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2017-08-31irqchip/gic-v4: Add VPE command interfaceMarc Zyngier
Add the required interfaces to schedule a VPE and perform a VINVALL command. Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2017-08-31irqchip/gic-v4: Add per-VM VPE domain creationMarc Zyngier
When creating a VM, it is very convenient to have an irq domain containing all the doorbell interrupts associated with that VM (each interrupt representing a VPE). Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2017-08-31irqchip/gic-v3-its: Set implementation defined bit to enable VLPIsMarc Zyngier
A long time ago, GITS_CTLR[1] used to be called GITC_CTLR.EnableVLPI. It has been subsequently deprecated and is now an "Implementation Defined" bit that may ot may not be set for GICv4. Brilliant. And the current crop of the FastModel requires that bit for VLPIs to be enabled. Oh well... Let's set it and find out what breaks. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2017-08-31irqchip/gic-v3-its: Allow doorbell interrupts to be injected/clearedMarc Zyngier
While the doorbell interrupts are usually driven by the HW itself, having a way to trigger them independently has proved to be a really useful debug feature. As it is actually very little code, let's add it to the VPE irqchip operations. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2017-08-31irqchip/gic-v3-its: Move pending doorbell after VMOVPMarc Zyngier
After moving a VPE from a redistributor to another, we're still left with a potential pending doorbell interrupt on the old redistributor. That interrupt should be moved to the new one to be either cleared or take, depending on what the hypervisor wishes to do. So let's move it right after having execited VMOVP. This doesn't add much cost in the !DirectLPI case (we trade a DISCARD for a MOVI), and the cost of the DIRECTLPI case should be minimal (two extra MMIO accesses). Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2017-08-31irqchip/gic-v3-its: Add device proxy for VPE management if !DirectLpiMarc Zyngier
When we don't have the DirectLPI feature, we must work around the architecture shortcomings to be able to perform the required maintenance (interrupt masking, clearing and injection). For this, we create a fake device whose sole purpose is to provide a way to issue commands as if we were dealing with LPIs coming from that device (while they actually originate from the ITS). This fake device doesn't have LPIs allocated to it, but instead uses the VPE LPIs. Of course, this could be a real bottleneck, and a naive implementation would require 6 commands to issue an invalidation. Instead, let's allocate at least one event per physical CPU (rounded up to the next power of 2), and opportunistically map the VPE doorbell to an event. This doorbell will be mapped until we roll over and need to reallocate this slot. This ensures that most of the time, we only need 2 commands to issue an INV, INT or CLEAR, making the performance a lot better, given that we always issue a CLEAR on entry, and an INV on each side of a trapped WFI. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2017-08-31irqchip/gic-v3-its: Make LPI allocation optional on device creationMarc Zyngier
The normal course of action when allocating the ITS' view of a device is to allocate the corresponding LPIs. But we're about to introduce devices that borrow their interrupts from some other entities. So let's make the allocation optional. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2017-08-31irqchip/gic-v3-its: Add VPE interrupt maskingMarc Zyngier
When masking/unmasking a doorbell interrupt, it is necessary to issue an invalidation to the corresponding redistributor. We use the DirectLPI feature by writting directly to the corresponding redistributor. Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2017-08-31irqchip/gic-v3-its: Add VPE affinity changesMarc Zyngier
When we're about to run a vcpu, it is crucial that the redistributor associated with the physical CPU is being told about the new residency. This is abstracted by hijacking the irq_set_affinity method for the doorbell interrupt associated with the VPE. It is expected that the hypervisor will call this method before scheduling the VPE. Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2017-08-31irqchip/gic-v3-its: Add VPE invalidation hookMarc Zyngier
