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* Merge branch 'upstream-linus' of git://github.com/jgarzik/libata-devLinus Torvalds2012-01-10
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'upstream-linus' of git://github.com/jgarzik/libata-dev: ahci: support the STA2X11 I/O Hub pata_bf54x: fix BMIDE status register emulation ata: add ata port hibernate callbacks ata: update ata port's runtime status during system resume [SCSI] runtime resume parent for child's system-resume ahci: platform support for suspend/resume libata-core: kill duplicate statement in ata_do_set_mode() pata_of_platform: remove direct dependency on OF_IRQ SATA/PATA: convert drivers/ata/* to use module_platform_driver() pata_cs5536: forward port changes from cs5536 libata-sff: use ATAPI_{COD|IO} ata: add ata port runtime PM callbacks ata: add ata port system PM callbacks [SCSI] sd: check runtime PM status in sd_shutdown [SCSI] check runtime PM status in system PM [SCSI] add flag to skip the runtime PM calls on the host ata: make ata port as parent device of scsi host ahci: start engine only during soft/hard resets
| * ahci: support the STA2X11 I/O HubAlessandro Rubini2012-01-08
| | | | | | | | | | | | | | | | | | | | | | The AHCI controller found in the STA2X11 chip uses BAR number 0 instead of 5. Also, the chip's fixup code sets a special DMA mask for all of its PCI functions, and the mask must be preserved here. Signed-off-by: Alessandro Rubini <rubini@gnudd.com> Acked-by: Giancarlo Asnaghi <giancarlo.asnaghi@st.com> Cc: Alan Cox <alan@linux.intel.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
| * pata_bf54x: fix BMIDE status register emulationSergei Shtylyov2012-01-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The author of this driver clearly wasn't familiar with the BMIDE specification (also known as SFF-8038i) when he implemented the bmdma_status() method: first, the interrupt bit of the BMIDE status register corresponds to nothing else but INTRQ signal (ATAPI_DEV_INT here); second, the error bit is only set if the controller encounters issue doing the bus master transfers, not on the IDE DMA burst termination interrupts like here (moreover, setting the error bit doesn't cause an interrupt). We now need to disable all those unused interrupts... (The only thing I couldn't figure out is how to flush the FIFO to memory once the interrupt happens as required by the mentioned spec.) Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
| * ata: add ata port hibernate callbacksLin Ming2012-01-08
| | | | | | | | | | Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
| * ata: update ata port's runtime status during system resumeLin Ming2012-01-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The ata port is brought back to full power state during system resume. So its runtime PM status will have to be updated to reflect the actual post-system sleep status. This also fixes below warning during system suspend/resume. WARNING: at /work/linux/drivers/ata/libata-eh.c:4034 ata_scsi_port_error_handler+0x89/0x557() 4034 WARN_ON(!(ap->pflags & ATA_PFLAG_SUSPENDED)); Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
| * [SCSI] runtime resume parent for child's system-resumeLin Ming2012-01-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | [Patch description from Alan Stern] If a child device was runtime-suspended when a system suspend began, then there will be nothing to prevent its parent from runtime-suspending as soon as it is woken up during the system resume. Then when the time comes to resume the child, the resume will fail because the parent is already back at low power. On the other hand, there are some devices which should remain at low power across an entire suspend-resume cycle. The details depend on the device and the platform. This suggests that the PM core is not the right place to solve the problem. One possible solution is for the subsystem or device driver to call pm_runtime_get_sync(dev->parent) at the start of the system-resume procedure and pm_runtime_put_sync(dev->parent) at the end. Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
| * ahci: platform support for suspend/resumeBrian Norris2012-01-08
