From: Paolo Bonzini <pbonzini@redhat.com>
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: "Gabriel L. Somlo" <gsomlo@gmail.com>,
Alex Williamson <alex.williamson@redhat.com>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"eddie.dong@intel.com" <eddie.dong@intel.com>,
Alexander Graf <agraf@suse.de>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>
Subject: Re: [PATCH RFC] kvm: ignore apic polarity
Date: Fri, 28 Feb 2014 09:11:08 +0100 [thread overview]
Message-ID: <5310449C.7040407@redhat.com> (raw)
In-Reply-To: <20140228045524.GB29585@redhat.com>
Il 28/02/2014 05:55, Michael S. Tsirkin ha scritto:
> Why?
>
> We already have different ACPI tables for TCG vs KVM.
> Specifically apic interrupt override flag in MADT is set
> for KVM but not TCG.
It used to be this way, but
bool kvm_allows_irq0_override(void)
{
return !kvm_irqchip_in_kernel() || kvm_has_gsi_routing();
}
means that these days it is usually set for both TCG and KVM.
> As KVM hardware differs from TCG, I expect them to move
> further apart with time.
I don't expect this, because there are some kind of guests that people
will unknowingly end up running with TCG---for example libguestfs. So
minimizing the differences in hardware between KVM and TCG _is_ a goal.
> Or we can do a patch like we did for kvm and ignore polarity,
> treating levels as logical rather than physical.
Yes.
Paolo
WARNING: multiple messages have this Message-ID (diff)
From: Paolo Bonzini <pbonzini@redhat.com>
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Alex Williamson <alex.williamson@redhat.com>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"eddie.dong@intel.com" <eddie.dong@intel.com>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
Alexander Graf <agraf@suse.de>,
"Gabriel L. Somlo" <gsomlo@gmail.com>
Subject: Re: [Qemu-devel] [PATCH RFC] kvm: ignore apic polarity
Date: Fri, 28 Feb 2014 09:11:08 +0100 [thread overview]
Message-ID: <5310449C.7040407@redhat.com> (raw)
In-Reply-To: <20140228045524.GB29585@redhat.com>
Il 28/02/2014 05:55, Michael S. Tsirkin ha scritto:
> Why?
>
> We already have different ACPI tables for TCG vs KVM.
> Specifically apic interrupt override flag in MADT is set
> for KVM but not TCG.
It used to be this way, but
bool kvm_allows_irq0_override(void)
{
return !kvm_irqchip_in_kernel() || kvm_has_gsi_routing();
}
means that these days it is usually set for both TCG and KVM.
> As KVM hardware differs from TCG, I expect them to move
> further apart with time.
I don't expect this, because there are some kind of guests that people
will unknowingly end up running with TCG---for example libguestfs. So
minimizing the differences in hardware between KVM and TCG _is_ a goal.
> Or we can do a patch like we did for kvm and ignore polarity,
> treating levels as logical rather than physical.
Yes.
Paolo
next prev parent reply other threads:[~2014-02-28 8:11 UTC|newest]
Thread overview: 155+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-08 20:02 [Qemu-devel] [PATCH] Add option to disable FDC from ISA bus and ACPI on i386 Gabriel L. Somlo
2014-01-08 20:38 ` Michael S. Tsirkin
2014-01-08 21:09 ` Gabriel L. Somlo
2014-01-15 11:13 ` Paolo Bonzini
2014-01-08 22:13 ` Paolo Bonzini
2014-01-08 23:39 ` Gabriel L. Somlo
2014-01-09 0:12 ` Alexander Graf
2014-01-09 1:51 ` Michael S. Tsirkin
2014-01-09 18:51 ` Gabriel L. Somlo
