07 Apr, 2012
2 commits
-
Prior to 2.6.19 and as of 2.6.31, pci_enable_msix() can return a
positive value to indicate the number of vectors (less than the amount
requested) that can be set up for a given device. Returning this as an
operation value (secondary result) is fine, but (primary) operation
results are expected to be negative (error) or zero (success) according
to the protocol. With the frontend fixed to match the XenoLinux
behavior, the backend can now validly return zero (success) here,
passing the upper limit on the number of vectors in op->value.Signed-off-by: Jan Beulich
Signed-off-by: Konrad Rzeszutek Wilk -
commit b9136d207f08
xen: initialize platform-pci even if xen_emul_unplug=neverbreaks blkfront/netfront by not loading them because of
xen_platform_pci_unplug=0 and it is never set for PV guest.Signed-off-by: Andrew Jones
Signed-off-by: Igor Mammedov
Signed-off-by: Konrad Rzeszutek Wilk
24 Mar, 2012
1 commit
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The functions: "acpi_processor_*" sound like they depend on CONFIG_ACPI_PROCESSOR
but in reality they are exposed when CONFIG_CPU_FREQ=[y|m]. As such
update the Kconfig to have this dependency and fix compile issues:ERROR: "acpi_processor_unregister_performance" [drivers/xen/xen-acpi-processor.ko] undefined!
ERROR: "acpi_processor_notify_smm" [drivers/xen/xen-acpi-processor.ko] undefined!
ERROR: "acpi_processor_register_performance" [drivers/xen/xen-acpi-processor.ko] undefined!
ERROR: "acpi_processor_preregister_performance" [drivers/xen/xen-acpi-processor.ko] undefined!Note: We still need the CONFIG_ACPI
Reported-by: Randy Dunlap
Signed-off-by: Konrad Rzeszutek Wilk
22 Mar, 2012
2 commits
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When xen_emul_unplug=never is specified on kernel command line
reading files from /sys/hypervisor is broken (returns -EBUSY).
It is caused by xen_bus dependency on platform-pci and
platform-pci isn't initialized when xen_emul_unplug=never is
specified.Fix it by allowing platform-pci to ignore xen_emul_unplug=never,
and do not intialize xen_[blk|net]front instead.Signed-off-by: Igor Mammedov
Acked-by: Stefano Stabellini
Signed-off-by: Konrad Rzeszutek Wilk -
When booting the kernel under machines that do not have P-states
we would end up with:------------[ cut here ]------------
WARNING: at drivers/xen/xen-acpi-processor.c:504
xen_acpi_processor_init+0x286/0
x2e0()
Hardware name: ProLiant BL460c G6
Modules linked in:
Pid: 1, comm: swapper Not tainted 2.6.39-200.0.3.el5uek #1
Call Trace:
[] ? xen_acpi_processor_init+0x286/0x2e0
[] warn_slowpath_common+0x90/0xc0
[] ? check_acpi_ids+0x1e0/0x1e0
[] warn_slowpath_null+0x1a/0x20
[] xen_acpi_processor_init+0x286/0x2e0
[] ? check_acpi_ids+0x1e0/0x1e0
[] do_one_initcall+0xe8/0x130.. snip..
Which is OK - the machines do not have P-states, so we fail to register
to process the _PXX states. But there is no need to WARN the user
of it.Oracle BZ# 13871288
Signed-off-by: Konrad Rzeszutek Wilk
21 Mar, 2012
4 commits
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Use 'bool' for boolean variables. Do proper section placement.
Eliminate an unnecessary export.Signed-off-by: Jan Beulich
Acked-by: Dan Magenheimer
Signed-off-by: Konrad Rzeszutek Wilk -
The pirq_eoi_map is a bitmap offered by Xen to check which pirqs need to
be EOI'd without having to issue an hypercall every time.
