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| author | Andy Polyakov <appro@openssl.org> | 2016-04-15 16:39:22 +0200 |
|---|---|---|
| committer | Andy Polyakov <appro@openssl.org> | 2016-04-25 11:53:45 +0200 |
| commit | 670ad0fbf6ebcf113e278d8174081a7e2d2fa44c (patch) | |
| tree | b113688a273d8dcc2e70148a4265c5fd8a6c381c /crypto/s390xcpuid.S | |
| parent | 299ccadcdb99001c618d188fb243c1caaaa86a1c (diff) | |
| download | openssl-670ad0fbf6ebcf113e278d8174081a7e2d2fa44c.zip openssl-670ad0fbf6ebcf113e278d8174081a7e2d2fa44c.tar.gz openssl-670ad0fbf6ebcf113e278d8174081a7e2d2fa44c.tar.bz2 | |
s390x assembly pack: cache capability query results.
IBM argues that in certain scenarios capability query is really
expensive. At the same time it's asserted that query results can
be safely cached, because disabling CPACF is incompatible with
reboot-free operation.
Reviewed-by: Tim Hudson <tjh@openssl.org>
Diffstat (limited to 'crypto/s390xcpuid.S')
| -rw-r--r-- | crypto/s390xcpuid.S | 44 |
1 files changed, 38 insertions, 6 deletions
diff --git a/crypto/s390xcpuid.S b/crypto/s390xcpuid.S index 3402a24..3efad55 100644 --- a/crypto/s390xcpuid.S +++ b/crypto/s390xcpuid.S @@ -5,14 +5,46 @@ .align 16 OPENSSL_s390x_facilities: lghi %r0,0 - larl %r2,OPENSSL_s390xcap_P - stg %r0,8(%r2) - .long 0xb2b02000 # stfle 0(%r2) + larl %r4,OPENSSL_s390xcap_P + stg %r0,8(%r4) # wipe capability vectors + stg %r0,16(%r4) + stg %r0,24(%r4) + stg %r0,32(%r4) + stg %r0,40(%r4) + stg %r0,48(%r4) + stg %r0,56(%r4) + stg %r0,64(%r4) + stg %r0,72(%r4) + + .long 0xb2b04000 # stfle 0(%r4) brc 8,.Ldone lghi %r0,1 - .long 0xb2b02000 # stfle 0(%r2) + .long 0xb2b04000 # stfle 0(%r4) .Ldone: - lg %r2,0(%r2) + lmg %r2,%r3,0(%r4) + tmhl %r2,0x4000 # check for message-security-assist + jz .Lret + + lghi %r0,0 # query kimd capabilities + la %r1,16(%r4) + .long 0xb93e0002 # kimd %r0,%r2 + + lghi %r0,0 # query km capability vector + la %r1,32(%r4) + .long 0xb92e0042 # km %r4,%r2 + + lghi %r0,0 # query kmc capability vector + la %r1,48(%r4) + .long 0xb92f0042 # kmc %r4,%r2 + + tmhh %r3,0x0004 # check for message-security-assist-4 + jz .Lret + + lghi %r0,0 # query kmctr capability vector + la %r1,64(%r4) + .long 0xb92d2042 # kmctr %r4,%r2,%r2 + +.Lret: br %r14 .size OPENSSL_s390x_facilities,.-OPENSSL_s390x_facilities @@ -112,4 +144,4 @@ OPENSSL_instrument_bus2: .section .init brasl %r14,OPENSSL_cpuid_setup -.comm OPENSSL_s390xcap_P,16,8 +.comm OPENSSL_s390xcap_P,80,8 |