acpi/apei/einj: Add extensions to EINJ from rev 5.0 of acpi spec
ACPI 5.0 provides extensions to the EINJ mechanism to specify the target for the error injection - by APICID for cpu related errors, by address for memory related errors, and by segment/bus/device/function for PCIe related errors. Also extensions for vendor specific error injections. Tested-by: Chen Gong <gong.chen@linux.intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>hifive-unleashed-5.1
Tony Luck
Len Brown
parent
805a6af8db
commit
c130bd6f82
|
|
@ -47,20 +47,53 @@ directory apei/einj. The following files are provided.
|
|||
|
||||
- param1
|
||||
This file is used to set the first error parameter value. Effect of
|
||||
parameter depends on error_type specified. For memory error, this is
|
||||
physical memory address. Only available if param_extension module
|
||||
parameter is specified.
|
||||
parameter depends on error_type specified.
|
||||
|
||||
- param2
|
||||
This file is used to set the second error parameter value. Effect of
|
||||
parameter depends on error_type specified. For memory error, this is
|
||||
physical memory address mask. Only available if param_extension
|
||||
module parameter is specified.
|
||||
parameter depends on error_type specified.
|
||||
|
||||
BIOS versions based in the ACPI 4.0 specification have limited options
|
||||
to control where the errors are injected. Your BIOS may support an
|
||||
extension (enabled with the param_extension=1 module parameter, or
|
||||
boot command line einj.param_extension=1). This allows the address
|
||||
and mask for memory injections to be specified by the param1 and
|
||||
param2 files in apei/einj.
|
||||
|
||||
BIOS versions using the ACPI 5.0 specification have more control over
|
||||
the target of the injection. For processor related errors (type 0x1,
|
||||
0x2 and 0x4) the APICID of the target should be provided using the
|
||||
param1 file in apei/einj. For memory errors (type 0x8, 0x10 and 0x20)
|
||||
the address is set using param1 with a mask in param2 (0x0 is equivalent
|
||||
to all ones). For PCI express errors (type 0x40, 0x80 and 0x100) the
|
||||
segment, bus, device and function are specified using param1:
|
||||
|
||||
31 24 23 16 15 11 10 8 7 0
|
||||
+-------------------------------------------------+
|
||||
| segment | bus | device | function | reserved |
|
||||
+-------------------------------------------------+
|
||||
|
||||
An ACPI 5.0 BIOS may also allow vendor specific errors to be injected.
|
||||
In this case a file named vendor will contain identifying information
|
||||
from the BIOS that hopefully will allow an application wishing to use
|
||||
the vendor specific extension to tell that they are running on a BIOS
|
||||
that supports it. All vendor extensions have the 0x80000000 bit set in
|
||||
error_type. A file vendor_flags controls the interpretation of param1
|
||||
and param2 (1 = PROCESSOR, 2 = MEMORY, 4 = PCI). See your BIOS vendor
|
||||
documentation for details (and expect changes to this API if vendors
|
||||
creativity in using this feature expands beyond our expectations).
|
||||
|
||||
Example:
|
||||
# cd /sys/kernel/debug/apei/einj
|
||||
# cat available_error_type # See which errors can be injected
|
||||
0x00000002 Processor Uncorrectable non-fatal
|
||||
0x00000008 Memory Correctable
|
||||
0x00000010 Memory Uncorrectable non-fatal
|
||||
# echo 0x12345000 > param1 # Set memory address for injection
|
||||
# echo 0xfffffffffffff000 > param2 # Mask - anywhere in this page
|
||||
# echo 0x8 > error_type # Choose correctable memory error
|
||||
# echo 1 > error_inject # Inject now
|
||||
|
||||
Injecting parameter support is a BIOS version specific extension, that
|
||||
is, it only works on some BIOS version. If you want to use it, please
|
||||
make sure your BIOS version has the proper support and specify
|
||||
"param_extension=y" in module parameter.
|
||||
|
||||
For more information about EINJ, please refer to ACPI specification
|
||||
version 4.0, section 17.5.
|
||||
version 4.0, section 17.5 and ACPI 5.0, section 18.6.
|
||||
|
|
|
|||
|
|
@ -42,6 +42,42 @@
|
|||
/* Firmware should respond within 1 milliseconds */
|
||||
#define FIRMWARE_TIMEOUT (1 * NSEC_PER_MSEC)
|
||||
|
||||
/*
|
||||
* ACPI version 5 provides a SET_ERROR_TYPE_WITH_ADDRESS action.
