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Message-Id: <20220227122546.43307-1-xueshuai@linux.alibaba.com>
Date: Sun, 27 Feb 2022 20:25:45 +0800
From: Shuai Xue <xueshuai@...ux.alibaba.com>
To: helgaas@...nel.org, rafael@...nel.org, nathan@...nel.org
Cc: bp@...en8.de, tony.luck@...el.com, james.morse@....com,
lenb@...nel.org, rjw@...ysocki.net, bhelgaas@...gle.com,
xueshuai@...ux.alibaba.com, zhangliguang@...ux.alibaba.com,
zhuo.song@...ux.alibaba.com, linux-kernel@...r.kernel.org,
linux-acpi@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-pci@...r.kernel.org
Subject: [PATCH v8 1/2] ACPI: APEI: explicit init HEST and GHES in apci_init
>From commit e147133a42cb ("ACPI / APEI: Make hest.c manage the estatus
memory pool") was merged, ghes_init() relies on acpi_hest_init() to manage
the estatus memory pool. On the other hand, ghes_init() relies on
sdei_init() to detect the SDEI version and (un)register events. The
dependencies are as follows:
ghes_init() => acpi_hest_init() => acpi_bus_init() => acpi_init()
ghes_init() => sdei_init()
HEST is not PCI-specific and initcall ordering is implicit and not
well-defined within a level.
Based on above, remove acpi_hest_init() from acpi_pci_root_init() and
convert ghes_init() and sdei_init() from initcalls to explicit calls in the
following order:
acpi_hest_init()
ghes_init()
sdei_init()
Signed-off-by: Shuai Xue <xueshuai@...ux.alibaba.com>
---
drivers/acpi/apei/ghes.c | 19 ++++++++-----------
drivers/acpi/bus.c | 2 ++
drivers/acpi/pci_root.c | 3 ---
drivers/firmware/Kconfig | 1 +
drivers/firmware/arm_sdei.c | 13 ++-----------
include/acpi/apei.h | 4 +++-
include/linux/arm_sdei.h | 2 ++
7 files changed, 18 insertions(+), 26 deletions(-)
diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
index 0c5c9acc6254..aadc0a972f18 100644
--- a/drivers/acpi/apei/ghes.c
+++ b/drivers/acpi/apei/ghes.c
@@ -1457,33 +1457,35 @@ static struct platform_driver ghes_platform_driver = {
.remove = ghes_remove,
};
-static int __init ghes_init(void)
+void __init ghes_init(void)
{
int rc;
+ sdei_init();
+
if (acpi_disabled)
- return -ENODEV;
+ return;
switch (hest_disable) {
case HEST_NOT_FOUND:
- return -ENODEV;
+ return;
case HEST_DISABLED:
pr_info(GHES_PFX "HEST is not enabled!\n");
- return -EINVAL;
+ return;
default:
break;
}
if (ghes_disable) {
pr_info(GHES_PFX "GHES is not enabled!\n");
- return -EINVAL;
+ return;
}
ghes_nmi_init_cxt();
rc = platform_driver_register(&ghes_platform_driver);
if (rc)
- goto err;
+ return;
rc = apei_osc_setup();
if (rc == 0 && osc_sb_apei_support_acked)
@@ -1494,9 +1496,4 @@ static int __init ghes_init(void)
pr_info(GHES_PFX "APEI firmware first mode is enabled by APEI bit.\n");
else
pr_info(GHES_PFX "Failed to enable APEI firmware first mode.\n");
-
- return 0;
-err:
- return rc;
}
-device_initcall(ghes_init);
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 07f604832fd6..3f403db20f69 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -1331,6 +1331,8 @@ static int __init acpi_init(void)
pci_mmcfg_late_init();
acpi_iort_init();
+ acpi_hest_init();
+ ghes_init();
acpi_scan_init();
acpi_ec_init();
acpi_debugfs_init();
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index b76db99cced3..6f9e75d14808 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -22,8 +22,6 @@
