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Re: [Qemu-devel] target-i386: clear bsp bit when designating bsp
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-devel] target-i386: clear bsp bit when designating bsp |
Date: |
Tue, 07 Apr 2015 12:54:13 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.5.0 |
On 07/04/2015 12:44, Andreas Färber wrote:
>> > It can change at runtime, though, if you're using the KVM in-kernel LAPIC.
> Got a pointer? A quick git-grep doesn't show anything in hw/ or
> kvm-all.c or target-i386/ assigning cpu_index, so it'll always have the
> initial value.
Not cpu_index, s->apicbase's MSR_IA32_APICBASE_BSP bit can change with
KVM in-kernel LAPIC. It cannot change with QEMU's userspace LAPIC.
Because it can change, you have to call apic_designate_bsp for all CPUs
and not only on CPU 0.
Paolo
- [Qemu-devel] target-i386: clear bsp bit when designating bsp, Nadav Amit, 2015/04/02
- Re: [Qemu-devel] target-i386: clear bsp bit when designating bsp, Paolo Bonzini, 2015/04/02
- Re: [Qemu-devel] target-i386: clear bsp bit when designating bsp, Andreas Färber, 2015/04/07
- Re: [Qemu-devel] target-i386: clear bsp bit when designating bsp, Paolo Bonzini, 2015/04/07
- Re: [Qemu-devel] target-i386: clear bsp bit when designating bsp, Andreas Färber, 2015/04/07
- Re: [Qemu-devel] target-i386: clear bsp bit when designating bsp,
Paolo Bonzini <=
- Re: [Qemu-devel] target-i386: clear bsp bit when designating bsp, Andreas Färber, 2015/04/07
- Re: [Qemu-devel] target-i386: clear bsp bit when designating bsp, Andreas Färber, 2015/04/07
- Re: [Qemu-devel] target-i386: clear bsp bit when designating bsp, Igor Mammedov, 2015/04/07
- Re: [Qemu-devel] target-i386: clear bsp bit when designating bsp, Andreas Färber, 2015/04/07
- Re: [Qemu-devel] target-i386: clear bsp bit when designating bsp, Paolo Bonzini, 2015/04/07
- Re: [Qemu-devel] target-i386: clear bsp bit when designating bsp, Andreas Färber, 2015/04/07
- Re: [Qemu-devel] target-i386: clear bsp bit when designating bsp, Paolo Bonzini, 2015/04/07
- Re: [Qemu-devel] target-i386: clear bsp bit when designating bsp, Paolo Bonzini, 2015/04/07
- Re: [Qemu-devel] target-i386: clear bsp bit when designating bsp, Denis V. Lunev, 2015/04/07
- Re: [Qemu-devel] target-i386: clear bsp bit when designating bsp, Paolo Bonzini, 2015/04/07