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Message-Id: <20240521211036.227674-8-zaidal@os.amperecomputing.com>
Date: Tue, 21 May 2024 14:10:35 -0700
From: Zaid Alali <zaidal@...amperecomputing.com>
To: rafael@...nel.org,
lenb@...nel.org,
james.morse@....com,
tony.luck@...el.com,
bp@...en8.de,
robert.moore@...el.com,
Jonathan.Cameron@...wei.com,
Benjamin.Cheatham@....com,
dan.j.williams@...el.com,
arnd@...db.de,
Avadhut.Naik@....com,
u.kleine-koenig@...gutronix.de,
john.allen@....com,
linux-acpi@...r.kernel.org,
linux-kernel@...r.kernel.org,
acpica-devel@...ts.linux.dev
Subject: [RFC PATCH v2 7/8] ACPI: APEI: EINJ: Enable EINJv2 error injections
Enable the driver to inject EINJv2 type errors. The component
array values are parsed from user_input and expected to contain
hex values for component id and syndrome separated by space,
and multiple components are separated by new line as follows:
component_id1 component_syndrome1
component_id2 component_syndrome2
:
component_id(n) component_syndrome(n)
for example:
$comp_arr="0x1 0x2
>0x1 0x4
>0x2 0x4"
$cd /sys/kernel/debug/apei/einj/
$echo "$comp_arr" > einjv2_component_array
Signed-off-by: Zaid Alali <zaidal@...amperecomputing.com>
---
drivers/acpi/apei/einj-core.c | 81 ++++++++++++++++++++++++++++++++---
1 file changed, 75 insertions(+), 6 deletions(-)
diff --git a/drivers/acpi/apei/einj-core.c b/drivers/acpi/apei/einj-core.c
index 2e30ebed079b..2e5c00b34a4b 100644
--- a/drivers/acpi/apei/einj-core.c
+++ b/drivers/acpi/apei/einj-core.c
@@ -87,6 +87,13 @@ enum {
SETWA_FLAGS_APICID = 1,
SETWA_FLAGS_MEM = 2,
SETWA_FLAGS_PCIE_SBDF = 4,
+ SETWA_FLAGS_EINJV2 = 8,
+};
+
+enum {
+ EINJV2_PROCESSOR_ERROR = 0x1,
+ EINJV2_MEMORY_ERROR = 0x2,
+ EINJV2_PCIE_ERROR = 0x4,
};
/*
@@ -111,6 +118,7 @@ static char vendor_dev[64];
static struct debugfs_blob_wrapper einjv2_component_arr;
static u64 component_count;
static void *user_input;
+static int nr_components;
static u32 available_error_type;
static u32 available_error_type_v2;
@@ -287,8 +295,18 @@ static void *einj_get_parameter_address(void)
v5param = acpi_os_map_iomem(pa_v5, sizeof(*v5param));
if (v5param) {
+ int offset, len;
+
acpi5 = 1;
check_vendor_extension(pa_v5, v5param);
+ if (available_error_type & ACPI65_EINJV2_SUPP) {
+ len = v5param->einjv2_struct.length;
+ offset = offsetof(struct einjv2_extension_struct, component_arr);
+ nr_components = (len - offset) / 32;
+ acpi_os_unmap_iomem(v5param, sizeof(*v5param));
+ v5param = acpi_os_map_iomem(pa_v5, sizeof(*v5param) + (
+ (nr_components) * sizeof(struct syndrome_array)));
+ }
return v5param;
}
}
@@ -494,10 +512,52 @@ static int __einj_error_inject(u32 type, u32 flags, u64 param1, u64 param2,
v5param->flags = vendor_flags;
} else if (flags) {
v5param->flags = flags;
- v5param->memory_address = param1;
- v5param->memory_address_range = param2;
- v5param->apicid = param3;
- v5param->pcie_sbdf = param4;
+ if (flags & SETWA_FLAGS_MEM) {
+ v5param->memory_address = param1;
+ v5param->memory_address_range = param2;
+ }
+ if (flags & SETWA_FLAGS_EINJV2) {
+ int count = 0, bytes_read, pos = 0;
+ unsigned int comp, synd;
+ struct syndrome_array *component_arr;
+
+ if (component_count > nr_components)
+ goto err_out;
+
+ v5param->einjv2_struct.component_arr_count = component_count;
+ component_arr = v5param->einjv2_struct.component_arr;
+
+ while (sscanf(user_input+pos, "%x %x\n%n", &comp, &synd,
+ &bytes_read) == 2) {
+ count++;
+ pos += bytes_read;
+ if (count > component_count)
+ goto err_out;
+
+ switch (type) {
+ case EINJV2_PROCESSOR_ERROR:
+ component_arr[count-1].comp_id.acpi_id = comp;
+ component_arr[count-1].comp_synd.proc_synd = synd;
+ break;
+ case EINJV2_MEMORY_ERROR:
+ component_arr[count-1].comp_id.device_id = comp;
+ component_arr[count-1].comp_synd.mem_synd = synd;
+ break;
+ case EINJV2_PCIE_ERROR:
+ component_arr[count-1].comp_id.pcie_sbdf = comp;
+ component_arr[count-1].comp_synd.pcie_synd = synd;
+ break;
+ }
+ }
+ if (count != component_count)
+ goto err_out;
+
+ /* clear buffer after user input for next injection */
+ memset(user_input, 0, COMP_ARR_SIZE);
+ } else {
+ v5param->apicid = param3;
+ v5param->pcie_sbdf = param4;
+ }
} else {
switch (type) {
case ACPI_EINJ_PROCESSOR_CORRECTABLE:
@@ -570,6 +630,9 @@ static int __einj_error_inject(u32 type, u32 flags, u64 param1, u64 param2,
rc = apei_exec_run_optional(&ctx, ACPI_EINJ_END_OPERATION);
return rc;
+err_out:
+ memset(user_input, 0, COMP_ARR_SIZE);
+ return -EINVAL;
}
/* Inject the specified hardware error */
@@ -581,9 +644,14 @@ int einj_error_inject(u32 type, u32 flags, u64 param1, u64 param2, u64 param3,
/* If user manually set "flags", make sure it is legal */
if (flags && (flags &
- ~(SETWA_FLAGS_APICID|SETWA_FLAGS_MEM|SETWA_FLAGS_PCIE_SBDF)))
+ ~(SETWA_FLAGS_APICID|SETWA_FLAGS_MEM|SETWA_FLAGS_PCIE_SBDF|SETWA_FLAGS_EINJV2)))
return -EINVAL;
+ /*check if type is a valid EINJv2 error type*/
+ if (flags & SETWA_FLAGS_EINJV2) {
+ if (!(type & available_error_type_v2))
+ return -EINVAL;
+ }
/*
* We need extra sanity checks for memory errors.
* Other types leap directly to injection.
@@ -915,7 +983,8 @@ static void __exit einj_remove(struct platform_device *pdev)
sizeof(struct set_error_type_with_address) :
sizeof(struct einj_parameter);
- acpi_os_unmap_iomem(einj_param, size);
+ acpi_os_unmap_iomem(einj_param,
+ size + (nr_components * sizeof(struct syndrome_array)));
if (vendor_errors.size)
acpi_os_unmap_memory(vendor_errors.data, vendor_errors.size);
}
--
2.34.1
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