Attachment 885649 Details for Bug 1027565 – proof of concept patch for the analysis in comment 16

[patch] proof of concept patch for the analysis in comment 16

0001-i440fx-reset-PAM-registers-on-reset.patch (text/plain), 1.60 KB, created by Laszlo Ersek on 2014-04-12 05:09:48 UTC

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Creator: Laszlo Ersek

Created: 2014-04-12 05:09:48 UTC

Size: 1.60 KB

patch

obsolete

>From ad42ce0dddff5b68e7bed2a917644b6266355a99 Mon Sep 17 00:00:00 2001
>From: David Woodhouse <dwmw2@infradead.org>
>Date: Sat, 12 Apr 2014 06:45:13 +0200
>Subject: [RHEL-7.1 qemu-kvm PATCH] i440fx: reset PAM registers on reset
>
>Signed-off-by: David Woodhouse <dwmw2@infradead.org>
>Signed-off-by: Laszlo Ersek <lersek@redhat.com>
>---
> hw/pci-host/piix.c | 19 +++++++++++++++++++
> 1 file changed, 19 insertions(+)
>
>diff --git a/hw/pci-host/piix.c b/hw/pci-host/piix.c
>index 5757b1d..ec3277e 100644
>--- a/hw/pci-host/piix.c
>+++ b/hw/pci-host/piix.c
>@@ -684,6 +684,24 @@ static const TypeInfo piix3_xen_info = {
>     .class_init    = piix3_xen_class_init,
> };
> 
>+static void i440fx_reset(DeviceState *ds)
>+{
>+    PCIDevice *dev = DO_UPCAST(PCIDevice, qdev, ds);
>+    PCII440FXState *d = DO_UPCAST(PCII440FXState, dev, dev);
>+    uint8_t *pci_conf = d->dev.config;
>+
>+    pci_conf[0x59] = 0x00; // Reset PAM setup
>+    pci_conf[0x5a] = 0x00;
>+    pci_conf[0x5b] = 0x00;
>+    pci_conf[0x5c] = 0x00;
>+    pci_conf[0x5d] = 0x00;
>+    pci_conf[0x5e] = 0x00;
>+    pci_conf[0x5f] = 0x00;
>+    pci_conf[0x72] = 0x02; // And SMM
>+
>+    i440fx_update_memory_mappings(d);
>+}
>+
> static void i440fx_class_init(ObjectClass *klass, void *data)
> {
>     DeviceClass *dc = DEVICE_CLASS(klass);
>@@ -698,6 +716,7 @@ static void i440fx_class_init(ObjectClass *klass, void *data)
>     k->class_id = PCI_CLASS_BRIDGE_HOST;
>     dc->desc = "Host bridge";
>     dc->vmsd = &vmstate_i440fx;
>+    dc->reset = i440fx_reset;
>     /*
>      * PCI-facing part of the host bridge, not usable without the
>      * host-facing part, which can't be device_add'ed, yet.
>-- 
>1.8.3.1
>

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Attachments on bug 1027565: 885244 | 885245 | 885252 | 885649 | 885650 | 885795 | 885838 | 886494 | 886593 | 886840 | 886841 | 886964 | 888022 | 888273