| | | | | | | | | | | | | | | | | | Add platform hooks for custom suspend() and resume() functions. The generic suspend/resume code in drivers/ata/ahci_platform.c is adapted from the PCI version in drivers/ata/ahci.c. Signed-off-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
| * libata-core: kill duplicate statement in ata_do_set_mode()Sergei Shtylyov2012-01-08
| | | | | | | | | | | | | | | | | | | | Commit b3a706014e56b1356e7b275fd25b833c63175bf0 (libata: Add a drivers/ide style DMA disable) neglected to remove the line in ata_do_set_mode() it has obviously made useless/duplicated. Do this now, and make a line added back then wrapped properly... Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
| * pata_of_platform: remove direct dependency on OF_IRQRob Herring2012-01-08
| | | | | | | | | | | | | | | | | | | | CONFIG_OF_IRQ is not available on some platforms and using of_irq_* breaks the build. Since resources are already populated in the platform device, get the irq from there instead. Reported-by: David S. Miller <davem@davemloft.net> Signed-off-by: Rob Herring <rob.herring@calxeda.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
| * SATA/PATA: convert drivers/ata/* to use module_platform_driver()Axel Lin2012-01-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch converts the drivers in drivers/ata/* to use the module_platform_driver() macro which makes the code smaller and a bit simpler. Cc: Viresh Kumar <viresh.kumar@st.com> Cc: Jeff Garzik <jgarzik@pobox.com> Cc: Arnaud Patard <arnaud.patard@rtp-net.org> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: Sylvain Munaut <tnt@246tNt.com> Cc: Anton Vorontsov <avorontsov@ru.mvista.com> Cc: Marek Vasut <marek.vasut@gmail.com> Cc: Florian Fainelli <florian@openwrt.org> Cc: Mark Miesfeld <mmiesfeld@amcc.com> Cc: Ashish Kalra <ashish.kalra@freescale.com> Cc: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
| * pata_cs5536: forward port changes from cs5536Bartlomiej Zolnierkiewicz2012-01-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * Fix cable detection to also account for the slave device cable bit. * Disable UDMA when programming MWDMA in cs5536_set_dmamode(). * Don't change UDMA settings in cs5536_set_piomode(). * Add cs5536_program_dtc() helper. * Cleanup and uninline cs5536_[read,write]() methods. Cc: Martin K. Petersen <mkp@mkp.net> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
| * libata-sff: use ATAPI_{COD|IO}Sergei Shtylyov2012-01-08
| | | | | | | | | | | | | | | | atapi_pio_bytes() uses bare numbers for the ATAPI interrupt reason bits despite these are #define'd in <linux/ata.h>. Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
| * ata: add ata port runtime PM callbacksLin Ming2012-01-08
| | | | | | | | | | | | | | | | | | | | Add ata port runtime suspend/resume/idle callbacks. Set ->eh_noresume to skip the runtime PM calls on scsi host in the error handler to avoid dead lock. Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
| * ata: add ata port system PM callbacksLin Ming2012-01-08
| | | | | | | | | | | | | | | | | | | | Change ata_host_request_pm to ata_port_request_pm which performs port suspend/resume. Add ata port type driver which implements port PM callbacks. Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
| * [SCSI] sd: check runtime PM status in sd_shutdownLin Ming2012-01-08
| | | | | | | | | | | | | | | | | | | | | | | | sd_shutdown is called during reboot/poweroff. It may fail if parent device, for example, ata port, was runtime suspended. Fix it by checking runtime PM status of sd. Exit immediately if sd was runtime suspended already. Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
| * [SCSI] check runtime PM status in system PMLin Ming2012-01-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The only high-level SCSI driver that currently implements runtime PM is sd, and sd treats runtime suspend exactly the same as the SUSPEND and HIBERNATE stages of system sleep, but not the same as the FREEZE stage. Therefore, when entering the SUSPEND or HIBERNATE stages of system sleep, we can skip the callback to the driver if the device is already in runtime suspend. When entering the FREEZE stage, however, we should first issue a runtime resume. The overhead of doing this is negligible, because a suspended drive would be spun up during the THAW stage of hibernation anyway. Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
