From 62ea18c632200edbbf46b4e957bc4d997f1c66f0 Mon Sep 17 00:00:00 2001
From: Lulu Cheng <chenglulu@loongson.cn>
Date: Tue, 27 Sep 2022 15:28:43 +0800
Subject: [PATCH 024/124] Libvtv: Add loongarch support.

The loongarch64 specification permits page sizes of 4KiB, 16KiB and 64KiB,
but only 16KiB pages are supported for now.

Co-Authored-By: qijingwen <qijingwen@loongson.cn>

include/ChangeLog:

	* vtv-change-permission.h (defined): Determines whether the macro
	__loongarch_lp64 is defined
	(VTV_PAGE_SIZE): Set VTV_PAGE_SIZE to 16KiB for loongarch64.

libvtv/ChangeLog:

	* configure.tgt: Add loongarch support.

Signed-off-by: Peng Fan <fanpeng@loongson.cn>
Signed-off-by: ticat_fp <fanpeng@loongson.cn>
---
 include/vtv-change-permission.h | 4 ++++
 libvtv/configure.tgt            | 3 +++
 2 files changed, 7 insertions(+)

diff --git a/include/vtv-change-permission.h b/include/vtv-change-permission.h
index 70bdad92b..e7b9294a0 100644
--- a/include/vtv-change-permission.h
+++ b/include/vtv-change-permission.h
@@ -48,6 +48,10 @@ extern void __VLTChangePermission (int);
 #else 
 #if defined(__sun__) && defined(__svr4__) && defined(__sparc__)
 #define VTV_PAGE_SIZE 8192
+#elif defined(__loongarch_lp64)
+/* The page size is configurable by the kernel to be 4, 16 or 64 KiB.
+   For now, only the default page size of 16KiB is supported.  */
+#define VTV_PAGE_SIZE 16384
 #else
 #define VTV_PAGE_SIZE 4096
 #endif
diff --git a/libvtv/configure.tgt b/libvtv/configure.tgt
index aa2a3f675..6cdd1e97a 100644
--- a/libvtv/configure.tgt
+++ b/libvtv/configure.tgt
@@ -50,6 +50,9 @@ case "${target}" in
 	;;
   x86_64-*-darwin[1]* | i?86-*-darwin[1]*)
 	;;
+  loongarch*-*-linux*)
+	VTV_SUPPORTED=yes
+	;;
   *)
 	;;
 esac
-- 
2.33.0