Re: [PATCH v4 18/29] arm64: add POE signal support
From: Kevin Brodsky <hidden>
Date: 2024-07-09 13:08:16
Also in:
kvmarm, linux-arm-kernel, linux-fsdevel, linux-mm
On 03/05/2024 15:01, Joey Gouly wrote:
quoted hunk ↗ jump to hunk
@@ -1020,6 +1060,15 @@ static int setup_sigframe(struct rt_sigframe_user_layout *user, __put_user_error(current->thread.fault_code, &esr_ctx->esr, err); } + if (system_supports_poe() && err == 0 && user->poe_offset) { + struct poe_context __user *poe_ctx = + apply_user_offset(user, user->poe_offset); + + __put_user_error(POE_MAGIC, &poe_ctx->head.magic, err); + __put_user_error(sizeof(*poe_ctx), &poe_ctx->head.size, err); + __put_user_error(read_sysreg_s(SYS_POR_EL0), &poe_ctx->por_el0, err);
Nit: would be nicer to have this in its own helper (preserve_poe_context()), like for the other optional records. Kevin