UPSTREAM: arm64: mm: Fix and re-enable ARM64_SW_TTBR0_PAN
With the ASID now installed in TTBR1, we can re-enable ARM64_SW_TTBR0_PAN by ensuring that we switch to a reserved ASID of zero when disabling user access and restore the active user ASID on the uaccess enable path. Reviewed-by:Mark Rutland <mark.rutland@arm.com> Tested-by:
Laura Abbott <labbott@redhat.com> Tested-by:
Shanker Donthineni <shankerd@codeaurora.org> Signed-off-by:
Will Deacon <will.deacon@arm.com> (cherry picked from commit 27a921e75711d924617269e0ba4adb8bae9fd0d1) [toddpoynor@google.com: fixup context, move asm-uaccess.h changes to uaccess.h] Change-Id: Ie8e1706152b8d7c068c6b1f20241a10669a69ca1 Signed-off-by:
Todd Poynor <toddpoynor@google.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@google.com>
Loading
Please register or sign in to comment