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2011-07-12KVM: nVMX: Allow setting the VMXE bit in CR4Nadav Har'El
This patch allows the guest to enable the VMXE bit in CR4, which is a prerequisite to running VMXON. Whether to allow setting the VMXE bit now depends on the architecture (svm or vmx), so its checking has moved to kvm_x86_ops->set_cr4(). This function now returns an int: If kvm_x86_ops->set_cr4() returns 1, __kvm_set_cr4() will also return 1, and this will cause kvm_set_cr4() will throw a #GP. Turning on the VMXE bit is allowed only when the nested VMX feature is enabled, and turning it off is forbidden after a vmxon. Signed-off-by: Nadav Har'El <nyh@il.ibm.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-07-12KVM: nVMX: Implement VMXON and VMXOFFNadav Har'El
This patch allows a guest to use the VMXON and VMXOFF instructions, and emulates them accordingly. Basically this amounts to checking some prerequisites, and then remembering whether the guest has enabled or disabled VMX operation. Signed-off-by: Nadav Har'El <nyh@il.ibm.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-07-12KVM: nVMX: Add "nested" module option to kvm_intelNadav Har'El
This patch adds to kvm_intel a module option "nested". This option controls whether the guest can use VMX instructions, i.e., whether we allow nested virtualization. A similar, but separate, option already exists for the SVM module. This option currently defaults to 0, meaning that nested VMX must be explicitly enabled by giving nested=1. When nested VMX matures, the default should probably be changed to enable nested VMX by default - just like nested SVM is currently enabled by default. Signed-off-by: Nadav Har'El <nyh@il.ibm.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-07-12KVM: x86 emulator: Avoid clearing the whole decode_cacheTakuya Yoshikawa
During tracing the emulator, we noticed that init_emulate_ctxt() sometimes took a bit longer time than we expected. This patch is for mitigating the problem by some degree. By looking into the function, we soon notice that it clears the whole decode_cache whose size is about 2.5K bytes now. Furthermore, most of the bytes are taken for the two read_cache arrays, which are used only by a few instructions. Considering the fact that we are not assuming the cache arrays have been cleared when we store actual data, we do not need to clear the arrays: 2K bytes elimination. In addition, we can avoid clearing the fetch_cache and regs arrays. This patch changes the initialization not to clear the arrays. On our 64-bit host, init_emulate_ctxt() becomes 0.3 to 0.5us faster with this patch applied. Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Cc: Gleb Natapov <gleb@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-07-12KVM: x86 emulator: Clean up init_emulate_ctxt()Takuya Yoshikawa
Use a local pointer to the emulate_ctxt for simplicity. Then, arrange the hard-to-read mode selection lines neatly. Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-07-12KVM: Clean up error handling during VCPU creationJan Kiszka
So far kvm_arch_vcpu_setup is responsible for freeing the vcpu struct if it fails. Move this confusing resonsibility back into the hands of kvm_vm_ioctl_create_vcpu. Only kvm_arch_vcpu_setup of x86 is affected, all other archs cannot fail. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-07-12KVM: VMX: Keep list of loaded VMCSs, instead of vcpusNadav Har'El
In VMX, before we bring down a CPU we must VMCLEAR all VMCSs loaded on it because (at least in theory) the processor might not have written all of its content back to memory. Since a patch from June 26, 2008, this is done using a per-cpu "vcpus_on_cpu" linked list of vcpus loaded on each CPU. The problem is that with nested VMX, we no longer have the concept of a vcpu being loaded on a cpu: A vcpu has multiple VMCSs (one for L1, a pool for L2s), and each of those may be have been last loaded on a different cpu. So instead of linking the vcpus, we link the VMCSs, using a new structure loaded_vmcs. This structure contains the VMCS, and the information pertaining to its loading on a specific cpu (namely, the cpu number, and whether it was already launched on this cpu once). In nested we will also use the same structure to hold L2 VMCSs, and vmx->loaded_vmcs is a pointer to the currently active VMCS. Signed-off-by: Nadav Har'El <nyh@il.ibm.com> Acked-by: Acked-by: Kevin Tian <kevin.tian@intel.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-07-12KVM: Sanitize cpuidAvi Kivity
Instead of blacklisting known-unsupported cpuid leaves, whitelist known- supported leaves. This is more conservative and prevents us from reporting features we don't support. Also whitelist a few more leaves while at it. Signed-off-by: Avi Kivity <avi@redhat.com> Acked-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-07-12KVM: MMU: cleanup for dropping parent pteXiao Guangrong
