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From: Avi Kivity <avi@redhat.com>
To: Jan Kiszka <jan.kiszka@web.de>
Cc: Marcelo Tosatti <mtosatti@redhat.com>,
	kvm@vger.kernel.org, qemu-devel <qemu-devel@nongnu.org>,
	Anthony Liguori <aliguori@us.ibm.com>,
	"Michael S. Tsirkin" <mst@redhat.com>,
	Blue Swirl <blauwirbel@gmail.com>
Subject: Re: [RFC][PATCH 10/16] memory: Introduce memory_region_init_reservation
Date: Sun, 04 Dec 2011 15:20:26 +0200	[thread overview]
Message-ID: <4EDB739A.8080201@redhat.com> (raw)
In-Reply-To: <eca7ce0c4550c1052b0258175d421aab048dc474.1322910904.git.jan.kiszka@web.de>

On 12/03/2011 01:17 PM, Jan Kiszka wrote:
> From: Jan Kiszka <jan.kiszka@siemens.com>
>
> Introduce a memory region type that can reserve I/O space. Such regions
> are useful for modeling I/O that is only handled outside of QEMU, i.e.
> in the context of an accelerator like KVM. Any access to such a region
> from QEMU is a bug and will be reported as such.

This is guest triggerable (DMA into the region), so abort() is too drastic.

> +void memory_region_init_reservation(MemoryRegion *mr,
> +                                    const char *name,
> +                                    uint64_t size)
> +{
> +    memory_region_init(mr, name, size);
> +    mr->ops = &reservation_ops;
> +    mr->opaque = mr;
> +    mr->terminates = true;
> +    mr->backend_registered = false;
> +}

Just calling memory_region_init_io() is simpler, no?


-- 
error compiling committee.c: too many arguments to function


WARNING: multiple messages have this Message-ID (diff)
From: Avi Kivity <avi@redhat.com>
To: Jan Kiszka <jan.kiszka@web.de>
Cc: Anthony Liguori <aliguori@us.ibm.com>,
	kvm@vger.kernel.org, "Michael S. Tsirkin" <mst@redhat.com>,
	Marcelo Tosatti <mtosatti@redhat.com>,
	qemu-devel <qemu-devel@nongnu.org>,
	Blue Swirl <blauwirbel@gmail.com>
Subject: Re: [Qemu-devel] [RFC][PATCH 10/16] memory: Introduce memory_region_init_reservation
Date: Sun, 04 Dec 2011 15:20:26 +0200	[thread overview]
Message-ID: <4EDB739A.8080201@redhat.com> (raw)
In-Reply-To: <eca7ce0c4550c1052b0258175d421aab048dc474.1322910904.git.jan.kiszka@web.de>

On 12/03/2011 01:17 PM, Jan Kiszka wrote:
> From: Jan Kiszka <jan.kiszka@siemens.com>
>
> Introduce a memory region type that can reserve I/O space. Such regions
> are useful for modeling I/O that is only handled outside of QEMU, i.e.
> in the context of an accelerator like KVM. Any access to such a region
> from QEMU is a bug and will be reported as such.

This is guest triggerable (DMA into the region), so abort() is too drastic.

> +void memory_region_init_reservation(MemoryRegion *mr,
> +                                    const char *name,
> +                                    uint64_t size)
> +{
> +    memory_region_init(mr, name, size);
> +    mr->ops = &reservation_ops;
> +    mr->opaque = mr;
> +    mr->terminates = true;
> +    mr->backend_registered = false;
> +}

Just calling memory_region_init_io() is simpler, no?


