4 files changed, 55 insertions, 23 deletions
diff --git a/arch/loongarch/include/asm/vdso/getrandom.h b/arch/loongarch/include/asm/vdso/getrandom.h
new file mode 100644
index 000000000000..e80f3c4ac748
--- /dev/null
+++ b/arch/loongarch/include/asm/vdso/getrandom.h
@@ -0,0 +1,38 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2024 Xi Ruoyao <xry111@xry111.site>. All Rights Reserved.
+ */
+#ifndef __ASM_VDSO_GETRANDOM_H
+#define __ASM_VDSO_GETRANDOM_H
+
+#ifndef __ASSEMBLY__
+
+#include <asm/unistd.h>
+#include <asm/vdso/vdso.h>
+
+static __always_inline ssize_t getrandom_syscall(void *_buffer, size_t _len, unsigned int _flags)
+{
+	register long ret asm("a0");
+	register long nr asm("a7") = __NR_getrandom;
+	register void *buffer asm("a0") = _buffer;
+	register size_t len asm("a1") = _len;
+	register unsigned int flags asm("a2") = _flags;
+
+	asm volatile(
+	"      syscall 0\n"
+	: "+r" (ret)
+	: "r" (nr), "r" (buffer), "r" (len), "r" (flags)
+	: "$t0", "$t1", "$t2", "$t3", "$t4", "$t5", "$t6", "$t7", "$t8",
+	  "memory");
+
+	return ret;
+}
+
+static __always_inline const struct vdso_rng_data *__arch_get_vdso_rng_data(void)
+{
+	return &_loongarch_data.rng_data;
+}
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* __ASM_VDSO_GETRANDOM_H */
diff --git a/arch/loongarch/include/asm/vdso/gettimeofday.h b/arch/loongarch/include/asm/vdso/gettimeofday.h
index 89e6b222c2f2..7eb3f041af76 100644
--- a/arch/loongarch/include/asm/vdso/gettimeofday.h
+++ b/arch/loongarch/include/asm/vdso/gettimeofday.h
@@ -91,14 +91,14 @@ static inline bool loongarch_vdso_hres_capable(void)
 
 static __always_inline const struct vdso_data *__arch_get_vdso_data(void)
 {
-	return (const struct vdso_data *)get_vdso_data();
+	return _vdso_data;
 }
 
 #ifdef CONFIG_TIME_NS
 static __always_inline
 const struct vdso_data *__arch_get_timens_vdso_data(const struct vdso_data *vd)
 {
-	return (const struct vdso_data *)(get_vdso_data() + VVAR_TIMENS_PAGE_OFFSET * PAGE_SIZE);
+	return _timens_data;
 }
 #endif
 #endif /* !__ASSEMBLY__ */
diff --git a/arch/loongarch/include/asm/vdso/vdso.h b/arch/loongarch/include/asm/vdso/vdso.h
index 5a12309d9fb5..1c183a9b2115 100644
--- a/arch/loongarch/include/asm/vdso/vdso.h
+++ b/arch/loongarch/include/asm/vdso/vdso.h
@@ -4,6 +4,9 @@
  * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
  */
 
+#ifndef _ASM_VDSO_VDSO_H
+#define _ASM_VDSO_VDSO_H
+
 #ifndef __ASSEMBLY__
 
 #include <asm/asm.h>
@@ -16,6 +19,7 @@ struct vdso_pcpu_data {
 
 struct loongarch_vdso_data {
 	struct vdso_pcpu_data pdata[NR_CPUS];
+	struct vdso_rng_data rng_data;
 };
 
 /*
@@ -44,22 +48,8 @@ enum vvar_pages {
 
 #define VVAR_SIZE (VVAR_NR_PAGES << PAGE_SHIFT)
 
-static inline unsigned long get_vdso_base(void)
-{
-	unsigned long addr;
-
-	__asm__(
-	" la.pcrel %0, _start\n"
-	: "=r" (addr)
-	:
-	:);
-
-	return addr;
-}
-
-static inline unsigned long get_vdso_data(void)
-{
-	return get_vdso_base() - VVAR_SIZE;
-}
+extern struct loongarch_vdso_data _loongarch_data __attribute__((visibility("hidden")));
 
 #endif /* __ASSEMBLY__ */
+
+#endif
diff --git a/arch/loongarch/include/asm/vdso/vsyscall.h b/arch/loongarch/include/asm/vdso/vsyscall.h
index 5de615383a22..8987e951d0a9 100644
--- a/arch/loongarch/include/asm/vdso/vsyscall.h
+++ b/arch/loongarch/include/asm/vdso/vsyscall.h
@@ -4,14 +4,11 @@
 
 #ifndef __ASSEMBLY__
 
-#include <linux/timekeeper_internal.h>
 #include <vdso/datapage.h>
 
 extern struct vdso_data *vdso_data;
+extern struct vdso_rng_data *vdso_rng_data;
 
-/*
- * Update the vDSO data page to keep in sync with kernel timekeeping.
- */
 static __always_inline
 struct vdso_data *__loongarch_get_k_vdso_data(void)
 {
@@ -19,6 +16,13 @@ struct vdso_data *__loongarch_get_k_vdso_data(void)
 }
 #define __arch_get_k_vdso_data __loongarch_get_k_vdso_data
 
+static __always_inline
+struct vdso_rng_data *__loongarch_get_k_vdso_rng_data(void)
+{
+	return vdso_rng_data;
+}
+#define __arch_get_k_vdso_rng_data __loongarch_get_k_vdso_rng_data
+
 /* The asm-generic header needs to be included after the definitions above */
 #include <asm-generic/vdso/vsyscall.h>