We use PHYSDEVOP_pirq_eoi_gmfn_v2 to map the bitmap, then if we
succeed we use pirq_eoi_map to check whether pirqs need eoi.Changes in v3:
- explicitly use PHYSDEVOP_pirq_eoi_gmfn_v2 rather than
PHYSDEVOP_pirq_eoi_gmfn;- introduce pirq_check_eoi_map, a function to check if a pirq needs an
eoi using the map;-rename pirq_needs_eoi into pirq_needs_eoi_flag;
- introduce a function pointer called pirq_needs_eoi that is going to be
set to the right implementation depending on the availability of
PHYSDEVOP_pirq_eoi_gmfn_v2.Signed-off-by: Stefano Stabellini
Signed-off-by: Konrad Rzeszutek Wilk -
With patch "xen/cpufreq: Disable the cpu frequency scaling drivers
from loading." we do not have to worry about said drivers loading
themselves before the xen-acpi-processor driver. Hence we can remove
the default selection (=y if CPU frequency drivers were built-in, or
=m if CPU frequency drivers were built as modules), and just
select =m for the default case.Signed-off-by: Konrad Rzeszutek Wilk
-
useful for disabling cpufreq altogether. The cpu frequency
scaling drivers and cpu frequency governors will fail to register.Signed-off-by: Konrad Rzeszutek Wilk
Signed-off-by: Dave Jones
16 Mar, 2012
1 commit
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PV-on-HVM guests may want to use the xen keyboard/mouse frontend, but
they don't use the xen frame buffer frontend. For this case it doesn't
make much sense for INPUT_XEN_KBDDEV_FRONTEND to depend on
XEN_FBDEV_FRONTEND. The opposite direction always makes more sense, i.e.
if you're using xenfb, then you'll want xenkbd. Switch the dependencies.Acked-by: Dmitry Torokhov
Signed-off-by: Andrew Jones
Signed-off-by: Konrad Rzeszutek Wilk
15 Mar, 2012
2 commits
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This driver solves three problems:
1). Parse and upload ACPI0007 (or PROCESSOR_TYPE) information to the
hypervisor - aka P-states (cpufreq data).
2). Upload the the Cx state information (cpuidle data).
3). Inhibit CPU frequency scaling drivers from loading.The reason for wanting to solve 1) and 2) is such that the Xen hypervisor
is the only one that knows the CPU usage of different guests and can
make the proper decision of when to put CPUs and packages in proper states.
Unfortunately the hypervisor has no support to parse ACPI DSDT tables, hence it
needs help from the initial domain to provide this information. The reason
for 3) is that we do not want the initial domain to change P-states while the
hypervisor is doing it as well - it causes rather some funny cases of P-states
transitions.For this to work, the driver parses the Power Management data and uploads said
information to the Xen hypervisor. It also calls acpi_processor_notify_smm()
to inhibit the other CPU frequency scaling drivers from being loaded.Everything revolves around the 'struct acpi_processor' structure which
gets updated during the bootup cycle in different stages. At the startup, when
the ACPI parser starts, the C-state information is processed (processor_idle)
and saved in said structure as 'power' element. Later on, the CPU frequency
scaling driver (powernow-k8 or acpi_cpufreq), would call the the
acpi_processor_* (processor_perflib functions) to parse P-states information
and populate in the said structure the 'performance' element.Since we do not want the CPU frequency scaling drivers from loading
we have to call the acpi_processor_* functions to parse the P-states and
call "acpi_processor_notify_smm" to stop them from loading.There is also one oddity in this driver which is that under Xen, the
physical online CPU count can be different from the virtual online CPU count.
Meaning that the macros 'for_[online|possible]_cpu' would process only
up to virtual online CPU count. We on the other hand want to process
the full amount of physical CPUs. For that, the driver checks if the ACPI IDs
count is different from the APIC ID count - which can happen if the user
choose to use dom0_max_vcpu argument. In such a case a backup of the PM
structure is used and uploaded to the hypervisor.[v1-v2: Initial RFC implementations that were posted]
[v3: Changed the name to passthru suggested by Pasi Kärkkäinen ]
[v4: Added vCPU != pCPU support - aka dom0_max_vcpus support]
[v5: Cleaned up the driver, fix bug under Athlon XP]
[v6: Changed the driver to a CPU frequency governor]
[v7: Jan Beulich suggestion to make it a cpufreq scaling driver
made me rework it as driver that inhibits cpufreq scaling driver]
[v8: Per Jan's review comments, fixed up the driver]
[v9: Allow to continue even if acpi_processor_preregister_perf.. fails]
Signed-off-by: Konrad Rzeszutek Wilk -
The functions these get passed to have been taking pointers to const
since at least 2.6.16.Signed-off-by: Jan Beulich
Signed-off-by: Konrad Rzeszutek Wilk
14 Mar, 2012
5 commits
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Unfortunately xend creates a bogus console/0 frotend/backend entry pair
on xenstore that console backends cannot properly cope with.
Any guest behavior that is not completely ignoring console/0 is going
to either cause problems with xenconsoled or qemu.
Returning 0 or -ENODEV from xencons_probe is not enough because it is
going to cause the frontend state to become 4 or 6 respectively.
