[PATCH] LoongArch: Fix acpi_package_ids array overflow

Bibo Mao <[email protected]> Tue, 4 Aug 2026 15:57:19 +0800
Newsgroups org.kernel.vger.stable,dev.linux.lists.loongarch,org.kernel.vger.linux-kernel
Message-ID <[email protected]>
With LoongArch virt machine, one typical setting is one core per socket,
there will max 256 sockets on one VM. With PPTT acpi table, array
acpi_package_ids will be overflowed.

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

Fixes: 4e8f58620f67 ("LoongArch: Retrieve CPU package ID from PPTT when available")
Cc: [email protected]
Signed-off-by: Bibo Mao <[email protected]>
---
 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)
 {

base-commit: 075b74841bd0065a3bda3440873c747938e69b68
-- 
2.39.3