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

Message ID cf8585177e6798095b1af02f28dad5a3271a761e.1584352425.git.zong.li@sifive.com (mailing list archive)
State New, archived
Headers show
Series Support KASLR for RISC-V | expand

Commit Message

Zong Li March 24, 2020, 7:30 a.m. UTC 
Add interface to get the random offset.

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

Comments

Alexandre Ghiti April 7, 2020, 5:08 a.m. UTC | #1 
On 3/24/20 3:30 AM, Zong Li wrote:
> Add interface to get the random offset.
> 
> Signed-off-by: Zong Li <zong.li@sifive.com>
> ---
>   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)
>   
> 

No problem for this one:

Reviewed-by: Alexandre Ghiti <alex@ghiti.fr>

Thanks,

Alex
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Patch

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)