The best possible thing we can do here is just ignore the entry from
xenbus_probe_frontend.Signed-off-by: Stefano Stabellini
Signed-off-by: Konrad Rzeszutek Wilk -
Introduce a new config option HVC_XEN_FRONTEND to enable/disable the
xenbus based pv console frontend.Signed-off-by: Stefano Stabellini
Signed-off-by: Konrad Rzeszutek Wilk -
This patch implements support for multiple consoles:
consoles other than the first one are setup using the traditional xenbus
and grant-table based mechanism.
We use a list to keep track of the allocated consoles, we don't
expect too many of them anyway.Changes in v3:
- call hvc_remove before removing the console from xenconsoles;
- do not lock xencons_lock twice in the destruction path;
- use the DEFINE_XENBUS_DRIVER macro.Signed-off-by: Stefano Stabellini
Signed-off-by: Konrad Rzeszutek Wilk -
Signed-off-by: Stefano Stabellini
Signed-off-by: Konrad Rzeszutek Wilk -
The individual drivers' remove functions could legitimately attempt to
access this information (for logging messages if nothing else). Note
that I did not in fact observe a problem anywhere, but I came across
this while looking into the reasons for what turned out to need the
fix at https://lkml.org/lkml/2012/3/5/336 to vsprintf().Signed-off-by: Jan Beulich
Signed-off-by: Konrad Rzeszutek Wilk
27 Feb, 2012
1 commit
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- casting pointers to integer types of different size is being warned on
- an uninitialized variable warning occurred on certain gcc versionsSigned-off-by: Jan Beulich
Signed-off-by: Konrad Rzeszutek Wilk
13 Jan, 2012
2 commits
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We use the __pci_reset_function_locked to perform the action.
Also on attaching ("bind") and detaching ("unbind") we save and
restore the configuration states. When the device is disconnected
from a guest we use the "pci_reset_function" to also reset the
device before being passed to another guest.Signed-off-by: Konrad Rzeszutek Wilk
-
The use case of this is when a driver wants to call FLR when a device
is attached to it using the SysFS "bind" or "unbind" functionality.The call chain when a user does "bind" looks as so:
echo "0000:01.07.0" > /sys/bus/pci/drivers/XXXX/bind
and ends up calling:
driver_bind:
device_lock(dev);
12 Jan, 2012
3 commits
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* 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci: (80 commits)
x86/PCI: Expand the x86_msi_ops to have a restore MSIs.
PCI: Increase resource array mask bit size in pcim_iomap_regions()
PCI: DEVICE_COUNT_RESOURCE should be equal to PCI_NUM_RESOURCES
PCI: pci_ids: add device ids for STA2X11 device (aka ConneXT)
PNP: work around Dell 1536/1546 BIOS MMCONFIG bug that breaks USB
x86/PCI: amd: factor out MMCONFIG discovery
PCI: Enable ATS at the device state restore
PCI: msi: fix imbalanced refcount of msi irq sysfs objects
PCI: kconfig: English typo in pci/pcie/Kconfig
PCI/PM/Runtime: make PCI traces quieter
PCI: remove pci_create_bus()
xtensa/PCI: convert to pci_scan_root_bus() for correct root bus resources
x86/PCI: convert to pci_create_root_bus() and pci_scan_root_bus()
x86/PCI: use pci_scan_bus() instead of pci_scan_bus_parented()
x86/PCI: read Broadcom CNB20LE host bridge info before PCI scan
sparc32, leon/PCI: convert to pci_scan_root_bus() for correct root bus resources
sparc/PCI: convert to pci_create_root_bus()
sh/PCI: convert to pci_scan_root_bus() for correct root bus resources
powerpc/PCI: convert to pci_create_root_bus()
powerpc/PCI: split PHB part out of pcibios_map_io_space()
...Fix up conflicts in drivers/pci/msi.c and include/linux/pci_regs.h due
to the same patches being applied in other branches. -
frv, h8300, m68k, microblaze, openrisc, score, um and xtensa currently
do not register a CPU device. Add the config option GENERIC_CPU_DEVICES
which causes a generic CPU device to be registered for each present CPU,
and make all these architectures select it.Richard Weinberger covered UML and suggested using
per_cpu.Signed-off-by: Ben Hutchings
Signed-off-by: Linus Torvalds -
cpu_dev_init() is only called from driver_init(), which does not check
its return value. Therefore make cpu_dev_init() return void.We must register the CPU subsystem, so panic if this fails.