Introduce drop_parent_pte to remove the rmap of parent pte and clear parent pte Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-07-12KVM: MMU: cleanup for kvm_mmu_page_unlink_childrenXiao Guangrong
Cleanup the same operation between kvm_mmu_page_unlink_children and mmu_pte_write_zap_pte Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-07-12KVM: MMU: remove the arithmetic of parent pte rmapXiao Guangrong
Parent pte rmap and page rmap are very similar, so use the same arithmetic for them Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-07-12KVM: MMU: abstract the operation of rmapXiao Guangrong
Abstract the operation of rmap to spte_list, then we can use it for the reverse mapping of parent pte in the later patch Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-07-12KVM: fix uninitialized warningXiao Guangrong
Fix: warning: ‘cs_sel’ may be used uninitialized in this function warning: ‘ss_sel’ may be used uninitialized in this function Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-07-12KVM: use __copy_to_user/__clear_user to write guest pageXiao Guangrong
Simply use __copy_to_user/__clear_user to write guest page since we have already verified the user address when the memslot is set Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-07-12KVM: MMU: optimize pte write path if don't have protected spXiao Guangrong
Simply return from kvm_mmu_pte_write path if no shadow page is write-protected, then we can avoid to walk all shadow pages and hold mmu-lock Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-07-12KVM: VMX: always_inline VMREADsAvi Kivity
vmcs_readl() and friends are really short, but gcc thinks they are long because of the out-of-line exception handlers. Mark them always_inline to clear the misunderstanding. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-07-12KVM: VMX: Move VMREAD cleanup to exception handlerAvi Kivity
We clean up a failed VMREAD by clearing the output register. Do it in the exception handler instead of unconditionally. This is worthwhile since there are more than a hundred call sites. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-07-12KVM: x86 emulator: Stop passing ctxt->ops as arg of emul functionsTakuya Yoshikawa
Dereference it in the actual users. This not only cleans up the emulator but also makes it easy to convert the old emulation functions to the new em_xxx() form later. Note: Remove some inline keywords to let the compiler decide inlining. Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-07-12KVM: x86 emulator: Stop passing ctxt->ops as arg of decode helpersTakuya Yoshikawa
Dereference it in the actual users: only do_insn_fetch_byte(). This is consistent with the way __linearize() dereferences it. Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-07-12KVM: x86 emulator: Place insn_fetch helpers togetherTakuya Yoshikawa
The two macros need special care to use: Assume rc, ctxt, ops and done exist outside of them. Can goto outside. Considering the fact that these are used only in decode functions, moving these right after do_insn_fetch() seems to be a right thing to improve the readability. We also rename do_fetch_insn_byte() to do_insn_fetch_byte() to be consistent. Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-07-12KVM: Document KVM_GET_LAPIC, KVM_SET_LAPIC ioctlAvi Kivity
Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-07-12HID: fix horizontal wheel for ms comfort mouse 4500Ari Savolainen
Microsoft comfort mouse 4500 report descriptor contains duplicate usages for horizontal wheel. This patch fixes the wrong mapping caused by that. Signed-off-by: Ari Savolainen <ari.m.savolainen@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2011-07-12GFS2: Fix race during filesystem mountSteven Whitehouse
There is a potential race during filesystem mounting which has recently been reported. It occurs when the userland gfs_controld is able to process requests fast enough that it tries to use the sysfs interface before the lock module is properly initialised. This is a pretty unusual case as normally the lock module initialisation is very quick compared with gfs_controld. This patch adds an interruptible completion which is used to ensure that userland will wait for the initialisation of the lock module to complete. There are other potential solutions to this problem, but this is the quickest at this stage and has been tested both with and without mount.gfs2 present in the system. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com> Reported-by: David Booher <dbooher@adams.net>
2011-07-12GFS2: force a log flush when invalidating the rindex glockBenjamin Marzinski