| * [SCSI] add flag to skip the runtime PM calls on the hostLin Ming2012-01-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With previous change, now the ata port runtime suspend will happen as: disk suspend --> scsi target suspend --> scsi host suspend --> ata port suspend ata port(parent device) suspend need to schedule scsi EH which will resume scsi host(child device). Then the child device resume will in turn make parent device resume first. This is kind of recursive. This patch adds a new flag Scsi_Host::eh_noresume. ata port will set this flag to skip the runtime PM calls on scsi host. Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
| * ata: make ata port as parent device of scsi hostLin Ming2012-01-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, the device tree of ata port and scsi host looks as below, /sys/devices/pci0000:00/0000:00:1f.2 (ahci controller) |-- ata1 (ata port) |-- host0 (scsi host) |-- target0:0:0 (scsi target) |-- 0:0:0:0 (disk) This patch makes ata port as parent device of scsi host, then it becomes /sys/devices/pci0000:00/0000:00:1f.2 (ahci controller) |-- ata1 (ata port) |-- host0 (scsi host) |-- target0:0:0 (scsi target) |-- 0:0:0:0 (disk) With this change, the ata port runtime PM is easier. For example, the ata port runtime suspend will happen as, disk suspend --> scsi target suspend --> scsi host suspend --> ata port suspend. Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
| * ahci: start engine only during soft/hard resetsTejun Heo2012-01-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is another attempt at fixing the same problem that 270dac35c2 (libata: ahci_start_engine compliant to AHCI spec) tried to solve. Unfortunately, 270dac35c2 created regressions for a lot more common controllers and got reverted. This specific AHCI IP block becomes a brick if the DMA engine is started while DRQ is set. It is not possible to avoid the condition completely but the most common occurrence is caused by spurious use of ahci_start_engine() from ahci_start_port() during init sequence. DMA engine is started after both soft and hard resets and ahci_start_port() is always followed by resets, so there is no reason to start DMA engine from ahci_start_port(). This patch removes ahci_start_engine() invocation from ahci_start_port(). This change makes failure path of ahci_port_suspend() leave engine stopped without following resets. This is resolved by replacing ahci_start_port() call with ata_port_freeze() which forces resets afterwards, which is the better behavior anyway. Signed-off-by: Tejun Heo <tj@kernel.org> Reported-by: Brian Norris <computersforpeace@gmail.com> Reported-by: Jian Peng <jipeng2005@gmail.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* | Merge branch 'stable/for-linus-3.3' of ↵Linus Torvalds2012-01-10
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen * 'stable/for-linus-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: (37 commits) xen/pciback: Expand the warning message to include domain id. xen/pciback: Fix "device has been assigned to X domain!" warning xen/pciback: Move the PCI_DEV_FLAGS_ASSIGNED ops to the "[un|]bind" xen/xenbus: don't reimplement kvasprintf via a fixed size buffer xenbus: maximum buffer size is XENSTORE_PAYLOAD_MAX xen/xenbus: Reject replies with payload > XENSTORE_PAYLOAD_MAX. Xen: consolidate and simplify struct xenbus_driver instantiation xen-gntalloc: introduce missing kfree xen/xenbus: Fix compile error - missing header for xen_initial_domain() xen/netback: Enable netback on HVM guests xen/grant-table: Support mappings required by blkback xenbus: Use grant-table wrapper functions xenbus: Support HVM backends xen/xenbus-frontend: Fix compile error with randconfig xen/xenbus-frontend: Make error message more clear xen/privcmd: Remove unused support for arch specific privcmp mmap xen: Add xenbus_backend device xen: Add xenbus device driver xen: Add privcmd device driver xen/gntalloc: fix reference counts on multi-page mappings ...
