4 Oct
2023
4 Oct
'23
4:49 p.m.
On Wed, Sep 27, 2023 at 03:01:08PM +0100, Joey Gouly wrote:
+static void permission_overlay_switch(struct task_struct *next) +{
- if (alternative_has_cap_unlikely(ARM64_HAS_S1POE)) {
current->thread.por_el0 = read_sysreg_s(SYS_POR_EL0);write_sysreg_s(next->thread.por_el0, SYS_POR_EL0);- }
+}
Does this need an ISB or is the POR_EL0 register write self-synchronising?
--
Catalin