提交 · 787a660a4f03325a0e00493ac39017e53fd345fa · openeuler / raspberrypi-kernel

10 9月, 2009 4 次提交

KVM: Clean up coalesced_mmio destruction · 787a660a

由 Gregory Haskins 提交于 6月 01, 2009

We invoke kfree() on a data member instead of the structure.  This works today
because the kvm_io_device is the first element of the private structure, but
this could change in the future, so lets clean this up.
Signed-off-by: NGregory Haskins <ghaskins@novell.com>
Acked-by: NChris Wright <chrisw@sous-sol.org>
Signed-off-by: NAvi Kivity <avi@redhat.com>

787a660a

KVM: No disable_irq for MSI/MSI-X interrupt on device assignment · 968a6347

由 Sheng Yang 提交于 4月 30, 2009

Disable interrupt at interrupt handler and enable it when guest ack is for
the level triggered interrupt, to prevent reinjected interrupt. MSI/MSI-X don't
need it.

One possible problem is multiply same vector interrupt injected between irq
handler and scheduled work handler would be merged as one for MSI/MSI-X.
But AFAIK, the drivers handle it well.

The patch fixed the oplin card performance issue(MSI-X performance is half of
MSI/INTx).
Signed-off-by: NSheng Yang <sheng@linux.intel.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>

968a6347

KVM: irqfd · 721eecbf

由 Gregory Haskins 提交于 5月 20, 2009

KVM provides a complete virtual system environment for guests, including
support for injecting interrupts modeled after the real exception/interrupt
facilities present on the native platform (such as the IDT on x86).
Virtual interrupts can come from a variety of sources (emulated devices,
pass-through devices, etc) but all must be injected to the guest via
the KVM infrastructure. This patch adds a new mechanism to inject a specific
interrupt to a guest using a decoupled eventfd mechnanism: Any legal signal
on the irqfd (using eventfd semantics from either userspace or kernel) will
translate into an injected interrupt in the guest at the next available
interrupt window.
Signed-off-by: NGregory Haskins <ghaskins@novell.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>

721eecbf

A
KVM: Move common KVM Kconfig items to new file virt/kvm/Kconfig · 0ba12d10
由 Avi Kivity 提交于 5月 21, 2009
```
Reduce Kconfig code duplication.
Signed-off-by: NAvi Kivity <avi@redhat.com>
```
0ba12d10

09 8月, 2009 1 次提交

KVM: Avoid redelivery of edge interrupt before next edge · b4a2f5e7

由 Gleb Natapov 提交于 7月 05, 2009

The check for an edge is broken in current ioapic code. ioapic->irr is
cleared on each edge interrupt by ioapic_service() and this makes
old_irr != ioapic->irr condition in kvm_ioapic_set_irq() to be always
true. The patch fixes the code to properly recognise edge.

Some HW emulation calls set_irq() without level change. If each such
call is propagated to an OS it may confuse a device driver. This is the
case with keyboard device emulation and Windows XP x64  installer on SMP VM.
Each keystroke produce two interrupts (down/up) one interrupt is
submitted to CPU0 and another to CPU1. This confuses Windows somehow
and it ignores keystrokes.
Signed-off-by: NGleb Natapov <gleb@redhat.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>

b4a2f5e7

05 8月, 2009 1 次提交

KVM: fix ack not being delivered when msi present · 5116d8f6

由 Michael S. Tsirkin 提交于 7月 26, 2009

kvm_notify_acked_irq does not check irq type, so that it sometimes
interprets msi vector as irq.  As a result, ack notifiers are not
called, which typially hangs the guest.  The fix is to track and
check irq type.
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>

5116d8f6

28 6月, 2009 2 次提交

KVM: protect concurrent make_all_cpus_request · 84261923

由 Marcelo Tosatti 提交于 6月 17, 2009

make_all_cpus_request contains a race condition which can
trigger false request completed status, as follows:

CPU0                                              CPU1

if (test_and_set_bit(req,&vcpu->requests))
   ....                                        	   if (test_and_set_bit(req,&vcpu->requests))
   ..                                                  return
proceed to smp_call_function_many(wait=1)

Use a spinlock to serialize concurrent CPUs.

Cc: stable@kernel.org
Signed-off-by: NAndrea Arcangeli <aarcange@redhat.com>
Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>

84261923

KVM: Fix dirty bit tracking for slots with large pages · e244584f

由 Izik Eidus 提交于 6月 10, 2009

When slot is already allocated and being asked to be tracked we need
to break the large pages.

This code flush the mmu when someone ask a slot to start dirty bit
tracking.

Cc: stable@kernel.org
Signed-off-by: NIzik Eidus <ieidus@redhat.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>

e244584f

12 6月, 2009 1 次提交

kvm: remove the duplicated cpumask_clear · aee74f3b

由 Yinghai Lu 提交于 6月 11, 2009

zalloc_cpumask_var already cleared it.
Signed-off-by: NYinghai Lu <yinghai@kernel.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

aee74f3b

10 6月, 2009 25 次提交

KVM: Prevent overflow in largepages calculation · 09f8ca74

由 Avi Kivity 提交于 6月 08, 2009

If userspace specifies a memory slot that is larger than 8 petabytes, it
could overflow the largepages variable.

