Commit 298e01b6beb519c2adbd57cf4d60fe1e3d78d87f
1 parent
a07c67df
Tell BIOS about the number of CPUs
Previously, the BIOS would probe the CPUs for SMP guests. This tends to be very unreliably because of startup timing issues. By passing the number of CPUs in the CMOS, the BIOS can detect the number of CPUs much more reliably. (Anthony Liguori) git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4114 c046a42c-6fe2-441c-8c8c-71466251a162
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hw/pc.c
| @@ -213,6 +213,9 @@ static void cmos_init(int ram_size, const char *boot_device, BlockDriverState ** | @@ -213,6 +213,9 @@ static void cmos_init(int ram_size, const char *boot_device, BlockDriverState ** | ||
| 213 | rtc_set_memory(s, 0x34, val); | 213 | rtc_set_memory(s, 0x34, val); |
| 214 | rtc_set_memory(s, 0x35, val >> 8); | 214 | rtc_set_memory(s, 0x35, val >> 8); |
| 215 | 215 | ||
| 216 | + /* set the number of CPU */ | ||
| 217 | + rtc_set_memory(s, 0x5f, smp_cpus - 1); | ||
| 218 | + | ||
| 216 | /* set boot devices, and disable floppy signature check if requested */ | 219 | /* set boot devices, and disable floppy signature check if requested */ |
| 217 | #define PC_MAX_BOOT_DEVICES 3 | 220 | #define PC_MAX_BOOT_DEVICES 3 |
| 218 | nbds = strlen(boot_device); | 221 | nbds = strlen(boot_device); |