Re: [PATCH v4 06/29] arm64: context switch POR_EL0 register
From: Kevin Brodsky <hidden>
Date: 2024-07-22 13:40:39
Also in:
kvmarm, linux-arm-kernel, linux-fsdevel, linux-mm
On 03/05/2024 15:01, Joey Gouly wrote:
quoted hunk ↗ jump to hunk
@@ -371,6 +382,9 @@ int copy_thread(struct task_struct *p, const struct kernel_clone_args *args) if (system_supports_tpidr2()) p->thread.tpidr2_el0 = read_sysreg_s(SYS_TPIDR2_EL0); + if (system_supports_poe()) + p->thread.por_el0 = read_sysreg_s(SYS_POR_EL0);
This is most likely needed for kernel threads as well, because they may be affected by POR_EL0 too (see my reply on patch 17). Kevin
quoted hunk ↗ jump to hunk
+ if (stack_start) { if (is_compat_thread(task_thread_info(p))) childregs->compat_sp = stack_start;