50 lines
1.3 KiB
Diff
50 lines
1.3 KiB
Diff
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From 4163f4f6ff8534b171c8b1b044452b930629576d Mon Sep 17 00:00:00 2001
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From: Weili Qian <qianweili@huawei.com>
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Date: Sat, 23 Mar 2024 17:54:16 +0800
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Subject: [PATCH 29/44] uadk/wd_alg: check whether the platform supports SVE
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If the algorithm uses the SVE instruction, check whether
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the platform supports SVE before algorithm driver registration.
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If the platform does not support SVE, do not register the algorithm.
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Signed-off-by: Weili Qian <qianweili@huawei.com>
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---
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wd_alg.c | 14 ++++++++++++++
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1 file changed, 14 insertions(+)
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diff --git a/wd_alg.c b/wd_alg.c
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index f34a407..de352d7 100644
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--- a/wd_alg.c
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+++ b/wd_alg.c
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@@ -109,6 +109,19 @@ static bool wd_check_ce_support(const char *dev_name)
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return false;
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}
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+static bool wd_check_sve_support(void)
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+{
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+ unsigned long hwcaps = 0;
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+
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+ #if defined(__aarch64__)
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+ hwcaps = getauxval(AT_HWCAP);
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+ #endif
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+ if (hwcaps & HWCAP_SVE)
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+ return true;
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+
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+ return false;
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+}
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+
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static bool wd_alg_check_available(int calc_type, const char *dev_name)
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{
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bool ret = false;
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@@ -122,6 +135,7 @@ static bool wd_alg_check_available(int calc_type, const char *dev_name)
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break;
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/* Should find the CPU if not support SVE */
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case UADK_ALG_SVE_INSTR:
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+ ret = wd_check_sve_support();
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break;
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/* Check if the current driver has device support */
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case UADK_ALG_HW:
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--
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2.25.1
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