mirror of https://github.com/openssl/openssl.git
PPC: Try out if mftb works before using it
If this fails try out if mfspr268 works.
Use OPENSSL_ppccap=0x20 for enabling mftb,
OPENSSL_ppccap=0x40 for enabling mfspr268,
and OPENSSL_ppccap=0 for enabling neither.
Fixes #8012
Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/8043)
(cherry picked from commit c8f370485c)
This commit is contained in:
Bernd Edlinger
parent
492f70645c
commit
b6769a3865
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@ -460,4 +460,14 @@ uint32_t OPENSSL_rdtsc(void)
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{
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return 0;
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}
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size_t OPENSSL_instrument_bus(unsigned int *out, size_t cnt)
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{
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return 0;
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}
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size_t OPENSSL_instrument_bus2(unsigned int *out, size_t cnt, size_t max)
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{
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return 0;
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}
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#endif
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@ -22,5 +22,7 @@ extern unsigned int OPENSSL_ppccap_P;
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# define PPC_CRYPTO207 (1<<2)
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# define PPC_FPU (1<<3)
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# define PPC_MADD300 (1<<4)
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# define PPC_MFTB (1<<5)
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# define PPC_MFSPR268 (1<<6)
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#endif
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@ -168,6 +168,45 @@ void OPENSSL_altivec_probe(void);
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void OPENSSL_crypto207_probe(void);
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void OPENSSL_madd300_probe(void);
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long OPENSSL_rdtsc_mftb(void);
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long OPENSSL_rdtsc_mfspr268(void);
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uint32_t OPENSSL_rdtsc(void)
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{
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if (OPENSSL_ppccap_P & PPC_MFTB)
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return OPENSSL_rdtsc_mftb();
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else if (OPENSSL_ppccap_P & PPC_MFSPR268)
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return OPENSSL_rdtsc_mfspr268();
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else
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return 0;
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}
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size_t OPENSSL_instrument_bus_mftb(unsigned int *, size_t);
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size_t OPENSSL_instrument_bus_mfspr268(unsigned int *, size_t);
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size_t OPENSSL_instrument_bus(unsigned int *out, size_t cnt)
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{
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if (OPENSSL_ppccap_P & PPC_MFTB)
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return OPENSSL_instrument_bus_mftb(out, cnt);
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else if (OPENSSL_ppccap_P & PPC_MFSPR268)
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return OPENSSL_instrument_bus_mfspr268(out, cnt);
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else
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return 0;
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}
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size_t OPENSSL_instrument_bus2_mftb(unsigned int *, size_t, size_t);
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size_t OPENSSL_instrument_bus2_mfspr268(unsigned int *, size_t, size_t);
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size_t OPENSSL_instrument_bus2(unsigned int *out, size_t cnt, size_t max)
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{
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if (OPENSSL_ppccap_P & PPC_MFTB)
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return OPENSSL_instrument_bus2_mftb(out, cnt, max);
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else if (OPENSSL_ppccap_P & PPC_MFSPR268)
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return OPENSSL_instrument_bus2_mfspr268(out, cnt, max);
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else
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return 0;
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}
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#if defined(__GLIBC__) && defined(__GLIBC_PREREQ)
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# if __GLIBC_PREREQ(2, 16)
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# include <sys/auxv.h>
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@ -300,8 +339,6 @@ void OPENSSL_cpuid_setup(void)
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if (hwcap & HWCAP_ARCH_3_00) {
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OPENSSL_ppccap_P |= PPC_MADD300;
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}
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return;
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}
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#endif
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@ -322,15 +359,16 @@ void OPENSSL_cpuid_setup(void)
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sigprocmask(SIG_SETMASK, &ill_act.sa_mask, &oset);
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sigaction(SIGILL, &ill_act, &ill_oact);
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#ifndef OSSL_IMPLEMENT_GETAUXVAL
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if (sigsetjmp(ill_jmp,1) == 0) {
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OPENSSL_fpu_probe();
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OPENSSL_ppccap_P |= PPC_FPU;
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if (sizeof(size_t) == 4) {
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#ifdef __linux
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# ifdef __linux
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struct utsname uts;
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if (uname(&uts) == 0 && strcmp(uts.machine, "ppc64") == 0)
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#endif
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# endif
