linux-kernel - [PATCH] firmware: arm_sdei: Add EVENT

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Message-ID: <20250509064552.3330202-1-quic_hyiwei@quicinc.com>
Date: Fri, 9 May 2025 14:45:52 +0800
From: Huang Yiwei <quic_hyiwei@...cinc.com>
To: <james.morse@....com>, <linux-arm-kernel@...ts.infradead.org>
CC: Huang Yiwei <quic_hyiwei@...cinc.com>, <linux-kernel@...r.kernel.org>,
        <quic_aiquny@...cinc.com>, <kernel@...cinc.com>,
        <kernel@....qualcomm.com>
Subject: [PATCH] firmware: arm_sdei: Add EVENT_SIGNAL for ARM SDEI

SDEI_EVENT_SIGNAL is a standard interface for SDEI feature and useful
for customized firmware calls. Therefore, adding this missing interface
to SDEI driver.

Signed-off-by: Huang Yiwei <quic_hyiwei@...cinc.com>
---
 drivers/firmware/arm_sdei.c   | 6 ++++++
 include/linux/arm_sdei.h      | 1 +
 include/uapi/linux/arm_sdei.h | 1 +
 3 files changed, 8 insertions(+)

diff --git a/drivers/firmware/arm_sdei.c b/drivers/firmware/arm_sdei.c
index 3e8051fe8296..3140bb505f06 100644
--- a/drivers/firmware/arm_sdei.c
+++ b/drivers/firmware/arm_sdei.c
@@ -299,6 +299,12 @@ static int sdei_api_get_version(u64 *version)
 	return invoke_sdei_fn(SDEI_1_0_FN_SDEI_VERSION, 0, 0, 0, 0, 0, version);
 }
 
+int sdei_event_signal(u32 event_num)
+{
+	return invoke_sdei_fn(SDEI_1_0_FN_SDEI_EVENT_SIGNAL, event_num, 0, 0, 0,
+			      0, NULL);
+}
+
 int sdei_mask_local_cpu(void)
 {
 	int err;
diff --git a/include/linux/arm_sdei.h b/include/linux/arm_sdei.h
index 255701e1251b..3c0862a03d09 100644
--- a/include/linux/arm_sdei.h
+++ b/include/linux/arm_sdei.h
@@ -36,6 +36,7 @@ int sdei_event_unregister(u32 event_num);
 
 int sdei_event_enable(u32 event_num);
 int sdei_event_disable(u32 event_num);
+int sdei_event_signal(u32 event_num);
 
 /* GHES register/unregister helpers */
 int sdei_register_ghes(struct ghes *ghes, sdei_event_callback *normal_cb,
diff --git a/include/uapi/linux/arm_sdei.h b/include/uapi/linux/arm_sdei.h
index af0630ba5437..247b5d035864 100644
--- a/include/uapi/linux/arm_sdei.h
+++ b/include/uapi/linux/arm_sdei.h
@@ -17,6 +17,7 @@
 #define SDEI_1_0_FN_SDEI_EVENT_UNREGISTER		SDEI_1_0_FN(0x07)
 #define SDEI_1_0_FN_SDEI_EVENT_STATUS			SDEI_1_0_FN(0x08)
 #define SDEI_1_0_FN_SDEI_EVENT_GET_INFO			SDEI_1_0_FN(0x09)
+#define SDEI_1_0_FN_SDEI_EVENT_SIGNAL			SDEI_1_0_FN(0x0F)
 #define SDEI_1_0_FN_SDEI_EVENT_ROUTING_SET		SDEI_1_0_FN(0x0A)
 #define SDEI_1_0_FN_SDEI_PE_MASK			SDEI_1_0_FN(0x0B)
 #define SDEI_1_0_FN_SDEI_PE_UNMASK			SDEI_1_0_FN(0x0C)
-- 
2.25.1