KVM used to handle cpuid by letting userspace decide what values to
return to the guest. We now handle cpuid completely in the kernel. We
still let userspace decide which values the guest will see by having
userspace set up the value table beforehand (this is necessary to allow
management software to set the cpu features to the least common denominator,
so that live migration can work).
The motivation for the change is that kvm kernel code can be impacted by
cpuid features, for example the x86 emulator.
Signed-off-by: Avi Kivity <avi@qumranet.com>
Currently when passing the a PIO emulation request to userspace, we
rely on userspace updating %rax (on 'in' instructions) and %rsi/%rdi/%rcx
(on string instructions). This (a) requires two extra ioctls for getting
and setting the registers and (b) is unfriendly to non-x86 archs, when
they get kvm ports.
So fix by doing the register fixups in the kernel and passing to userspace
only an abstract description of the PIO to be done.
Signed-off-by: Avi Kivity <avi@qumranet.com>
Instead of passing a 'struct kvm_run' back and forth between the kernel and
userspace, allocate a page and allow the user to mmap() it. This reduces
needless copying and makes the interface expandable by providing lots of
free space.
Signed-off-by: Avi Kivity <avi@qumranet.com>
When auditing a 32-bit guest on a 64-bit host, sign extension of the page
table directory pointer table index caused bogus addresses to be shown on
audit errors.
Fix by declaring the index unsigned.
Signed-off-by: Avi Kivity <avi@qumranet.com>
Instead of twiddling the rip registers directly, use the
skip_emulated_instruction() function to do that for us.
Signed-off-by: Dor Laor <dor.laor@qumranet.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
The hypercall code mixes up the ->cache_regs() and ->decache_regs()
callbacks, resulting in guest register corruption.
Signed-off-by: Dor Laor <dor.laor@qumranet.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
The Marvell IDE interface on my machine would hit a BUG_ON() in
lib/iomem.c because it was calling ata_pci_init_one() specifying just a
single port on the host, but that would actually end up trying to
initialize two ports, the second one with bogus information.
This fixes "ata_pci_init_one()" so that it actually passes down the
n_ports variable that it got from the low-level driver to the host
allocation routine ("ata_host_alloc_pinfo()"), which results in the ATA
layer actually having the correct port number information.
And in order to make it all work, I also needed to fix a few places that
had incorrectly hard-coded the fact that a host always had exactly two
ports (both ata_pci_init_bmdma() and ata_request_legacy_irqs() would
just always iterate over both ports).
Acked-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Almost all users of pm_ops only support mem sleep, don't check in .valid and
don't reject any others in .prepare so users can be confused if they check
/sys/power/state, especially when new states are added (these would then
result in s-t-r although they're supposed to be something different).
This patch implements a generic pm_valid_only_mem function that is then
exported for users and puts it to use in almost all existing pm_ops.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Cc: David Brownell <david-b@pacbell.net>
Acked-by: Pavel Machek <pavel@ucw.cz>
Cc: linux-pm@lists.linux-foundation.org
Cc: Len Brown <lenb@kernel.org>
Acked-by: Russell King <rmk@arm.linux.org.uk>
Cc: Greg KH <greg@kroah.com>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6: (56 commits)
ieee1394: remove garbage from Kconfig
ieee1394: more help in Kconfig
ieee1394: ohci1394: Fix mistake in printk message.
ieee1394: ohci1394: remove unnecessary rcvPhyPkt bit flipping in LinkControl register
ieee1394: ohci1394: fix cosmetic problem in error logging
ieee1394: eth1394: send async streams at S100 on 1394b buses
ieee1394: eth1394: fix error path in module_init
ieee1394: eth1394: correct return codes in hard_start_xmit
ieee1394: eth1394: hard_start_xmit is called in atomic context
ieee1394: eth1394: some conditions are unlikely
ieee1394: eth1394: clean up fragment_overlap
ieee1394: eth1394: don't use alloc_etherdev
ieee1394: eth1394: omit useless set_mac_address callback
ieee1394: eth1394: CONFIG_INET is always defined
ieee1394: eth1394: allow MTU bigger than 1500
ieee1394: unexport highlevel_host_reset
ieee1394: eth1394: contain host reset
ieee1394: eth1394: shorter error messages
ieee1394: eth1394: correct a memset argument
ieee1394: eth1394: refactor .probe and .update
...
