From: Gleb Natapov <gleb@redhat.com>
To: Igor Mammedov <imammedo@redhat.com>
Cc: seabios@seabios.org, Eduardo Habkost <ehabkost@redhat.com>,
Anthony Liguori <anthony@codemonkey.ws>,
qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [RFC 0/7+1] QEMU APIC ID + topology bug + CPU hotplug
Date: Thu, 12 Jul 2012 17:00:11 +0300 [thread overview]
Message-ID: <20120712140011.GH7298@redhat.com> (raw)
In-Reply-To: <4FFED674.9090601@redhat.com>
On Thu, Jul 12, 2012 at 03:51:48PM +0200, Igor Mammedov wrote:
> On 07/10/2012 10:22 PM, Eduardo Habkost wrote:
> >The hotplug case is a bit more complex: we need to either:
> > - have a mechanism to let the ACPI SSDT code know what's the APIC ID of
> > hotplugged CPUs; or
> > - make Seabios run some code in the hotplugged CPU (I am assuming that this is
> > simply not possible).
> If SMM is supported by qemu/kvm than it will be possible to trigger SMI from
> APCI method and SMI handler, that are supposed to run on all CPUs (including hot-plugged one)
> , could fixup APIC ID of added CPU in some memory region used by ACPI.
>
SMM is not supported (arguably is should not be supported on real HW
too), but even if it was default SMM address is 0x38000 IIRC and it is a
middle of a memory and can be used by a guest OS.
--
Gleb.
prev parent reply other threads:[~2012-07-12 14:00 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-10 20:22 [Qemu-devel] [RFC 0/7+1] QEMU APIC ID + topology bug + CPU hotplug Eduardo Habkost
2012-07-10 20:22 ` [Qemu-devel] [PATCH 1/7] cpus.h: include cpu-common.h Eduardo Habkost
2012-07-10 20:22 ` [Qemu-devel] [QEMU PATCH 2/7] hw/apic.c: rename bit functions to not conflict with bitops.h Eduardo Habkost
2012-07-12 19:24 ` Blue Swirl
2012-07-13 18:07 ` Eduardo Habkost
2012-07-14 9:09 ` Blue Swirl
2012-07-15 9:19 ` Gleb Natapov
2012-07-10 20:22 ` [Qemu-devel] [QEMU PATCH 3/7] kvm: set vcpu_id to APIC ID instead of CPU index Eduardo Habkost
2012-07-10 20:22 ` [Qemu-devel] [QEMU RFC PATCH 4/7] i386: create apic_id_for_cpu() function Eduardo Habkost
2012-07-10 20:22 ` [Qemu-devel] [QEMU RFC PATCH 5/7] pc: write lapic info (apic IDs) to fw_cfg so seabios can use it Eduardo Habkost
2012-07-12 19:29 ` Blue Swirl
2012-07-13 18:09 ` Eduardo Habkost
2012-07-10 20:22 ` [Qemu-devel] [QEMU RFC PATCH 6/7] i386: topology & APIC ID utility functions Eduardo Habkost
2012-07-12 19:37 ` Blue Swirl
2012-07-13 18:51 ` Eduardo Habkost
2012-07-14 9:14 ` Blue Swirl
2012-07-16 17:42 ` Eduardo Habkost
2012-07-23 16:49 ` Blue Swirl
2012-07-23 18:59 ` Eduardo Habkost
2012-07-23 19:11 ` Blue Swirl
2012-07-23 19:28 ` Eduardo Habkost
2012-07-23 19:44 ` Blue Swirl
2012-07-23 20:14 ` Eduardo Habkost
2012-07-24 19:17 ` Blue Swirl
2012-07-10 20:22 ` [Qemu-devel] [QEMU RFC PATCH 7/7] generate APIC IDs according to CPU topology Eduardo Habkost
2012-07-10 20:22 ` [Qemu-devel] [Seabios RFC PATCH 1/1] get lapic IDs from fw_cfg Eduardo Habkost
2012-07-12 13:51 ` [Qemu-devel] [RFC 0/7+1] QEMU APIC ID + topology bug + CPU hotplug Igor Mammedov
2012-07-12 14:00 ` Gleb Natapov [this message]
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