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hw/misc/ivshmem: Bury dead legacy INTx code 

Devices "ivshmem-plain" and "ivshmem-doorbell" support only MSI-X.
Config space register Interrupt Pin is zero.  Device "ivshmem"
additionally supported legacy INTx, but it was removed in commit
5a0e75f0a9 "hw/misc/ivshmem: Remove deprecated "ivshmem" legacy
device".  The commit left ivshmem_update_irq() behind.  Since the
Interrupt Pin register is zero, the function does nothing.  Remove it.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20191205203557.11254-1-armbru@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Markus Armbruster 2019-12-05 21:35:57 +01:00 committed by Thomas Huth
parent 1ee5e144ea
commit e858e04dd4
1 changed files with 0 additions and 35 deletions
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35
hw/misc/ivshmem.c
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@ -136,44 +136,11 @@ static inline bool ivshmem_is_master(IVShmemState *s)
return s->master == ON_OFF_AUTO_ON;
}
static void ivshmem_update_irq(IVShmemState *s)
{
PCIDevice *d = PCI_DEVICE(s);
uint32_t isr = s->intrstatus & s->intrmask;
/*
* Do nothing unless the device actually uses INTx. Here's how
* the device variants signal interrupts, what they put in PCI
* config space:
* Device variant Interrupt Interrupt Pin MSI-X cap.
* ivshmem-plain none 0 no
* ivshmem-doorbell MSI-X 1 yes(1)
* ivshmem,msi=off INTx 1 no
* ivshmem,msi=on MSI-X 1(2) yes(1)
* (1) if guest enabled MSI-X
* (2) the device lies
* Leads to the condition for doing nothing:
*/
if (ivshmem_has_feature(s, IVSHMEM_MSI)
|| !d->config[PCI_INTERRUPT_PIN]) {
return;
}
/* don't print ISR resets */
if (isr) {
IVSHMEM_DPRINTF("Set IRQ to %d (%04x %04x)\n",
isr ? 1 : 0, s->intrstatus, s->intrmask);
}
pci_set_irq(d, isr != 0);
}
static void ivshmem_IntrMask_write(IVShmemState *s, uint32_t val)
{
IVSHMEM_DPRINTF("IntrMask write(w) val = 0x%04x\n", val);
s->intrmask = val;
ivshmem_update_irq(s);
}
static uint32_t ivshmem_IntrMask_read(IVShmemState *s)
@ -189,7 +156,6 @@ static void ivshmem_IntrStatus_write(IVShmemState *s, uint32_t val)
IVSHMEM_DPRINTF("IntrStatus write(w) val = 0x%04x\n", val);
s->intrstatus = val;
ivshmem_update_irq(s);
}
static uint32_t ivshmem_IntrStatus_read(IVShmemState *s)
@ -198,7 +164,6 @@ static uint32_t ivshmem_IntrStatus_read(IVShmemState *s)
/* reading ISR clears all interrupts */
s->intrstatus = 0;
ivshmem_update_irq(s);
return ret;
}