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ppc/pnv: Add models for POWER8 PHB3 PCIe Host bridge

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This is a model of the PCIe Host Bridge (PHB3) found on a POWER8
processor. It includes the PowerBus logic interface (PBCQ), IOMMU
support, a single PCIe Gen.3 Root Complex, and support for MSI and LSI
interrupt sources as found on a POWER8 system using the XICS interrupt
controller.

The POWER8 processor comes in different flavors: Venice, Murano,
Naple, each having a different number of PHBs. To make things simpler,
the models provides 3 PHB3 per chip. Some platforms, like the
Firestone, can also couple PHBs on the first chip to provide more
bandwidth but this is too specific to model in QEMU.

XICS requires some adjustment to support the PHB3 MSI. The changes are
provided here but they could be decoupled in prereq patches.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20200127144506.11132-3-clg@kaod.org>
[dwg: Use device_class_set_props()]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Cédric Le Goater 2020-01-27 15:45:06 +01:00 • committed by David Gibson
parent 4f9924c4d4
commit 9ae1329ee2
11 changed files with 2614 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

14
hw/intc/xics.c
View file

@ -217,7 +217,7 @@ void icp_eoi(ICPState *icp, uint32_t xirr)
}
}
static void icp_irq(ICSState *ics, int server, int nr, uint8_t priority)
void icp_irq(ICSState *ics, int server, int nr, uint8_t priority)
{
ICPState *icp = xics_icp_get(ics->xics, server);
@ -512,8 +512,14 @@ void ics_write_xive(ICSState *ics, int srcno, int server,
static void ics_reject(ICSState *ics, uint32_t nr)
{
ICSStateClass *isc = ICS_GET_CLASS(ics);
ICSIRQState *irq = ics->irqs + nr - ics->offset;
if (isc->reject) {
isc->reject(ics, nr);
return;
}
trace_xics_ics_reject(nr, nr - ics->offset);
if (irq->flags & XICS_FLAGS_IRQ_MSI) {
irq->status |= XICS_STATUS_REJECTED;
@ -524,8 +530,14 @@ static void ics_reject(ICSState *ics, uint32_t nr)
void ics_resend(ICSState *ics)
{
ICSStateClass *isc = ICS_GET_CLASS(ics);
int i;
if (isc->resend) {
isc->resend(ics);
return;
}
for (i = 0; i < ics->nr_irqs; i++) {
/* FIXME: filter by server#? */
if (ics->irqs[i].flags & XICS_FLAGS_IRQ_LSI) {