Right now, there is nothing that forces the log to get flushed when a node drops its rindex glock so that another node can grow the filesystem. If the log doesn't get flushed, GFS2 can corrupt the sd_log_le_rg list in the following way. A node puts an rgd on the list in rg_lo_add(), and then the rindex glock is dropped so the other node can grow the filesystem. When the node reacquires the rindex glock, that rgd gets deleted in clear_rgrpdi() before ever being removed from the list by gfs2_log_flush(). This code simply forces a log flush when the rindex glock is invalidated, solving the problem. Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2011-07-12fixlet: Remove fs_excl from struct task.Justin TerAvest
fs_excl is a poor man's priority inheritance for filesystems to hint to the block layer that an operation is important. It was never clearly specified, not widely adopted, and will not prevent starvation in many cases (like across cgroups). fs_excl was introduced with the time sliced CFQ IO scheduler, to indicate when a process held FS exclusive resources and thus needed a boost. It doesn't cover all file systems, and it was never fully complete. Lets kill it. Signed-off-by: Justin TerAvest <teravest@google.com> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2011-07-12ALSA: Use krealloc() in possible placesTakashi Iwai
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2011-07-12drm/radeon/kms: fix typo in read_disabled vbios codeAlex Deucher
BUS_CNTL reg and bits moved between pre-PCIE and PCIE asics. Signed-off-by: Alex Deucher <alexdeucher@gmail.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
2011-07-12drm/radeon/kms: use correct BUS_CNTL reg on rs600Alex Deucher
BUS_CNTL is at 0x30 on rs600, not 0x4c. Signed-off-by: Alex Deucher <alexdeucher@gmail.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
2011-07-12drm/radeon/kms: fix backend map typo on juniperAlex Deucher
Don't enable backends that don't exist. Signed-off-by: Alex Deucher <alexdeucher@gmail.com> Cc: stable@kernel.org Signed-off-by: Dave Airlie <airlied@redhat.com>
2011-07-12drm/radeon/kms: fix regression in hotplugAlex Deucher
Skip connectors that do not have an HPD pin. Should fix: https://bugs.freedesktop.org/show_bug.cgi?id=39027 Signed-off-by: Alex Deucher <alexdeucher@gmail.com> Tested-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
2011-07-12ALSA: hda - Expose secret DAC-AA connection of some VIA codecsTakashi Iwai
VT1718S and co have a secret connection from DAC to AA-mix, which doesn't appear in the connection list obtained from the h/w. Currently the driver fixes the connection index locally at init, but now we can expose it statically via snd_hda_override_connections() so that this conection can be checked better by the parser in future. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2011-07-12ALSA: hda - Always read raw connections for proc outputTakashi Iwai
In the codec proc outputs, read the raw connections instead of the cached connection list, i.e. proc files contain only raw values. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2011-07-12ALSA: hda - Add snd_hda_override_conn_list() helper functionTakashi Iwai
Add a function to add/modify the connection-list cache entry. It'll be useful to fix a buggy hardware result. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2011-07-11drivers/net: static should be at beginning of declarationJesper Juhl
Make sure that the 'static' keywork is at the beginning of declaration for drivers/net/usb/kalmia.c This gets rid of warnings like warning: ‘static’ is not at beginning of declaration when building with -Wold-style-declaration (and/or -Wextra which also enables it). Signed-off-by: Jesper Juhl <jj@chaosbits.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-07-11slip: fix wrong SLIP6 ifdef-endif placingMatvejchikov Ilya
SLIP6 have nothing to do with CSLIP so placing a block of SLIP6-related code within a CSLIP ifdef-endif block is incorrect. Signed-off-by: Ilya Matvejchikov <matvejchikov@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-07-11inetpeer: kill inet_putpeer raceEric Dumazet
We currently can free inetpeer entries too early : [ 782.636674] WARNING: kmemcheck: Caught 32-bit read from uninitialized memory (f130f44c) [ 782.636677] 1f7b13c100000000000000000000000002000000000000000000000000000000 [ 782.636686] i i i i u u u u i i i i u u u u i i i i u u u u u u u u u u u u [ 782.636694] ^ [ 782.636696] [ 782.636698] Pid: 4638, comm: ssh Not tainted 3.0.0-rc5+ #270 Hewlett-Packard HP Compaq 6005 Pro SFF PC/3047h [ 782.636702] EIP: 0060:[<c13fefbb>] EFLAGS: 00010286 CPU: 0 [ 782.636707] EIP is at inet_getpeer+0x25b/0x5a0 [ 782.636709] EAX: 00000002 EBX: 00010080 ECX: f130f3c0 EDX: f0209d30 [ 782.636711] ESI: 0000bc87 EDI: 0000ea60 EBP: f0209ddc ESP: c173134c [ 782.636712] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 [ 782.636714] CR0: 8005003b CR2: f0beca80 CR3: 30246000 CR4: 000006d0 [ 782.636716] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 [ 782.636717] DR6: ffff4ff0 DR7: 00000400 [ 782.636718] [<c13fbf76>] rt_set_nexthop.clone.45+0x56/0x220 [ 782.636722] [<c13fc449>] __ip_route_output_key+0x309/0x860 [ 782.636724] [<c141dc54>] tcp_v4_connect+0x124/0x450 [ 782.636728] [<c142ce43>] inet_stream_connect+0xa3/0x270 [ 782.636731] [<c13a8da1>] sys_connect+0xa1/0xb0 [ 782.636733] [<c13a99dd>] sys_socketcall+0x25d/0x2a0 [ 782.636736] [<c149deb8>] sysenter_do_call+0x12/0x28 [ 782.636738] [<ffffffff>] 0xffffffff Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-07-11e1000e: remove e1000_queue_statsEric Dumazet
