Messages in this thread Patch in this message | | | Subject | [PATCH] lguest: fix TSC "divide error: 0000 [#1]" boot crash | From | Rusty Russell <> | Date | Fri, 29 Jun 2007 11:30:33 +1000 |
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Configuring a guest with < CONFIG_M586TSC reveals an lguest bug: the TSC code expects to see the TSC capability bit, but we weren't setting up the capabilities until much later in check_bugs -> identify_boot_cpu -> identify_boot_cpu.
Do the same thing as Xen and the head.S native code: populate the first capability word before start_kernel().
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
diff -r 7743cd1639b7 drivers/lguest/lguest.c --- a/drivers/lguest/lguest.c Thu Jun 28 23:21:41 2007 +1000 +++ b/drivers/lguest/lguest.c Fri Jun 29 06:23:59 2007 +1000 @@ -598,6 +598,9 @@ __init void lguest_init(void *boot) paravirt_disable_iospace(); cpu_detect(&new_cpu_data); + /* head.S usually sets up the first capability word, so do it here. */ + new_cpu_data.x86_capability[0] = cpuid_edx(1); + /* Math is always hard! */ new_cpu_data.hard_math = 1;
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