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pc: Update rtc_cmos on CPU hot-plug 

It provides updated currently available CPUs count to BIOS on reboot.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
This commit is contained in:
Igor Mammedov 2013-04-23 10:29:40 +02:00 committed by Andreas Färber
parent 066e9b2710
commit b8b7456d6a
3 changed files with 28 additions and 0 deletions
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20
hw/i386/pc.c
View File

@ -338,6 +338,21 @@ static void pc_cmos_init_late(void *opaque)
qemu_unregister_reset(pc_cmos_init_late, opaque);
}
typedef struct RTCCPUHotplugArg {
Notifier cpu_added_notifier;
ISADevice *rtc_state;
} RTCCPUHotplugArg;
static void rtc_notify_cpu_added(Notifier *notifier, void *data)
{
RTCCPUHotplugArg *arg = container_of(notifier, RTCCPUHotplugArg,
cpu_added_notifier);
ISADevice *s = arg->rtc_state;
/* increment the number of CPUs */
rtc_set_memory(s, 0x5f, rtc_get_memory(s, 0x5f) + 1);
}
void pc_cmos_init(ram_addr_t ram_size, ram_addr_t above_4g_mem_size,
const char *boot_device,
ISADevice *floppy, BusState *idebus0, BusState *idebus1,
@ -346,6 +361,7 @@ void pc_cmos_init(ram_addr_t ram_size, ram_addr_t above_4g_mem_size,
int val, nb, i;
FDriveType fd_type[2] = { FDRIVE_DRV_NONE, FDRIVE_DRV_NONE };
static pc_cmos_init_late_arg arg;
static RTCCPUHotplugArg cpu_hotplug_cb;
/* various important CMOS locations needed by PC/Bochs bios */
@ -384,6 +400,10 @@ void pc_cmos_init(ram_addr_t ram_size, ram_addr_t above_4g_mem_size,
/* set the number of CPU */
rtc_set_memory(s, 0x5f, smp_cpus - 1);
/* init CPU hotplug notifier */
cpu_hotplug_cb.rtc_state = s;
cpu_hotplug_cb.cpu_added_notifier.notify = rtc_notify_cpu_added;
qemu_register_cpu_added_notifier(&cpu_hotplug_cb.cpu_added_notifier);
/* set boot devices, and disable floppy signature check if requested */
if (set_boot_dev(s, boot_device, fd_bootchk)) {

7
hw/timer/mc146818rtc.c
View File

@ -680,6 +680,13 @@ void rtc_set_memory(ISADevice *dev, int addr, int val)
s->cmos_data[addr] = val;
}
int rtc_get_memory(ISADevice *dev, int addr)
{
RTCState *s = MC146818_RTC(dev);
assert(addr >= 0 && addr <= 127);
return s->cmos_data[addr];
}
static void rtc_set_date_from_host(ISADevice *dev)
{
RTCState *s = MC146818_RTC(dev);

1
include/hw/timer/mc146818rtc.h
View File

@ -8,6 +8,7 @@
ISADevice *rtc_init(ISABus *bus, int base_year, qemu_irq intercept_irq);
void rtc_set_memory(ISADevice *dev, int addr, int val);
int rtc_get_memory(ISADevice *dev, int addr);
void rtc_set_date(ISADevice *dev, const struct tm *tm);
#endif /* !MC146818RTC_H */