When a guest issues a INVALL command targetting a collection, it must be translated into a VINVALL for the VPE that has this collection. This patch implements a hook that offers this functionallity to the hypervisor. Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2017-08-31irqchip/gic-v3-its: Add VPE schedulingMarc Zyngier
When a VPE is scheduled to run, the corresponding redistributor must be told so, by setting VPROPBASER to the VM's property table, and VPENDBASER to the vcpu's pending table. When scheduled out, we preserve the IDAI and PendingLast bits. The latter is specially important, as it tells the hypervisor that there are pending interrupts for this vcpu. Reviewed-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2017-08-31irqchip/gic-v3-its: Add VPENDBASER/VPROPBASER accessorsMarc Zyngier
V{PEND,PROP}BASER being 64bit registers, they need some ad-hoc accessors on 32bit, specially given that VPENDBASER contains a Valid bit, making the access a bit convoluted. Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2017-08-31irqchip/gic-v3-its: Add VPE irq domain [de]activationMarc Zyngier
On activation, a VPE is mapped using the VMAPP command, followed by a VINVALL for a good measure. On deactivation, the VPE is simply unmapped. Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2017-08-31irqchip/gic-v3-its: Add VPE irq domain allocation/teardownMarc Zyngier
When creating a VM, the low level GICv4 code is responsible for: - allocating each VPE a unique VPEID - allocating a doorbell interrupt for each VPE - allocating the pending tables for each VPE - allocating the property table for the VM This of course has to be reversed when the VM is brought down. All of this is wired into the irq domain alloc/free methods. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2017-08-31irqchip/gic-v3-its: Add VPE domain infrastructureMarc Zyngier
Add the basic GICv4 VPE (vcpu in GICv4 parlance) infrastructure (irqchip, irq domain) that is going to be populated in the following patches. Reviewed-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2017-08-31irqchip/gic-v3-its: Add VLPI configuration handlingMarc Zyngier
When a VLPI is reconfigured (enabled, disabled, change in priority), the full configuration byte must be written, and the caches invalidated. Also, when using the irq_mask/irq_unmask methods, it is necessary to disable the doorbell for that particular interrupt (by mapping it to 1023) on top of clearing the Enable bit. Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2017-08-31irqchip/gic-v3-its: Add VLPI map/unmap operationsMarc Zyngier
In order to let a VLPI being injected into a guest, the VLPI must be mapped using the VMAPTI command. When moved to a different vcpu, it must be moved with the VMOVI command. These commands are issued via the irq_set_vcpu_affinity method, making sure we unmap the corresponding host LPI first. The reverse is also done when the VLPI is unmapped from the guest. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2017-08-31irqchip/gic-v3-its: Add VLPI configuration hookMarc Zyngier
Add the skeleton irq_set_vcpu_affinity method that will be used to configure VLPIs. Reviewed-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2017-08-31irqchip/gic-v3-its: Add GICv4 ITS command definitionsMarc Zyngier
Add the new GICv4 ITS command definitions, most of them, being defined in terms of their physical counterparts. Reviewed-by: Eric Auger <eric.auger@redhat.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2017-08-31irqchip/gic-v4: Add management structure definitionsMarc Zyngier
Add a bunch of GICv4-specific data structures that will get used in subsequent patches. Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2017-08-31Merge branch 'clockevents/4.14' of ↵Thomas Gleixner
http://git.linaro.org/people/daniel.lezcano/linux into timers/core Pull clockevent updates from Daniel Lezcano: - Add the new imx-tpm driver (Dong Aisheng) - Remove DT deprecated binding for Renesas (Magnus Damm) - Remove error message on memory allocation (Markus Elfring) - Convert clocksource drivers to use %pOF
2017-08-31clocksource: Convert to using %pOF instead of full_nameRob Herring
