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Make PCI interupts allocation static when using bootrom (UEFI).

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This makes factual interrupt routing match one shipped with UEFI firmware.
With old firmware this make legacy interrupts work reliable for functions 0
of PCI slots 3-6.  Updated UEFI image fixes problem completely.
This commit is contained in:
Alexander Motin 2016-07-14 17:16:10 +00:00
parent a509d56d7f
commit 1b4496d043
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=302850
5 changed files with 28 additions and 13 deletions
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9
usr.sbin/bhyve/ioapic.c
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@ -29,11 +29,14 @@
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <stdio.h>
#include <machine/vmm.h>
#include <vmmapi.h>
#include "ioapic.h"
#include "pci_emul.h"
#include "pci_lpc.h"
/*
* Assign PCI INTx interrupts to I/O APIC pins in a round-robin
@ -64,11 +67,15 @@ ioapic_init(struct vmctx *ctx)
}
int
ioapic_pci_alloc_irq(void)
ioapic_pci_alloc_irq(struct pci_devinst *pi)
{
static int last_pin;
if (pci_pins == 0)
return (-1);
if (lpc_bootrom()) {
/* For external bootrom use fixed mapping. */
return (16 + (4 + pi->pi_slot + pi->pi_lintr.pin) % 8);
}
return (16 + (last_pin++ % pci_pins));
}

4
usr.sbin/bhyve/ioapic.h
View File

@ -30,10 +30,12 @@
#ifndef _IOAPIC_H_
#define _IOAPIC_H_
struct pci_devinst;
/*
* Allocate a PCI IRQ from the I/O APIC.
*/
void ioapic_init(struct vmctx *ctx);
int ioapic_pci_alloc_irq(void);
int ioapic_pci_alloc_irq(struct pci_devinst *pi);
#endif

4
usr.sbin/bhyve/pci_emul.c
View File

@ -1504,7 +1504,7 @@ pci_lintr_route(struct pci_devinst *pi)
* is not yet assigned.
*/
if (ii->ii_ioapic_irq == 0)
ii->ii_ioapic_irq = ioapic_pci_alloc_irq();
ii->ii_ioapic_irq = ioapic_pci_alloc_irq(pi);
assert(ii->ii_ioapic_irq > 0);
/*
@ -1512,7 +1512,7 @@ pci_lintr_route(struct pci_devinst *pi)
* not yet assigned.
*/
if (ii->ii_pirq_pin == 0)
ii->ii_pirq_pin = pirq_alloc_pin(pi->pi_vmctx);
ii->ii_pirq_pin = pirq_alloc_pin(pi);
assert(ii->ii_pirq_pin > 0);
pi->pi_lintr.ioapic_irq = ii->ii_ioapic_irq;

22
usr.sbin/bhyve/pci_irq.c
View File

@ -193,19 +193,25 @@ pci_irq_deassert(struct pci_devinst *pi)
}
int
pirq_alloc_pin(struct vmctx *ctx)
pirq_alloc_pin(struct pci_devinst *pi)
{
struct vmctx *ctx = pi->pi_vmctx;
int best_count, best_irq, best_pin, irq, pin;
pirq_cold = 0;
/* First, find the least-used PIRQ pin. */
best_pin = 0;
best_count = pirqs[0].use_count;
for (pin = 1; pin < nitems(pirqs); pin++) {
if (pirqs[pin].use_count < best_count) {
best_pin = pin;
best_count = pirqs[pin].use_count;
if (lpc_bootrom()) {
/* For external bootrom use fixed mapping. */
best_pin = (4 + pi->pi_slot + pi->pi_lintr.pin) % 8;
} else {
/* Find the least-used PIRQ pin. */
best_pin = 0;
best_count = pirqs[0].use_count;
for (pin = 1; pin < nitems(pirqs); pin++) {
if (pirqs[pin].use_count < best_count) {
best_pin = pin;
best_count = pirqs[pin].use_count;
}
}
}
pirqs[best_pin].use_count++;

2
usr.sbin/bhyve/pci_irq.h
View File

@ -37,7 +37,7 @@ void pci_irq_deassert(struct pci_devinst *pi);
void pci_irq_init(struct vmctx *ctx);
void pci_irq_reserve(int irq);
void pci_irq_use(int irq);
int pirq_alloc_pin(struct vmctx *ctx);
int pirq_alloc_pin(struct pci_devinst *pi);
int pirq_irq(int pin);
uint8_t pirq_read(int pin);
void pirq_write(struct vmctx *ctx, int pin, uint8_t val);