* 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jikos/hid: (21 commits)
USB HID: don't warn on idVendor == 0
USB HID: add 'quirks' module parameter
USB HID: add support for dynamically-created quirks
USB HID: clarify static quirk handling as squirks
USB HID: encapsulate quirk handling into hid-quirks.c
USB HID: EMS USBII device needs HID_QUIRK_MULTI_INPUT
HID: update copyright and authorship macro
HID: introduce proper zeroing of unused bits in output reports
USB HID: add support for WiseGroup MP-8800 Quad Joypad
USB HID: add FF support for Logitech Force 3D Pro Joystick
USB HID: numlock quirk for dell W7658 keyboard
USB HID: Logitech MX3000 keyboard needs report descriptor quirk
USB HID: extend quirk for Logitech S510 keyboard
USB HID: usbkbd/usbmouse - handle errors when registering devices
USB HID: add QUIRK_HIDDEV for Belkin Flip KVM
HID: enable dead keys on a belkin wireless keyboard
USB HID: Thustmaster firestorm dual power v1 support
USB HID: specify explicit size for hid_blacklist.quirks
USB HID: fix retry & reset logic
USB HID: consolidate vendor/product ids
...
* master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6: (21 commits)
[IPV4] SNMP: Support OutMcastPkts and OutBcastPkts
[IPV4] SNMP: Support InMcastPkts and InBcastPkts
[IPV4] SNMP: Support InTruncatedPkts
[IPV4] SNMP: Support InNoRoutes
[SNMP]: Add definitions for {In,Out}BcastPkts
[TCP] FRTO: RFC4138 allows Nagle override when new data must be sent
[TCP] FRTO: Delay skb available check until it's mandatory
[XFRM]: Restrict upper layer information by bundle.
[TCP]: Catch skb with S+L bugs earlier
[PATCH] INET : IPV4 UDP lookups converted to a 2 pass algo
[L2TP]: Add the ability to autoload a pppox protocol module.
[SKB]: Introduce skb_queue_walk_safe()
[AF_IUCV/IUCV]: smp_call_function deadlock
[IPV6]: Fix slab corruption running ip6sic
[TCP]: Update references in two old comments
[XFRM]: Export SPD info
[IPV6]: Track device renames in snmp6.
[SCTP]: Fix sctp_getsockopt_local_addrs_old() to use local storage.
[NET]: Remove NETIF_F_INTERNAL_STATS, default to internal stats.
[NETPOLL]: Remove CONFIG_NETPOLL_RX
...
* 'for-linus' of git://git.kernel.dk/data/git/linux-2.6-block:
[PATCH] elevator: elv_list_lock does not need irq disabling
[BLOCK] Don't pin lots of memory in mempools
cfq-iosched: speedup cic rb lookup
ll_rw_blk: add io_context private pointer
cfq-iosched: get rid of cfqq hash
cfq-iosched: tighten queue request overlap condition
cfq-iosched: improve sync vs async workloads
cfq-iosched: never allow an async queue idling
cfq-iosched: get rid of ->dispatch_slice
cfq-iosched: don't pass unused preemption variable around
cfq-iosched: get rid of ->cur_rr and ->cfq_list
cfq-iosched: slice offset should take ioprio into account
[PATCH] cfq-iosched: style cleanups and comments
cfq-iosched: sort IDLE queues into the rbtree
cfq-iosched: sort RT queues into the rbtree
[PATCH] cfq-iosched: speed up rbtree handling
cfq-iosched: rework the whole round-robin list concept
cfq-iosched: minor updates
cfq-iosched: development update
cfq-iosched: improve preemption for cooperating tasks
This patch allows a name "pppox-proto-nnn" to be used in modprobe.conf
to autoload a PPPoX protocol nnn.
Signed-off-by: James Chapman <jchapman@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Currently we scale the mempool sizes depending on memory installed
in the machine, except for the bio pool itself which sits at a fixed
256 entry pre-allocation.