Now that we have a custom printf format specifier, convert users of full_name to use %pOF instead. This is preparation to remove storing of the full path string for each node. Signed-off-by: Rob Herring <robh@kernel.org> Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Marc Gonzalez <marc_gonzalez@sigmadesigns.com> Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com> Cc: Alexandre Torgue <alexandre.torgue@st.com> Cc: linux-arm-kernel@lists.infradead.org Acked-by: Marc Gonzalez <marc_gonzalez@sigmadesigns.com> Acked-by: Alexandre TORGUE <alexandre.torgue@st.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2017-08-31Revert "pinctrl: sunxi: Don't enforce bias disable (for now)"Priit Laes
This reverts commit 2154d94b40ea2a5de05245521371d0461bb0d669. The original patch was intented to avoid some issues with the sunxi gpio rework and was supposed to be reverted after all the required DT bits had been merged around v4.10. Signed-off-by: Priit Laes <plaes@plaes.org> Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-08-31pinctrl: uniphier: fix members of rmii group for Pro4Kunihiko Hayashi
The ether_rmii_groups should have "ether_rmii" and "ether_rmiib" as members. This patch replaces to them. Fixes: 1e359ab1285e ("pinctrl: uniphier: add Ethernet pin-mux settings") Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com> Acked-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-08-31x86/idt: Remove superfluous ALIGNmentJiri Slaby
Commit 87e81786b13b ("x86/idt: Move early IDT setup out of 32-bit asm") switched early_ignore_irq to use ENTRY. ENTRY aligns the code, so there is no need for one more ALIGN right before the function. And add one \n after the function to separate it from the data. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Brian Gerst <brgerst@gmail.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Andy Lutomirski <luto@kernel.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Link: http://lkml.kernel.org/r/20170831121653.28917-1-jslaby@suse.cz
2017-08-31xen/mmu: set MMU_NORMAL_PT_UPDATE in remap_area_mfn_pte_fnWei Liu
No functional change because MMU_NORMAL_PT_UPDATE is in fact 0. Set it to make the code consistent with similar code in mmu_pv.c Signed-off-by: Wei Liu <wei.liu2@citrix.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
2017-08-31xen: Don't try to call xen_alloc_p2m_entry() on autotranslating guestsBoris Ostrovsky
Commit aba831a69632 ("xen: remove tests for pvh mode in pure pv paths") removed XENFEAT_auto_translated_physmap test in xen_alloc_p2m_entry() since it is assumed that the routine is never called by non-PV guests. However, alloc_xenballooned_pages() may make this call on a PVH guest. Prevent this from happening by adding XENFEAT_auto_translated_physmap check there. Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Reviewed-by: Juergen Gross <jgross@suse.com> Fixes: aba831a69632 ("xen: remove tests for pvh mode in pure pv paths")
2017-08-31xen/events: events_fifo: Don't use {get,put}_cpu() in xen_evtchn_fifo_init()Julien Grall
When booting Linux as Xen guest with CONFIG_DEBUG_ATOMIC, the following splat appears: [ 0.002323] Mountpoint-cache hash table entries: 1024 (order: 1, 8192 bytes) [ 0.019717] ASID allocator initialised with 65536 entries [ 0.020019] xen:grant_table: Grant tables using version 1 layout [ 0.020051] Grant table initialized [ 0.020069] BUG: sleeping function called from invalid context at /data/src/linux/mm/page_alloc.c:4046 [ 0.020100] in_atomic(): 1, irqs_disabled(): 0, pid: 1, name: swapper/0 [ 0.020123] no locks held by swapper/0/1. [ 0.020143] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.13.0-rc5 #598 [ 0.020166] Hardware name: FVP Base (DT) [ 0.020182] Call trace: [ 0.020199] [<ffff00000808a5c0>] dump_backtrace+0x0/0x270 [ 0.020222] [<ffff00000808a95c>] show_stack+0x24/0x30 [ 0.020244] [<ffff000008c1ef20>] dump_stack+0xb8/0xf0 [ 0.020267] [<ffff0000081128c0>] ___might_sleep+0x1c8/0x1f8 [ 0.020291] [<ffff000008112948>] __might_sleep+0x58/0x90 [ 0.020313] [<ffff0000082171b8>] __alloc_pages_nodemask+0x1c0/0x12e8 [ 0.020338] [<ffff00000827a110>] alloc_page_interleave+0x38/0x88 [ 0.020363] [<ffff00000827a904>] alloc_pages_current+0xdc/0xf0 [ 0.020387] [<ffff000008211f38>] __get_free_pages+0x28/0x50 [ 0.020411] [<ffff0000086566a4>] evtchn_fifo_alloc_control_block+0x2c/0xa0 [ 0.020437] [<ffff0000091747b0>] xen_evtchn_fifo_init+0x38/0xb4 [ 0.020461] [<ffff0000091746c0>] xen_init_IRQ+0x44/0xc8 [ 0.020484] [<ffff000009128adc>] xen_guest_init+0x250/0x300 [ 0.020507] [<ffff000008083974>] do_one_initcall+0x44/0x130 [ 0.020531] [<ffff000009120df8>] kernel_init_freeable+0x120/0x288 [ 0.020556] [<ffff000008c31ca8>] kernel_init+0x18/0x110 [ 0.020578] [<ffff000008083710>] ret_from_fork+0x10/0x40 [ 0.020606] xen:events: Using FIFO-based ABI [ 0.020658] Xen: initializing cpu0 [ 0.027727] Hierarchical SRCU implementation. [ 0.036235] EFI services will not be available. [ 0.043810] smp: Bringing up secondary CPUs ... This is because get_cpu() in xen_evtchn_fifo_init() will disable preemption, but __get_free_page() might sleep (GFP_ATOMIC is not set). xen_evtchn_fifo_init() will always be called before SMP is initialized, so {get,put}_cpu() could be replaced by a simple smp_processor_id(). This also avoid to modify evtchn_fifo_alloc_control_block that will be called in other context. Signed-off-by: Julien Grall <julien.grall@arm.com> Reported-by: Andre Przywara <andre.przywara@arm.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Fixes: 1fe565517b57 ("xen/events: use the FIFO-based ABI if available") Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
2017-08-31xen/pvcalls: use WARN_ON(1) instead of __WARN()Arnd Bergmann
__WARN() is an internal helper that is only available on some architectures, but causes a build error e.g. on ARM64 in some configurations: drivers/xen/pvcalls-back.c: In function 'set_backend_state': drivers/xen/pvcalls-back.c:1097:5: error: implicit declaration of function '__WARN' [-Werror=implicit-function-declaration] Unfortunately, there is no equivalent of BUG() that takes no arguments, but WARN_ON(1) is commonly used in other drivers and works on all configurations. Fixes: 7160378206b2 ("xen/pvcalls: xenbus state handling") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Stefano Stabellini <sstabellini@kernel.org> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
2017-08-31xen: remove not used trace functionsJuergen Gross
There are some Xen specific trace functions defined in include/trace/events/xen.h. Remove them. Signed-off-by: Juergen Gross <jgross@suse.com> Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
2017-08-31xen: remove unused function xen_set_domain_pte()Juergen Gross
The function xen_set_domain_pte() is used nowhere in the kernel. Remove it. Signed-off-by: Juergen Gross <jgross@suse.com> Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
2017-08-31xen: remove tests for pvh mode in pure pv pathsJuergen Gross
Remove the last tests for XENFEAT_auto_translated_physmap in pure PV-domain specific paths. PVH V1 is gone and the feature will always be "false" in PV guests. Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
2017-08-31xen-platform: constify pci_device_id.Arvind Yadav
pci_device_id are not supposed to change at runtime. All functions working with pci_device_id provided by <linux/pci.h> work with const pci_device_id. So mark the non-const structs as const. Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
2017-08-31xen: cleanup xen.hJuergen Gross
The macros for testing domain types are more complicated then they need to. Simplify them. Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
2017-08-31xen: introduce a Kconfig option to enable the pvcalls backendStefano Stabellini
Also add pvcalls-back to the Makefile. Signed-off-by: Stefano Stabellini <stefano@aporeto.com> Reviewed-by: Juergen Gross <jgross@suse.com> CC: boris.ostrovsky@oracle.com CC: jgross@suse.com Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
2017-08-31xen/pvcalls: implement writeStefano Stabellini
When the other end notifies us that there is data to be written (pvcalls_back_conn_event), increment the io and write counters, and schedule the ioworker. Implement the write function called by ioworker by reading the data from the data ring, writing it to the socket by calling inet_sendmsg. Set out_error on error. Signed-off-by: Stefano Stabellini <stefano@aporeto.com> Reviewed-by: Juergen Gross <jgross@suse.com> CC: boris.ostrovsky@oracle.com CC: jgross@suse.com Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
2017-08-31xen/pvcalls: implement readStefano Stabellini
When an active socket has data available, increment the io and read counters, and schedule the ioworker. Implement the read function by reading from the socket, writing the data to the data ring. Set in_error on error. Signed-off-by: Stefano Stabellini <stefano@aporeto.com> Reviewed-by: Juergen Gross <jgross@suse.com> CC: boris.ostrovsky@oracle.com CC: jgross@suse.com Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
