From 9496e3985244e054b6e9a50903a2fdc89a76d6ab Mon Sep 17 00:00:00 2001
From: Jingyun Hua <huajingyun@loongson.cn>
Date: Fri, 19 May 2023 17:14:32 +0800
Subject: [PATCH] Add LoongArch64 support

Signed-off-by: Jingyun Hua <huajingyun@loongson.cn>
---
 arch/arch-loongarch64.h | 10 ++++++++++
 arch/arch.h             |  3 +++
 configure               |  4 +++-
 libfio.c                |  1 +
 os/os-linux-syscall.h   | 16 ++++++++++++++++
 5 files changed, 33 insertions(+), 1 deletion(-)
 create mode 100644 arch/arch-loongarch64.h

diff --git a/arch/arch-loongarch64.h b/arch/arch-loongarch64.h
new file mode 100644
index 00000000..43ea83b4
--- /dev/null
+++ b/arch/arch-loongarch64.h
@@ -0,0 +1,10 @@
+#ifndef ARCH_LOONGARCH64_H
+#define ARCH_LOONGARCH64_H
+
+#define FIO_ARCH	(arch_loongarch64)
+
+#define read_barrier()		__asm__ __volatile__("dbar 0": : :"memory")
+#define write_barrier()		__asm__ __volatile__("dbar 0": : :"memory")
+#define nop			__asm__ __volatile__("dbar 0": : :"memory")
+
+#endif
diff --git a/arch/arch.h b/arch/arch.h
index fca003be..6e476701 100644
--- a/arch/arch.h
+++ b/arch/arch.h
@@ -23,6 +23,7 @@ enum {
 	arch_hppa,
 	arch_mips,
 	arch_aarch64,
+	arch_loongarch64,
 
 	arch_generic,
 
@@ -97,6 +98,8 @@ extern unsigned long arch_flags;
 #include "arch-hppa.h"
 #elif defined(__aarch64__)
 #include "arch-aarch64.h"
+#elif defined(__loongarch64)
+#include "arch-loongarch64.h"
 #else
 #warning "Unknown architecture, attempting to use generic model."
 #include "arch-generic.h"
diff --git a/configure b/configure
index ca03350b..74416fd4 100755
--- a/configure
+++ b/configure
@@ -499,13 +499,15 @@ elif check_define __aarch64__ ; then
   cpu="aarch64"
 elif check_define __hppa__ ; then
   cpu="hppa"
+elif check_define __loongarch64 ; then
+  cpu="loongarch64"
 else
   cpu=`uname -m`
 fi
 
 # Normalise host CPU name and set ARCH.
 case "$cpu" in
-  ia64|ppc|ppc64|s390|s390x|sparc64)
+  ia64|ppc|ppc64|s390|s390x|sparc64|loongarch64)
     cpu="$cpu"
   ;;
   i386|i486|i586|i686|i86pc|BePC)
diff --git a/libfio.c b/libfio.c
index ddd49cd7..5e3fd30b 100644
--- a/libfio.c
+++ b/libfio.c
@@ -74,6 +74,7 @@ static const char *fio_arch_strings[arch_nr] = {
 	"hppa",
 	"mips",
 	"aarch64",
+	"loongarch64",
 	"generic"
 };
 
diff --git a/os/os-linux-syscall.h b/os/os-linux-syscall.h
index c399b2fa..67ee4d91 100644
--- a/os/os-linux-syscall.h
+++ b/os/os-linux-syscall.h
@@ -270,6 +270,22 @@
 #define __NR_ioprio_get		31
 #endif
 
+/* Linux syscalls for loongarch64 */
+#elif defined(ARCH_LOONGARCH64_H)
+#ifndef __NR_ioprio_set
+#define __NR_ioprio_set         30
+#define __NR_ioprio_get         31
+#endif
+
+#ifndef __NR_fadvise64
+#define __NR_fadvise64          223
+#endif
+
+#ifndef __NR_sys_splice
+#define __NR_sys_splice         76
+#define __NR_sys_tee          	77
+#define __NR_sys_vmsplice       75
+#endif
 #else
 #warning "Unknown architecture"
 #endif
-- 
2.25.1