- 27 Oct, 2010 1 commit
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Weidong Han authored
Register a pci notifier to add (or remove) pci devices to Xen via hypercalls. Xen needs to know the pci devices present in the system to handle pci passthrough and even MSI remapping in the initial domain. Signed-off-by:
Weidong Han <weidong.han@intel.com> Signed-off-by:
Qing He <qing.he@intel.com> Signed-off-by:
Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by:
Stefano Stabellini <stefano.stabellini@eu.citrix.com>
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- 26 Oct, 2010 1 commit
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Stefano Stabellini authored
Pv guests don't have ACPI and need the cpu masks to be set correctly as early as possible so we call xen_fill_possible_map from xen_smp_init. On the other hand the initial domain supports ACPI so in this case we skip xen_fill_possible_map and rely on it. However Xen might limit the number of cpus usable by the domain, so we filter those masks during smp initialization using the VCPUOP_is_up hypercall. It is important that the filtering is done before xen_setup_vcpu_info_placement. Signed-off-by:
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- 22 Oct, 2010 18 commits
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Stefano Stabellini authored
Add missing #include <asm/io_apic.h> to arch/x86/pci/xen.c. Signed-off-by: -
Stefano Stabellini authored
We don't want Linux to think that the cpu supports MTRRs when running under Xen because MTRR operations could only be performed through hypercalls. Signed-off-by:
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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Jeremy Fitzhardinge authored
Use the console hypercalls for dom0 console. [ Impact: Add Xen dom0 console ] Signed-off-by:
Juan Quintela <quintela@redhat.com> Signed-off-by:
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Juan Quintela authored
add the direct mapping area for ISA bus access when running as initial domain Signed-off-by:
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Juan Quintela authored
Do initial xenbus/xenstore setup in dom0. In dom0 we need to actually allocate the xenstore resources, rather than being given them from outside. [ Impact: initialize Xenbus ] Signed-off-by:
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Stefano Stabellini authored
Signed-off-by:
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Jeremy Fitzhardinge authored
Signed-off-by:
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Qing He authored
Implement xen_create_msi_irq to create an msi and remap it as pirq. Use xen_create_msi_irq to implement an initial domain specific version of setup_msi_irqs. Signed-off-by:
Yunhong Jiang <yunhong.jiang@intel.com> Signed-off-by:
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Jeremy Fitzhardinge authored
Implement xen_register_gsi to setup the correct triggering and polarity properties of a gsi. Implement xen_register_pirq to register a particular gsi as pirq and receive interrupts as events. Call xen_setup_pirqs to register all the legacy ISA irqs as pirqs. Signed-off-by:
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Stefano Stabellini authored
Add XEN_DOM0 to arch/x86/xen/Kconfig as a silent compile time option that gets enabled when xen and basic x86, acpi and pci support are selected. Signed-off-by:
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Stefano Stabellini authored
Map MSIs into pirqs, writing 0 in the MSI vector data field and the pirq number in the MSI destination id field. Signed-off-by:
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Stefano Stabellini authored
Disable pcifront when running on HVM: it is meant to be used with pv guests that don't have PCI bus. Use acpi_register_gsi_xen_hvm to remap GSIs into pirqs. Signed-off-by:
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Jeremy Fitzhardinge authored
Signed-off-by:
Rafael J. Wysocki <rjw@sisk.pl>
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Jeremy Fitzhardinge authored
Rather than using a tree of conditionals, use function pointer for acpi_register_gsi. Signed-off-by:
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Stefano Stabellini authored
xen_hvm_register_pirq allows the kernel to map a GSI into a Xen pirq and receive the interrupt as an event channel from that point on. Signed-off-by:
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Stefano Stabellini authored
Use PHYSDEVOP_get_nr_pirqs to get the maximum number of pirqs from xen. Signed-off-by:
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Stefano Stabellini authored
PHYSDEVOP_map_pirq might return a pirq different from what we asked if we are running as an HVM guest, so we need to be able to support pirqs that are different from linux irqs. Signed-off-by:
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Stefano Stabellini authored
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- 21 Oct, 2010 1 commit
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Konrad Rzeszutek Wilk authored
This looks to be vestigial dependency that had never been used even in the original code base (2.6.18) from which this driver was up-ported. Without this fix, with the CONFIG_ISAPNP, we get this compile failure: arch/x86/pci/xen.c: In function 'pci_xen_init': arch/x86/pci/xen.c:138: error: 'isapnp_disable' undeclared (first use in this function) arch/x86/pci/xen.c:138: error: (Each undeclared identifier is reported only once arch/x86/pci/xen.c:138: error: for each function it appears in.) Reported-by:
Li Zefan <lizf@cn.fujitsu.com> Tested-by:
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- 20 Oct, 2010 2 commits
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Konrad Rzeszutek Wilk authored
Without this dependency we get these compile errors: linux-next-20101020/drivers/xen/biomerge.c: In function 'xen_biovec_phys_mergeable': linux-next-20101020/drivers/xen/biomerge.c:8: error: dereferencing pointer to incomplete type linux-next-20101020/drivers/xen/biomerge.c:9: error: dereferencing pointer to incomplete type linux-next-20101020/drivers/xen/biomerge.c:11: error: implicit declaration of function '__BIOVEC_PHYS_MERGEABLE' Signed-off-by:
Randy Dunlap <randy.dunlap@oracle.com>
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Konrad Rzeszutek Wilk authored
Chris is working on other stuff now, and I am working full-time with Jeremy on these bits. Signed-off-by:
Chris Wright <chrisw@sous-sol.org>
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- 18 Oct, 2010 17 commits
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Konrad Rzeszutek Wilk authored
Thomas Gleixner cleaned up event handling to use the sparse_irq handling, but the xen-pcifront patches utilized the old mechanism. This fixes them to work with sparse_irq handling. Signed-off-by: -
Konrad Rzeszutek Wilk authored
We used to depend on CONFIG_SWIOTLB, but that is disabled by default. So when compiling we get this compile error: arch/x86/xen/pci-swiotlb-xen.c: In function 'pci_xen_swiotlb_detect': arch/x86/xen/pci-swiotlb-xen.c:48: error: lvalue required as left operand of assignment Fix it by actually activating the SWIOTLB library. Reported-by:
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Konrad Rzeszutek Wilk authored
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Konrad Rzeszutek Wilk authored
It used to done in the Xen startup code but that is not really appropiate. [v2: Update Kconfig with PCI requirement] Signed-off-by: -
Ryan Wilson authored
This is a port of the 2.6.18 Xen PCI front driver with fixes to make it build under 2.6.34 and later (for the full list of changes: git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen.git historic/xen-pcifront-0.1). It also includes the fixes to make it work properly. [v2: Updated Kconfig, removed crud, added Reviewed-by] [v3: Added 'static', fixed grant table leak, redid Kconfig] [v4: Added one more 'static' and removed comments] Signed-off-by:
Jan Beulich <JBeulich@novell.com>
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Noboru Iwamatsu authored
XenbusStateReconfiguring/XenbusStateReconfigured were introduced by c/s 437, but aren't handled in many switch statements. .. also pulled from the linux-2.6-sparse-tree tree. Signed-off-by:
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Yosuke Iwamatsu authored
The Xen PCI front driver adds two new states that are utilizez for PCI hotplug support. This is a patch pulled from the linux-2.6-xen-sparse tree. Signed-off-by:
Noboru Iwamatsu <n_iwamatsu@jp.fujitsu.com> Signed-off-by:
Yosuke Iwamatsu <y-iwamatsu@ab.jp.nec.com>
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Alex Nixon authored
The frontend stub lives in arch/x86/pci/xen.c, alongside other sub-arch PCI init code (e.g. olpc.c). It provides a mechanism for Xen PCI frontend to setup/destroy legacy interrupts, MSI/MSI-X, and PCI configuration operations. [ Impact: add core of Xen PCI support ] [ v2: Removed the IOMMU code and only focusing on PCI.] [ v3: removed usage of pci_scan_all_fns as that does not exist] [ v4: introduced pci_xen value to fix compile warnings] [ v5: squished fixes+features in one patch, changed Reviewed-by to Ccs] [ v7: added Acked-by] Signed-off-by:
Alex Nixon <alex.nixon@citrix.com> Signed-off-by:
Ian Campbell <ian.campbell@citrix.com> Signed-off-by:
Jesse Barnes <jbarnes@virtuousgeek.org> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Matthew Wilcox <willy@linux.intel.com> Cc: Qing He <qing.he@intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: x86@kernel.org