If sched_create_sysfs_power_savings_entries() fails, the damage is
contained, so ignore this (as before).Signed-off-by: Ben Hutchings
Signed-off-by: Linus Torvalds
11 Jan, 2012
17 commits
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* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (54 commits)
crypto: gf128mul - remove leftover "(EXPERIMENTAL)" in Kconfig
crypto: serpent-sse2 - remove unneeded LRW/XTS #ifdefs
crypto: serpent-sse2 - select LRW and XTS
crypto: twofish-x86_64-3way - remove unneeded LRW/XTS #ifdefs
crypto: twofish-x86_64-3way - select LRW and XTS
crypto: xts - remove dependency on EXPERIMENTAL
crypto: lrw - remove dependency on EXPERIMENTAL
crypto: picoxcell - fix boolean and / or confusion
crypto: caam - remove DECO access initialization code
crypto: caam - fix polarity of "propagate error" logic
crypto: caam - more desc.h cleanups
crypto: caam - desc.h - convert spaces to tabs
crypto: talitos - convert talitos_error to struct device
crypto: talitos - remove NO_IRQ references
crypto: talitos - fix bad kfree
crypto: convert drivers/crypto/* to use module_platform_driver()
char: hw_random: convert drivers/char/hw_random/* to use module_platform_driver()
crypto: serpent-sse2 - should select CRYPTO_CRYPTD
crypto: serpent - rename serpent.c to serpent_generic.c
crypto: serpent - cleanup checkpatch errors and warnings
... -
* 'for-linus' of git://selinuxproject.org/~jmorris/linux-security: (32 commits)
ima: fix invalid memory reference
ima: free duplicate measurement memory
security: update security_file_mmap() docs
selinux: Casting (void *) value returned by kmalloc is useless
apparmor: fix module parameter handling
Security: tomoyo: add .gitignore file
tomoyo: add missing rcu_dereference()
apparmor: add missing rcu_dereference()
evm: prevent racing during tfm allocation
evm: key must be set once during initialization
mpi/mpi-mpow: NULL dereference on allocation failure
digsig: build dependency fix
KEYS: Give key types their own lockdep class for key->sem
TPM: fix transmit_cmd error logic
TPM: NSC and TIS drivers X86 dependency fix
TPM: Export wait_for_stat for other vendor specific drivers
TPM: Use vendor specific function for status probe
tpm_tis: add delay after aborting command
tpm_tis: Check return code from getting timeouts/durations
tpm: Introduce function to poll for result of self test
...Fix up trivial conflict in lib/Makefile due to addition of CONFIG_MPI
and SIGSIG next to CONFIG_DQL addition. -
* 'next' of git://git.monstr.eu/linux-2.6-microblaze:
microblaze: Wire-up new system calls
microblaze: Remove NO_IRQ from architecture
input: xilinx_ps2: Don't use NO_IRQ
block: xsysace: Don't use NO_IRQ
microblaze: Trivial asm fix
microblaze: Fix debug message in module
microblaze: Remove eprintk macro
microblaze: Send CR before LF for early console
microblaze: Change NO_IRQ to 0
microblaze: Use irq_of_parse_and_map for timer
microblaze: intc: Change variable name
microblaze: Use of_find_compatible_node for timer and intc
microblaze: Add __cmpdi2
microblaze: Synchronize __pa __va macros -
* 'unicore32' of git://github.com/gxt/linux:
rtc-puv3: solve section mismatch in rtc-puv3.c
rtc-puv3: using module_platform_driver()
i2c-puv3: using module_platform_driver()
rtc-puv3: irq: remove IRQF_DISABLED
unicore32: Remove IRQF_DISABLED
unicore32: Use set_current_blocked()
unicore32: add ioremap_nocache definition
unicore32: delete specified xlate_dev_mem_ptr
of: add include asm/setup.h in drivers/of/fdt.c
unicore32: standardize /proc/iomem "Kernel code" name -
Andrew elucidates:
- First installmeant of MM. We have a HUGE number of MM patches this
time. It's crazy.
