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eal/x86: check rdrand and rdseed

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The meson build never checked for the presence of rdrand and rdseed
instructions, while make build never checked for rdseed. Ensure builds
always have the appropriate checks - and therefore defines - for these
instructions. For runtime, we also add in rdseed to the list of known
bits returned from cpuid() instruction, so we can confirm its presence at
application init time.

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
Tested-by: Mattias Rönnblom <mattias.ronnblom@ericsson.com>
This commit is contained in:
Bruce Richardson 2019-05-14 14:37:02 +01:00 committed by Thomas Monjalon
parent a7c5f2606f
commit ffadd933ac
4 changed files with 10 additions and 1 deletions
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5
config/x86/meson.build
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@ -29,11 +29,14 @@ foreach f:base_flags
endforeach
optional_flags = ['AES', 'PCLMUL',
'AVX', 'AVX2', 'AVX512F']
'AVX', 'AVX2', 'AVX512F',
'RDRND', 'RDSEED']
foreach f:optional_flags
if cc.get_define('__@0@__'.format(f), args: machine_args) == '1'
if f == 'PCLMUL' # special case flags with different defines
f = 'PCLMULQDQ'
elif f == 'RDRND'
f = 'RDRAND'
endif
dpdk_conf.set('RTE_MACHINE_CPUFLAG_' + f, 1)
compile_time_cpuflags += ['RTE_CPUFLAG_' + f]

1
lib/librte_eal/common/arch/x86/rte_cpuflags.c
View File

@ -108,6 +108,7 @@ const struct feature_entry rte_cpu_feature_table[] = {
FEAT_DEF(INVPCID, 0x00000007, 0, RTE_REG_EBX, 10)
FEAT_DEF(RTM, 0x00000007, 0, RTE_REG_EBX, 11)
FEAT_DEF(AVX512F, 0x00000007, 0, RTE_REG_EBX, 16)
FEAT_DEF(RDSEED, 0x00000007, 0, RTE_REG_EBX, 18)
FEAT_DEF(LAHF_SAHF, 0x80000001, 0, RTE_REG_ECX, 0)
FEAT_DEF(LZCNT, 0x80000001, 0, RTE_REG_ECX, 4)

1
lib/librte_eal/common/include/arch/x86/rte_cpuflags.h
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@ -97,6 +97,7 @@ enum rte_cpu_flag_t {
RTE_CPUFLAG_INVPCID, /**< INVPCID */
RTE_CPUFLAG_RTM, /**< Transactional memory */
RTE_CPUFLAG_AVX512F, /**< AVX512F */
RTE_CPUFLAG_RDSEED, /**< RDSEED instruction */
/* (EAX 80000001h) ECX features */
RTE_CPUFLAG_LAHF_SAHF, /**< LAHF_SAHF */

4
mk/rte.cpuflags.mk
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@ -51,6 +51,10 @@ ifneq ($(filter $(AUTO_CPUFLAGS),__RDRND__),)
CPUFLAGS += RDRAND
endif
ifneq ($(filter $(AUTO_CPUFLAGS),__RDSEED__),)
CPUFLAGS += RDSEED
endif
ifneq ($(filter $(AUTO_CPUFLAGS),__FSGSBASE__),)
CPUFLAGS += FSGSBASE
endif