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View File 0045-pc-fail-memory-hot-plug-unplug-with.patch of Package qemu (Project home:lucidd:branches:Virtualization)

From 097f317248eb261968efb30755e3c91fd9311cea Mon Sep 17 00:00:00 2001
From: Haozhong Zhang <haozhong.zhang@intel.com>
Date: Fri, 22 Dec 2017 09:51:20 +0800
Subject: [PATCH] pc: fail memory hot-plug/unplug with -no-acpi and Q35 machine
 type

When -no-acpi option is used with Q35 machine type, no guest ACPI is
built, but the ACPI device is still created, so only checking the
presence of ACPI device before memory plug/unplug is not enough in
such cases. Check whether ACPI is disabled globally in addition and
fail memory plug/unplug if it's disabled.

Signed-off-by: Haozhong Zhang <haozhong.zhang@intel.com>
Message-Id: <20171222015120.31730-1-haozhong.zhang@intel.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit 8cd91acec8dfea6065272ca828405333f564a612)
[BR: BSC#1077823]
Signed-off-by: Bruce Rogers <brogers@suse.com>
---
 hw/i386/pc.c | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 186545d2a4..e7faf92143 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -1694,9 +1694,14 @@ static void pc_dimm_plug(HotplugHandler *hotplug_dev,
         align = memory_region_get_alignment(mr);
     }
 
-    if (!pcms->acpi_dev) {
+    /*
+     * When -no-acpi is used with Q35 machine type, no ACPI is built,
+     * but pcms->acpi_dev is still created. Check !acpi_enabled in
+     * addition to cover this case.
+     */
+    if (!pcms->acpi_dev || !acpi_enabled) {
         error_setg(&local_err,
-                   "memory hotplug is not enabled: missing acpi device");
+                   "memory hotplug is not enabled: missing acpi device or acpi disabled");
         goto out;
     }
 
@@ -1728,9 +1733,14 @@ static void pc_dimm_unplug_request(HotplugHandler *hotplug_dev,
     Error *local_err = NULL;
     PCMachineState *pcms = PC_MACHINE(hotplug_dev);
 
-    if (!pcms->acpi_dev) {
+    /*
+     * When -no-acpi is used with Q35 machine type, no ACPI is built,
+     * but pcms->acpi_dev is still created. Check !acpi_enabled in
+     * addition to cover this case.
+     */
+    if (!pcms->acpi_dev || !acpi_enabled) {
         error_setg(&local_err,
-                   "memory hotplug is not enabled: missing acpi device");
+                   "memory hotplug is not enabled: missing acpi device or acpi disabled");
         goto out;
     }