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-rw-r--r--drivers/firmware/arm_sdei.c68
-rw-r--r--drivers/firmware/efi/cper.c13
2 files changed, 77 insertions, 4 deletions
diff --git a/drivers/firmware/arm_sdei.c b/drivers/firmware/arm_sdei.c
index c64c7da73829..e6376f985ef7 100644
--- a/drivers/firmware/arm_sdei.c
+++ b/drivers/firmware/arm_sdei.c
@@ -2,6 +2,7 @@
// Copyright (C) 2017 Arm Ltd.
#define pr_fmt(fmt) "sdei: " fmt
+#include <acpi/ghes.h>
#include <linux/acpi.h>
#include <linux/arm_sdei.h>
#include <linux/arm-smccc.h>
@@ -887,6 +888,73 @@ static void sdei_smccc_hvc(unsigned long function_id,
arm_smccc_hvc(function_id, arg0, arg1, arg2, arg3, arg4, 0, 0, res);
}
+int sdei_register_ghes(struct ghes *ghes, sdei_event_callback *normal_cb,
+ sdei_event_callback *critical_cb)
+{
+ int err;
+ u64 result;
+ u32 event_num;
+ sdei_event_callback *cb;
+
+ if (!IS_ENABLED(CONFIG_ACPI_APEI_GHES))
+ return -EOPNOTSUPP;
+
+ event_num = ghes->generic->notify.vector;
+ if (event_num == 0) {
+ /*
+ * Event 0 is reserved by the specification for
+ * SDEI_EVENT_SIGNAL.
+ */
+ return -EINVAL;
+ }
+
+ err = sdei_api_event_get_info(event_num, SDEI_EVENT_INFO_EV_PRIORITY,
+ &result);
+ if (err)
+ return err;
+
+ if (result == SDEI_EVENT_PRIORITY_CRITICAL)
+ cb = critical_cb;
+ else
+ cb = normal_cb;
+
+ err = sdei_event_register(event_num, cb, ghes);
+ if (!err)
+ err = sdei_event_enable(event_num);
+
+ return err;
+}
+
+int sdei_unregister_ghes(struct ghes *ghes)
+{
+ int i;
+ int err;
+ u32 event_num = ghes->generic->notify.vector;
+
+ might_sleep();
+
+ if (!IS_ENABLED(CONFIG_ACPI_APEI_GHES))
+ return -EOPNOTSUPP;
+
+ /*
+ * The event may be running on another CPU. Disable it
+ * to stop new events, then try to unregister a few times.
+ */
+ err = sdei_event_disable(event_num);
+ if (err)
+ return err;
+
+ for (i = 0; i < 3; i++) {
+ err = sdei_event_unregister(event_num);
+ if (err != -EINPROGRESS)
+ break;
+
+ schedule();
+ }
+
+ return err;
+}
+
static int sdei_get_conduit(struct platform_device *pdev)
{
const char *method;
diff --git a/drivers/firmware/efi/cper.c b/drivers/firmware/efi/cper.c
index a7902fccdcfa..6090d25dce85 100644
--- a/drivers/firmware/efi/cper.c
+++ b/drivers/firmware/efi/cper.c
@@ -546,19 +546,24 @@ EXPORT_SYMBOL_GPL(cper_estatus_check_header);
int cper_estatus_check(const struct acpi_hest_generic_status *estatus)
{
struct acpi_hest_generic_data *gdata;
- unsigned int data_len, gedata_len;
+ unsigned int data_len, record_size;
int rc;
rc = cper_estatus_check_header(estatus);
if (rc)
return rc;
+
data_len = estatus->data_length;
apei_estatus_for_each_section(estatus, gdata) {
- gedata_len = acpi_hest_get_error_length(gdata);
- if (gedata_len > data_len - acpi_hest_get_size(gdata))
+ if (sizeof(struct acpi_hest_generic_data) > data_len)
+ return -EINVAL;
+
+ record_size = acpi_hest_get_record_size(gdata);
+ if (record_size > data_len)
return -EINVAL;
- data_len -= acpi_hest_get_record_size(gdata);
+
+ data_len -= record_size;
}
if (data_len)
return -EINVAL;