Hi, Jerin Jacob
On 2020/8/17 21:07, Jerin Jacob wrote:
On Mon, Aug 17, 2020 at 6:17 PM Wei Hu (Xavier)
<huwei...@chinasoftinc.com> wrote:
From: "Wei Hu (Xavier)" <xavier.hu...@huawei.com>
SVE is the next-generation SIMD extension of the ARMv8-A AArch64
instruction set.
The related marco definition can be found in linux kernel:
arch/arm64/include/uapi/asm/hwcap.h
This patch supports getting cpu SVE feature on ARM64 platform.
Signed-off-by: Chengwen Feng <fengcheng...@huawei.com>
Signed-off-by: Wei Hu (Xavier) <xavier.hu...@huawei.com>
Change the git commit like
eal/arm64: update CPU flags
OK, I will update it in V3.
---
v1 -> v2:
Adds more sve-related definition to rte_cpu_feature_table,
sunch as SVE2, etc.
---
lib/librte_eal/arm/include/rte_cpuflags_64.h | 1 +
lib/librte_eal/arm/rte_cpuflags.c | 11 +++++++++++
2 files changed, 12 insertions(+)
diff --git a/lib/librte_eal/arm/include/rte_cpuflags_64.h
b/lib/librte_eal/arm/include/rte_cpuflags_64.h
index 95cc01474..069844ddb 100644
--- a/lib/librte_eal/arm/include/rte_cpuflags_64.h
+++ b/lib/librte_eal/arm/include/rte_cpuflags_64.h
@@ -22,6 +22,7 @@ enum rte_cpu_flag_t {
RTE_CPUFLAG_SHA2,
RTE_CPUFLAG_CRC32,
RTE_CPUFLAG_ATOMICS,
+ RTE_CPUFLAG_SVE,
Please intrdouce the flag for all newly added items as well.
OK, I will update it in V3.
RTE_CPUFLAG_AARCH64,
/* The last item */
RTE_CPUFLAG_NUMFLAGS,/**< This should always be the last! */
diff --git a/lib/librte_eal/arm/rte_cpuflags.c
b/lib/librte_eal/arm/rte_cpuflags.c
index caf3dc83a..97a9fcfd4 100644
--- a/lib/librte_eal/arm/rte_cpuflags.c
+++ b/lib/librte_eal/arm/rte_cpuflags.c
@@ -95,6 +95,17 @@ const struct feature_entry rte_cpu_feature_table[] = {
FEAT_DEF(SHA2, REG_HWCAP, 6)
FEAT_DEF(CRC32, REG_HWCAP, 7)
FEAT_DEF(ATOMICS, REG_HWCAP, 8)
+ FEAT_DEF(SVE, REG_HWCAP, 22)
+ FEAT_DEF(SVE2, REG_HWCAP2, 1)
+ FEAT_DEF(SVEAES, REG_HWCAP2, 2)
+ FEAT_DEF(SVEPMULL, REG_HWCAP2, 3)
+ FEAT_DEF(SVEBITPERM, REG_HWCAP2, 4)
+ FEAT_DEF(SVESHA3, REG_HWCAP2, 5)
+ FEAT_DEF(SVESM4, REG_HWCAP2, 6)
Following stuff is missing
HWCAP2_FLAGM2 (1 << 7)
HWCAP2_FRINT (1 << 8)
OK, I will update it in V3.
Thanks, Xavier
+ FEAT_DEF(SVEI8MM, REG_HWCAP2, 9)
+ FEAT_DEF(SVEF32MM, REG_HWCAP2, 10)
+ FEAT_DEF(SVEF64MM, REG_HWCAP2, 11)
+ FEAT_DEF(SVEBF16, REG_HWCAP2, 12)
FEAT_DEF(AARCH64, REG_PLATFORM, 1)
};
#endif /* RTE_ARCH */
--
2.27.0
