From: Gleb Natapov <gleb@redhat.com>
To: Avi Kivity <avi@redhat.com>
Cc: Anthony Liguori <anthony@codemonkey.ws>,
qemu-devel@nongnu.org, kvm@vger.kernel.org
Subject: Re: [Qemu-devel] [RFC v5 86/86] 440fx: fix PAM, PCI holes
Date: Mon, 25 Jul 2011 16:17:28 +0300 [thread overview]
Message-ID: <20110725131728.GD4404@redhat.com> (raw)
In-Reply-To: <4E2D6C45.5030308@redhat.com>
On Mon, Jul 25, 2011 at 04:14:45PM +0300, Avi Kivity wrote:
> On 07/25/2011 04:07 PM, Anthony Liguori wrote:
> >On 07/20/2011 11:50 AM, Avi Kivity wrote:
> >>The current implementation of PAM and the PCI holes is broken in several
> >>ways:
> >>
> >> - PCI BARs are not restricted to the PCI hole (a BAR may hide memory)
> >
> >Technically, a BAR can be mapped to any non-RAM memory location.
>
> I understood TOM (Top Of Memory) to be fixed - can't find a register
> for it - but maybe I misread the spec.
>
PIIX3 spec:
2.2.11. TOM—TOP OF MEMORY REGISTER (Function 0)
Address Offset: 69h
Default Value: 02h
Attribute: Read/Write
--
Gleb.
WARNING: multiple messages have this Message-ID (diff)
From: Gleb Natapov <gleb@redhat.com>
To: Avi Kivity <avi@redhat.com>
Cc: qemu-devel@nongnu.org, kvm@vger.kernel.org
Subject: Re: [Qemu-devel] [RFC v5 86/86] 440fx: fix PAM, PCI holes
Date: Mon, 25 Jul 2011 16:17:28 +0300 [thread overview]
Message-ID: <20110725131728.GD4404@redhat.com> (raw)
In-Reply-To: <4E2D6C45.5030308@redhat.com>
On Mon, Jul 25, 2011 at 04:14:45PM +0300, Avi Kivity wrote:
> On 07/25/2011 04:07 PM, Anthony Liguori wrote:
> >On 07/20/2011 11:50 AM, Avi Kivity wrote:
> >>The current implementation of PAM and the PCI holes is broken in several
> >>ways:
> >>
> >> - PCI BARs are not restricted to the PCI hole (a BAR may hide memory)
> >
> >Technically, a BAR can be mapped to any non-RAM memory location.
>
> I understood TOM (Top Of Memory) to be fixed - can't find a register
> for it - but maybe I misread the spec.
>
PIIX3 spec:
2.2.11. TOM—TOP OF MEMORY REGISTER (Function 0)
Address Offset: 69h
Default Value: 02h
Attribute: Read/Write
--
Gleb.
next prev parent reply other threads:[~2011-07-25 13:17 UTC|newest]
Thread overview: 218+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-20 16:49 [RFC v5 00/86] Memory API Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 01/86] xen: fix xen-mapcache build on non-Xen capable targets Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 02/86] Hierarchical memory region API Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 03/86] memory: implement dirty tracking Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 04/86] memory: merge adjacent segments of a single memory region Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 05/86] Internal interfaces for memory API Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 06/86] memory: abstract address space operations Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 07/86] memory: rename MemoryRegion::has_ram_addr to ::terminates Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 08/86] memory: late initialization of ram_addr Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 09/86] memory: I/O address space support Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 10/86] memory: add backward compatibility for old portio registration Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 11/86] memory: add backward compatibility for old mmio registration Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 12/86] memory: add ioeventfd support Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-21 19:55 ` Blue Swirl
2011-07-22 7:05 ` Avi Kivity
2011-07-22 7:05 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 13/86] memory: separate building the final memory map into two steps Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 14/86] exec.c: initialize memory map Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 15/86] ioport: register ranges by byte aligned addresses always Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 16/86] pc: grab system_memory Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 17/86] pc: convert pc_memory_init() to memory API Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 18/86] pc: move global memory map out of pc_init1() and into its callers Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 19/86] pci: pass address space to pci bus when created Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 20/86] pci: add