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Re: [Xen-devel] Bug: Xen panics with #UD in acpi_processor_idle()
| To: | "Rafal Wojtczuk" <rafal@xxxxxxxxxxxxxxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] Bug: Xen panics with #UD in acpi_processor_idle() |
| From: | "Jan Beulich" <JBeulich@xxxxxxxxxx> |
| Date: | Mon, 22 Nov 2010 14:04:23 +0000 |
| Cc: | |
| Delivery-date: | Mon, 22 Nov 2010 06:04:34 -0800 |
| Envelope-to: | www-data@xxxxxxxxxxxxxxxxxxx |
| In-reply-to: | <20101122130207.GD11110@email> |
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| References: | <20101122130207.GD11110@email> |
| Sender: | xen-devel-bounces@xxxxxxxxxxxxxxxxxxx |
>>> On 22.11.10 at 14:02, Rafal Wojtczuk <rafal@xxxxxxxxxxxxxxxxxxxxxx> wrote: > Somehow offtopic: what is the purpose of cheating about > MSR_IA32_MISC_ENABLE_MONITOR_ENABLE state to dom0 in rdmsr emulation ? > xen-4.0-testing.hg/xen/arch/x86/traps.c:2364 > case MSR_IA32_MISC_ENABLE: > if ( rdmsr_safe(regs->ecx, regs->eax, regs->edx) ) > goto fail; > regs->eax &= ~(MSR_IA32_MISC_ENABLE_PERF_AVAIL | > MSR_IA32_MISC_ENABLE_MONITOR_ENABLE); > regs->eax |= MSR_IA32_MISC_ENABLE_BTS_UNAVAIL | > MSR_IA32_MISC_ENABLE_PEBS_UNAVAIL | > MSR_IA32_MISC_ENABLE_XTPR_DISABLE; > break; This is dealing with bits corresponding to features no domain should use (directly). Jan _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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