From 2a2367d46d7a4ee4122b7a86e57125542dbbe963 Mon Sep 17 00:00:00 2001
From: Bibo Mao <maobibo@loongson.cn>
Date: Mon, 17 Aug 2026 22:07:05 +0800
Subject: [PATCH] LoongArch: Fix acpi_package_ids[] array overflow

With LoongArch virt machine, a typical setting is one core per socket,
there will max 256 sockets (packages) on one VM. With PPTT acpi table,
array acpi_package_ids[] will be overflowed.

Here change the array size of acpi_package_ids[] with the max value of
MAX_PACKAGES and KVM_MAX_VCPUS.

Cc: stable@vger.kernel.org # 6.7+
Fixes: 4e8f58620f67 ("LoongArch: Retrieve CPU package ID from PPTT when available")
Reviewed-by: Tao Cui <cuitao@kylinos.cn>
Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
---
 arch/loongarch/kernel/acpi.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/loongarch/kernel/acpi.c b/arch/loongarch/kernel/acpi.c
index 873e90990771..cb454ee92b20 100644
--- a/arch/loongarch/kernel/acpi.c
+++ b/arch/loongarch/kernel/acpi.c
@@ -13,6 +13,7 @@
 #include <linux/export.h>
 #include <linux/irq.h>
 #include <linux/irqdomain.h>
+#include <linux/kvm_host.h>
 #include <linux/memblock.h>
 #include <linux/of_fdt.h>
 #include <linux/serial_core.h>
@@ -202,7 +203,7 @@ static void __init acpi_process_madt(void)
 
 int pptt_enabled;
 static int acpi_nr_packages;
-static int acpi_package_ids[MAX_PACKAGES];
+static int acpi_package_ids[MAX(MAX_PACKAGES, KVM_MAX_VCPUS)];
 
 int __init parse_acpi_topology(void)
 {