From: Peter Maydell <peter.maydell@linaro.org>
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: "Gabriel L. Somlo" <gsomlo@gmail.com>,
eddie.dong@intel.com, QEMU Developers <qemu-devel@nongnu.org>,
kvm-devel <kvm@vger.kernel.org>, Alexander Graf <agraf@suse.de>
Subject: Re: [Qemu-devel] RFC: ioapic polarity vs. qemu os-x guest
Date: Sun, 16 Feb 2014 15:12:17 +0000 [thread overview]
Message-ID: <CAFEAcA8LDDUXPBF94w3NToVi9WNhp-G+ZgY7NChu0P_7P7L=iw@mail.gmail.com> (raw)
In-Reply-To: <20140216113444.GD28991@redhat.com>
On 16 February 2014 11:34, Michael S. Tsirkin <mst@redhat.com> wrote:
> Hmm no this is all wrong, from API point of view,
> devices shoud not care about value of interrupt.
> They just assert/deassert interrupts.
> It so happens that 1 means assert 0 means deassert.
Yeah, we generally model things as active-high even if the
hardware really treats the signal as active-low. (Among other
things there are some issues around how exactly device reset
should interact with a signal that is supposed to be high coming
out of reset, given you don't know whether the device at the
other end of the line has reset yet or not.)
This is great up until the point where you have a generic
GPIO device one of whose GPIO output lines happens to
be wired to an interrupt controller, of course.
thanks
-- PMM
next prev parent reply other threads:[~2014-02-16 15:12 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
2014-02-28 8:11 ` [Qemu-devel] " 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 [this message]
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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