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authorDavid S. Miller <davem@davemloft.net>2012-09-15 09:46:25 -0700
committerDavid S. Miller <davem@davemloft.net>2012-09-15 09:46:25 -0700
commit979e93ca24e8336acb660529676dcda6817d8a1f (patch)
tree40f854f3b7b0e3e333738cf699d0acfcbfef85bf /arch/sparc/crypto
parent71741680a9858a7fcba54acf5b321d185abef1e8 (diff)
downloadlinux-979e93ca24e8336acb660529676dcda6817d8a1f.tar.gz
sparc64: Add auto-loading mechanism to crypto-opcode drivers.
Just simply provide a device table containing an entry for sun4v cpus, the capability mask checks in the drivers themselves will take care of the rest. This makes the bootup logs on pre-T4 cpus slightly more verbose, with each driver indicating lack of support for the associated opcode(s). But this isn't too much of a real problem. I toyed with the idea of using explicit entries with compatability fields of "SPARC-T4", "SPARC-T5", etc. but all future cpus will have some subset of these opcodes available and this would just be one more pointless thing to do as each new cpu is released with a new string. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/crypto')
-rw-r--r--arch/sparc/crypto/Makefile16
-rw-r--r--arch/sparc/crypto/crop_devid.c14
2 files changed, 22 insertions, 8 deletions
diff --git a/arch/sparc/crypto/Makefile b/arch/sparc/crypto/Makefile
index 5d469d81761f..6ae1ad5e502b 100644
--- a/arch/sparc/crypto/Makefile
+++ b/arch/sparc/crypto/Makefile
@@ -13,13 +13,13 @@ obj-$(CONFIG_CRYPTO_DES_SPARC64) += camellia-sparc64.o
obj-$(CONFIG_CRYPTO_CRC32C_SPARC64) += crc32c-sparc64.o
-sha1-sparc64-y := sha1_asm.o sha1_glue.o
-sha256-sparc64-y := sha256_asm.o sha256_glue.o
-sha512-sparc64-y := sha512_asm.o sha512_glue.o
-md5-sparc64-y := md5_asm.o md5_glue.o
+sha1-sparc64-y := sha1_asm.o sha1_glue.o crop_devid.o
+sha256-sparc64-y := sha256_asm.o sha256_glue.o crop_devid.o
+sha512-sparc64-y := sha512_asm.o sha512_glue.o crop_devid.o
+md5-sparc64-y := md5_asm.o md5_glue.o crop_devid.o
-aes-sparc64-y := aes_asm.o aes_glue.o
-des-sparc64-y := des_asm.o des_glue.o
-camellia-sparc64-y := camellia_asm.o camellia_glue.o
+aes-sparc64-y := aes_asm.o aes_glue.o crop_devid.o
+des-sparc64-y := des_asm.o des_glue.o crop_devid.o
+camellia-sparc64-y := camellia_asm.o camellia_glue.o crop_devid.o
-crc32c-sparc64-y := crc32c_asm.o crc32c_glue.o
+crc32c-sparc64-y := crc32c_asm.o crc32c_glue.o crop_devid.o
diff --git a/arch/sparc/crypto/crop_devid.c b/arch/sparc/crypto/crop_devid.c
new file mode 100644
index 000000000000..5f5724a0ae22
--- /dev/null
+++ b/arch/sparc/crypto/crop_devid.c
@@ -0,0 +1,14 @@
+#include <linux/module.h>
+#include <linux/of_device.h>
+
+/* This is a dummy device table linked into all of the crypto
+ * opcode drivers. It serves to trigger the module autoloading
+ * mechanisms in userspace which scan the OF device tree and
+ * load any modules which have device table entries that
+ * match OF device nodes.
+ */
+static const struct of_device_id crypto_opcode_match[] = {
+ { .name = "cpu", .compatible = "sun4v", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, crypto_opcode_match);