MemoryRegion based BAR management API Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 21/86] sysbus: add MemoryRegion based memory " Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 22/86] usb-ohci: convert to MemoryRegion Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 23/86] pci: add API to get a BAR's mapped address Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 24/86] vmsvga: don't remember pci BAR address in callback any more Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 25/86] vga: convert vga and its derivatives to the memory API Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 26/86] cirrus: simplify mmio BAR access functions Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 27/86] cirrus: simplify bitblt " Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 28/86] cirrus: simplify vga window mmio " Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 29/86] vga: " Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 30/86] cirrus: simplify linear framebuffer " Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 31/86] Integrate I/O memory regions into qemu Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 32/86] exec.c: fix initialization of system I/O memory region Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 33/86] pci: pass I/O address space to new PCI bus Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 34/86] pci: allow I/O BARs to be registered with pci_register_bar_region() Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 35/86] rtl8139: convert to memory API Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 36/86] ac97: " Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 37/86] e1000: " Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 38/86] eepro100: " Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 39/86] es1370: " Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 40/86] ide: " Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 41/86] ivshmem: " Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 42/86] virtio-pci: " Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 43/86] ahci: " Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 44/86] intel-hda: " Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 45/86] lsi53c895a: " Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 46/86] ppc: " Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 47/86] ne2000: " Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 48/86] pcnet: " Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:49 ` [RFC v5 49/86] i6300esb: " Avi Kivity
2011-07-20 16:49 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:50 ` [RFC v5 50/86] isa-mmio: concert " Avi Kivity
2011-07-20 16:50 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:50 ` [RFC v5 51/86] sun4u: convert " Avi Kivity
2011-07-20 16:50 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:50 ` [RFC v5 52/86] ehci: " Avi Kivity
2011-07-20 16:50 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:50 ` [RFC v5 53/86] uhci: " Avi Kivity
2011-07-20 16:50 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:50 ` [RFC v5 54/86] xen-platform: " Avi Kivity
2011-07-20 16:50 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:50 ` [RFC v5 55/86] msix: " Avi Kivity
2011-07-20 16:50 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:50 ` [RFC v5 56/86] pci: remove pci_register_bar_simple() Avi Kivity
2011-07-20 16:50 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:50 ` [RFC v5 57/86] pci: convert pci rom to memory API Avi Kivity
2011-07-20 16:50 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:50 ` [RFC v5 58/86] pci: remove pci_register_bar() Avi Kivity
2011-07-20 16:50 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:50 ` [RFC v5 59/86] pci: fold BAR mapping function into its caller Avi Kivity
2011-07-20 16:50 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:50 ` [RFC v5 60/86] pci: rename pci_register_bar_region() to pci_register_bar() Avi Kivity
2011-07-20 16:50 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:50 ` [RFC v5 61/86] pci: remove support for pre memory API BARs Avi Kivity
2011-07-20 16:50 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:50 ` [RFC v5 62/86] Introduce QEMU_NEW() Avi Kivity
2011-07-20 16:50 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:50 ` [RFC v5 63/86] apb_pci: convert to memory API Avi Kivity
2011-07-20 16:50 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:50 ` [RFC v5 64/86] apic: " Avi Kivity