There's really no point in "optimizing" this OOM path, we just need
enough preallocated to make progress. A single unit is enough, lets
scale it down to 2 just to be on the safe side.
This patch saves ~150kb of pinned kernel memory on a 32-bit box.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Commit 404d5b185b changed the definition
of dev_dbg in the !DEBUG case from being a #define to being a static
inline. There was code in drivers/ps3/vuart.c to do exactly that,
which fails to compile now. This fixes it by removing the redefinition,
as the redefinition is now superfluous.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Remove option of making booke_wdt into a kernel module. This watchdog
cannot be disabled. No point being a kernel module.
Signed-off-by: Dave Jiang <djiang@mvista.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
- s/Device Drivers/Controllers/
- clarify who needs pcilynx
- don't recommend Y for raw1394; M is typically used
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Fix the "attempting to setting" message in ohci1394.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Remove the unneeded code that clears, sets and again clears the
rcvPhyPkt bit in the ohci1394 LinkControl register in ohci_initialize().
Signed-off-by: Bernhard Kauer <kauer@os.inf.tu-dresden.de>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
If posted write failed, an "Unhandled interrupt(s) 0x00000100" message
was logged by mistake.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
eth1394 did not work on buses consisting of S100B...S400B hardware
because it attempted to send GASP packets at S800.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This patch fixes some error handlings in eth1394:
- check return value of kmem_cache_create()
- cleanup resources if hpsb_register_protocol() fails
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> (whitespace)
This patch actually doesn't change anything because there was always 0
== NETDEV_TX_OK returned before.
TODO: Return NETDEV_TX_BUSY in error case and test in different error
conditions.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
RFC 2734 says: "IP-capable nodes may operate with an MTU size larger
than the default [1500 octets], but the means by which a larger MTU is
configured are beyond the scope of this document."
Allow users to set an MTU bigger than 1500.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
highlevel_host_reset no longer has any modular users.
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Call only eth1394's own host reset handler from .tx_timeout, not the
reset hooks of all other IEEE 1394 drivers.
A minor drawback of this patch is that ether1394_host_reset by timeout
is not serialized against ether1394_host_reset by bus reset.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Move common code into an extra function. This implicitly adds a missing
node_info->fifo = CSR1212_INVALID_ADDR_SPACE; to .update.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Adjust white space and line wraps. Remove unnecessary parentheses and
braces, unused macros, and some of the more redundant comments.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
There is some common code between ether1394_open and ether1394_add_host
which can be moved to a separate helper function for a slightly smaller
eth1394 driver (-160 bytes on i386.)
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Until now, ieee1394 put an IP-over-1394 capability entry into each new
host's config ROM. As soon as the controller was initialized --- i.e.
right after modprobe ohci1394 --- this entry triggered a hotplug event
which typically caused auto-loading of eth1394.
This irritated or annoyed many users and distributors. Of course they
could blacklist eth1394, but then ieee1394 wrongly advertized IP-over-
1394 capability to the FireWire bus.
Therefore
- remove the offending kernel config option
IEEE1394_CONFIG_ROM_IP1394,
- let eth1394 add the ROM entry by itself, i.e. only after eth1394 was
loaded.
This fixes http://bugzilla.kernel.org/show_bug.cgi?id=7793 .
To emulate the behaviour of older kernels, simply add the following to
to /etc/modprobe.conf:
install ohci1394 /sbin/modprobe eth1394; \
/sbin/modprobe --ignore-install ohci1394
Note, autoloading of eth1394 when an _external_ IP-over-1394 capable
device is discovered is _not_ affected by this patch.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Shrinks eth1394.ko by about 5%.
Many of these functions have only one caller and are therefore auto-
inlined anyway.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Warn if hpsb_allocate_and_register_addrspace() failed.
Unregister the address space if something else failed.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
The comment says it all. This affects only asynchronous streams sent
via raw1394; the eth1394 driver has own code and needs an own fix.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Everytime when eth1394 or a libraw1394 client updates the configuration
ROM, a certain sysfs attribute cannot be added since it already exists.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