2017-08-31xen/pvcalls: implement the ioworker functionsStefano Stabellini
We have one ioworker per socket. Each ioworker goes through the list of outstanding read/write requests. Once all requests have been dealt with, it returns. We use one atomic counter per socket for "read" operations and one for "write" operations to keep track of the reads/writes to do. We also use one atomic counter ("io") per ioworker to keep track of how many outstanding requests we have in total assigned to the ioworker. The ioworker finishes when there are none. Signed-off-by: Stefano Stabellini <stefano@aporeto.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Reviewed-by: Juergen Gross <jgross@suse.com> CC: boris.ostrovsky@oracle.com CC: jgross@suse.com Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
2017-08-31xen/pvcalls: disconnect and module_exitStefano Stabellini
Implement backend_disconnect. Call pvcalls_back_release_active on active sockets and pvcalls_back_release_passive on passive sockets. Implement module_exit by calling backend_disconnect on frontend connections. [ boris: fixed long lines ] Signed-off-by: Stefano Stabellini <stefano@aporeto.com> Reviewed-by: Juergen Gross <jgross@suse.com> CC: boris.ostrovsky@oracle.com CC: jgross@suse.com Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
2017-08-31xen/pvcalls: implement release commandStefano Stabellini
Release both active and passive sockets. For active sockets, make sure to avoid possible conflicts with the ioworker reading/writing to those sockets concurrently. Set map->release to let the ioworker know atomically that the socket will be released soon, then wait until the ioworker finishes (flush_work). Unmap indexes pages and data rings. Signed-off-by: Stefano Stabellini <stefano@aporeto.com> Reviewed-by: Juergen Gross <jgross@suse.com> CC: boris.ostrovsky@oracle.com CC: jgross@suse.com Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
2017-08-31xen/pvcalls: implement poll commandStefano Stabellini
Implement poll on passive sockets by requesting a delayed response with mappass->reqcopy, and reply back when there is data on the passive socket. Poll on active socket is unimplemented as by the spec, as the frontend should just wait for events and check the indexes on the indexes page. Only support one outstanding poll (or accept) request for every passive socket at any given time. [ boris: fixed long lines ] Signed-off-by: Stefano Stabellini <stefano@aporeto.com> Reviewed-by: Juergen Gross <jgross@suse.com> CC: boris.ostrovsky@oracle.com CC: jgross@suse.com Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
2017-08-31xen/pvcalls: implement accept commandStefano Stabellini
Implement the accept command by calling inet_accept. To avoid blocking in the kernel, call inet_accept(O_NONBLOCK) from a workqueue, which get scheduled on sk_data_ready (for a passive socket, it means that there are connections to accept). Use the reqcopy field to store the request. Accept the new socket from the delayed work function, create a new sock_mapping for it, map the indexes page and data ring, and reply to the other end. Allocate an ioworker for the socket. Only support one outstanding blocking accept request for every socket at any time. Add a field to sock_mapping to remember the passive socket from which an active socket was created. [ boris: fixed whitespaces ] Signed-off-by: Stefano Stabellini <stefano@aporeto.com> Reviewed-by: Juergen Gross <jgross@suse.com> CC: boris.ostrovsky@oracle.com CC: jgross@suse.com Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
2017-08-31xen/pvcalls: implement listen commandStefano Stabellini
Call inet_listen to implement the listen command. Signed-off-by: Stefano Stabellini <stefano@aporeto.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Reviewed-by: Juergen Gross <jgross@suse.com> CC: boris.ostrovsky@oracle.com CC: jgross@suse.com Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
2017-08-31xen/pvcalls: implement bind commandStefano Stabellini
Allocate a socket. Track the allocated passive sockets with a new data structure named sockpass_mapping. It contains an unbound workqueue to schedule delayed work for the accept and poll commands. It also has a reqcopy field to be used to store a copy of a request for delayed work. Reads/writes to it are protected by a lock (the "copy_lock" spinlock). Initialize the workqueue in pvcalls_back_bind. Implement the bind command with inet_bind. The pass_sk_data_ready event handler will be added later. Signed-off-by: Stefano Stabellini <stefano@aporeto.com> Reviewed-by: Juergen Gross <jgross@suse.com> CC: boris.ostrovsky@oracle.com CC: jgross@suse.com Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
2017-08-31xen/pvcalls: implement connect commandStefano Stabellini
Allocate a socket. Keep track of socket <-> ring mappings with a new data structure, called sock_mapping. Implement the connect command by calling inet_stream_connect, and mapping the new indexes page and data ring. Allocate a workqueue and a work_struct, called ioworker, to perform reads and writes to the socket. When an active socket is closed (sk_state_change), set in_error to -ENOTCONN and notify the other end, as specified by the protocol. sk_data_ready and pvcalls_back_ioworker will be implemented later. [ boris: fixed whitespaces ] Signed-off-by: Stefano Stabellini <stefano@aporeto.com> Reviewed-by: Juergen Gross <jgross@suse.com> CC: boris.ostrovsky@oracle.com CC: jgross@suse.com Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
2017-08-31xen/pvcalls: implement socket commandStefano Stabellini
Just reply with success to the other end for now. Delay the allocation of the actual socket to bind and/or connect. Signed-off-by: Stefano Stabellini <stefano@aporeto.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Reviewed-by: Juergen Gross <jgross@suse.com> CC: boris.ostrovsky@oracle.com CC: jgross@suse.com Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
2017-08-31xen/pvcalls: handle commands from the frontendStefano Stabellini
When the other end notifies us that there are commands to be read (pvcalls_back_event), wake up the backend thread to parse the command. The command ring works like most other Xen rings, so use the usual ring macros to read and write to it. The functions implementing the commands are empty stubs for now. [ boris: fixed whitespaces ] Signed-off-by: Stefano Stabellini <stefano@aporeto.com> Reviewed-by: Juergen Gross <jgross@suse.com> CC: boris.ostrovsky@oracle.com CC: jgross@suse.com Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
2017-08-31xen/pvcalls: connect to a frontendStefano Stabellini
Introduce a per-frontend data structure named pvcalls_fedata. It contains pointers to the command ring, its event channel, a list of active sockets and a tree of passive sockets (passing sockets need to be looked up from the id on listen, accept and poll commands, while active sockets only on release). It also has an unbound workqueue to schedule the work of parsing and executing commands on the command ring. socket_lock protects the two lists. In pvcalls_back_global, keep a list of connected frontends. [ boris: fixed whitespaces/long lines ] Signed-off-by: Stefano Stabellini <stefano@aporeto.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Reviewed-by: Juergen Gross <jgross@suse.com> CC: boris.ostrovsky@oracle.com CC: jgross@suse.com Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
2017-08-31xen/pvcalls: xenbus state handlingStefano Stabellini
Introduce the code to handle xenbus state changes. Implement the probe function for the pvcalls backend. Write the supported versions, max-page-order and function-calls nodes to xenstore, as required by the protocol. Introduce stub functions for disconnecting/connecting to a frontend. Signed-off-by: Stefano Stabellini <stefano@aporeto.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Reviewed-by: Juergen Gross <jgross@suse.com> CC: boris.ostrovsky@oracle.com CC: jgross@suse.com Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
2017-08-31xen/pvcalls: initialize the module and register the xenbus backendStefano Stabellini
Keep a list of connected frontends. Use a semaphore to protect list accesses. Signed-off-by: Stefano Stabellini <stefano@aporeto.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Reviewed-by: Juergen Gross <jgross@suse.com> CC: boris.ostrovsky@oracle.com CC: jgross@suse.com Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
generated by cgit (git 2.34.1) at 2025-09-16 08:07:11 +0000