|
||||
*/
|
||||
static int acpi5;
|
||||
|
||||
struct set_error_type_with_address {
|
||||
u32 type;
|
||||
u32 vendor_extension;
|
||||
u32 flags;
|
||||
u32 apicid;
|
||||
u64 memory_address;
|
||||
u64 memory_address_range;
|
||||
u32 pcie_sbdf;
|
||||
};
|
||||
enum {
|
||||
SETWA_FLAGS_APICID = 1,
|
||||
SETWA_FLAGS_MEM = 2,
|
||||
SETWA_FLAGS_PCIE_SBDF = 4,
|
||||
};
|
||||
|
||||
/*
|
||||
* Vendor extensions for platform specific operations
|
||||
*/
|
||||
struct vendor_error_type_extension {
|
||||
u32 length;
|
||||
u32 pcie_sbdf;
|
||||
u16 vendor_id;
|
||||
u16 device_id;
|
||||
u8 rev_id;
|
||||
u8 reserved[3];
|
||||
};
|
||||
|
||||
static u32 vendor_flags;
|
||||
static struct debugfs_blob_wrapper vendor_blob;
|
||||
static char vendor_dev[64];
|
||||
|
||||
/*
|
||||
* Some BIOSes allow parameters to the SET_ERROR_TYPE entries in the
|
||||
* EINJ table through an unpublished extension. Use with caution as
|
||||
|
|
@ -103,7 +139,14 @@ static struct apei_exec_ins_type einj_ins_type[] = {
|
|||
*/
|
||||
static DEFINE_MUTEX(einj_mutex);
|
||||
|
||||
static struct einj_parameter *einj_param;
|
||||
static void *einj_param;
|
||||
|
||||
#ifndef readq
|
||||
static inline __u64 readq(volatile void __iomem *addr)
|
||||
{
|
||||
return ((__u64)readl(addr+4) << 32) + readl(addr);
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifndef writeq
|
||||
static inline void writeq(__u64 val, volatile void __iomem *addr)
|
||||
|
|
@ -158,10 +201,31 @@ static int einj_timedout(u64 *t)
|
|||
return 0;
|
||||
}
|
||||
|
||||
static u64 einj_get_parameter_address(void)
|
||||
static void check_vendor_extension(u64 paddr,
|
||||
struct set_error_type_with_address *v5param)
|
||||
{
|
||||
int offset = readl(&v5param->vendor_extension);
|
||||
struct vendor_error_type_extension *v;
|
||||
u32 sbdf;
|
||||
|
||||
if (!offset)
|
||||
return;
|
||||
v = ioremap(paddr + offset, sizeof(*v));
|
||||
if (!v)
|
||||
return;
|
||||
sbdf = readl(&v->pcie_sbdf);
|
||||
sprintf(vendor_dev, "%x:%x:%x.%x vendor_id=%x device_id=%x rev_id=%x\n",
|
||||
sbdf >> 24, (sbdf >> 16) & 0xff,
|
||||
(sbdf >> 11) & 0x1f, (sbdf >> 8) & 0x7,
|
||||
readw(&v->vendor_id), readw(&v->device_id),
|
||||
readb(&v->rev_id));
|
||||
iounmap(v);
|
||||
}
|
||||
|
||||
static void *einj_get_parameter_address(void)
|
||||
{
|
||||
int i;
|
||||
u64 paddr = 0;
|
||||
u64 paddrv4 = 0, paddrv5 = 0;
|
||||
struct acpi_whea_header *entry;
|
||||
|
||||
entry = EINJ_TAB_ENTRY(einj_tab);
|
||||
|
|
@ -170,12 +234,40 @@ static u64 einj_get_parameter_address(void)
|
|||
entry->instruction == ACPI_EINJ_WRITE_REGISTER &&
|
||||
entry->register_region.space_id ==
|
||||
ACPI_ADR_SPACE_SYSTEM_MEMORY)
|
||||
memcpy(&paddr, &entry->register_region.address,
|
||||
sizeof(paddr));
|
||||
memcpy(&paddrv4, &entry->register_region.address,
|
||||
sizeof(paddrv4));
|
||||
if (entry->action == ACPI_EINJ_SET_ERROR_TYPE_WITH_ADDRESS &&
|
||||
entry->instruction == ACPI_EINJ_WRITE_REGISTER &&
|
||||
entry->register_region.space_id ==
|
||||
ACPI_ADR_SPACE_SYSTEM_MEMORY)
|
||||
memcpy(&paddrv5, &entry->register_region.address,