2011-07-20 16:50 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:50 ` [RFC v5 65/86] arm_gic: " Avi Kivity
2011-07-20 16:50 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:50 ` [RFC v5 66/86] arm_sysctl: " Avi Kivity
2011-07-20 16:50 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:50 ` [RFC v5 67/86] arm_timer: " Avi Kivity
2011-07-20 16:50 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:50 ` [RFC v5 68/86] armv7m: " Avi Kivity
2011-07-20 16:50 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:50 ` [RFC v5 69/86] gt64xxx.c: " Avi Kivity
2011-07-20 16:50 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:50 ` [RFC v5 70/86] tusb6010: move declarations to new file tusb6010.h Avi Kivity
2011-07-20 16:50 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:50 ` [RFC v5 71/86] omap_gpmc/nseries/tusb6010: convert to memory API Avi Kivity
2011-07-20 16:50 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:50 ` [RFC v5 72/86] onenand: " Avi Kivity
2011-07-20 16:50 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:50 ` [RFC v5 73/86] pcie_host: " Avi Kivity
2011-07-20 16:50 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:50 ` [RFC v5 74/86] ppc405_uc: " Avi Kivity
2011-07-20 16:50 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:50 ` [RFC v5 75/86] ppc4xx_sdram: " Avi Kivity
2011-07-20 16:50 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:50 ` [RFC v5 76/86] stellaris_enet: " Avi Kivity
2011-07-20 16:50 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:50 ` [RFC v5 77/86] sysbus: add a variant of sysbus_init_mmio_cb with an unmap callback Avi Kivity
2011-07-20 16:50 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:50 ` [RFC v5 78/86] sh_pci: convert to memory API Avi Kivity
2011-07-20 16:50 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:50 ` [RFC v5 79/86] arm11mpcore: use sysbus_init_mmio_cb2 Avi Kivity
2011-07-20 16:50 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:50 ` [RFC v5 80/86] versatile_pci: convert to memory API Avi Kivity
2011-07-20 16:50 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:50 ` [RFC v5 81/86] ppce500_pci: convert to sysbus_init_mmio_cb2() Avi Kivity
2011-07-20 16:50 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:50 ` [RFC v5 82/86] sysbus: remove sysbus_init_mmio_cb() Avi Kivity
2011-07-20 16:50 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:50 ` [RFC v5 83/86] isa: add isa_address_space() Avi Kivity
2011-07-20 16:50 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:50 ` [RFC v5 84/86] pci: add pci_address_space() Avi Kivity
2011-07-20 16:50 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:50 ` [RFC v5 85/86] vga: drop get_system_memory() from vga devices and derivatives Avi Kivity
2011-07-20 16:50 ` [Qemu-devel] " Avi Kivity
2011-07-20 16:50 ` [RFC v5 86/86] 440fx: fix PAM, PCI holes Avi Kivity
2011-07-20 16:50 ` [Qemu-devel] " Avi Kivity
2011-07-25 13:07 ` Anthony Liguori
2011-07-25 13:14 ` Avi Kivity
2011-07-25 13:17 ` Gleb Natapov [this message]
2011-07-25 13:17 ` Gleb Natapov
2011-07-25 13:28 ` Avi Kivity
2011-07-25 13:28 ` Avi Kivity
2011-07-25 13:31 ` Gleb Natapov
2011-07-25 13:31 ` Gleb Natapov
2011-07-25 13:31 ` Avi Kivity
2011-07-25 13:31 ` Avi Kivity
2011-07-25 13:35 ` Gleb Natapov
2011-07-25 13:35 ` Gleb Natapov
2011-07-25 13:38 ` Avi Kivity
2011-07-25 13:38 ` Avi Kivity
2011-07-25 13:47 ` Anthony Liguori
2011-07-25 13:47 ` [Qemu-devel] " Anthony Liguori
2011-07-25 13:50 ` Gleb Natapov
2011-07-25 13:50 ` Gleb Natapov
2011-07-25 14:05 ` Avi Kivity
2011-07-25 14:05 ` Avi Kivity
2011-07-25 14:08 ` Anthony Liguori
2011-07-25 14:10 ` Avi Kivity
2011-07-25 13:32 ` Anthony Liguori
2011-07-25 13:32 ` Anthony Liguori
2011-07-25 21:34 ` Eric Northup
2011-07-25 21:34 ` [Qemu-devel] " Eric Northup
2011-07-26 8:01 ` Avi Kivity
2011-07-26 8:01 ` [Qemu-devel] " Avi Kivity
2011-07-20 17:41 ` [RFC v5 00/86] Memory API Jan Kiszka
2011-07-20 17:41 ` [Qemu-devel] " Jan Kiszka
2011-07-20 17:43 ` Avi Kivity
2011-07-20 17:43 ` [Qemu-devel] " Avi Kivity
2011-07-20 21:43 ` Jan Kiszka
2011-07-20 21:43 ` [Qemu-devel] " Jan Kiszka
2011-07-21 8:37 ` Avi Kivity
2011-07-21 13:38 ` Jan Kiszka
2011-07-21 13:43 ` Avi Kivity
2011-07-21 14:19 ` Jan Kiszka
2011-07-21 14:31 ` Avi Kivity
2011-07-21 14:34 ` Jan Kiszka
2011-07-21 14:40 ` Avi Kivity
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