[PATCH RFC 1/8] riscv/kaslr: add interface to get kaslr offset

[Zong Li]

Add interface to get the random offset.

Signed-off-by: Zong Li <zong.li@xxxxxxxxxx>
---
 arch/riscv/include/asm/page.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/riscv/include/asm/page.h b/arch/riscv/include/asm/page.h
index 92848e172a40..e2c2020f0a8d 100644
--- a/arch/riscv/include/asm/page.h
+++ b/arch/riscv/include/asm/page.h
@@ -101,6 +101,11 @@ extern unsigned long kernel_virt_addr;
 extern unsigned long max_low_pfn;
 extern unsigned long min_low_pfn;
 
+static inline unsigned long get_kaslr_offset(void)
+{
+	return kernel_virt_addr - PAGE_OFFSET;
+}
+
 #define __pa_to_va_nodebug(x)	((void *)((unsigned long) (x) + va_pa_offset))
 #define __va_to_pa_nodebug(x)	((unsigned long)(x) - va_pa_offset)
 
-- 
2.25.1