-- 
error compiling committee.c: too many arguments to function

  reply	other threads:[~2011-12-04 13:20 UTC|newest]

Thread overview: 107+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-12-03 11:17 [RFC][PATCH 00/16] uq/master: Introduce basic irqchip support Jan Kiszka
2011-12-03 11:17 ` [Qemu-devel] " Jan Kiszka
2011-12-03 11:17 ` [RFC][PATCH 01/16] msi: Generalize msix_supported to msi_supported Jan Kiszka
2011-12-03 11:17   ` [Qemu-devel] " Jan Kiszka
2011-12-04 10:42   ` Michael S. Tsirkin
2011-12-04 10:42     ` [Qemu-devel] " Michael S. Tsirkin
2011-12-04 10:42     ` Jan Kiszka
2011-12-04 10:42       ` [Qemu-devel] " Jan Kiszka
2011-12-04 13:12   ` Avi Kivity
2011-12-04 13:12     ` [Qemu-devel] " Avi Kivity
2011-12-04 13:16     ` Jan Kiszka
2011-12-04 13:16       ` [Qemu-devel] " Jan Kiszka
2011-12-04 13:26       ` Avi Kivity
2011-12-04 13:26         ` [Qemu-devel] " Avi Kivity
2011-12-03 11:17 ` [RFC][PATCH 02/16] kvm: Move kvmclock into hw/kvm folder Jan Kiszka
2011-12-03 11:17   ` [Qemu-devel] " Jan Kiszka
2011-12-03 19:00   ` Andreas Färber
2011-12-03 19:00     ` Andreas Färber
2011-12-03 22:33     ` Jan Kiszka
2011-12-03 22:33       ` [Qemu-devel] " Jan Kiszka
2011-12-04 10:43       ` Avi Kivity
2011-12-04 10:43         ` Avi Kivity
2011-12-04 10:46         ` Jan Kiszka
2011-12-04 10:46           ` Jan Kiszka
2011-12-05 10:43       ` Andreas Färber
2011-12-03 11:17 ` [RFC][PATCH 03/16] apic: Stop timer on reset Jan Kiszka
2011-12-03 11:17   ` [Qemu-devel] " Jan Kiszka
2011-12-03 11:17 ` [RFC][PATCH 04/16] apic: Factor out core for KVM reuse Jan Kiszka
2011-12-03 11:17   ` [Qemu-devel] " Jan Kiszka
2011-12-03 11:17 ` [RFC][PATCH 05/16] apic: Open-code timer save/restore Jan Kiszka
2011-12-03 11:17   ` [Qemu-devel] " Jan Kiszka
2011-12-03 11:17 ` [RFC][PATCH 06/16] i8259: Factor out core for KVM reuse Jan Kiszka
2011-12-03 11:17   ` [Qemu-devel] " Jan Kiszka
2011-12-03 11:17 ` [RFC][PATCH 07/16] ioapic: Convert to memory API Jan Kiszka
2011-12-03 11:17   ` [Qemu-devel] " Jan Kiszka
2011-12-03 11:17 ` [RFC][PATCH 08/16] ioapic: Reject non-dword accesses to IOWIN register Jan Kiszka
2011-12-03 11:17   ` [Qemu-devel] " Jan Kiszka
2011-12-03 11:17 ` [RFC][PATCH 09/16] ioapic: Factor out core for KVM reuse Jan Kiszka
2011-12-03 11:17   ` [Qemu-devel] " Jan Kiszka
2011-12-03 11:17 ` [RFC][PATCH 10/16] memory: Introduce memory_region_init_reservation Jan Kiszka
2011-12-03 11:17   ` [Qemu-devel] " Jan Kiszka
2011-12-04 13:20   ` Avi Kivity [this message]
2011-12-04 13:20     ` Avi Kivity
2011-12-04 13:24     ` Jan Kiszka
2011-12-04 13:24       ` [Qemu-devel] " Jan Kiszka
2011-12-03 11:17 ` [RFC][PATCH 11/16] kvm: Introduce core services for in-kernel irqchip support Jan Kiszka
2011-12-03 11:17   ` [Qemu-devel] " Jan Kiszka
2011-12-04 13:23   ` Avi Kivity
2011-12-04 13:23     ` [Qemu-devel] " Avi Kivity
2011-12-04 13:27     ` Jan Kiszka
2011-12-04 13:27       ` [Qemu-devel] " Jan Kiszka
2011-12-04 13:28       ` Avi Kivity
2011-12-04 13:28         ` [Qemu-devel] " Avi Kivity
2011-12-04 13:30         ` Jan Kiszka
2011-12-04 13:30           ` [Qemu-devel] " Jan Kiszka
