From 298e01b6beb519c2adbd57cf4d60fe1e3d78d87f Mon Sep 17 00:00:00 2001 From: aurel32 Date: Fri, 28 Mar 2008 22:28:08 +0000 Subject: [PATCH] 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 --- hw/pc.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/hw/pc.c b/hw/pc.c index 2a569c7..4fec2d4 100644 --- a/hw/pc.c +++ b/hw/pc.c @@ -213,6 +213,9 @@ static void cmos_init(int ram_size, const char *boot_device, BlockDriverState ** rtc_set_memory(s, 0x34, val); rtc_set_memory(s, 0x35, val >> 8); + /* set the number of CPU */ + rtc_set_memory(s, 0x5f, smp_cpus - 1); + /* set boot devices, and disable floppy signature check if requested */ #define PC_MAX_BOOT_DEVICES 3 nbds = strlen(boot_device); -- 2.7.4