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Message-Id: <20220817143458.335938-6-justin.he@arm.com>
Date: Wed, 17 Aug 2022 14:34:56 +0000
From: Jia He <justin.he@....com>
To: Ard Biesheuvel <ardb@...nel.org>, Len Brown <lenb@...nel.org>,
James Morse <james.morse@....com>,
Tony Luck <tony.luck@...el.com>,
Borislav Petkov <bp@...en8.de>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
Robert Richter <rric@...nel.org>,
Robert Moore <robert.moore@...el.com>,
Qiuxu Zhuo <qiuxu.zhuo@...el.com>,
Yazen Ghannam <yazen.ghannam@....com>
Cc: linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-edac@...r.kernel.org, devel@...ica.org,
"Rafael J . Wysocki" <rafael@...nel.org>,
Shuai Xue <xueshuai@...ux.alibaba.com>,
Jarkko Sakkinen <jarkko@...nel.org>, linux-efi@...r.kernel.org,
toshi.kani@....com, nd@....com, Jia He <justin.he@....com>
Subject: [PATCH v2 5/7] EDAC/ghes: Prevent chipset-specific edac from loading after ghes_edac is registered
Previous, there is only one edac can be registering in the EDAC core. After
ghes_edac is modularized, the registering of ghes devices may be deferred
when ghes_edac is loaded. Prevent the chipset-specific edac drivers from
loading after ghes_edac is registered, which allow the edac drivers to
get selected in e.g. HPE platform.
Signed-off-by: Jia He <justin.he@....com>
---
drivers/acpi/apei/ghes.c | 14 ++++++++++++++
drivers/edac/amd64_edac.c | 2 +-
drivers/edac/ghes_edac.c | 2 ++
drivers/edac/pnd2_edac.c | 2 +-
drivers/edac/sb_edac.c | 2 +-
drivers/edac/skx_base.c | 2 +-
include/acpi/ghes.h | 4 ++++
7 files changed, 24 insertions(+), 4 deletions(-)
diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
index 9c52183e3ad9..9272d963b57d 100644
--- a/drivers/acpi/apei/ghes.c
+++ b/drivers/acpi/apei/ghes.c
@@ -95,6 +95,7 @@
#endif
static ATOMIC_NOTIFIER_HEAD(ghes_report_chain);
+static bool devs_registered;
static inline bool is_hest_type_generic_v2(struct ghes *ghes)
{
@@ -1266,6 +1267,18 @@ static int apei_sdei_unregister_ghes(struct ghes *ghes)
return sdei_unregister_ghes(ghes);
}
+void set_ghes_devs_registered(bool flag)
+{
+ devs_registered = flag;
+}
+EXPORT_SYMBOL_GPL(set_ghes_devs_registered);
+
+bool ghes_devs_registered(void)
+{
+ return devs_registered;
+}
+EXPORT_SYMBOL_GPL(ghes_devs_registered);
+
static int ghes_probe(struct platform_device *ghes_dev)
{
struct acpi_hest_generic *generic;
@@ -1382,6 +1395,7 @@ static int ghes_probe(struct platform_device *ghes_dev)
platform_set_drvdata(ghes_dev, ghes);
ghes->dev = &ghes_dev->dev;
+ set_ghes_devs_registered(false);
mutex_lock(&ghes_devs_mutex);
list_add_tail(&ghes->elist, &ghes_devs);
diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c
index e4eaf6668feb..f48507fa7b94 100644
--- a/drivers/edac/amd64_edac.c
+++ b/drivers/edac/amd64_edac.c
@@ -4329,7 +4329,7 @@ static int __init amd64_edac_init(void)
int err = -ENODEV;
int i;
- if (ghes_get_devices(0))
+ if (ghes_get_devices(0) && ghes_devs_registered())
return -EBUSY;
owner = edac_get_owner();
diff --git a/drivers/edac/ghes_edac.c b/drivers/edac/ghes_edac.c
index 3bdf8469882d..d26644b3bc47 100644
--- a/drivers/edac/ghes_edac.c
+++ b/drivers/edac/ghes_edac.c
@@ -564,6 +564,7 @@ static int __init ghes_edac_init(void)
list_for_each_entry_safe(g, g_tmp, ghes_devs, elist) {
ghes_edac_register(g->dev);
}
+ set_ghes_devs_registered(true);
return 0;
}
@@ -576,6 +577,7 @@ static void __exit ghes_edac_exit(void)
list_for_each_entry_safe(g, g_tmp, ghes_devs, elist) {
ghes_edac_unregister(g);
}
+ set_ghes_devs_registered(false);
}
module_exit(ghes_edac_exit);
diff --git a/drivers/edac/pnd2_edac.c b/drivers/edac/pnd2_edac.c
index 73f2ba0e64e3..66d89d00c4b3 100644
--- a/drivers/edac/pnd2_edac.c
+++ b/drivers/edac/pnd2_edac.c
@@ -1528,7 +1528,7 @@ static int __init pnd2_init(void)
edac_dbg(2, "\n");
- if (ghes_get_devices(0))
+ if (ghes_get_devices(0) && ghes_devs_registered())
return -EBUSY;
owner = edac_get_owner();
diff --git a/drivers/edac/sb_edac.c b/drivers/edac/sb_edac.c
index 1d0520a16840..a3a89e366a74 100644
--- a/drivers/edac/sb_edac.c
+++ b/drivers/edac/sb_edac.c
@@ -3506,7 +3506,7 @@ static int __init sbridge_init(void)
edac_dbg(2, "\n");
- if (ghes_get_devices(0))
+ if (ghes_get_devices(0) && ghes_devs_registered())
return -EBUSY;
owner = edac_get_owner();
diff --git a/drivers/edac/skx_base.c b/drivers/edac/skx_base.c
index fe267f8543f5..efa1ae79c35a 100644
--- a/drivers/edac/skx_base.c
+++ b/drivers/edac/skx_base.c
@@ -653,7 +653,7 @@ static int __init skx_init(void)
edac_dbg(2, "\n");
- if (ghes_get_devices(0))
+ if (ghes_get_devices(0) && ghes_devs_registered())
return -EBUSY;
owner = edac_get_owner();
diff --git a/include/acpi/ghes.h b/include/acpi/ghes.h
index 150c0b9500d6..21b9d4d4c3e9 100644
--- a/include/acpi/ghes.h
+++ b/include/acpi/ghes.h
@@ -72,8 +72,12 @@ int ghes_register_vendor_record_notifier(struct notifier_block *nb);
*/
void ghes_unregister_vendor_record_notifier(struct notifier_block *nb);
struct list_head *ghes_get_devices(bool force);
+bool ghes_devs_registered(void);
+void set_ghes_devs_registered(bool flag);
#else
static inline struct list_head *ghes_get_devices(bool force) { return NULL; }
+static inline bool ghes_devs_registered(void) { return false; }
+static inline void set_ghes_devs_registered(bool flag) { return; }
#endif
int ghes_estatus_pool_init(int num_ghes);
--
2.25.1
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