#include <linux/slab.h>
#include <linux/dmi.h>
#include <linux/platform_data/x86/apple.h>
-#include <acpi/apei.h> /* for acpi_hest_init() */
-
#include "internal.h"
#define ACPI_PCI_ROOT_CLASS "pci_bridge"
@@ -943,7 +941,6 @@ struct pci_bus *acpi_pci_root_create(struct acpi_pci_root *root,
void __init acpi_pci_root_init(void)
{
- acpi_hest_init();
if (acpi_pci_disabled)
return;
diff --git a/drivers/firmware/Kconfig b/drivers/firmware/Kconfig
index 75cb91055c17..e5cfb01353d8 100644
--- a/drivers/firmware/Kconfig
+++ b/drivers/firmware/Kconfig
@@ -40,6 +40,7 @@ config ARM_SCPI_POWER_DOMAIN
config ARM_SDE_INTERFACE
bool "ARM Software Delegated Exception Interface (SDEI)"
depends on ARM64
+ depends on ACPI_APEI_GHES
help
The Software Delegated Exception Interface (SDEI) is an ARM
standard for registering callbacks from the platform firmware
diff --git a/drivers/firmware/arm_sdei.c b/drivers/firmware/arm_sdei.c
index a7e762c352f9..1e1a51510e83 100644
--- a/drivers/firmware/arm_sdei.c
+++ b/drivers/firmware/arm_sdei.c
@@ -1059,14 +1059,14 @@ static bool __init sdei_present_acpi(void)
return true;
}
-static int __init sdei_init(void)
+void __init sdei_init(void)
{
struct platform_device *pdev;
int ret;
ret = platform_driver_register(&sdei_driver);
if (ret || !sdei_present_acpi())
- return ret;
+ return;
pdev = platform_device_register_simple(sdei_driver.driver.name,
0, NULL, 0);
@@ -1076,17 +1076,8 @@ static int __init sdei_init(void)
pr_info("Failed to register ACPI:SDEI platform device %d\n",
ret);
}
-
- return ret;
}
-/*
- * On an ACPI system SDEI needs to be ready before HEST:GHES tries to register
- * its events. ACPI is initialised from a subsys_initcall(), GHES is initialised
- * by device_initcall(). We want to be called in the middle.
- */
-subsys_initcall_sync(sdei_init);
-
int sdei_event_handler(struct pt_regs *regs,
struct sdei_registered_event *arg)
{
diff --git a/include/acpi/apei.h b/include/acpi/apei.h
index ece0a8af2bae..4e60dd73c3bb 100644
--- a/include/acpi/apei.h
+++ b/include/acpi/apei.h
@@ -27,14 +27,16 @@ extern int hest_disable;
extern int erst_disable;
#ifdef CONFIG_ACPI_APEI_GHES
extern bool ghes_disable;
+void __init ghes_init(void);
#else
#define ghes_disable 1
+static inline void ghes_init(void) { }
#endif
#ifdef CONFIG_ACPI_APEI
void __init acpi_hest_init(void);
#else
-static inline void acpi_hest_init(void) { return; }
+static inline void acpi_hest_init(void) { }
#endif
int erst_write(const struct cper_record_header *record);
diff --git a/include/linux/arm_sdei.h b/include/linux/arm_sdei.h
index 0a241c5c911d..14dc461b0e82 100644
--- a/include/linux/arm_sdei.h
+++ b/include/linux/arm_sdei.h
@@ -46,9 +46,11 @@ int sdei_unregister_ghes(struct ghes *ghes);
/* For use by arch code when CPU hotplug notifiers are not appropriate. */
int sdei_mask_local_cpu(void);
int sdei_unmask_local_cpu(void);
+void __init sdei_init(void);
#else
static inline int sdei_mask_local_cpu(void) { return 0; }
static inline int sdei_unmask_local_cpu(void) { return 0; }
+static inline void sdei_init(void) { }
#endif /* CONFIG_ARM_SDE_INTERFACE */
--
2.20.1.12.g72788fdb
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