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authorLuck, Tony <tony.luck@intel.com>2013-11-07 01:30:36 +0400
committerTony Luck <tony.luck@intel.com>2013-12-18 04:04:22 +0400
commit3482fb5e0c1c20ce0dbcfc5ca3b6558a8c455b10 (patch)
tree7df05124c756cd05b66419a7ba741b934903fedc /drivers
parent319e2e3f63c348a9b66db4667efa73178e18b17d (diff)
downloadlinux-3482fb5e0c1c20ce0dbcfc5ca3b6558a8c455b10.tar.xz
ACPI, APEI, EINJ: Changes to the ACPI/APEI/EINJ debugfs interface
When I added support for ACPI5 I made the assumption that injected processor errors would just need to know the APICID, memory errors just the address and mask, and PCIe errors just the segment/bus/device/function. So I had the code check the type of injection and multiplex the "param1" value appropriately. This was not a good assumption :-( There are injection scenarios where we need to specify more than one of these items. E.g. injecting a cache error we need to specify an APICID of the cpu that owns the cache, and also an address (so that we can trip the error by accessing the address). Add a "flags" file to give the user direct access to specify which items are valid in the ACPI SET_ERROR_TYPE_WITH_ADDRESS structure. Also add new files param3 and param4 to hold all these values. For backwards compatability with old injection scripts we maintain the old behaviour if flags remains set at zero (or is reset to 0). Acked-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/acpi/apei/einj.c39
1 files changed, 34 insertions, 5 deletions
diff --git a/drivers/acpi/apei/einj.c b/drivers/acpi/apei/einj.c
index fb57d03e698b..c76674e2a01f 100644
--- a/drivers/acpi/apei/einj.c
+++ b/drivers/acpi/apei/einj.c
@@ -416,7 +416,8 @@ out:
return rc;
}
-static int __einj_error_inject(u32 type, u64 param1, u64 param2)
+static int __einj_error_inject(u32 type, u32 flags, u64 param1, u64 param2,
+ u64 param3, u64 param4)
{
struct apei_exec_context ctx;
u64 val, trigger_paddr, timeout = FIRMWARE_TIMEOUT;
@@ -446,6 +447,12 @@ static int __einj_error_inject(u32 type, u64 param1, u64 param2)
break;
}
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;
} else {
switch (type) {
case ACPI_EINJ_PROCESSOR_CORRECTABLE:
@@ -514,11 +521,17 @@ static int __einj_error_inject(u32 type, u64 param1, u64 param2)
}
/* Inject the specified hardware error */
-static int einj_error_inject(u32 type, u64 param1, u64 param2)
+static int einj_error_inject(u32 type, u32 flags, u64 param1, u64 param2,
+ u64 param3, u64 param4)
{
int rc;
unsigned long pfn;
+ /* If user manually set "flags", make sure it is legal */
+ if (flags && (flags &
+ ~(SETWA_FLAGS_APICID|SETWA_FLAGS_MEM|SETWA_FLAGS_PCIE_SBDF)))
+ return -EINVAL;
+
/*
* We need extra sanity checks for memory errors.
* Other types leap directly to injection.
@@ -532,7 +545,7 @@ static int einj_error_inject(u32 type, u64 param1, u64 param2)
if (type & ACPI5_VENDOR_BIT) {
if (vendor_flags != SETWA_FLAGS_MEM)
goto inject;
- } else if (!(type & MEM_ERROR_MASK))
+ } else if (!(type & MEM_ERROR_MASK) && !(flags & SETWA_FLAGS_MEM))
goto inject;
/*
@@ -546,15 +559,18 @@ static int einj_error_inject(u32 type, u64 param1, u64 param2)
inject:
mutex_lock(&einj_mutex);
- rc = __einj_error_inject(type, param1, param2);
+ rc = __einj_error_inject(type, flags, param1, param2, param3, param4);
mutex_unlock(&einj_mutex);
return rc;
}
static u32 error_type;
+static u32 error_flags;
static u64 error_param1;
static u64 error_param2;
+static u64 error_param3;
+static u64 error_param4;
static struct dentry *einj_debug_dir;
static int available_error_type_show(struct seq_file *m, void *v)
@@ -648,7 +664,8 @@ static int error_inject_set(void *data, u64 val)
if (!error_type)
return -EINVAL;
- return einj_error_inject(error_type, error_param1, error_param2);
+ return einj_error_inject(error_type, error_flags, error_param1, error_param2,
+ error_param3, error_param4);
}
DEFINE_SIMPLE_ATTRIBUTE(error_inject_fops, NULL,
@@ -729,6 +746,10 @@ static int __init einj_init(void)
rc = -ENOMEM;
einj_param = einj_get_parameter_address();
if ((param_extension || acpi5) && einj_param) {
+ fentry = debugfs_create_x32("flags", S_IRUSR | S_IWUSR,
+ einj_debug_dir, &error_flags);
+ if (!fentry)
+ goto err_unmap;
fentry = debugfs_create_x64("param1", S_IRUSR | S_IWUSR,
einj_debug_dir, &error_param1);
if (!fentry)
@@ -737,6 +758,14 @@ static int __init einj_init(void)
einj_debug_dir, &error_param2);
if (!fentry)
goto err_unmap;
+ fentry = debugfs_create_x64("param3", S_IRUSR | S_IWUSR,
+ einj_debug_dir, &error_param3);
+ if (!fentry)
+ goto err_unmap;
+ fentry = debugfs_create_x64("param4", S_IRUSR | S_IWUSR,
+ einj_debug_dir, &error_param4);
+ if (!fentry)
+ goto err_unmap;
fentry = debugfs_create_x32("notrigger", S_IRUSR | S_IWUSR,
einj_debug_dir, &notrigger);