Some venerable AMD processors do not support querying extended features
(EAX=7) with cpuid.
In this case, it is not a programmatic error and the runtime check should
simply return the isa is unsupported.
Reported-by: Davide Repetto <red@idp.it>
Reported-at: https://bugzilla.redhat.com/show_bug.cgi?id=2211747
Fixes: b366fa2f4947 ("dpif-netdev: Call cpuid for x86 isa availability.")
Signed-off-by: David Marchand <david.marchand@redhat.com>
Signed-off-by: Ilya Maximets <i.maximets@ovn.org>
This commit adds the AVX512 implementation of the action functionality.
Usage:
$ ovs-appctl odp-execute/action-impl-set avx512
Signed-off-by: Emma Finn <emma.finn@intel.com>
Signed-off-by: Harry van Haaren <harry.van.haaren@intel.com>
Co-authored-by: Harry van Haaren <harry.van.haaren@intel.com>
Acked-by: Sunil Pai G <sunil.pai.g@intel.com>
Acked-by: Eelco Chaudron <echaudro@redhat.com>
Signed-off-by: Ian Stokes <ian.stokes@intel.com>
DPIF AVX512 optimizations currently rely on DPDK availability while
they can be used without DPDK.
Besides, checking for availability of some isa only has to be done once
and won't change while a OVS process runs.
Resolve isa availability in constructors by using a simplified query
based on cpuid API that comes from the compiler.
Note: this also fixes the check on BMI2 availability: DPDK had a bug
for this isa, see https://git.dpdk.org/dpdk/commit/?id=aae3037ab1e0.
Suggested-by: Ilya Maximets <i.maximets@ovn.org>
Signed-off-by: David Marchand <david.marchand@redhat.com>
Signed-off-by: Ilya Maximets <i.maximets@ovn.org>