Cc: stable@kernel.org
Signed-off-by: NAvi Kivity <avi@redhat.com>

09f8ca74

KVM: Disable large pages on misaligned memory slots · ac04527f

由 Avi Kivity 提交于 6月 08, 2009

If a slots guest physical address and host virtual address unequal (mod
large page size), then we would erronously try to back guest large pages
with host large pages.  Detect this misalignment and diable large page
support for the trouble slot.

Cc: stable@kernel.org
Signed-off-by: NAvi Kivity <avi@redhat.com>

ac04527f

KVM: take mmu_lock when updating a deleted slot · b43b1901

由 Marcelo Tosatti 提交于 5月 12, 2009

kvm_handle_hva relies on mmu_lock protection to safely access
the memslot structures.
Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>

b43b1901

KVM: protect assigned dev workqueue, int handler and irq acker · 547de29e

由 Marcelo Tosatti 提交于 5月 07, 2009

kvm_assigned_dev_ack_irq is vulnerable to a race condition with the
interrupt handler function. It does:

        if (dev->host_irq_disabled) {
                enable_irq(dev->host_irq);
                dev->host_irq_disabled = false;
        }

If an interrupt triggers before the host->dev_irq_disabled assignment,
it will disable the interrupt and set dev->host_irq_disabled to true.

On return to kvm_assigned_dev_ack_irq, dev->host_irq_disabled is set to
false, and the next kvm_assigned_dev_ack_irq call will fail to reenable
it.

Other than that, having the interrupt handler and work handlers run in
parallel sounds like asking for trouble (could not spot any obvious
problem, but better not have to, its fragile).

CC: sheng.yang@intel.com
Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>

547de29e

KVM: Trivial format fix in setup_routing_entry() · efbc100c

由 Chris Wright 提交于 5月 01, 2009

Remove extra tab.
Signed-off-by: NChris Wright <chrisw@redhat.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>

efbc100c

KVM: VMX: Disable VMX when system shutdown · 8e1c1815

由 Sheng Yang 提交于 4月 29, 2009

Intel TXT(Trusted Execution Technology) required VMX off for all cpu to work
when system shutdown.

CC: Joseph Cihula <joseph.cihula@intel.com>
Signed-off-by: NSheng Yang <sheng@linux.intel.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>

8e1c1815

KVM: Enable snooping control for supported hardware · 522c68c4

由 Sheng Yang 提交于 4月 27, 2009

Memory aliases with different memory type is a problem for guest. For the guest
without assigned device, the memory type of guest memory would always been the
same as host(WB); but for the assigned device, some part of memory may be used
as DMA and then set to uncacheable memory type(UC/WC), which would be a conflict of
host memory type then be a potential issue.

Snooping control can guarantee the cache correctness of memory go through the
DMA engine of VT-d.

[avi: fix build on ia64]
Signed-off-by: NSheng Yang <sheng@linux.intel.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>

522c68c4

KVM: Fix interrupt unhalting a vcpu when it shouldn't · 78646121

由 Gleb Natapov 提交于 3月 23, 2009

kvm_vcpu_block() unhalts vpu on an interrupt/timer without checking
if interrupt window is actually opened.
Signed-off-by: NGleb Natapov <gleb@redhat.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>

78646121

KVM: Timer event should not unconditionally unhalt vcpu. · 09cec754

由 Gleb Natapov 提交于 3月 23, 2009

Currently timer events are processed before entering guest mode. Move it
to main vcpu event loop since timer events should be processed even while
vcpu is halted.  Timer may cause interrupt/nmi to be injected and only then
vcpu will be unhalted.
Signed-off-by: NGleb Natapov <gleb@redhat.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>

09cec754

KVM: MMU: do not free active mmu pages in free_mmu_pages() · f00be0ca

由 Gleb Natapov 提交于 3月 19, 2009

free_mmu_pages() should only undo what alloc_mmu_pages() does.
Free mmu pages from the generic VM destruction function, kvm_destroy_vm().
Signed-off-by: NGleb Natapov <gleb@redhat.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>

f00be0ca

KVM: Device assignment framework rework · e56d532f

由 Sheng Yang 提交于 3月 12, 2009

After discussion with Marcelo, we decided to rework device assignment framework
together. The old problems are kernel logic is unnecessary complex. So Marcelo
suggest to split it into a more elegant way:

1. Split host IRQ assign and guest IRQ assign. And userspace determine the
combination. Also discard msi2intx parameter, userspace can specific
KVM_DEV_IRQ_HOST_MSI | KVM_DEV_IRQ_GUEST_INTX in assigned_irq->flags to
enable MSI to INTx convertion.

2. Split assign IRQ and deassign IRQ. Import two new ioctls:
KVM_ASSIGN_DEV_IRQ and KVM_DEASSIGN_DEV_IRQ.

This patch also fixed the reversed _IOR vs _IOW in definition(by deprecated the
old interface).

[avi: replace homemade bitcount() by hweight_long()]
Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: NSheng Yang <sheng@linux.intel.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>

e56d532f

KVM: APIC: get rid of deliver_bitmask · 58c2dde1