struct e1000_queue_stats is not used, lets remove it Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Acked-by: Bruce Allan <bruce.w.allan@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-07-11net: introduce __netdev_alloc_skb_ip_alignEric Dumazet
RX rings should use GFP_KERNEL allocations if possible, add __netdev_alloc_skb_ip_align() helper to ease this. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-07-11Merge branch 'master' of ↵David S. Miller
master.kernel.org:/pub/scm/linux/kernel/git/jkirsher/net-next-2.6
2011-07-12Staging: delete westbridge codeGreg Kroah-Hartman
It's been stagnant for a while with out much forward progress for a variety of different reasons. So remove it for now. It can be reverted at any time if development picks back up again. Acked-by: David Cross <odc@cypress.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-07-11ixgbe: Make certain to initialize the fdir_perfect_lock in all casesAlexander Duyck
This fix makes it so that the fdir_perfect_lock is initialized in all cases. This is necessary as the fdir_filter_exit routine will always attempt to take the lock before inspecting the filter table. Reported-by: Ben Greear <greearb@candelatech.com> Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2011-07-11igb: Add support of SerDes Forced mode for certain hardwareCarolyn Wyborny
This patch changes the serdes link code to support a forced mode for some hardware, based on bit set in EEPROM. Signed-off-by: Carolyn Wyborny <carolyn.wyborny@intel.com> Tested-by: Jeff Pieper <jeffrey.e.pieper@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2011-07-11igb: Update copyright on all igb driver files.Carolyn Wyborny
This patch updates the copyright on the igb driver files to 2011. Signed-off-by: Carolyn Wyborny <carolyn.wyborny@intel.com> Tested-by: Aaron Brown <aaron.f.brown@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2011-07-11igb: Fix lack of flush after register write and before delayCarolyn Wyborny
Register writes followed by a delay are required to have a flush before the delay in order to commit the values to the register. Without the flush, the code following the delay may not function correctly. Reported-by: Tong Ho <tong.ho@ericsson.com> Reported-by: Guenter Roeck <guenter.roeck@ericsson.com> Signed-off-by: Carolyn Wyborny <carolyn.wyborny@intel.com> Tested-by: Aaron Brown <aaron.f.brown@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2011-07-12powerpc/mm: Fix memory_block_size_bytes() for non-pseriesBenjamin Herrenschmidt
Just compiling pseries in the kernel causes it to override memory_block_size_bytes() regardless of what is the runtime platform. This cleans up the implementation of that function, fixing a bug or two while at it, so that it's harmless (and potentially useful) for other platforms. Without this, bugs in that code would trigger a WARN_ON() in drivers/base/memory.c when booting some different platforms. If/when we have another platform supporting memory hotplug we might want to either move that out to a generic place or make it a ppc_md. callback. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-07-12mm: Move definition of MIN_MEMORY_BLOCK_SIZE to a headerBenjamin Herrenschmidt
The macro MIN_MEMORY_BLOCK_SIZE is currently defined twice in two .c files, and I need it in a third one to fix a powerpc bug, so let's first move it into a header Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Ingo Molnar <mingo@elte.hu>
2011-07-11[media] nuvoton-cir: make idle timeout more saneJarod Wilson
The nuvoton-cir inherited an insanely low idle timeout value from the mceusb driver. We're fixing mceusb, should fix this driver too. Signed-off-by: Jarod Wilson <jarod@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-07-11[media] mceusb: increase default timeout to 100msRafi Rubin
This matches the typical timeout advertised by hardware, once we're actually interpreting it correctly. Signed-off-by: Rafi Rubin <rafi@seas.upenn.edu> Signed-off-by: Jarod Wilson <jarod@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-07-11[media] mceusb: Timeout unit correctionsRafi Rubin
Unit missmatch in mceusb_handle_command. It should be converting to us, not 1/10th of ms. mceusb_dev_printdata 100us/ms -> 1000us/ms Alter format of fix slightly and update comment to match proper reality. Signed-off-by: Rafi Rubin <rafi@seas.upenn.edu> Signed-off-by: Jarod Wilson <jarod@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-07-11Linux 3.0-rc7v3.0-rc7Linus Torvalds
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