|
||||
sizeof(paddrv5));
|
||||
entry++;
|
||||
}
|
||||
if (paddrv5) {
|
||||
struct set_error_type_with_address *v5param;
|
||||
|
||||
return paddr;
|
||||
v5param = ioremap(paddrv5, sizeof(*v5param));
|
||||
if (v5param) {
|
||||
acpi5 = 1;
|
||||
check_vendor_extension(paddrv5, v5param);
|
||||
return v5param;
|
||||
}
|
||||
}
|
||||
if (paddrv4) {
|
||||
struct einj_parameter *v4param;
|
||||
|
||||
v4param = ioremap(paddrv4, sizeof(*v4param));
|
||||
if (!v4param)
|
||||
return 0;
|
||||
if (readq(&v4param->reserved1) || readq(&v4param->reserved2)) {
|
||||
iounmap(v4param);
|
||||
return 0;
|
||||
}
|
||||
return v4param;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* do sanity check to trigger table */
|
||||
|
|
@ -293,12 +385,56 @@ static int __einj_error_inject(u32 type, u64 param1, u64 param2)
|
|||
if (rc)
|
||||
return rc;
|
||||
apei_exec_ctx_set_input(&ctx, type);
|
||||
rc = apei_exec_run(&ctx, ACPI_EINJ_SET_ERROR_TYPE);
|
||||
if (rc)
|
||||
return rc;
|
||||
if (einj_param) {
|
||||
writeq(param1, &einj_param->param1);
|
||||
writeq(param2, &einj_param->param2);
|
||||
if (acpi5) {
|
||||
struct set_error_type_with_address *v5param = einj_param;
|
||||
|
||||
writel(type, &v5param->type);
|
||||
if (type & 0x80000000) {
|
||||
switch (vendor_flags) {
|
||||
case SETWA_FLAGS_APICID:
|
||||
writel(param1, &v5param->apicid);
|
||||
break;
|
||||
case SETWA_FLAGS_MEM:
|
||||
writeq(param1, &v5param->memory_address);
|
||||
writeq(param2, &v5param->memory_address_range);
|
||||
break;
|
||||
case SETWA_FLAGS_PCIE_SBDF:
|
||||
writel(param1, &v5param->pcie_sbdf);
|
||||
break;
|
||||
}
|
||||
writel(vendor_flags, &v5param->flags);
|
||||
} else {
|
||||
switch (type) {
|
||||
case ACPI_EINJ_PROCESSOR_CORRECTABLE:
|
||||
case ACPI_EINJ_PROCESSOR_UNCORRECTABLE:
|
||||
case ACPI_EINJ_PROCESSOR_FATAL:
|
||||
writel(param1, &v5param->apicid);
|
||||
writel(SETWA_FLAGS_APICID, &v5param->flags);
|
||||
break;
|
||||
case ACPI_EINJ_MEMORY_CORRECTABLE:
|
||||
case ACPI_EINJ_MEMORY_UNCORRECTABLE:
|
||||
case ACPI_EINJ_MEMORY_FATAL:
|
||||
writeq(param1, &v5param->memory_address);
|
||||
writeq(param2, &v5param->memory_address_range);
|
||||
writel(SETWA_FLAGS_MEM, &v5param->flags);
|
||||
break;
|
||||
case ACPI_EINJ_PCIX_CORRECTABLE:
|
||||
case ACPI_EINJ_PCIX_UNCORRECTABLE:
|
||||
case ACPI_EINJ_PCIX_FATAL:
|
||||
writel(param1, &v5param->pcie_sbdf);
|
||||
writel(SETWA_FLAGS_PCIE_SBDF, &v5param->flags);
|
||||
break;
|
||||
}
|
||||
}
|
||||
} else {
|
||||
rc = apei_exec_run(&ctx, ACPI_EINJ_SET_ERROR_TYPE);
|
||||
if (rc)
|
||||
return rc;
|
||||
if (einj_param) {
|
||||
struct einj_parameter *v4param = einj_param;
|
||||
writeq(param1, &v4param->param1);
|
||||
writeq(param2, &v4param->param2);
|
||||
}
|
||||
}
|
||||
rc = apei_exec_run(&ctx, ACPI_EINJ_EXECUTE_OPERATION);
|
||||
if (rc)
|
||||
|
|
@ -408,15 +544,25 @@ static int error_type_set(void *data, u64 val)
|
|||
{
|
||||
int rc;
|
||||
u32 available_error_type = 0;
|
||||
u32 tval, vendor;
|
||||
|
||||
/*
|
||||
* Vendor defined types have 0x80000000 bit set, and
|
