On 3/22/2021 2:13 AM, Kirill A. Shutemov wrote:
On Tue, Mar 16, 2021 at 08:10:33AM -0700, Yu-cheng Yu wrote:
The x86 family of processors do not directly create read-only and Dirty
PTEs. These PTEs are created by software. One such case is that kernel
read-only pages are historically setup as Dirty.
New processors that support Shadow Stack regard read-only and Dirty PTEs as
shadow stack pages. This results in ambiguity between shadow stack and
kernel read-only pages. To resolve this, removed Dirty from kernel read-
only pages.
Signed-off-by: Yu-cheng Yu <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: Kees Cook <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Looks good to me.
Reviewed-by: Kirill A. Shutemov <[email protected]>
Thanks for reviewing.
Yu-cheng