| * | xen/pciback: Expand the warning message to include domain id.Konrad Rzeszutek Wilk2012-01-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When a PCI device is transferred to another domain and it is still in usage (from the internal perspective), mention which other domain is using it to aid in debugging. [v2: Truncate the verbose message per Jan Beulich suggestion] [v3: Suggestions from Ian Campbell on the wording] Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Acked-by: Jan Beulich <jbeulich@suse.com>
| * | xen/pciback: Fix "device has been assigned to X domain!" warningKonrad Rzeszutek Wilk2012-01-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The full warning is: "pciback 0000:05:00.0: device has been assigned to 2 domain! Over-writting the ownership, but beware." which is correct - the previous domain that was using the device forgot to unregister the ownership. This patch fixes this by calling the unregister ownership function when the PCI device is relinquished from the guest domain. Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | xen/pciback: Move the PCI_DEV_FLAGS_ASSIGNED ops to the "[un|]bind"Konrad Rzeszutek Wilk2012-01-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | operation instead of doing it per guest creation/disconnection. Without this we could have potentially unloaded the vf driver from the xen pciback control even if the driver was binded to the xen-pciback. This will hold on to it until the user "unbind"s the PCI device using SysFS. Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | xen/xenbus: don't reimplement kvasprintf via a fixed size bufferIan Campbell2012-01-04
| | | | | | | | | | | | | | | | | | | | | Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Cc: Haogang Chen <haogangchen@gmail.com> Acked-by: Jan Beulich <JBeulich@suse.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | xenbus: maximum buffer size is XENSTORE_PAYLOAD_MAXIan Campbell2012-01-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use this now that it is defined even though it happens to be == PAGE_SIZE. The code which takes requests from userspace already validates against the size of this buffer so no further checks are required to ensure that userspace requests comply with the protocol in this respect. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Cc: Haogang Chen <haogangchen@gmail.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | xen/xenbus: Reject replies with payload > XENSTORE_PAYLOAD_MAX.Ian Campbell2012-01-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Haogang Chen found out that: There is a potential integer overflow in process_msg() that could result in cross-domain attack. body = kmalloc(msg->hdr.len + 1, GFP_NOIO | __GFP_HIGH); When a malicious guest passes 0xffffffff in msg->hdr.len, the subsequent call to xb_read() would write to a zero-length buffer. The other end of this connection is always the xenstore backend daemon so there is no guest (malicious or otherwise) which can do this. The xenstore daemon is a trusted component in the system. However this seem like a reasonable robustness improvement so we should have it. And Ian when read the API docs found that: The payload length (len field of the header) is limited to 4096 (XENSTORE_PAYLOAD_MAX) in both directions. If a client exceeds the limit, its xenstored connection will be immediately killed by xenstored, which is usually catastrophic from the client's point of view. Clients (particularly domains, which cannot just reconnect) should avoid this. so this patch checks against that instead. This also avoids a potential integer overflow pointed out by Haogang Chen. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Cc: Haogang Chen <haogangchen@gmail.com> CC: stable@kernel.org Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | Xen: consolidate and simplify struct xenbus_driver instantiationJan Beulich2012-01-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The 'name', 'owner', and 'mod_name' members are redundant with the identically named fields in the 'driver' sub-structure. Rather than switching each instance to specify these fields explicitly, introduce a macro to simplify this. Eliminate further redundancy by allowing the drvname argument to DEFINE_XENBUS_DRIVER() to be blank (in which case the first entry from the ID table will be used for .driver.name). Also eliminate the questionable xenbus_register_{back,front}end() wrappers - their sole remaining purpose was the checking of the 'owner' field, proper setting of which shouldn't be an issue anymore when the macro gets used. v2: Restore DRV_NAME for the driver name in xen-pciback. Signed-off-by: Jan Beulich <jbeulich@suse.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com> Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de> Cc: Ian Campbell <ian.campbell@citrix.com> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | xen-gntalloc: introduce missing kfreeJulia Lawall2012-01-03
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Error handling code following a kmalloc should free the allocated data. Out_unlock is used on both success and failure, so free vm_priv before jumping to that label. A simplified version of the semantic match that finds the problem is as follows: (http://coccinelle.lip6.fr) // <smpl> @r exists@ local idexpression x; statement S; identifier f1; position p1,p2; expression *ptr != NULL; @@ x@p1 = \(kmalloc\|kzalloc\|kcalloc\)(...); ... if (x == NULL) S <... when != x when != if (...) { <+...x...+> } x->f1 ...> ( return \(0\|<+...x...+>\|ptr\); | return@p2 ...; ) @script:python@ p1 << r.p1; p2 << r.p2; @@ print "* file: %s kmalloc %s return %s" % (p1[0].file,p1[0].line,p2[0].line) // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> [v1: Altered the description a bit] Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | xen/xenbus: Fix compile error - missing header for xen_initial_domain()Konrad Rzeszutek Wilk2011-12-21