2011-12-04 13:32           ` Avi Kivity
2011-12-04 13:32             ` [Qemu-devel] " Avi Kivity
2011-12-03 11:17 ` [RFC][PATCH 12/16] kvm: x86: Establish IRQ0 override control Jan Kiszka
2011-12-03 11:17   ` [Qemu-devel] " Jan Kiszka
2011-12-03 11:17 ` [RFC][PATCH 13/16] kvm: x86: Add user space part for in-kernel APIC Jan Kiszka
2011-12-03 11:17   ` [Qemu-devel] " Jan Kiszka
2011-12-04 13:24   ` Avi Kivity
2011-12-04 13:24     ` [Qemu-devel] " Avi Kivity
2011-12-03 11:17 ` [RFC][PATCH 14/16] kvm: x86: Add user space part for in-kernel i8259 Jan Kiszka
2011-12-03 11:17   ` [Qemu-devel] " Jan Kiszka
2011-12-04 13:31   ` Avi Kivity
2011-12-04 13:31     ` [Qemu-devel] " Avi Kivity
2011-12-04 13:42     ` Jan Kiszka
2011-12-04 13:42       ` [Qemu-devel] " Jan Kiszka
2011-12-04 13:49       ` Avi Kivity
2011-12-04 13:49         ` [Qemu-devel] " Avi Kivity
2011-12-04 13:51         ` Jan Kiszka
2011-12-04 13:51           ` [Qemu-devel] " Jan Kiszka
2011-12-04 14:04           ` Avi Kivity
2011-12-04 14:04             ` [Qemu-devel] " Avi Kivity
2011-12-04 14:06             ` Jan Kiszka
2011-12-04 14:06               ` [Qemu-devel] " Jan Kiszka
2011-12-04 15:12               ` Avi Kivity
2011-12-04 15:12                 ` [Qemu-devel] " Avi Kivity
2011-12-04 15:19                 ` Jan Kiszka
2011-12-04 15:19                   ` [Qemu-devel] " Jan Kiszka
2011-12-04 16:35                   ` Avi Kivity
2011-12-04 16:35                     ` [Qemu-devel] " Avi Kivity
2011-12-04 21:31                     ` Blue Swirl
2011-12-04 21:31                       ` [Qemu-devel] " Blue Swirl
2011-12-04 21:38                       ` Jan Kiszka
2011-12-04 21:38                         ` [Qemu-devel] " Jan Kiszka
2011-12-05 10:01                         ` Avi Kivity
2011-12-05 10:01                           ` [Qemu-devel] " Avi Kivity
2011-12-05 11:37                           ` Jan Kiszka
2011-12-05 11:37                             ` [Qemu-devel] " Jan Kiszka
2011-12-05 12:36                             ` Avi Kivity
2011-12-05 12:36                               ` [Qemu-devel] " Avi Kivity
2011-12-05 12:47                               ` Jan Kiszka
2011-12-05 12:47                                 ` [Qemu-devel] " Jan Kiszka
2011-12-05 13:14                                 ` Avi Kivity
2011-12-05 13:14                                   ` [Qemu-devel] " Avi Kivity
2011-12-05 13:29                                   ` Jan Kiszka
2011-12-05 13:29                                     ` [Qemu-devel] " Jan Kiszka
2011-12-05 13:36                                     ` Avi Kivity
2011-12-05 13:36                                       ` [Qemu-devel] " Avi Kivity
2011-12-05 13:55                                       ` Jan Kiszka
2011-12-05 13:55                                         ` [Qemu-devel] " Jan Kiszka
2011-12-03 11:17 ` [RFC][PATCH 15/16] kvm: x86: Add user space part for in-kernel IOAPIC Jan Kiszka
2011-12-03 11:17   ` [Qemu-devel] " Jan Kiszka
2011-12-03 11:17 ` [RFC][PATCH 16/16] kvm: Arm in-kernel irqchip support Jan Kiszka
2011-12-03 11:17   ` [Qemu-devel] " Jan Kiszka

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