From: Tony W Wang-oc <TonyWWang-oc@zhaoxin.com>
To: <herbert@gondor.apana.org.au>, <davem@davemloft.net>,
<tglx@linutronix.de>, <mingo@redhat.com>, <bp@alien8.de>,
<x86@kernel.org>, <hpa@zytor.com>, <tony.luck@intel.com>,
<dave.hansen@intel.com>, <seanjc@google.com>,
<fenghua.yu@intel.com>, <thomas.lendacky@amd.com>,
<kyung.min.park@intel.com>, <kim.phillips@amd.com>,
<mgross@linux.intel.com>, <peterz@infradead.org>,
<krish.sadhukhan@oracle.com>, <liam.merwick@oracle.com>,
<mlevitsk@redhat.com>, <reinette.chatre@intel.com>,
<babu.moger@amd.com>, <linux-crypto@vger.kernel.org>,
<linux-kernel@vger.kernel.org>
Cc: <TimGuo-oc@zhaoxin.com>, <CooperYan@zhaoxin.com>,
<QiyuanWang@zhaoxin.com>, <HerryYang@zhaoxin.com>,
<CobeChen@zhaoxin.com>, <SilviaZhao@zhaoxin.com>
Subject: [PATCH v1 3/3] crypto: x86/crc32c-intel Exclude low performance CRC32C instruction CPUs
Date: Thu, 7 Jan 2021 14:19:08 +0800 [thread overview]
Message-ID: <1610000348-17316-4-git-send-email-TonyWWang-oc@zhaoxin.com> (raw)
In-Reply-To: <1610000348-17316-1-git-send-email-TonyWWang-oc@zhaoxin.com>
Low performance CRC32C instruction CPUs expect to use the driver
crc32c-generic. So remove these CPUs support from crc32c-intel.
Signed-off-by: Tony W Wang-oc <TonyWWang-oc@zhaoxin.com>
---
arch/x86/crypto/crc32c-intel_glue.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/arch/x86/crypto/crc32c-intel_glue.c b/arch/x86/crypto/crc32c-intel_glue.c
index feccb52..1b6d289 100644
--- a/arch/x86/crypto/crc32c-intel_glue.c
+++ b/arch/x86/crypto/crc32c-intel_glue.c
@@ -224,6 +224,11 @@ static int __init crc32c_intel_mod_init(void)
{
if (!x86_match_cpu(crc32c_cpu_id))
return -ENODEV;
+
+ /* Don't merit use low performance CRC32C instruction */
+ if (boot_cpu_has(X86_FEATURE_CRC32C))
+ return -ENODEV;
+
#ifdef CONFIG_X86_64
if (boot_cpu_has(X86_FEATURE_PCLMULQDQ)) {
alg.update = crc32c_pcl_intel_update;
--
2.7.4
prev parent reply other threads:[~2021-01-07 6:20 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-07 6:19 [PATCH v1 0/3] crypto: x86/crc32c-intel - Exclude some Zhaoxin CPUs Tony W Wang-oc
2021-01-07 6:19 ` [PATCH v1 1/3] x86/cpufeatures: Add low performance CRC32C instruction CPU feature Tony W Wang-oc
2021-01-07 6:37 ` Borislav Petkov
2021-01-11 10:51 ` Tony W Wang-oc
2021-01-11 11:03 ` Borislav Petkov
2021-01-15 1:43 ` Tony W Wang-oc
2021-01-11 15:20 ` hpa
2021-01-07 6:19 ` [PATCH v1 2/3] x86/cpu: Set low performance CRC32C flag on some Zhaoxin CPUs Tony W Wang-oc
2021-01-07 15:52 ` Dave Hansen
2021-01-11 10:54 ` Tony W Wang-oc
2021-01-07 6:19 ` Tony W Wang-oc [this message]
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