| | | | | | | | | | | | | | | | | | | | | drivers/xen/xenbus/xenbus_dev_backend.c:74:2: error: implicit declaration of function 'xen_initial_domain' Reported-by: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | xen/netback: Enable netback on HVM guestsDaniel De Graaf2011-12-20
| | | | | | | | | | | | | | | | | | | | | Acked-by: Ian Campbell <ian.campbell@citrix.com> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Daniel De Graaf <dgdegra@tycho.nsa.gov> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | xen/grant-table: Support mappings required by blkbackDaniel De Graaf2011-12-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add support for mappings without GNTMAP_contains_pte. This was not supported because the unmap operation assumed that this flag was being used; adding a parameter to the unmap operation to allow the PTE clearing to be disabled is sufficient to make unmap capable of supporting either mapping type. Signed-off-by: Daniel De Graaf <dgdegra@tycho.nsa.gov> [v1: Fix cleanpatch warnings] Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | xenbus: Use grant-table wrapper functionsDaniel De Graaf2011-12-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For xenbus_{map,unmap}_ring to work on HVM, the grant table operations must be set up using the gnttab_set_{map,unmap}_op functions instead of directly populating the fields of gnttab_map_grant_ref. These functions simply populate the structure on paravirtualized Xen; however, on HVM they must call __pa() on vaddr when populating op->host_addr because the hypervisor cannot directly interpret guest-virtual addresses. Signed-off-by: Daniel De Graaf <dgdegra@tycho.nsa.gov> [v1: Fixed cleanpatch error] Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | xenbus: Support HVM backendsDaniel De Graaf2011-12-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add HVM implementations of xenbus_(map,unmap)_ring_v(alloc,free) so that ring mappings can be done without using GNTMAP_contains_pte which is not supported on HVM. This also removes the need to use vmlist_lock on PV by tracking the allocated xenbus rings. Signed-off-by: Daniel De Graaf <dgdegra@tycho.nsa.gov> [v1: Fix compile error when XENBUS_FRONTEND is defined as module] Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | Merge commit 'v3.2-rc3' into stable/for-linus-3.3Konrad Rzeszutek Wilk2011-12-20
| |\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * commit 'v3.2-rc3': (412 commits) Linux 3.2-rc3 virtio-pci: make reset operation safer virtio-mmio: Correct the name of the guest features selector virtio: add HAS_IOMEM dependency to MMIO platform bus driver eCryptfs: Extend array bounds for all filename chars eCryptfs: Flush file in vma close eCryptfs: Prevent file create race condition regulator: TPS65910: Fix VDD1/2 voltage selector count i2c: Make i2cdev_notifier_call static i2c: Delete ANY_I2C_BUS i2c: Fix device name for 10-bit slave address i2c-algo-bit: Generate correct i2c address sequence for 10-bit target drm: integer overflow in drm_mode_dirtyfb_ioctl() Revert "of/irq: of_irq_find_parent: check for parent equal to child" drivers/gpu/vga/vgaarb.c: add missing kfree drm/radeon/kms/atom: unify i2c gpio table handling drm/radeon/kms: fix up gpio i2c mask bits for r4xx for real ttm: Don't return the bo reserved on error path mount_subtree() pointless use-after-free iio: fix a leak due to improper use of anon_inode_getfd() ...
| * | | xen/xenbus-frontend: Fix compile error with randconfigKonrad Rzeszutek Wilk2011-12-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | drivers/xen/xenbus/xenbus_dev_frontend.c: In function 'xenbus_init': drivers/xen/xenbus/xenbus_dev_frontend.c:609:2: error: implicit declaration of function 'xen_domain' Reported-by: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | | xen/xenbus-frontend: Make error message more clearBastian Blank2011-12-16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add the work frontend to the error message because we now also have a backend device. Signed-off-by: Bastian Blank <waldi@debian.org> Acked-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | | xen/privcmd: Remove unused support for arch specific privcmp mmapBastian Blank2011-12-16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This was used for ia64. But there is no working ia64 support in sight, so remove it for now. Signed-off-by: Bastian Blank <waldi@debian.org> Acked-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | | xen: Add xenbus_backend deviceBastian Blank2011-12-16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Access for xenstored to the event channel and pre-allocated ring is managed via xenfs. This adds its own character device featuring mmap for the ring and an ioctl for the event channel. Signed-off-by: Bastian Blank <waldi@debian.org> Acked-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | | xen: Add xenbus device driverBastian Blank2011-12-16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Access to xenbus is currently handled via xenfs. This adds a device driver for xenbus and makes xenfs use this code. Signed-off-by: Bastian Blank <waldi@debian.org> Acked-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | | xen: Add privcmd device driverBastian Blank2011-12-16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Access to arbitrary