2014-01-09 20:12 ` Paolo Bonzini
2014-01-09 21:33 ` Michael S. Tsirkin
2014-01-09 21:58 ` Gabriel L. Somlo
2014-01-09 21:44 ` Gabriel L. Somlo
2014-01-10 12:37 ` Paolo Bonzini
2014-01-10 15:35 ` Gabriel L. Somlo
2014-01-10 16:13 ` Igor Mammedov
2014-01-17 21:10 ` [Qemu-devel] RFC: ACPI, HPET._CRS, MacOSX vs. WinXP Gabriel L. Somlo
2014-01-20 11:58 ` Michael S. Tsirkin
2014-01-20 11:57 ` Paolo Bonzini
2014-01-20 12:08 ` Michael S. Tsirkin
2014-01-20 12:16 ` Paolo Bonzini
2014-01-20 18:54 ` Gabriel L. Somlo
2014-01-20 20:31 ` Michael S. Tsirkin
2014-01-20 21:25 ` Gabriel L. Somlo
2014-01-21 10:33 ` Paolo Bonzini
2014-01-21 11:02 ` Michael S. Tsirkin
2014-01-21 11:05 ` Paolo Bonzini
2014-01-21 11:44 ` Michael S. Tsirkin
2014-01-21 18:11 ` [Qemu-devel] [PATCH] ACPI: Add IRQ resource to HPET._CRS on Mac OS X Gabriel L. Somlo
2014-01-21 18:38 ` Michael S. Tsirkin
2014-01-24 16:46 ` Gabriel L. Somlo
2014-01-24 21:18 ` Alexander Graf
2014-01-25 0:09 ` Gabriel L. Somlo
2014-01-25 9:08 ` Alexander Graf
2014-01-27 22:51 ` Gabriel L. Somlo
2014-01-27 23:51 ` Alexander Graf
2014-01-28 16:45 ` [Qemu-devel] OSX guest support review Gabriel L. Somlo
2014-01-28 16:57 ` Michael S. Tsirkin
2014-01-29 14:17 ` Alexander Graf
2014-01-29 21:36 ` [Qemu-devel] OSX guest vs. kvm ioapic polarity Gabriel L. Somlo
2014-01-29 22:18 ` Michael S. Tsirkin
2014-01-30 14:18 ` Gabriel L. Somlo
2014-01-30 19:48 ` Michael S. Tsirkin
2014-01-30 20:21 ` Gabriel L. Somlo
2014-01-30 20:28 ` Michael S. Tsirkin
2014-01-30 20:33 ` Michael S. Tsirkin
2014-01-30 20:44 ` Gabriel L. Somlo
2014-02-11 18:23 ` RFC: ioapic polarity vs. qemu os-x guest Gabriel L. Somlo
2014-02-11 18:23 ` [Qemu-devel] " Gabriel L. Somlo
2014-02-11 19:54 ` Michael S. Tsirkin
2014-02-11 19:54 ` [Qemu-devel] " Michael S. Tsirkin
2014-02-11 21:35 ` Gabriel L. Somlo
2014-02-11 21:35 ` [Qemu-devel] " Gabriel L. Somlo
2014-02-14 21:13 ` Gabriel L. Somlo
2014-02-14 21:13 ` [Qemu-devel] " Gabriel L. Somlo
2014-02-14 21:21 ` Alexander Graf
2014-02-14 21:21 ` [Qemu-devel] " Alexander Graf
2014-02-14 22:06 ` Gabriel L. Somlo
2014-02-14 22:06 ` [Qemu-devel] " Gabriel L. Somlo
2014-02-14 22:13 ` Alexander Graf
2014-02-14 22:13 ` [Qemu-devel] " Alexander Graf
2014-02-16 11:18 ` Michael S. Tsirkin
2014-02-16 11:18 ` [Qemu-devel] " Michael S. Tsirkin
2014-02-16 11:41 ` Michael S. Tsirkin
2014-02-16 11:41 ` [Qemu-devel] " Michael S. Tsirkin
2014-02-16 14:47 ` Alex Williamson
2014-02-16 14:47 ` [Qemu-devel] " Alex Williamson
2014-02-16 16:23 ` Michael S. Tsirkin
2014-02-16 16:23 ` [Qemu-devel] " Michael S. Tsirkin
2014-02-17 17:57 ` Gabriel L. Somlo
2014-02-17 17:57 ` [Qemu-devel] " Gabriel L. Somlo
2014-02-17 18:01 ` Gabriel L. Somlo
2014-02-17 18:01 ` [Qemu-devel] " Gabriel L. Somlo
2014-02-17 18:06 ` Paolo Bonzini
2014-02-17 18:06 ` [Qemu-devel] " Paolo Bonzini
2014-02-17 19:38 ` Gabriel L. Somlo
2014-02-17 19:38 ` [Qemu-devel] " Gabriel L. Somlo
2014-02-18 0:58 ` Gabriel L. Somlo
2014-02-18 0:58 ` [Qemu-devel] " Gabriel L. Somlo
2014-02-27 17:05 ` [PATCH RFC] kvm: ignore apic polarity Michael S. Tsirkin
2014-02-27 17:05 ` [Qemu-devel] " Michael S. Tsirkin
2014-02-27 21:41 ` Gabriel L. Somlo
2014-02-27 21:41 ` [Qemu-devel] " Gabriel L. Somlo
2014-02-27 22:30 ` Paolo Bonzini
2014-02-27 22:30 ` [Qemu-devel] " Paolo Bonzini
2014-02-27 23:13 ` Gabriel L. Somlo
