1 type device (st_vsc is ok because it does not
require extra buffer).Signed-off-by: Ed Lin
Signed-off-by: James Bottomley -
- add comments for various devices
- remove unused device ids(0xf350, 0x4301, 0x8301, 0x8302)
- add new device id(0xe350)
- fix vendor id of st_vsc
- modify Kconfig help infoSigned-off-by: Ed Lin
Signed-off-by: James Bottomley -
Firmware of new version may adjust default queue length. It is
backward compatible.Signed-off-by: Ed Lin
Signed-off-by: James Bottomley -
During hard reset, an all-1 value from PCI_COMMAND should be invalid.
Signed-off-by: Ed Lin
Signed-off-by: James Bottomley -
This command needs information from both firmware and driver. First copy
information from firmware to buffer, then fill in driver information.Signed-off-by: Ed Lin
Signed-off-by: James Bottomley -
Fix biosparam calculation.
Signed-off-by: Ed Lin
Signed-off-by: James Bottomley