hypercalls is currently provided via xenfs. This adds a standard character device to handle this. The support in xenfs remains for backward compatibility and uses the device driver code. Signed-off-by: Bastian Blank <waldi@debian.org> Acked-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | | xen/gntalloc: fix reference counts on multi-page mappingsDaniel De Graaf2011-12-16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When a multi-page mapping of gntalloc is created, the reference counts of all pages in the vma are incremented. However, the vma open/close operations only adjusted the reference count of the first page in the mapping, leaking the other pages. Store a struct in the vm_private_data to track the original page count to properly free the pages when the last reference to the vma is closed. Reported-by: Anil Madhavapeddy <anil@recoil.org> Signed-off-by: Daniel De Graaf <dgdegra@tycho.nsa.gov> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | | xen/gntalloc: release grant references on page freeDaniel De Graaf2011-12-16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | gnttab_end_foreign_access_ref does not return the grant reference it is passed to the free list; gnttab_free_grant_reference needs to be explicitly called. While gnttab_end_foreign_access provides a wrapper for this, it is unsuitable because it does not return errors. Reported-by: Anil Madhavapeddy <anil@recoil.org> Signed-off-by: Daniel De Graaf <dgdegra@tycho.nsa.gov> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | | xen/events: prevent calling evtchn_get on invalid channelsDaniel De Graaf2011-12-16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The event channel number provided to evtchn_get can be provided by userspace, so needs to be checked against the maximum number of event channels prior to using it to index into evtchn_to_irq. Signed-off-by: Daniel De Graaf <dgdegra@tycho.nsa.gov> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | | xen/granttable: Support transitive grantsAnnie Li2011-12-16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | These allow a domain A which has been granted access on a page of domain B's memory to issue domain C with a copy-grant on the same page. This is useful e.g. for forwarding packets between domains. Signed-off-by: Annie Li <annie.li@oracle.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | | xen/granttable: Support sub-page grantsAnnie Li2011-12-16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - They can't be used to map the page (so can only be used in a GNTTABOP_copy hypercall). - It's possible to grant access with a finer granularity than whole pages. - Xen guarantees that they can be revoked quickly (a normal map grant can only be revoked with the cooperation of the domain which has been granted access). Signed-off-by: Annie Li <annie.li@oracle.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | | xen/granttable: Improve comments for function pointersAnnie Li2011-12-16
| | | | | | | | | | | | | | | | | | | | Signed-off-by: Annie Li <annie.li@oracle.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | | xen/granttable: Keep code format cleanAnnie Li2011-11-22
| | | | | | | | | | | | | | | | | | | | | | | | Acked-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Annie Li <annie.li@oracle.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | | xen/granttable: Grant tables V2 implementationAnnie Li2011-11-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Receiver-side copying of packets is based on this implementation, it gives better performance and better CPU accounting. It totally supports three types: full-page, sub-page and transitive grants. However this patch does not cover sub-page and transitive grants, it mainly focus on Full-page part and implements grant table V2 interfaces corresponding to what already exists in grant table V1, such as: grant table V2 initialization, mapping, releasing and exported interfaces. Each guest can only supports one type of grant table type, every entry in grant table should be the same version. It is necessary to set V1 or V2 version before initializing the grant table. Grant table exported interfaces of V2 are same with those of V1, Xen is responsible to judge what grant table version guests are using in every grant operation. V2 fulfills the same role of V1, and it is totally backwards compitable with V1. If dom0 support grant table V2, the guests runing on it can run with either V1 or V2. Acked-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Annie Li <annie.li@oracle.com> [v1: Modified alloc_vm_area call (new parameters), indentation, and cleanpatch warnings] Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | | xen/granttable: Refactor some codeAnnie Li2011-11-22
| | | | | | | | | | | | | | | | | | | | | | | | Acked-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Annie Li <annie.li@oracle.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * | | xen/granttable: Introducing grant table V2 stuctureAnnie Li2011-11-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch introduces new structures of grant table V2, grant table V2 is an extension from V1. Grant table is shared between guest and Xen, and Xen is responsible to do corresponding work for grant operations, such as: figure out guest's grant table version, perform different actions based on different grant table version, etc. Although full-page structure of V2 is different from V1, it play the same role as V1. Acked-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Annie Li <annie.li@oracle.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-07 07:49:11 -0500