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hpet: enable to entitle more irq pins for hpet

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Owning to some different hardware design, piix and q35 need
different compat. So making them diverge.

On q35, IRQ2/8 can be reserved for hpet timer 0/1. And pin 16~23
can be assigned to hpet as guest chooses. So we introduce intcap
property to do that.

Consider the compat and piix/q35, we finally have the following
value for intcap: For piix, hpet's intcap is hard coded as IRQ2.
For pc-q35-1.7 and earlier, we use IRQ2 for compat reason. Otherwise
IRQ2, IRQ8, and IRQ16~23 are allowed.

Signed-off-by: Liu Ping Fan <pingfank@linux.vnet.ibm.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Liu Ping Fan 2013-12-08 17:38:17 +08:00 committed by Michael S. Tsirkin
parent 0d63b2dd31
commit 7a10ef51c2
5 changed files with 56 additions and 11 deletions
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19
hw/i386/pc.c
View file

@ -1253,7 +1253,8 @@ static const MemoryRegionOps ioportF0_io_ops = {
void pc_basic_device_init(ISABus *isa_bus, qemu_irq *gsi,
ISADevice **rtc_state,
ISADevice **floppy,
bool no_vmport)
bool no_vmport,
uint32 hpet_irqs)
{
int i;
DriveInfo *fd[MAX_FD];
@ -1280,9 +1281,21 @@ void pc_basic_device_init(ISABus *isa_bus, qemu_irq *gsi,
* when the HPET wants to take over. Thus we have to disable the latter.
*/
if (!no_hpet && (!kvm_irqchip_in_kernel() || kvm_has_pit_state2())) {
hpet = sysbus_try_create_simple("hpet", HPET_BASE, NULL);
/* In order to set property, here not using sysbus_try_create_simple */
hpet = qdev_try_create(NULL, "hpet");
if (hpet) {
/* For pc-piix-*, hpet's intcap is always IRQ2. For pc-q35-1.7
* and earlier, use IRQ2 for compat. Otherwise, use IRQ16~23,
* IRQ8 and IRQ2.
*/
uint8_t compat = object_property_get_int(OBJECT(hpet),
HPET_INTCAP, NULL);
if (!compat) {
qdev_prop_set_uint32(hpet, HPET_INTCAP, hpet_irqs);
}
qdev_init_nofail(hpet);
sysbus_mmio_map(SYS_BUS_DEVICE(hpet), 0, HPET_BASE);
for (i = 0; i < GSI_NUM_PINS; i++) {
sysbus_connect_irq(SYS_BUS_DEVICE(hpet), i, gsi[i]);
}

3
hw/i386/pc_piix.c
View file

@ -189,7 +189,8 @@ static void pc_init1(QEMUMachineInitArgs *args,
pc_vga_init(isa_bus, pci_enabled ? pci_bus : NULL);
/* init basic PC hardware */
pc_basic_device_init(isa_bus, gsi, &rtc_state, &floppy, xen_enabled());
pc_basic_device_init(isa_bus, gsi, &rtc_state, &floppy, xen_enabled(),
0x4);
pc_nic_init(isa_bus, pci_bus);

12
hw/i386/pc_q35.c
View file

@ -190,7 +190,7 @@ static void pc_q35_init(QEMUMachineInitArgs *args)
pc_register_ferr_irq(gsi[13]);
/* init basic PC hardware */
pc_basic_device_init(isa_bus, gsi, &rtc_state, &floppy, false);
pc_basic_device_init(isa_bus, gsi, &rtc_state, &floppy, false, 0xff0104);
/* connect pm stuff to lpc */
ich9_lpc_pm_init(lpc);
@ -295,7 +295,11 @@ static QEMUMachine pc_q35_machine_v2_0 = {
static QEMUMachine pc_q35_machine_v1_7 = {
PC_Q35_1_7_MACHINE_OPTIONS,
.name = "pc-q35-1.7",
.init = pc_q35_init,
.init = pc_q35_init_1_7,
.compat_props = (GlobalProperty[]) {
PC_Q35_COMPAT_1_7,
{ /* end of list */ }
},
};
#define PC_Q35_1_6_MACHINE_OPTIONS PC_Q35_MACHINE_OPTIONS
@ -305,7 +309,7 @@ static QEMUMachine pc_q35_machine_v1_6 = {
.name = "pc-q35-1.6",
.init = pc_q35_init_1_6,
.compat_props = (GlobalProperty[]) {
PC_COMPAT_1_6,
PC_Q35_COMPAT_1_6,
{ /* end of list */ }
},
};
@ -315,7 +319,7 @@ static QEMUMachine pc_q35_machine_v1_5 = {
.name = "pc-q35-1.5",
.init = pc_q35_init_1_5,
.compat_props = (GlobalProperty[]) {
PC_COMPAT_1_5,
PC_Q35_COMPAT_1_5,
{ /* end of list */ }
},
};

