diff --git a/Bugfix-hw-acpi-Use-max_cpus-instead-of-cpus-when-bui.patch b/Bugfix-hw-acpi-Use-max_cpus-instead-of-cpus-when-bui.patch
new file mode 100644
index 0000000000000000000000000000000000000000..8d492058d77ba70d51c88bffcbef7a1ae7b28adb
--- /dev/null
+++ b/Bugfix-hw-acpi-Use-max_cpus-instead-of-cpus-when-bui.patch
@@ -0,0 +1,32 @@
+From 38734e26ce3840d459da13607a9d46de24a15388 Mon Sep 17 00:00:00 2001
+From: kevinZhu <zhukeqian94@163.com>
+Date: Thu, 29 Oct 2020 19:24:48 +0800
+Subject: [PATCH] Bugfix: hw/acpi: Use max_cpus instead of cpus when build PPTT
+ table
+
+The field "cpus" is the initial number of CPU for guest, and the field "max_cpus"
+is the max number of CPU after CPU hotplug. When building PPTT for guest, we
+should take all CPUs into account, otherwise the "smp_sockets" is wrong.
+
+Fixes: 7cfcd8c8a2fe ("build smt processor structure to support smt topology")
+Signed-off-by: Keqian Zhu <zhukeqian1@huawei.com>
+---
+ hw/acpi/aml-build.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c
+index 8a3b51c835..f01669df57 100644
+--- a/hw/acpi/aml-build.c
++++ b/hw/acpi/aml-build.c
+@@ -167,7 +167,7 @@ void build_pptt(GArray *table_data, BIOSLinker *linker, int possible_cpus)
+     struct offset_status offset;
+     const MachineState *ms = MACHINE(qdev_get_machine());
+     unsigned int smp_cores = ms->smp.cores;
+-    unsigned int smp_sockets = ms->smp.cpus / (smp_cores * ms->smp.threads);
++    unsigned int smp_sockets = ms->smp.max_cpus / (smp_cores * ms->smp.threads);
+ 
+     acpi_data_push(table_data, sizeof(AcpiTableHeader));
+ 
+-- 
+2.27.0
+
diff --git a/qemu.spec b/qemu.spec
index 0ee8c52d16ce0831ef223c66b4fde78d1c611b10..23610863a4a4e524614a255073a532c92e4334d9 100644
--- a/qemu.spec
+++ b/qemu.spec
@@ -1,6 +1,6 @@
 Name: qemu
 Version: 4.1.0
-Release: 33
+Release: 34
 Epoch: 2
 Summary: QEMU is a generic and open source machine emulator and virtualizer
 License: GPLv2 and BSD and MIT and CC-BY
@@ -279,6 +279,7 @@ Patch0266: migration-multifd-fix-hangup-with-TLS-Multifd-due-to.patch
 Patch0267: multifd-tls-fix-memoryleak-of-the-QIOChannelSocket-o.patch
 Patch0268: net-remove-an-assert-call-in-eth_get_gso_type.patch
 Patch0269: json-Fix-a-memleak-in-parse_pair.patch
+Patch0270: Bugfix-hw-acpi-Use-max_cpus-instead-of-cpus-when-bui.patch
 
 BuildRequires: flex
 BuildRequires: bison
@@ -625,6 +626,9 @@ getent passwd qemu >/dev/null || \
 %endif
 
 %changelog
+* Thu Oct 29 2020 Huawei Technologies Co., Ltd <alex.chen@huawei.com>
+- Bugfix: hw/acpi: Use max_cpus instead of cpus when build PPTT table
+
 * Fri Nov 13 2020 Huawei Technologies Co., Ltd <alex.chen@huawei.com>
 - json: Fix a memleak in parse_pair()