||||
* are not enumerated by ACPI_EINJ_GET_ERROR_TYPE
|
||||
*/
|
||||
vendor = val & 0x80000000;
|
||||
tval = val & 0x7fffffff;
|
||||
|
||||
/* Only one error type can be specified */
|
||||
if (val & (val - 1))
|
||||
return -EINVAL;
|
||||
rc = einj_get_available_error_type(&available_error_type);
|
||||
if (rc)
|
||||
return rc;
|
||||
if (!(val & available_error_type))
|
||||
if (tval & (tval - 1))
|
||||
return -EINVAL;
|
||||
if (!vendor) {
|
||||
rc = einj_get_available_error_type(&available_error_type);
|
||||
if (rc)
|
||||
return rc;
|
||||
if (!(val & available_error_type))
|
||||
return -EINVAL;
|
||||
}
|
||||
error_type = val;
|
||||
|
||||
return 0;
|
||||
|
|
@ -455,7 +601,6 @@ static int einj_check_table(struct acpi_table_einj *einj_tab)
|
|||
static int __init einj_init(void)
|
||||
{
|
||||
int rc;
|
||||
u64 param_paddr;
|
||||
acpi_status status;
|
||||
struct dentry *fentry;
|
||||
struct apei_exec_context ctx;
|
||||
|
|
@ -509,23 +654,30 @@ static int __init einj_init(void)
|
|||
rc = apei_exec_pre_map_gars(&ctx);
|
||||
if (rc)
|
||||
goto err_release;
|
||||
if (param_extension) {
|
||||
param_paddr = einj_get_parameter_address();
|
||||
if (param_paddr) {
|
||||
einj_param = ioremap(param_paddr, sizeof(*einj_param));
|
||||
rc = -ENOMEM;
|
||||
if (!einj_param)
|
||||
goto err_unmap;
|
||||
fentry = debugfs_create_x64("param1", S_IRUSR | S_IWUSR,
|
||||
einj_debug_dir, &error_param1);
|
||||
if (!fentry)
|
||||
goto err_unmap;
|
||||
fentry = debugfs_create_x64("param2", S_IRUSR | S_IWUSR,
|
||||
einj_debug_dir, &error_param2);
|
||||
if (!fentry)
|
||||
goto err_unmap;
|
||||
} else
|
||||
pr_warn(EINJ_PFX "Parameter extension is not supported.\n");
|
||||
|
||||
einj_param = einj_get_parameter_address();
|
||||
if ((param_extension || acpi5) && einj_param) {
|
||||
fentry = debugfs_create_x64("param1", S_IRUSR | S_IWUSR,
|
||||
einj_debug_dir, &error_param1);
|
||||
if (!fentry)
|
||||
goto err_unmap;
|
||||
fentry = debugfs_create_x64("param2", S_IRUSR | S_IWUSR,
|
||||
einj_debug_dir, &error_param2);
|
||||
if (!fentry)
|
||||
goto err_unmap;
|
||||
}
|
||||
|
||||
if (vendor_dev[0]) {
|
||||
vendor_blob.data = vendor_dev;
|
||||
vendor_blob.size = strlen(vendor_dev);
|
||||
fentry = debugfs_create_blob("vendor", S_IRUSR,
|
||||
einj_debug_dir, &vendor_blob);
|
||||
if (!fentry)
|
||||
goto err_unmap;
|
||||
fentry = debugfs_create_x32("vendor_flags", S_IRUSR | S_IWUSR,
|
||||
einj_debug_dir, &vendor_flags);
|
||||
if (!fentry)
|
||||
goto err_unmap;
|
||||
}
|
||||
|
||||
pr_info(EINJ_PFX "Error INJection is initialized.\n");
|
||||
|
|
|
|||
|
|
@ -228,7 +228,8 @@ enum acpi_einj_actions {
|
|||
ACPI_EINJ_EXECUTE_OPERATION = 5,
|
||||
ACPI_EINJ_CHECK_BUSY_STATUS = 6,
|
||||
ACPI_EINJ_GET_COMMAND_STATUS = 7,
|
||||
ACPI_EINJ_ACTION_RESERVED = 8, /* 8 and greater are reserved */
|
||||
ACPI_EINJ_SET_ERROR_TYPE_WITH_ADDRESS = 8,
|
||||
ACPI_EINJ_ACTION_RESERVED = 9, /* 9 and greater are reserved */
|
||||
ACPI_EINJ_TRIGGER_ERROR = 0xFF /* Except for this value */
|
||||
};
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue