2009-08-26 13:57:50 +02:00
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/*
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* Kernel-based Virtual Machine - device assignment support
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*
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2010-05-23 17:37:00 +02:00
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* Copyright (C) 2010 Red Hat, Inc. and/or its affiliates.
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2009-08-26 13:57:50 +02:00
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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*/
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#include <linux/kvm_host.h>
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#include <linux/kvm.h>
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#include <linux/uaccess.h>
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#include <linux/vmalloc.h>
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#include <linux/errno.h>
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#include <linux/spinlock.h>
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#include <linux/pci.h>
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#include <linux/interrupt.h>
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include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.
percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.
http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.
* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.
* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.
The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.
2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.
3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.
4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.
5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.
6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).
* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig
8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.
Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 09:04:11 +01:00
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#include <linux/slab.h>
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2009-08-26 13:57:50 +02:00
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#include "irq.h"
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static struct kvm_assigned_dev_kernel *kvm_find_assigned_dev(struct list_head *head,
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int assigned_dev_id)
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{
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struct list_head *ptr;
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struct kvm_assigned_dev_kernel *match;
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list_for_each(ptr, head) {
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match = list_entry(ptr, struct kvm_assigned_dev_kernel, list);
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if (match->assigned_dev_id == assigned_dev_id)
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return match;
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}
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return NULL;
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}
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static int find_index_from_host_irq(struct kvm_assigned_dev_kernel
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*assigned_dev, int irq)
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{
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int i, index;
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struct msix_entry *host_msix_entries;
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host_msix_entries = assigned_dev->host_msix_entries;
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index = -1;
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for (i = 0; i < assigned_dev->entries_nr; i++)
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if (irq == host_msix_entries[i].vector) {
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index = i;
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break;
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}
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if (index < 0) {
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printk(KERN_WARNING "Fail to find correlated MSI-X entry!\n");
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return 0;
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}
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return index;
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}
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2010-11-16 22:30:03 +01:00
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static irqreturn_t kvm_assigned_dev_thread(int irq, void *dev_id)
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2009-08-26 13:57:50 +02:00
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{
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2010-11-16 22:30:03 +01:00
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struct kvm_assigned_dev_kernel *assigned_dev = dev_id;
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2009-08-26 13:57:50 +02:00
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2010-11-16 22:30:03 +01:00
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if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_INTX) {
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spin_lock(&assigned_dev->intx_lock);
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disable_irq_nosync(irq);
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assigned_dev->host_irq_disabled = true;
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spin_unlock(&assigned_dev->intx_lock);
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}
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2009-08-26 13:57:50 +02:00
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2011-09-12 18:57:56 +02:00
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kvm_set_irq(assigned_dev->kvm, assigned_dev->irq_source_id,
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assigned_dev->guest_irq, 1);
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return IRQ_HANDLED;
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}
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#ifdef __KVM_HAVE_MSIX
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static irqreturn_t kvm_assigned_dev_thread_msix(int irq, void *dev_id)
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{
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struct kvm_assigned_dev_kernel *assigned_dev = dev_id;
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int index = find_index_from_host_irq(assigned_dev, irq);
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u32 vector;
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if (index >= 0) {
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vector = assigned_dev->guest_msix_entries[index].vector;
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2009-08-26 13:57:50 +02:00
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kvm_set_irq(assigned_dev->kvm, assigned_dev->irq_source_id,
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2011-09-12 18:57:56 +02:00
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vector, 1);
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}
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2009-08-26 13:57:50 +02:00
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return IRQ_HANDLED;
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}
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2011-09-12 18:57:56 +02:00
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#endif
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2009-08-26 13:57:50 +02:00
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/* Ack the irq line for an assigned device */
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static void kvm_assigned_dev_ack_irq(struct kvm_irq_ack_notifier *kian)
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{
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2011-09-11 10:16:20 +02:00
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struct kvm_assigned_dev_kernel *dev =
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container_of(kian, struct kvm_assigned_dev_kernel,
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ack_notifier);
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2009-08-26 13:57:50 +02:00
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kvm_set_irq(dev->kvm, dev->irq_source_id, dev->guest_irq, 0);
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/* The guest irq may be shared so this ack may be
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* from another device.
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*/
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2010-11-16 22:30:03 +01:00
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spin_lock(&dev->intx_lock);
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2009-08-26 13:57:50 +02:00
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if (dev->host_irq_disabled) {
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enable_irq(dev->host_irq);
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dev->host_irq_disabled = false;
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}
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2010-11-16 22:30:03 +01:00
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spin_unlock(&dev->intx_lock);
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2009-08-26 13:57:50 +02:00
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}
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static void deassign_guest_irq(struct kvm *kvm,
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struct kvm_assigned_dev_kernel *assigned_dev)
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{
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2011-09-11 10:16:20 +02:00
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if (assigned_dev->ack_notifier.gsi != -1)
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kvm_unregister_irq_ack_notifier(kvm,
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&assigned_dev->ack_notifier);
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2009-08-26 13:57:50 +02:00
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2010-11-16 22:30:02 +01:00
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kvm_set_irq(assigned_dev->kvm, assigned_dev->irq_source_id,
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assigned_dev->guest_irq, 0);
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2009-08-26 13:57:50 +02:00
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if (assigned_dev->irq_source_id != -1)
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kvm_free_irq_source_id(kvm, assigned_dev->irq_source_id);
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assigned_dev->irq_source_id = -1;
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assigned_dev->irq_requested_type &= ~(KVM_DEV_IRQ_GUEST_MASK);
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}
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/* The function implicit hold kvm->lock mutex due to cancel_work_sync() */
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static void deassign_host_irq(struct kvm *kvm,
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struct kvm_assigned_dev_kernel *assigned_dev)
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{
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/*
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2010-11-16 22:30:03 +01:00
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* We disable irq here to prevent further events.
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2009-08-26 13:57:50 +02:00
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*
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* Notice this maybe result in nested disable if the interrupt type is
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* INTx, but it's OK for we are going to free it.
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*
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* If this function is a part of VM destroy, please ensure that till
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* now, the kvm state is still legal for probably we also have to wait
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2010-11-16 22:30:03 +01:00
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* on a currently running IRQ handler.
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2009-08-26 13:57:50 +02:00
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*/
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if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_MSIX) {
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int i;
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for (i = 0; i < assigned_dev->entries_nr; i++)
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2010-11-16 22:30:03 +01:00
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disable_irq(assigned_dev->host_msix_entries[i].vector);
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2009-08-26 13:57:50 +02:00
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for (i = 0; i < assigned_dev->entries_nr; i++)
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free_irq(assigned_dev->host_msix_entries[i].vector,
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2011-09-11 10:16:16 +02:00
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assigned_dev);
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2009-08-26 13:57:50 +02:00
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assigned_dev->entries_nr = 0;
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kfree(assigned_dev->host_msix_entries);
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kfree(assigned_dev->guest_msix_entries);
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pci_disable_msix(assigned_dev->dev);
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} else {
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/* Deal with MSI and INTx */
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2010-11-16 22:30:03 +01:00
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disable_irq(assigned_dev->host_irq);
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2009-08-26 13:57:50 +02:00
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2011-09-11 10:16:16 +02:00
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free_irq(assigned_dev->host_irq, assigned_dev);
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2009-08-26 13:57:50 +02:00
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if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_MSI)
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pci_disable_msi(assigned_dev->dev);
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}
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assigned_dev->irq_requested_type &= ~(KVM_DEV_IRQ_HOST_MASK);
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}
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static int kvm_deassign_irq(struct kvm *kvm,
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struct kvm_assigned_dev_kernel *assigned_dev,
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unsigned long irq_requested_type)
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{
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unsigned long guest_irq_type, host_irq_type;
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if (!irqchip_in_kernel(kvm))
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return -EINVAL;
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/* no irq assignment to deassign */
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if (!assigned_dev->irq_requested_type)
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return -ENXIO;
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host_irq_type = irq_requested_type & KVM_DEV_IRQ_HOST_MASK;
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guest_irq_type = irq_requested_type & KVM_DEV_IRQ_GUEST_MASK;
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if (host_irq_type)
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deassign_host_irq(kvm, assigned_dev);
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if (guest_irq_type)
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deassign_guest_irq(kvm, assigned_dev);
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return 0;
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}
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static void kvm_free_assigned_irq(struct kvm *kvm,
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struct kvm_assigned_dev_kernel *assigned_dev)
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{
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kvm_deassign_irq(kvm, assigned_dev, assigned_dev->irq_requested_type);
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}
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static void kvm_free_assigned_device(struct kvm *kvm,
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struct kvm_assigned_dev_kernel
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*assigned_dev)
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{
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kvm_free_assigned_irq(kvm, assigned_dev);
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2011-05-10 18:02:39 +02:00
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pci_reset_function(assigned_dev->dev);
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if (pci_load_and_free_saved_state(assigned_dev->dev,
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&assigned_dev->pci_saved_state))
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printk(KERN_INFO "%s: Couldn't reload %s saved state\n",
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__func__, dev_name(&assigned_dev->dev->dev));
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else
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pci_restore_state(assigned_dev->dev);
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2009-08-26 13:57:50 +02:00
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2011-07-22 07:46:07 +02:00
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assigned_dev->dev->dev_flags &= ~PCI_DEV_FLAGS_ASSIGNED;
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2009-08-26 13:57:50 +02:00
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pci_release_regions(assigned_dev->dev);
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pci_disable_device(assigned_dev->dev);
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pci_dev_put(assigned_dev->dev);
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list_del(&assigned_dev->list);
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kfree(assigned_dev);
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}
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void kvm_free_all_assigned_devices(struct kvm *kvm)
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{
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struct list_head *ptr, *ptr2;
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struct kvm_assigned_dev_kernel *assigned_dev;
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list_for_each_safe(ptr, ptr2, &kvm->arch.assigned_dev_head) {
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assigned_dev = list_entry(ptr,
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struct kvm_assigned_dev_kernel,
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list);
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kvm_free_assigned_device(kvm, assigned_dev);
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}
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}
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static int assigned_device_enable_host_intx(struct kvm *kvm,
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struct kvm_assigned_dev_kernel *dev)
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{
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dev->host_irq = dev->dev->irq;
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/* Even though this is PCI, we don't want to use shared
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* interrupts. Sharing host devices with guest-assigned devices
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* on the same interrupt line is not a happy situation: there
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* are going to be long delays in accepting, acking, etc.
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*/
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2010-11-16 22:30:03 +01:00
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if (request_threaded_irq(dev->host_irq, NULL, kvm_assigned_dev_thread,
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2011-09-11 10:16:16 +02:00
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IRQF_ONESHOT, dev->irq_name, dev))
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2009-08-26 13:57:50 +02:00
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return -EIO;
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return 0;
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}
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#ifdef __KVM_HAVE_MSI
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static int assigned_device_enable_host_msi(struct kvm *kvm,
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struct kvm_assigned_dev_kernel *dev)
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{
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int r;
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if (!dev->dev->msi_enabled) {
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r = pci_enable_msi(dev->dev);
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if (r)
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return r;
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}
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dev->host_irq = dev->dev->irq;
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2010-11-16 22:30:03 +01:00
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if (request_threaded_irq(dev->host_irq, NULL, kvm_assigned_dev_thread,
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2011-09-11 10:16:16 +02:00
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0, dev->irq_name, dev)) {
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2009-08-26 13:57:50 +02:00
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pci_disable_msi(dev->dev);
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return -EIO;
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}
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return 0;
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}
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#endif
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#ifdef __KVM_HAVE_MSIX
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static int assigned_device_enable_host_msix(struct kvm *kvm,
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struct kvm_assigned_dev_kernel *dev)
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{
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int i, r = -EINVAL;
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|
|
|
|
/* host_msix_entries and guest_msix_entries should have been
|
|
|
|
* initialized */
|
|
|
|
if (dev->entries_nr == 0)
|
|
|
|
return r;
|
|
|
|
|
|
|
|
r = pci_enable_msix(dev->dev, dev->host_msix_entries, dev->entries_nr);
|
|
|
|
if (r)
|
|
|
|
return r;
|
|
|
|
|
|
|
|
for (i = 0; i < dev->entries_nr; i++) {
|
2010-11-16 22:30:03 +01:00
|
|
|
r = request_threaded_irq(dev->host_msix_entries[i].vector,
|
2011-09-12 18:57:56 +02:00
|
|
|
NULL, kvm_assigned_dev_thread_msix,
|
2011-09-11 10:16:16 +02:00
|
|
|
0, dev->irq_name, dev);
|
2009-08-26 13:57:50 +02:00
|
|
|
if (r)
|
2010-03-13 08:00:45 +01:00
|
|
|
goto err;
|
2009-08-26 13:57:50 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
2010-03-13 08:00:45 +01:00
|
|
|
err:
|
|
|
|
for (i -= 1; i >= 0; i--)
|
2011-09-11 10:16:16 +02:00
|
|
|
free_irq(dev->host_msix_entries[i].vector, dev);
|
2010-03-13 08:00:45 +01:00
|
|
|
pci_disable_msix(dev->dev);
|
|
|
|
return r;
|
2009-08-26 13:57:50 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
static int assigned_device_enable_guest_intx(struct kvm *kvm,
|
|
|
|
struct kvm_assigned_dev_kernel *dev,
|
|
|
|
struct kvm_assigned_irq *irq)
|
|
|
|
{
|
|
|
|
dev->guest_irq = irq->guest_irq;
|
|
|
|
dev->ack_notifier.gsi = irq->guest_irq;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef __KVM_HAVE_MSI
|
|
|
|
static int assigned_device_enable_guest_msi(struct kvm *kvm,
|
|
|
|
struct kvm_assigned_dev_kernel *dev,
|
|
|
|
struct kvm_assigned_irq *irq)
|
|
|
|
{
|
|
|
|
dev->guest_irq = irq->guest_irq;
|
|
|
|
dev->ack_notifier.gsi = -1;
|
|
|
|
dev->host_irq_disabled = false;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
#ifdef __KVM_HAVE_MSIX
|
|
|
|
static int assigned_device_enable_guest_msix(struct kvm *kvm,
|
|
|
|
struct kvm_assigned_dev_kernel *dev,
|
|
|
|
struct kvm_assigned_irq *irq)
|
|
|
|
{
|
|
|
|
dev->guest_irq = irq->guest_irq;
|
|
|
|
dev->ack_notifier.gsi = -1;
|
|
|
|
dev->host_irq_disabled = false;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
static int assign_host_irq(struct kvm *kvm,
|
|
|
|
struct kvm_assigned_dev_kernel *dev,
|
|
|
|
__u32 host_irq_type)
|
|
|
|
{
|
|
|
|
int r = -EEXIST;
|
|
|
|
|
|
|
|
if (dev->irq_requested_type & KVM_DEV_IRQ_HOST_MASK)
|
|
|
|
return r;
|
|
|
|
|
2010-11-16 22:30:04 +01:00
|
|
|
snprintf(dev->irq_name, sizeof(dev->irq_name), "kvm:%s",
|
|
|
|
pci_name(dev->dev));
|
|
|
|
|
2009-08-26 13:57:50 +02:00
|
|
|
switch (host_irq_type) {
|
|
|
|
case KVM_DEV_IRQ_HOST_INTX:
|
|
|
|
r = assigned_device_enable_host_intx(kvm, dev);
|
|
|
|
break;
|
|
|
|
#ifdef __KVM_HAVE_MSI
|
|
|
|
case KVM_DEV_IRQ_HOST_MSI:
|
|
|
|
r = assigned_device_enable_host_msi(kvm, dev);
|
|
|
|
break;
|
|
|
|
#endif
|
|
|
|
#ifdef __KVM_HAVE_MSIX
|
|
|
|
case KVM_DEV_IRQ_HOST_MSIX:
|
|
|
|
r = assigned_device_enable_host_msix(kvm, dev);
|
|
|
|
break;
|
|
|
|
#endif
|
|
|
|
default:
|
|
|
|
r = -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!r)
|
|
|
|
dev->irq_requested_type |= host_irq_type;
|
|
|
|
|
|
|
|
return r;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int assign_guest_irq(struct kvm *kvm,
|
|
|
|
struct kvm_assigned_dev_kernel *dev,
|
|
|
|
struct kvm_assigned_irq *irq,
|
|
|
|
unsigned long guest_irq_type)
|
|
|
|
{
|
|
|
|
int id;
|
|
|
|
int r = -EEXIST;
|
|
|
|
|
|
|
|
if (dev->irq_requested_type & KVM_DEV_IRQ_GUEST_MASK)
|
|
|
|
return r;
|
|
|
|
|
|
|
|
id = kvm_request_irq_source_id(kvm);
|
|
|
|
if (id < 0)
|
|
|
|
return id;
|
|
|
|
|
|
|
|
dev->irq_source_id = id;
|
|
|
|
|
|
|
|
switch (guest_irq_type) {
|
|
|
|
case KVM_DEV_IRQ_GUEST_INTX:
|
|
|
|
r = assigned_device_enable_guest_intx(kvm, dev, irq);
|
|
|
|
break;
|
|
|
|
#ifdef __KVM_HAVE_MSI
|
|
|
|
case KVM_DEV_IRQ_GUEST_MSI:
|
|
|
|
r = assigned_device_enable_guest_msi(kvm, dev, irq);
|
|
|
|
break;
|
|
|
|
#endif
|
|
|
|
#ifdef __KVM_HAVE_MSIX
|
|
|
|
case KVM_DEV_IRQ_GUEST_MSIX:
|
|
|
|
r = assigned_device_enable_guest_msix(kvm, dev, irq);
|
|
|
|
break;
|
|
|
|
#endif
|
|
|
|
default:
|
|
|
|
r = -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!r) {
|
|
|
|
dev->irq_requested_type |= guest_irq_type;
|
2011-09-11 10:16:20 +02:00
|
|
|
if (dev->ack_notifier.gsi != -1)
|
|
|
|
kvm_register_irq_ack_notifier(kvm, &dev->ack_notifier);
|
2009-08-26 13:57:50 +02:00
|
|
|
} else
|
|
|
|
kvm_free_irq_source_id(kvm, dev->irq_source_id);
|
|
|
|
|
|
|
|
return r;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* TODO Deal with KVM_DEV_IRQ_ASSIGNED_MASK_MSIX */
|
|
|
|
static int kvm_vm_ioctl_assign_irq(struct kvm *kvm,
|
|
|
|
struct kvm_assigned_irq *assigned_irq)
|
|
|
|
{
|
|
|
|
int r = -EINVAL;
|
|
|
|
struct kvm_assigned_dev_kernel *match;
|
|
|
|
unsigned long host_irq_type, guest_irq_type;
|
|
|
|
|
|
|
|
if (!irqchip_in_kernel(kvm))
|
|
|
|
return r;
|
|
|
|
|
|
|
|
mutex_lock(&kvm->lock);
|
|
|
|
r = -ENODEV;
|
|
|
|
match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
|
|
|
|
assigned_irq->assigned_dev_id);
|
|
|
|
if (!match)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
host_irq_type = (assigned_irq->flags & KVM_DEV_IRQ_HOST_MASK);
|
|
|
|
guest_irq_type = (assigned_irq->flags & KVM_DEV_IRQ_GUEST_MASK);
|
|
|
|
|
|
|
|
r = -EINVAL;
|
|
|
|
/* can only assign one type at a time */
|
|
|
|
if (hweight_long(host_irq_type) > 1)
|
|
|
|
goto out;
|
|
|
|
if (hweight_long(guest_irq_type) > 1)
|
|
|
|
goto out;
|
|
|
|
if (host_irq_type == 0 && guest_irq_type == 0)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
r = 0;
|
|
|
|
if (host_irq_type)
|
|
|
|
r = assign_host_irq(kvm, match, host_irq_type);
|
|
|
|
if (r)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
if (guest_irq_type)
|
|
|
|
r = assign_guest_irq(kvm, match, assigned_irq, guest_irq_type);
|
|
|
|
out:
|
|
|
|
mutex_unlock(&kvm->lock);
|
|
|
|
return r;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int kvm_vm_ioctl_deassign_dev_irq(struct kvm *kvm,
|
|
|
|
struct kvm_assigned_irq
|
|
|
|
*assigned_irq)
|
|
|
|
{
|
|
|
|
int r = -ENODEV;
|
|
|
|
struct kvm_assigned_dev_kernel *match;
|
|
|
|
|
|
|
|
mutex_lock(&kvm->lock);
|
|
|
|
|
|
|
|
match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
|
|
|
|
assigned_irq->assigned_dev_id);
|
|
|
|
if (!match)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
r = kvm_deassign_irq(kvm, match, assigned_irq->flags);
|
|
|
|
out:
|
|
|
|
mutex_unlock(&kvm->lock);
|
|
|
|
return r;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int kvm_vm_ioctl_assign_device(struct kvm *kvm,
|
|
|
|
struct kvm_assigned_pci_dev *assigned_dev)
|
|
|
|
{
|
2009-12-23 17:35:21 +01:00
|
|
|
int r = 0, idx;
|
2009-08-26 13:57:50 +02:00
|
|
|
struct kvm_assigned_dev_kernel *match;
|
|
|
|
struct pci_dev *dev;
|
|
|
|
|
2011-12-21 05:59:03 +01:00
|
|
|
if (!(assigned_dev->flags & KVM_DEV_ASSIGN_ENABLE_IOMMU))
|
|
|
|
return -EINVAL;
|
|
|
|
|
2009-08-26 13:57:50 +02:00
|
|
|
mutex_lock(&kvm->lock);
|
2009-12-23 17:35:21 +01:00
|
|
|
idx = srcu_read_lock(&kvm->srcu);
|
2009-08-26 13:57:50 +02:00
|
|
|
|
|
|
|
match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
|
|
|
|
assigned_dev->assigned_dev_id);
|
|
|
|
if (match) {
|
|
|
|
/* device already assigned */
|
|
|
|
r = -EEXIST;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
match = kzalloc(sizeof(struct kvm_assigned_dev_kernel), GFP_KERNEL);
|
|
|
|
if (match == NULL) {
|
|
|
|
printk(KERN_INFO "%s: Couldn't allocate memory\n",
|
|
|
|
__func__);
|
|
|
|
r = -ENOMEM;
|
|
|
|
goto out;
|
|
|
|
}
|
2010-01-29 07:38:44 +01:00
|
|
|
dev = pci_get_domain_bus_and_slot(assigned_dev->segnr,
|
|
|
|
assigned_dev->busnr,
|
2009-08-26 13:57:50 +02:00
|
|
|
assigned_dev->devfn);
|
|
|
|
if (!dev) {
|
|
|
|
printk(KERN_INFO "%s: host device not found\n", __func__);
|
|
|
|
r = -EINVAL;
|
|
|
|
goto out_free;
|
|
|
|
}
|
|
|
|
if (pci_enable_device(dev)) {
|
|
|
|
printk(KERN_INFO "%s: Could not enable PCI device\n", __func__);
|
|
|
|
r = -EBUSY;
|
|
|
|
goto out_put;
|
|
|
|
}
|
|
|
|
r = pci_request_regions(dev, "kvm_assigned_device");
|
|
|
|
if (r) {
|
|
|
|
printk(KERN_INFO "%s: Could not get access to device regions\n",
|
|
|
|
__func__);
|
|
|
|
goto out_disable;
|
|
|
|
}
|
|
|
|
|
|
|
|
pci_reset_function(dev);
|
2010-11-16 22:30:05 +01:00
|
|
|
pci_save_state(dev);
|
2011-05-10 18:02:39 +02:00
|
|
|
match->pci_saved_state = pci_store_saved_state(dev);
|
|
|
|
if (!match->pci_saved_state)
|
|
|
|
printk(KERN_DEBUG "%s: Couldn't store %s saved state\n",
|
|
|
|
__func__, dev_name(&dev->dev));
|
2009-08-26 13:57:50 +02:00
|
|
|
match->assigned_dev_id = assigned_dev->assigned_dev_id;
|
2010-01-29 07:38:44 +01:00
|
|
|
match->host_segnr = assigned_dev->segnr;
|
2009-08-26 13:57:50 +02:00
|
|
|
match->host_busnr = assigned_dev->busnr;
|
|
|
|
match->host_devfn = assigned_dev->devfn;
|
|
|
|
match->flags = assigned_dev->flags;
|
|
|
|
match->dev = dev;
|
2010-11-16 22:30:03 +01:00
|
|
|
spin_lock_init(&match->intx_lock);
|
2009-08-26 13:57:50 +02:00
|
|
|
match->irq_source_id = -1;
|
|
|
|
match->kvm = kvm;
|
|
|
|
match->ack_notifier.irq_acked = kvm_assigned_dev_ack_irq;
|
|
|
|
|
|
|
|
list_add(&match->list, &kvm->arch.assigned_dev_head);
|
|
|
|
|
2011-12-21 05:59:03 +01:00
|
|
|
if (!kvm->arch.iommu_domain) {
|
|
|
|
r = kvm_iommu_map_guest(kvm);
|
2009-08-26 13:57:50 +02:00
|
|
|
if (r)
|
|
|
|
goto out_list_del;
|
|
|
|
}
|
2011-12-21 05:59:03 +01:00
|
|
|
r = kvm_assign_device(kvm, match);
|
|
|
|
if (r)
|
|
|
|
goto out_list_del;
|
2009-08-26 13:57:50 +02:00
|
|
|
|
|
|
|
out:
|
2009-12-23 17:35:21 +01:00
|
|
|
srcu_read_unlock(&kvm->srcu, idx);
|
2009-12-15 03:28:07 +01:00
|
|
|
mutex_unlock(&kvm->lock);
|
2009-08-26 13:57:50 +02:00
|
|
|
return r;
|
|
|
|
out_list_del:
|
2011-05-10 18:02:39 +02:00
|
|
|
if (pci_load_and_free_saved_state(dev, &match->pci_saved_state))
|
|
|
|
printk(KERN_INFO "%s: Couldn't reload %s saved state\n",
|
|
|
|
__func__, dev_name(&dev->dev));
|
2009-08-26 13:57:50 +02:00
|
|
|
list_del(&match->list);
|
|
|
|
pci_release_regions(dev);
|
|
|
|
out_disable:
|
|
|
|
pci_disable_device(dev);
|
|
|
|
out_put:
|
|
|
|
pci_dev_put(dev);
|
|
|
|
out_free:
|
|
|
|
kfree(match);
|
2009-12-23 17:35:21 +01:00
|
|
|
srcu_read_unlock(&kvm->srcu, idx);
|
2009-12-15 03:28:07 +01:00
|
|
|
mutex_unlock(&kvm->lock);
|
2009-08-26 13:57:50 +02:00
|
|
|
return r;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int kvm_vm_ioctl_deassign_device(struct kvm *kvm,
|
|
|
|
struct kvm_assigned_pci_dev *assigned_dev)
|
|
|
|
{
|
|
|
|
int r = 0;
|
|
|
|
struct kvm_assigned_dev_kernel *match;
|
|
|
|
|
|
|
|
mutex_lock(&kvm->lock);
|
|
|
|
|
|
|
|
match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
|
|
|
|
assigned_dev->assigned_dev_id);
|
|
|
|
if (!match) {
|
|
|
|
printk(KERN_INFO "%s: device hasn't been assigned before, "
|
|
|
|
"so cannot be deassigned\n", __func__);
|
|
|
|
r = -EINVAL;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
2011-12-21 05:59:03 +01:00
|
|
|
kvm_deassign_device(kvm, match);
|
2009-08-26 13:57:50 +02:00
|
|
|
|
|
|
|
kvm_free_assigned_device(kvm, match);
|
|
|
|
|
|
|
|
out:
|
|
|
|
mutex_unlock(&kvm->lock);
|
|
|
|
return r;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
#ifdef __KVM_HAVE_MSIX
|
|
|
|
static int kvm_vm_ioctl_set_msix_nr(struct kvm *kvm,
|
|
|
|
struct kvm_assigned_msix_nr *entry_nr)
|
|
|
|
{
|
|
|
|
int r = 0;
|
|
|
|
struct kvm_assigned_dev_kernel *adev;
|
|
|
|
|
|
|
|
mutex_lock(&kvm->lock);
|
|
|
|
|
|
|
|
adev = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
|
|
|
|
entry_nr->assigned_dev_id);
|
|
|
|
if (!adev) {
|
|
|
|
r = -EINVAL;
|
|
|
|
goto msix_nr_out;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (adev->entries_nr == 0) {
|
|
|
|
adev->entries_nr = entry_nr->entry_nr;
|
|
|
|
if (adev->entries_nr == 0 ||
|
2011-06-11 12:23:55 +02:00
|
|
|
adev->entries_nr > KVM_MAX_MSIX_PER_DEV) {
|
2009-08-26 13:57:50 +02:00
|
|
|
r = -EINVAL;
|
|
|
|
goto msix_nr_out;
|
|
|
|
}
|
|
|
|
|
|
|
|
adev->host_msix_entries = kzalloc(sizeof(struct msix_entry) *
|
|
|
|
entry_nr->entry_nr,
|
|
|
|
GFP_KERNEL);
|
|
|
|
if (!adev->host_msix_entries) {
|
|
|
|
r = -ENOMEM;
|
|
|
|
goto msix_nr_out;
|
|
|
|
}
|
2010-11-16 22:30:03 +01:00
|
|
|
adev->guest_msix_entries =
|
|
|
|
kzalloc(sizeof(struct msix_entry) * entry_nr->entry_nr,
|
|
|
|
GFP_KERNEL);
|
2009-08-26 13:57:50 +02:00
|
|
|
if (!adev->guest_msix_entries) {
|
|
|
|
kfree(adev->host_msix_entries);
|
|
|
|
r = -ENOMEM;
|
|
|
|
goto msix_nr_out;
|
|
|
|
}
|
|
|
|
} else /* Not allowed set MSI-X number twice */
|
|
|
|
r = -EINVAL;
|
|
|
|
msix_nr_out:
|
|
|
|
mutex_unlock(&kvm->lock);
|
|
|
|
return r;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int kvm_vm_ioctl_set_msix_entry(struct kvm *kvm,
|
|
|
|
struct kvm_assigned_msix_entry *entry)
|
|
|
|
{
|
|
|
|
int r = 0, i;
|
|
|
|
struct kvm_assigned_dev_kernel *adev;
|
|
|
|
|
|
|
|
mutex_lock(&kvm->lock);
|
|
|
|
|
|
|
|
adev = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
|
|
|
|
entry->assigned_dev_id);
|
|
|
|
|
|
|
|
if (!adev) {
|
|
|
|
r = -EINVAL;
|
|
|
|
goto msix_entry_out;
|
|
|
|
}
|
|
|
|
|
|
|
|
for (i = 0; i < adev->entries_nr; i++)
|
|
|
|
if (adev->guest_msix_entries[i].vector == 0 ||
|
|
|
|
adev->guest_msix_entries[i].entry == entry->entry) {
|
|
|
|
adev->guest_msix_entries[i].entry = entry->entry;
|
|
|
|
adev->guest_msix_entries[i].vector = entry->gsi;
|
|
|
|
adev->host_msix_entries[i].entry = entry->entry;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
if (i == adev->entries_nr) {
|
|
|
|
r = -ENOSPC;
|
|
|
|
goto msix_entry_out;
|
|
|
|
}
|
|
|
|
|
|
|
|
msix_entry_out:
|
|
|
|
mutex_unlock(&kvm->lock);
|
|
|
|
|
|
|
|
return r;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
|
|
|
|
unsigned long arg)
|
|
|
|
{
|
|
|
|
void __user *argp = (void __user *)arg;
|
2010-11-16 22:30:06 +01:00
|
|
|
int r;
|
2009-08-26 13:57:50 +02:00
|
|
|
|
|
|
|
switch (ioctl) {
|
|
|
|
case KVM_ASSIGN_PCI_DEVICE: {
|
|
|
|
struct kvm_assigned_pci_dev assigned_dev;
|
|
|
|
|
|
|
|
r = -EFAULT;
|
|
|
|
if (copy_from_user(&assigned_dev, argp, sizeof assigned_dev))
|
|
|
|
goto out;
|
|
|
|
r = kvm_vm_ioctl_assign_device(kvm, &assigned_dev);
|
|
|
|
if (r)
|
|
|
|
goto out;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
case KVM_ASSIGN_IRQ: {
|
|
|
|
r = -EOPNOTSUPP;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
case KVM_ASSIGN_DEV_IRQ: {
|
|
|
|
struct kvm_assigned_irq assigned_irq;
|
|
|
|
|
|
|
|
r = -EFAULT;
|
|
|
|
if (copy_from_user(&assigned_irq, argp, sizeof assigned_irq))
|
|
|
|
goto out;
|
|
|
|
r = kvm_vm_ioctl_assign_irq(kvm, &assigned_irq);
|
|
|
|
if (r)
|
|
|
|
goto out;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
case KVM_DEASSIGN_DEV_IRQ: {
|
|
|
|
struct kvm_assigned_irq assigned_irq;
|
|
|
|
|
|
|
|
r = -EFAULT;
|
|
|
|
if (copy_from_user(&assigned_irq, argp, sizeof assigned_irq))
|
|
|
|
goto out;
|
|
|
|
r = kvm_vm_ioctl_deassign_dev_irq(kvm, &assigned_irq);
|
|
|
|
if (r)
|
|
|
|
goto out;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
case KVM_DEASSIGN_PCI_DEVICE: {
|
|
|
|
struct kvm_assigned_pci_dev assigned_dev;
|
|
|
|
|
|
|
|
r = -EFAULT;
|
|
|
|
if (copy_from_user(&assigned_dev, argp, sizeof assigned_dev))
|
|
|
|
goto out;
|
|
|
|
r = kvm_vm_ioctl_deassign_device(kvm, &assigned_dev);
|
|
|
|
if (r)
|
|
|
|
goto out;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
#ifdef KVM_CAP_IRQ_ROUTING
|
|
|
|
case KVM_SET_GSI_ROUTING: {
|
|
|
|
struct kvm_irq_routing routing;
|
|
|
|
struct kvm_irq_routing __user *urouting;
|
|
|
|
struct kvm_irq_routing_entry *entries;
|
|
|
|
|
|
|
|
r = -EFAULT;
|
|
|
|
if (copy_from_user(&routing, argp, sizeof(routing)))
|
|
|
|
goto out;
|
|
|
|
r = -EINVAL;
|
|
|
|
if (routing.nr >= KVM_MAX_IRQ_ROUTES)
|
|
|
|
goto out;
|
|
|
|
if (routing.flags)
|
|
|
|
goto out;
|
|
|
|
r = -ENOMEM;
|
|
|
|
entries = vmalloc(routing.nr * sizeof(*entries));
|
|
|
|
if (!entries)
|
|
|
|
goto out;
|
|
|
|
r = -EFAULT;
|
|
|
|
urouting = argp;
|
|
|
|
if (copy_from_user(entries, urouting->entries,
|
|
|
|
routing.nr * sizeof(*entries)))
|
|
|
|
goto out_free_irq_routing;
|
|
|
|
r = kvm_set_irq_routing(kvm, entries, routing.nr,
|
|
|
|
routing.flags);
|
|
|
|
out_free_irq_routing:
|
|
|
|
vfree(entries);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
#endif /* KVM_CAP_IRQ_ROUTING */
|
|
|
|
#ifdef __KVM_HAVE_MSIX
|
|
|
|
case KVM_ASSIGN_SET_MSIX_NR: {
|
|
|
|
struct kvm_assigned_msix_nr entry_nr;
|
|
|
|
r = -EFAULT;
|
|
|
|
if (copy_from_user(&entry_nr, argp, sizeof entry_nr))
|
|
|
|
goto out;
|
|
|
|
r = kvm_vm_ioctl_set_msix_nr(kvm, &entry_nr);
|
|
|
|
if (r)
|
|
|
|
goto out;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
case KVM_ASSIGN_SET_MSIX_ENTRY: {
|
|
|
|
struct kvm_assigned_msix_entry entry;
|
|
|
|
r = -EFAULT;
|
|
|
|
if (copy_from_user(&entry, argp, sizeof entry))
|
|
|
|
goto out;
|
|
|
|
r = kvm_vm_ioctl_set_msix_entry(kvm, &entry);
|
|
|
|
if (r)
|
|
|
|
goto out;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
#endif
|
2010-11-16 22:30:06 +01:00
|
|
|
default:
|
|
|
|
r = -ENOTTY;
|
|
|
|
break;
|
2009-08-26 13:57:50 +02:00
|
|
|
}
|
|
|
|
out:
|
|
|
|
return r;
|
|
|
|
}
|
|
|
|
|