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authorWeiXiong Liao <liaoweixiong@allwinnertech.com>2020-03-25 16:54:59 +0800
committerKees Cook <keescook@chromium.org>2020-05-30 10:34:03 -0700
commit0dc068265a1c5923ffebf40388fbe93050a77ad1 (patch)
tree50324f476088fdc397522c0b2dde68b5635a4bd4 /fs/pstore/blk.c
parent17639f67c1d61aba3c05e7703f75cd468f9d484f (diff)
pstore/zone,blk: Add support for pmsg frontend
Add pmsg support to pstore/blk (through pstore/zone). To enable, pmsg_size must be greater than 0 and a multiple of 4096. Signed-off-by: WeiXiong Liao <liaoweixiong@allwinnertech.com> Link: https://lore.kernel.org/lkml/20200511233229.27745-4-keescook@chromium.org/ Co-developed-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Colin Ian King <colin.king@canonical.com> Link: https://lore.kernel.org/lkml/20200512171932.222102-1-colin.king@canonical.com Co-developed-by: Kees Cook <keescook@chromium.org> Signed-off-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'fs/pstore/blk.c')
-rw-r--r--fs/pstore/blk.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/fs/pstore/blk.c b/fs/pstore/blk.c
index 8f131c6e412e..a9e7078f08d6 100644
--- a/fs/pstore/blk.c
+++ b/fs/pstore/blk.c
@@ -27,6 +27,14 @@ module_param(max_reason, int, 0400);
MODULE_PARM_DESC(max_reason,
"maximum reason for kmsg dump (default 2: Oops and Panic)");
+#if IS_ENABLED(CONFIG_PSTORE_PMSG)
+static long pmsg_size = CONFIG_PSTORE_BLK_PMSG_SIZE;
+#else
+static long pmsg_size = -1;
+#endif
+module_param(pmsg_size, long, 0400);
+MODULE_PARM_DESC(pmsg_size, "pmsg size in kbytes");
+
/*
* blkdev - the block device to use for pstore storage
*
@@ -133,6 +141,7 @@ static int psblk_register_do(struct pstore_device_info *dev)
}
verify_size(kmsg_size, 4096, dev->flags & PSTORE_FLAGS_DMESG);
+ verify_size(pmsg_size, 4096, dev->flags & PSTORE_FLAGS_PMSG);
#undef verify_size
pstore_zone_info->total_size = dev->total_size;