From ee0da46c9e9f88c25fbc5d66a30c6a2f51157714 Mon Sep 17 00:00:00 2001
From: zhaixiaojuan <67671683+zhaixiaojuan@users.noreply.github.com>
Date: Tue, 10 Dec 2024 09:46:44 +0800
Subject: [PATCH] Add loongarch64 support (#2010)

Signed-off-by: zhaixiaojuan <zhaixiaojuan@loongson.cn>
---
 CMakeLists.txt      | 6 ++++++
 PLATFORMS.md        | 1 +
 src/common/common.c | 5 +++++
 3 files changed, 12 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index d9b97cdd33..114961ed7f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -127,6 +127,12 @@ elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "s390x")
     endif()
 elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "riscv")
     set(ARCH "riscv")
+elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "loongarch64")
+    set(ARCH "loongarch64")
+    set(ARCH_LOONGARCH64 ON)
+    if(${OQS_DIST_BUILD})
+        set(OQS_DIST_LOONGARCH64_BUILD ON)
+    endif()
 elseif(OQS_PERMIT_UNSUPPORTED_ARCHITECTURE)
     message(WARNING "Unknown or unsupported processor: " ${CMAKE_SYSTEM_PROCESSOR})
     message(WARNING "Compilation on an unsupported processor should only be used for testing, as it may result an insecure configuration, for example due to variable-time instructions leaking secret information.")
diff --git a/PLATFORMS.md b/PLATFORMS.md
index 7bd573338b..f1b3fc5ebd 100644
--- a/PLATFORMS.md
+++ b/PLATFORMS.md
@@ -62,3 +62,4 @@ In this policy, the words "must" and "must not" specify absolute requirements th
 - x86 for Windows (Visual Studio Toolchain)
 - ppc641e for Ubuntu (Focal)
 - s390x for Ubuntu (Focal)
+- loongarch64 for Debian Linux (trixie)
diff --git a/src/common/common.c b/src/common/common.c
index cb70d558c0..795f3f97c9 100644
--- a/src/common/common.c
+++ b/src/common/common.c
@@ -206,6 +206,11 @@ static void set_available_cpu_extensions(void) {
 	/* mark that this function has been called */
 	cpu_ext_data[OQS_CPU_EXT_INIT] = 1;
 }
+#elif defined(OQS_DIST_LOONGARCH64_BUILD)
+static void set_available_cpu_extensions(void) {
+	/* mark that this function has been called */
+	cpu_ext_data[OQS_CPU_EXT_INIT] = 1;
+}
 #elif defined(OQS_DIST_BUILD)
 static void set_available_cpu_extensions(void) {
 }