linux-kernel - [PATCH] ACPI: SPCR: Add support for DBG2 RISC-V SBI port subtype

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <20250910094136.4423-1-cp0613@linux.alibaba.com>
Date: Wed, 10 Sep 2025 17:41:36 +0800
From: cp0613@...ux.alibaba.com
To: rafael@...nel.org,
	lenb@...nel.org,
	guoren@...nel.org,
	jeeheng.sia@...rfivetech.com
Cc: linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Chen Pei <cp0613@...ux.alibaba.com>
Subject: [PATCH] ACPI: SPCR: Add support for DBG2 RISC-V SBI port subtype

From: Chen Pei <cp0613@...ux.alibaba.com>

The commit 4aca2bef90bd1296 ("ACPICA: Headers: Add RISC-V SBI Subtype
to DBG2") has added the definition of ACPI_DBG2_RISCV_SBI_CON.

This patch continues to implement its function so that the parameters
of uart can be configured correctly. Subsequent calls to setup_earlycon
to reuse the earlycon based on sbi.

Signed-off-by: Chen Pei <cp0613@...ux.alibaba.com>
---
 drivers/acpi/spcr.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/acpi/spcr.c b/drivers/acpi/spcr.c
index cd36a97b0ea2..208d6bbc65e0 100644
--- a/drivers/acpi/spcr.c
+++ b/drivers/acpi/spcr.c
@@ -141,6 +141,9 @@ int __init acpi_parse_spcr(bool enable_earlycon, bool enable_console)
 	case ACPI_DBG2_16550_NVIDIA:
 		uart = "uart";
 		break;
+	case ACPI_DBG2_RISCV_SBI_CON:
+		uart = "sbi";
+		break;
 	default:
 		err = -ENOENT;
 		goto done;
-- 
2.49.0