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From de73bf2cf5f37eab8fd19c4a5a773484c6e6b464 Mon Sep 17 00:00:00 2001
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Message-Id: <de73bf2cf5f37eab8fd19c4a5a773484c6e6b464.1377873636.git.jdenemar@redhat.com>
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From: Laine Stump <laine@laine.org>
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Date: Tue, 6 Aug 2013 13:23:18 -0600
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Subject: [PATCH] conf: add default USB controller in qemu post-parse callback
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This patch is part of the resolution to:
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   https://bugzilla.redhat.com/show_bug.cgi?id=819968
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The parser shouldn't be doing arch-specific things like adding in
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implicit controllers to the config. This should instead be done in the
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hypervisor's post-parse callback.
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This patch removes the auto-add of a usb controller from the domain
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parser, and puts it into the qemu driver's post-parse callback (just
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as is already done with the auto-add of the pci-root controller). In
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the future, any machine/arch that shouldn't have a default usb
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controller added should just set addDefaultUSB = false in this
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function.
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We've recently seen that q35 and ARMV7L domains shouldn't get a default USB
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controller, so I've set addDefaultUSB to false for both of those.
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(cherry picked from commit c66da9d224ffba1d972beaf049c00dbebda4e8ea)
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---
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 src/conf/domain_conf.c |  6 ------
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 src/qemu/qemu_domain.c | 14 +++++++++++++-
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 2 files changed, 13 insertions(+), 7 deletions(-)
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diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
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index 783df96..18c6acf 100644
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--- a/src/conf/domain_conf.c
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+++ b/src/conf/domain_conf.c
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@@ -11718,12 +11718,6 @@ virDomainDefParseXML(xmlDocPtr xml,
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         goto error;
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     }
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-    if (def->virtType == VIR_DOMAIN_VIRT_QEMU ||
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-        def->virtType == VIR_DOMAIN_VIRT_KQEMU ||
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-        def->virtType == VIR_DOMAIN_VIRT_KVM)
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-        if (virDomainDefMaybeAddController(def, VIR_DOMAIN_CONTROLLER_TYPE_USB, 0, -1) < 0)
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-            goto error;
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-
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     /* analysis of the resource leases */
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     if ((n = virXPathNodeSet("./devices/lease", ctxt, &nodes)) < 0) {
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         virReportError(VIR_ERR_INTERNAL_ERROR,
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diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
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index da3b768..648121a 100644
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--- a/src/qemu/qemu_domain.c
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+++ b/src/qemu/qemu_domain.c
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@@ -699,6 +699,7 @@ qemuDomainDefPostParse(virDomainDefPtr def,
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                        virCapsPtr caps,
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                        void *opaque ATTRIBUTE_UNUSED)
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 {
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+    bool addDefaultUSB = true;
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     bool addPCIRoot = false;
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     /* check for emulator and create a default one if needed */
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@@ -714,8 +715,10 @@ qemuDomainDefPostParse(virDomainDefPtr def,
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             break;
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         if (STRPREFIX(def->os.machine, "pc-q35") ||
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             STREQ(def->os.machine, "q35") ||
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-            STREQ(def->os.machine, "isapc"))
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+            STREQ(def->os.machine, "isapc")) {
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+            addDefaultUSB = false;
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             break;
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+        }
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         if (!STRPREFIX(def->os.machine, "pc-0.") &&
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             !STRPREFIX(def->os.machine, "pc-1.") &&
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             !STRPREFIX(def->os.machine, "pc-i440") &&
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@@ -725,6 +728,10 @@ qemuDomainDefPostParse(virDomainDefPtr def,
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         addPCIRoot = true;
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         break;
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+    case VIR_ARCH_ARMV7L:
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+       addDefaultUSB = false;
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+       break;
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+
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     case VIR_ARCH_ALPHA:
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     case VIR_ARCH_PPC:
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     case VIR_ARCH_PPC64:
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@@ -737,6 +744,11 @@ qemuDomainDefPostParse(virDomainDefPtr def,
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         break;
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     }
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+    if (addDefaultUSB &&
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+        virDomainDefMaybeAddController(
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+            def, VIR_DOMAIN_CONTROLLER_TYPE_USB, 0, -1) < 0)
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+        return -1;
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+
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     if (addPCIRoot &&
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         virDomainDefMaybeAddController(
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             def, VIR_DOMAIN_CONTROLLER_TYPE_PCI, 0,
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-- 
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1.8.3.2
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