9
hw/timer/hpet.c
View file

@ -73,6 +73,7 @@ typedef struct HPETState {
uint8_t rtc_irq_level;
qemu_irq pit_enabled;
uint8_t num_timers;
uint32_t intcap;
HPETTimer timer[HPET_MAX_TIMERS];
/* Memory-mapped, software visible registers */
@ -663,8 +664,8 @@ static void hpet_reset(DeviceState *d)
if (s->flags & (1 << HPET_MSI_SUPPORT)) {
timer->config |= HPET_TN_FSB_CAP;
}
/* advertise availability of ioapic inti2 */
timer->config |= 0x00000004ULL << 32;
/* advertise availability of ioapic int */
timer->config |= (uint64_t)s->intcap << 32;
timer->period = 0ULL;
timer->wrap_flag = 0;
}
@ -713,6 +714,9 @@ static void hpet_realize(DeviceState *dev, Error **errp)
int i;
HPETTimer *timer;
if (!s->intcap) {
error_printf("Hpet's intcap not initialized.\n");
}
if (hpet_cfg.count == UINT8_MAX) {
/* first instance */
hpet_cfg.count = 0;
@ -753,6 +757,7 @@ static void hpet_realize(DeviceState *dev, Error **errp)
static Property hpet_device_properties[] = {
DEFINE_PROP_UINT8("timers", HPETState, num_timers, HPET_MIN_TIMERS),
DEFINE_PROP_BIT("msi", HPETState, flags, HPET_MSI_SUPPORT, false),
DEFINE_PROP_UINT32(HPET_INTCAP, HPETState, intcap, 0),
DEFINE_PROP_END_OF_LIST(),
};

24
include/hw/i386/pc.h
View file

@ -13,6 +13,8 @@
#include "sysemu/sysemu.h"
#include "hw/pci/pci.h"
#define HPET_INTCAP "hpet-intcap"
/* PC-style peripherals (also used by other machines). */
typedef struct PcPciInfo {
@ -146,7 +148,8 @@ DeviceState *pc_vga_init(ISABus *isa_bus, PCIBus *pci_bus);
void pc_basic_device_init(ISABus *isa_bus, qemu_irq *gsi,
ISADevice **rtc_state,
ISADevice **floppy,
bool no_vmport);
bool no_vmport,
uint32 hpet_irqs);
void pc_init_ne2k_isa(ISABus *bus, NICInfo *nd);
void pc_cmos_init(ram_addr_t ram_size, ram_addr_t above_4g_mem_size,
const char *boot_device,
@ -236,6 +239,25 @@ uint16_t pvpanic_port(void);
int e820_add_entry(uint64_t, uint64_t, uint32_t);
#define PC_Q35_COMPAT_1_7 \
{\
.driver = "hpet",\
.property = HPET_INTCAP,\
.value = stringify(4),\
}
#define PC_Q35_COMPAT_1_6 \
PC_COMPAT_1_6, \
PC_Q35_COMPAT_1_7
#define PC_Q35_COMPAT_1_5 \
PC_COMPAT_1_5, \
PC_Q35_COMPAT_1_6
#define PC_Q35_COMPAT_1_4 \
PC_COMPAT_1_4, \
PC_Q35_COMPAT_1_5
#define PC_COMPAT_1_6 \
{\
.driver = "e1000",\