From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:40876) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Vv83T-0006zL-Mi for qemu-devel@nongnu.org; Mon, 23 Dec 2013 11:08:37 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Vv83M-0000zf-FY for qemu-devel@nongnu.org; Mon, 23 Dec 2013 11:08:31 -0500 Received: from mx1.redhat.com ([209.132.183.28]:45518) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Vv83M-0000zV-4S for qemu-devel@nongnu.org; Mon, 23 Dec 2013 11:08:24 -0500 Date: Mon, 23 Dec 2013 18:12:18 +0200 From: "Michael S. Tsirkin" Message-ID: <1387815007-1272-18-git-send-email-mst@redhat.com> References: <1387815007-1272-1-git-send-email-mst@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1387815007-1272-1-git-send-email-mst@redhat.com> Subject: [Qemu-devel] [PULL 17/19] piix: fix 32bit pci hole List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Laszlo Ersek , Gerd Hoffmann , Anthony Liguori From: Gerd Hoffmann Make the 32bit pci hole start at end of ram, so all possible address space is covered. We used to try and make addresses aligned so they are easier to cover with MTRRs, but since they are cosmetic on KVM, this is probably not worth worrying about. Of course the firmware can use less than that. Leaving space unused is no problem, mapping pci bars outside the hole causes problems though. Signed-off-by: Gerd Hoffmann Signed-off-by: Laszlo Ersek Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- include/hw/i386/pc.h | 1 + hw/i386/pc_piix.c | 1 + hw/pci-host/piix.c | 11 ++--------- 3 files changed, 4 insertions(+), 9 deletions(-) diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h index 24eb3de..eb3da96 100644 --- a/include/hw/i386/pc.h +++ b/include/hw/i386/pc.h @@ -182,6 +182,7 @@ PCIBus *i440fx_init(PCII440FXState **pi440fx_state, int *piix_devfn, MemoryRegion *address_space_mem, MemoryRegion *address_space_io, ram_addr_t ram_size, + ram_addr_t below_4g_mem_size, ram_addr_t above_4g_mem_size, MemoryRegion *pci_memory, MemoryRegion *ram_memory); diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c index 832e20c..2766414 100644 --- a/hw/i386/pc_piix.c +++ b/hw/i386/pc_piix.c @@ -170,6 +170,7 @@ static void pc_init1(QEMUMachineInitArgs *args, if (pci_enabled) { pci_bus = i440fx_init(&i440fx_state, &piix3_devfn, &isa_bus, gsi, system_memory, system_io, args->ram_size, + below_4g_mem_size, above_4g_mem_size, pci_memory, ram_memory); } else { diff --git a/hw/pci-host/piix.c b/hw/pci-host/piix.c index 63be7f6..4229d09 100644 --- a/hw/pci-host/piix.c +++ b/hw/pci-host/piix.c @@ -311,6 +311,7 @@ PCIBus *i440fx_init(PCII440FXState **pi440fx_state, MemoryRegion *address_space_mem, MemoryRegion *address_space_io, ram_addr_t ram_size, + ram_addr_t below_4g_mem_size, ram_addr_t above_4g_mem_size, MemoryRegion *pci_address_space, MemoryRegion *ram_memory) @@ -340,15 +341,7 @@ PCIBus *i440fx_init(PCII440FXState **pi440fx_state, f->ram_memory = ram_memory; i440fx = I440FX_PCI_HOST_BRIDGE(dev); - /* Set PCI window size the way seabios has always done it. */ - /* Power of 2 so bios can cover it with a single MTRR */ - if (ram_size <= 0x80000000) { - i440fx->pci_info.w32.begin = 0x80000000; - } else if (ram_size <= 0xc0000000) { - i440fx->pci_info.w32.begin = 0xc0000000; - } else { - i440fx->pci_info.w32.begin = 0xe0000000; - } + i440fx->pci_info.w32.begin = below_4g_mem_size; /* setup pci memory mapping */ pc_pci_as_mapping_init(OBJECT(f), f->system_memory, -- MST