- MAINTAINERS updates
- backlight updates
- leds
- checkpatch updates
- misc ELF stuff
- rtc updates
- reiserfs
- procfs
- some misc other bits* akpm: (124 commits)
user namespace: make signal.c respect user namespaces
workqueue: make alloc_workqueue() take printf fmt and args for name
procfs: add hidepid= and gid= mount options
procfs: parse mount options
procfs: introduce the /proc//map_files/ directory
procfs: make proc_get_link to use dentry instead of inode
signal: add block_sigmask() for adding sigmask to current->blocked
sparc: make SA_NOMASK a synonym of SA_NODEFER
reiserfs: don't lock root inode searching
reiserfs: don't lock journal_init()
reiserfs: delay reiserfs lock until journal initialization
reiserfs: delete comments referring to the BKL
drivers/rtc/interface.c: fix alarm rollover when day or month is out-of-range
drivers/rtc/rtc-twl.c: add DT support for RTC inside twl4030/twl6030
drivers/rtc/: remove redundant spi driver bus initialization
drivers/rtc/rtc-jz4740.c: make jz4740_rtc_driver static
drivers/rtc/rtc-mc13xxx.c: make mc13xxx_rtc_idtable static
rtc: convert drivers/rtc/* to use module_platform_driver()
drivers/rtc/rtc-wm831x.c: convert to devm_kzalloc()
drivers/rtc/rtc-wm831x.c: remove unused period IRQ handler
... -
Commit f44f7f96a20a ("RTC: Initialize kernel state from RTC") introduced a
potential infinite loop. If an alarm time contains a wildcard month and
an invalid day (> 31), or a wildcard year and an invalid month (>= 12),
the loop searching for the next matching date will never terminate. Treat
the invalid values as wildcards.Fixes ,
Reported-by: leo weppelman
Reported-by: "P. van Gaans"
Signed-off-by: Ben Hutchings
Signed-off-by: Jonathan Nieder
Cc: Mark Brown
Cc: Marcelo Roberto Jimenez
Cc: Thomas Gleixner
Cc: John Stultz
Acked-by: Alessandro Zummo
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add the DT support for the TI rtc-twl present in the twl4030 and twl6030
devices.Signed-off-by: Benoit Cousson
Acked-by: Alessandro Zummo
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
In ancient times it was necessary to manually initialize the bus field of
an spi_driver to spi_bus_type. These days this is done in
spi_driver_register(), so we can drop the manual assignment.The patch was generated using the following coccinelle semantic patch:
//
@@
identifier _driver;
@@
struct spi_driver _driver = {
.driver = {
- .bus = &spi_bus_type,
},
};
//Signed-off-by: Lars-Peter Clausen
Cc: John Stultz
Cc: Alessandro Zummo
Cc: Grant Likely
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by: Axel Lin
Cc: Lars-Peter Clausen
Cc: Alessandro Zummo
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by: Axel Lin
Acked-by: Uwe Kleine-König
Cc: Alessandro Zummo
Acked-by: Jean-Christophe PLAGNIOL-VILLARD
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch converts the drivers in drivers/rtc/* to use the
module_platform_driver() macro which makes the code smaller and a bit
simpler.Signed-off-by: Axel Lin
Acked-by: Mark Brown
Acked-by: Mike Frysinger
Acked-by: Guan Xuetao
Acked-by: Linus Walleij
Acked-by: Haojian Zhuang
Cc: Alessandro Zummo
Cc: Srinidhi Kasagar
Cc: Lars-Peter Clausen
Cc: Ben Dooks
Cc: John Stultz
Acked-by: Jean-Christophe PLAGNIOL-VILLARD
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Marginally less code and eliminate the possibility of memory leaks.
Signed-off-by: Mark Brown
Acked-by: Jean-Christophe PLAGNIOL-VILLARD
Cc: Alessandro Zummo
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Due to changes in the RTC core the period interrupt is now unused so
delete the code managing it.Signed-off-by: Mark Brown
Cc: Alessandro Zummo
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The rtc_calibration attribute allows user-space to get and set the
AB8500's RtcCalibration register. The AB8500 will then use the value in
this register to compensate for RTC drift every 60 seconds.[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Mark Godfrey
Signed-off-by: Linus Walleij
Acked-by: Jean-Christophe PLAGNIOL-VILLARD
Cc: Alessandro Zummo
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The resolution of msleep is related to HZ, so with HZ set to 100 any
msleep of less than 10ms will become ~10ms. This is not what we want.
Use the hrtimer-based usleep_range() and allow for some slack in the
non-critical path so we have more control of what is happening here.Signed-off-by: Linus Walleij
Cc: Jonas Aaberg
Cc: Alessandro Zummo
Cc: Jean-Christophe PLAGNIOL-VILLARD
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Set can_wake flag so wakealarm property is visible in sysfs.
Signed-off-by: Andrew Lynn
Reviewed-by: Jonas ABERG
Signed-off-by: Linus Walleij
Cc: Alessandro Zummo
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
We want this driver to be able to wake up the system.
Signed-off-by: Robert Marklund
Signed-off-by: Linus Walleij
Cc: Alessandro Zummo
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