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Stefano Stabellini authored
Introduce an x86 specific indirect mechanism to setup MSIs. The MSI setup functions become function pointers in an x86_msi_ops struct, that defaults to the implementation in io_apic.c and msi.c. [v2: Use HAVE_DEFAULT_* knobs] Signed-off-by:
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Thomas Gleixner authored
Introduce an override for the arch_[teardown|setup]_msi_irqs that can be utilized to fallback to the default arch_* code. If a platform wants to utilize the code paths defined in driver/pci/msi.c it has to define HAVE_DEFAULT_MSI_TEARDOWN_IRQS or HAVE_DEFAULT_MSI_SETUP_IRQS. Otherwise the old mechanism of over-ridding the arch_* works fine. Signed-off-by: -
Konrad Rzeszutek Wilk authored
In preperation of modularizing Xen-pcifront the pci_walk_bus needs to be exported so that the xen-pcifront module can walk call the pci subsystem to walk the PCI devices and claim them. Signed-off-by:
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Jeremy Fitzhardinge authored
When mapping pci space via /sys or /proc, make sure we're really doing a hardware mapping by setting _PAGE_IOMAP. [ Impact: bugfix; make PCI mappings map the right pages ] Signed-off-by:
"H. Peter Anvin" <hpa@zytor.com> Reviewed-by:
Matthew Wilcox <willy@linux.intel.com> Acked-by:
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Alex Nixon authored
Separate out x86 cache_line_size initialisation code into its own function (so it can be shared by Xen later in this patch series) [ Impact: cleanup ] Signed-off-by:
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Konrad Rzeszutek Wilk authored
In driver/xen/events.c, whether bind_pirq is shareable or not is determined by desc->action is NULL or not. But in __setup_irq, startup(irq) is invoked before desc->action is assigned with new action. So desc->action in startup_irq is always NULL, and bind_pirq is always not shareable. This results in pt_irq_create_bind failure when passthrough a device which shares irq to other devices. This patch doesn't use probing_irq to determine if pirq is shareable or not, instead set shareable flag in irq_info according to trigger mode in xen_allocate_pirq. Set level triggered interrupts shareable. Thus use this flag to set bind_pirq flag accordingly. [v2: arch/x86/xen/pci.c no more, so file skipped] Signed-off-by:
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Konrad Rzeszutek Wilk authored
The 'xen_poll_irq_timeout' provides a method to pass in the poll timeout for IRQs if requested. We also export those two poll functions as Xen PCI fronted uses them. Signed-off-by:
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Konrad Rzeszutek Wilk authored
In earlier Xen Linux kernels, the IRQ mapping was a straight 1:1 and the find_unbound_irq started looking around 256 for open IRQs and up. IRQs from 0 to 255 were reserved for PCI devices. Previous to this patch, the 'find_unbound_irq' started looking at get_nr_hw_irqs() number. For privileged domain where the ACPI information is available that returns the upper-bound of what the GSIs. For non-privileged PV domains, where ACPI is no-existent the get_nr_hw_irqs() reports the IRQ_LEGACY (16). With PCI passthrough enabled, and with PCI cards that have IRQs pinned to a higher number than 16 we collide with previously allocated IRQs. Specifically the PCI IRQs collide with the IPI's for Xen functions (as they are allocated earlier). For example: 00:00.11 USB Controller: ATI Technologies Inc SB700 USB OHCI1 Controller (prog-if 10 [OHCI]) ... Interrupt: pin A routed to IRQ 18 [root@localhost ~]# cat /proc/interrupts | head CPU0 CPU1 CPU2 16: 38186 0 0 xen-dyn-virq timer0 17: 149 0 0 xen-dyn-ipi spinlock0 18: 962 0 0 xen-dyn-ipi resched0 and when the USB controller is loaded, the kernel reports: IRQ handler type mismatch for IRQ 18 current handler: resched0 One way to fix this is to reverse the logic when looking for un-used IRQ numbers and start with the highest available number. With that, we would get: CPU0 CPU1 CPU2 ... snip .. 292: 35 0 0 xen-dyn-ipi callfunc0 293: 3992 0 0 xen-dyn-ipi resched0 294: 224 0 0 xen-dyn-ipi spinlock0 295: 57183 0 0 xen-dyn-virq timer0 NMI: 0 0 0 Non-maskable interrupts .. snip .. And interrupts for PCI cards are now accessible. This patch also includes the fix, found by Ian Campbell, titled "xen: fix off-by-one error in find_unbound_irq." [v2: Added an explanation in the code] [v3: Rebased on top of tip/irq/core] Signed-off-by: -
Jeremy Fitzhardinge authored
Sometimes cpu_evtchn_mask_p can get used early, before it has been allocated. Statically initialize it with an initdata version to catch any early references. Signed-off-by:
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