linux-kernel - [PATCH v4 06/17] ras: AEST: Support RAS Common Fault Injection Model Extension

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Message-Id: <20251222094351.38792-7-tianruidong@linux.alibaba.com>
Date: Mon, 22 Dec 2025 17:43:39 +0800
From: Ruidong Tian <tianruidong@...ux.alibaba.com>
To: catalin.marinas@....com,
	will@...nel.org,
	lpieralisi@...nel.org,
	guohanjun@...wei.com,
	sudeep.holla@....com,
	xueshuai@...ux.alibaba.com,
	linux-kernel@...r.kernel.org,
	linux-acpi@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	rafael@...nel.org,
	lenb@...nel.org,
	tony.luck@...el.com,
	bp@...en8.de,
	yazen.ghannam@....com,
	misono.tomohiro@...itsu.com
Cc: tianruidong@...ux.alibaba.com
Subject: [PATCH v4 06/17] ras: AEST: Support RAS Common Fault Injection Model Extension

Add inject register descripted in Common Fault Injection Model
Extension.

Signed-off-by: Ruidong Tian <tianruidong@...ux.alibaba.com>
---
 drivers/ras/aest/aest-core.c | 15 ++++++++++++++-
 drivers/ras/aest/aest.h      | 10 ++++++++++
 2 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/drivers/ras/aest/aest-core.c b/drivers/ras/aest/aest-core.c
index 84b2fb8127ff..1218ae51079c 100644
--- a/drivers/ras/aest/aest-core.c
+++ b/drivers/ras/aest/aest-core.c
@@ -124,7 +124,7 @@ static int aest_init_node(struct aest_device *adev, struct aest_node *node,
 			  struct acpi_aest_node *anode)
 {
 	int i, ret;
-	u64 address;
+	u64 address, flags;
 
 	node->adev = adev;
 	node->info = anode;
@@ -145,6 +145,19 @@ static int aest_init_node(struct aest_device *adev, struct aest_node *node,
 			return -ENOMEM;
 	}
 
+	flags = anode->interface_hdr->flags;
+	address = node->info->common->fault_inject_register_base;
+	if ((flags & AEST_XFACE_FLAG_FAULT_INJECT) && address) {
+		if (address - anode->interface_hdr->address < node->group->size)
+			node->inj = node->base +
+				    (address - anode->interface_hdr->address);
+		else {
+			node->inj = devm_ioremap(adev->dev, address, PAGE_SIZE);
+			if (!node->inj)
+				return -ENOMEM;
+		}
+	}
+
 	ret = aest_node_set_errgsr(adev, node);
 	if (ret)
 		return ret;
diff --git a/drivers/ras/aest/aest.h b/drivers/ras/aest/aest.h
index bf0b9a49fdaa..505ecd9635bc 100644
--- a/drivers/ras/aest/aest.h
+++ b/drivers/ras/aest/aest.h
@@ -60,6 +60,9 @@
 #define ERXMISC1 0x28
 #define ERXMISC2 0x30
 #define ERXMISC3 0x38
+#define ERXPFGF 0x800
+#define ERXPFGCTL 0x808
+#define ERXPFGCDN 0x810
 
 #define GIC_ERRDEVARCH 0xFFBC
 
@@ -120,6 +123,7 @@ struct aest_node {
 	u8 type;
 	void *errgsr;
 	void *base;
+	void *inj;
 
 	/*
 	 * This bitmap indicates which of the error records within this error
@@ -208,6 +212,9 @@ static inline u64 aest_sysreg_read(void *__unused, u32 offset)
 		CASE_READ(res, ERXMISC1)
 		CASE_READ(res, ERXMISC2)
 		CASE_READ(res, ERXMISC3)
+		CASE_READ(res, ERXPFGF)
+		CASE_READ(res, ERXPFGCTL)
+		CASE_READ(res, ERXPFGCDN)
 	default :
 		res = 0;
 	}
@@ -225,6 +232,9 @@ static inline void aest_sysreg_write(void *base, u32 offset, u64 val)
 		CASE_WRITE(val, ERXMISC1)
 		CASE_WRITE(val, ERXMISC2)
 		CASE_WRITE(val, ERXMISC3)
+		CASE_WRITE(val, ERXPFGF)
+		CASE_WRITE(val, ERXPFGCTL)
+		CASE_WRITE(val, ERXPFGCDN)
 	default :
 		return;
 	}
-- 
2.51.2.612.gdc70283dfc