2014-02-27 23:13 ` [Qemu-devel] " Gabriel L. Somlo
2014-02-27 23:31 ` Paolo Bonzini
2014-02-27 23:31 ` [Qemu-devel] " Paolo Bonzini
2014-02-28 4:06 ` [RFC PATCH v2] kvm: x86: ignore ioapic polarity Gabriel L. Somlo
2014-02-28 4:06 ` [Qemu-devel] " Gabriel L. Somlo
2014-02-28 17:23 ` [Qemu-devel] [RFC PATCH] qemu: " Gabriel L. Somlo
2014-02-28 18:57 ` [Qemu-devel] [RFC PATCH v2] " Gabriel L. Somlo
2014-02-28 19:14 ` [Qemu-devel] [PATCH] qemu: x86: report lapic version as 0x14 instead of 0x11 Gabriel L. Somlo
2014-03-01 3:44 ` Alexander Graf
2014-03-01 4:25 ` Gabriel L. Somlo
2014-03-01 5:45 ` Alexander Graf
2014-03-01 14:46 ` Paolo Bonzini
2014-03-02 0:17 ` Gabriel L. Somlo
2014-03-02 8:56 ` Paolo Bonzini
2014-03-02 14:31 ` Michael S. Tsirkin
2014-03-02 16:02 ` Michael S. Tsirkin
2014-03-06 7:50 ` Michael S. Tsirkin
2014-03-02 14:52 ` [Qemu-devel] [RFC PATCH v2] qemu: x86: ignore ioapic polarity Michael S. Tsirkin
2014-03-02 16:15 ` Gabriel L. Somlo
2014-03-02 17:09 ` Michael S. Tsirkin
2014-03-06 7:45 ` Michael S. Tsirkin
2014-03-02 14:55 ` [RFC PATCH v2] kvm: " Michael S. Tsirkin
2014-03-02 14:55 ` [Qemu-devel] " Michael S. Tsirkin
2014-03-13 10:53 ` Paolo Bonzini
2014-03-13 10:53 ` [Qemu-devel] " Paolo Bonzini
2014-03-13 13:43 ` Gabriel L. Somlo
2014-03-13 13:43 ` [Qemu-devel] " Gabriel L. Somlo
2014-02-28 4:55 ` [PATCH RFC] kvm: ignore apic polarity Michael S. Tsirkin
2014-02-28 4:55 ` [Qemu-devel] " Michael S. Tsirkin
2014-02-28 8:10 ` Paolo Bonzini
2014-02-28 8:10 ` [Qemu-devel] " Paolo Bonzini
2014-02-28 8:11 ` Paolo Bonzini [this message]
2014-02-28 8:11 ` Paolo Bonzini
2014-03-01 5:03 ` Alex Williamson
2014-03-01 5:03 ` [Qemu-devel] " Alex Williamson
2014-02-16 11:34 ` RFC: ioapic polarity vs. qemu os-x guest Michael S. Tsirkin
2014-02-16 11:34 ` [Qemu-devel] " Michael S. Tsirkin
2014-02-16 15:12 ` Peter Maydell
2014-02-16 11:37 ` Michael S. Tsirkin
2014-02-16 11:37 ` [Qemu-devel] " Michael S. Tsirkin
2014-01-29 23:13 ` [Qemu-devel] OSX guest vs. kvm ioapic polarity Alexander Graf
2014-01-30 15:56 ` Gabriel L. Somlo
2014-01-28 20:40 ` [Qemu-devel] osx bootloader Gabriel L. Somlo
2014-01-28 22:51 ` BALATON Zoltan
2014-01-29 3:07 ` Gabriel L. Somlo
2014-01-29 11:29 ` BALATON Zoltan
2014-01-29 14:53 ` Gabriel L. Somlo
2014-01-29 15:00 ` Alexander Graf
2014-01-30 0:15 ` BALATON Zoltan
2014-02-01 17:43 ` BALATON Zoltan
2014-02-01 0:38 ` BALATON Zoltan
2014-02-01 10:07 ` Alexander Graf
2014-02-01 14:35 ` [Qemu-devel] OVMF with q35 (was: osx bootloader) BALATON Zoltan
2014-02-01 15:13 ` Alexander Graf
2014-02-01 17:38 ` BALATON Zoltan
2014-02-03 7:47 ` Gerd Hoffmann
2014-02-01 21:19 ` [Qemu-devel] osx bootloader Paolo Bonzini
2014-02-02 2:18 ` BALATON Zoltan
2014-01-29 12:10 ` BALATON Zoltan
2014-01-29 14:20 ` Alexander Graf
2014-01-21 11:38 ` [Qemu-devel] RFC: ACPI, HPET._CRS, MacOSX vs. WinXP Michael S. Tsirkin
2014-01-20 20:23 ` Michael S. Tsirkin
2014-01-20 12:03 ` Igor Mammedov
2014-01-09 8:46 ` [Qemu-devel] [PATCH] Add option to disable FDC from ISA bus and ACPI on i386 Markus Armbruster
2014-01-09 10:24 ` Paolo Bonzini
2014-01-31 19:03 ` [Qemu-devel] [RFC PATCH v2] Add option to switch off FDC Gabriel L. Somlo
2014-01-31 19:39 ` Eric Blake
2014-02-02 13:47 ` Michael S. Tsirkin
2014-02-10 14:10 ` Marcel Apfelbaum
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