From 3bd391f056df61e928de1680ff4a3e7e07e5b399 Mon Sep 17 00:00:00 2001 From: Andi Kleen Date: Thu, 26 Jan 2012 00:09:06 +0100 Subject: crypto: Add support for x86 cpuid auto loading for x86 crypto drivers Add support for auto-loading of crypto drivers based on cpuid features. This enables auto-loading of the VIA and Intel specific drivers for AES, hashing and CRCs. Requires the earlier infrastructure patch to add x86 modinfo. I kept it all in a single patch for now. I dropped the printks when the driver cpuid doesn't match (imho drivers never should print anything in such a case) One drawback is that udev doesn't know if the drivers are used or not, so they will be unconditionally loaded at boot up. That's better than not loading them at all, like it often happens. Cc: Dave Jones Cc: Kay Sievers Cc: Jen Axboe Cc: Herbert Xu Cc: Huang Ying Signed-off-by: Andi Kleen Signed-off-by: Thomas Renninger Acked-by: H. Peter Anvin Signed-off-by: Greg Kroah-Hartman --- drivers/crypto/padlock-aes.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) (limited to 'drivers/crypto/padlock-aes.c') diff --git a/drivers/crypto/padlock-aes.c b/drivers/crypto/padlock-aes.c index 29b9469f8378..37b2e9406af6 100644 --- a/drivers/crypto/padlock-aes.c +++ b/drivers/crypto/padlock-aes.c @@ -19,6 +19,7 @@ #include #include #include +#include #include #include #include @@ -503,12 +504,18 @@ static struct crypto_alg cbc_aes_alg = { } }; +static struct x86_cpu_id padlock_cpu_id[] = { + X86_FEATURE_MATCH(X86_FEATURE_XCRYPT), + {} +}; +MODULE_DEVICE_TABLE(x86cpu, padlock_cpu_id); + static int __init padlock_init(void) { int ret; struct cpuinfo_x86 *c = &cpu_data(0); - if (!cpu_has_xcrypt) + if (!x86_match_cpu(padlock_cpu_id)) return -ENODEV; if (!cpu_has_xcrypt_enabled) { -- cgit v1.2.3