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ehci: fix Interrupt Threshold Control implementation 

First, not all interrupts are subject to Interrupt Threshold Control,
some of them must be delivered without delay.

Second, Interrupt Threshold Control state must be part of vmstate,
otherwise we might loose IRQs on migration.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2012-08-15 13:55:40 +02:00
parent 0daf53047d
commit 6d3b6d3d2d
1 changed files with 10 additions and 2 deletions
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10
hw/usb/hcd-ehci.c
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@ -575,8 +575,13 @@ static inline void ehci_update_irq(EHCIState *s)
/* flag interrupt condition */
static inline void ehci_raise_irq(EHCIState *s, int intr)
{
if (intr & (USBSTS_PCD | USBSTS_FLR | USBSTS_HSE)) {
s->usbsts |= intr;
ehci_update_irq(s);
} else {
s->usbsts_pending |= intr;
}
}
/*
* Commit pending interrupts (added via ehci_raise_irq),
@ -2466,13 +2471,16 @@ static int usb_ehci_post_load(void *opaque, int version_id)
static const VMStateDescription vmstate_ehci = {
.name = "ehci",
.version_id = 1,
.version_id = 2,
.minimum_version_id = 1,
.post_load = usb_ehci_post_load,
.fields = (VMStateField[]) {
VMSTATE_PCI_DEVICE(dev, EHCIState),
/* mmio registers */
VMSTATE_UINT32(usbcmd, EHCIState),
VMSTATE_UINT32(usbsts, EHCIState),
VMSTATE_UINT32_V(usbsts_pending, EHCIState, 2),
VMSTATE_UINT32_V(usbsts_frindex, EHCIState, 2),
VMSTATE_UINT32(usbintr, EHCIState),
VMSTATE_UINT32(frindex, EHCIState),
VMSTATE_UINT32(ctrldssegment, EHCIState),