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if (sigsetjmp(ill_jmp, 1) == 0) {
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OPENSSL_ppc64_probe();
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OPENSSL_ppccap_P |= PPC_FPU64;
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@ -355,6 +393,15 @@ void OPENSSL_cpuid_setup(void)
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OPENSSL_madd300_probe();
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OPENSSL_ppccap_P |= PPC_MADD300;
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}
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#endif
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if (sigsetjmp(ill_jmp, 1) == 0) {
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OPENSSL_rdtsc_mftb();
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OPENSSL_ppccap_P |= PPC_MFTB;
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} else if (sigsetjmp(ill_jmp, 1) == 0) {
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OPENSSL_rdtsc_mfspr268();
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OPENSSL_ppccap_P |= PPC_MFSPR268;
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}
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sigaction(SIGILL, &ill_oact, NULL);
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sigprocmask(SIG_SETMASK, &oset, NULL);
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@ -124,26 +124,23 @@ Ladd: lwarx r5,0,r3
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.long 0
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.size .OPENSSL_atomic_add,.-.OPENSSL_atomic_add
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.globl .OPENSSL_rdtsc
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.globl .OPENSSL_rdtsc_mftb
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.align 4
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.OPENSSL_rdtsc:
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___
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$code.=<<___ if ($flavour =~ /64/);
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.OPENSSL_rdtsc_mftb:
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mftb r3
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___
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$code.=<<___ if ($flavour !~ /64/);
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Loop_rdtsc:
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mftbu r5
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mftb r3
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mftbu r4
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cmplw r4,r5
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bne Loop_rdtsc
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___
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$code.=<<___;
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blr
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.long 0
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.byte 0,12,0x14,0,0,0,0,0
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.size .OPENSSL_rdtsc,.-.OPENSSL_rdtsc
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.size .OPENSSL_rdtsc_mftb,.-.OPENSSL_rdtsc_mftb
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.globl .OPENSSL_rdtsc_mfspr268
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.align 4
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.OPENSSL_rdtsc_mfspr268:
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mfspr r3,268
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blr
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.long 0
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.byte 0,12,0x14,0,0,0,0,0
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.size .OPENSSL_rdtsc_mfspr268,.-.OPENSSL_rdtsc_mfspr268
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.globl .OPENSSL_cleanse
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.align 4
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@ -210,9 +207,9 @@ my ($tick,$lasttick)=("r6","r7");
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my ($diff,$lastdiff)=("r8","r9");
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$code.=<<___;
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.globl .OPENSSL_instrument_bus
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.globl .OPENSSL_instrument_bus_mftb
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.align 4
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.OPENSSL_instrument_bus:
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.OPENSSL_instrument_bus_mftb:
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mtctr $cnt
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mftb $lasttick # collect 1st tick
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@ -240,11 +237,11 @@ Loop: mftb $tick
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.long 0
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.byte 0,12,0x14,0,0,0,2,0
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.long 0
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.size .OPENSSL_instrument_bus,.-.OPENSSL_instrument_bus
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.size .OPENSSL_instrument_bus_mftb,.-.OPENSSL_instrument_bus_mftb
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.globl .OPENSSL_instrument_bus2
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.globl .OPENSSL_instrument_bus2_mftb
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.align 4
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.OPENSSL_instrument_bus2:
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.OPENSSL_instrument_bus2_mftb:
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mr r0,$cnt
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slwi $cnt,$cnt,2
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@ -292,7 +289,91 @@ Ldone2:
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.long 0
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.byte 0,12,0x14,0,0,0,3,0
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.long 0
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.size .OPENSSL_instrument_bus2,.-.OPENSSL_instrument_bus2
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.size .OPENSSL_instrument_bus2_mftb,.-.OPENSSL_instrument_bus2_mftb
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.globl .OPENSSL_instrument_bus_mfspr268
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.align 4
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.OPENSSL_instrument_bus_mfspr268:
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mtctr $cnt
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mfspr $lasttick,268 # collect 1st tick
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li $diff,0
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dcbf 0,$out # flush cache line
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lwarx $tick,0,$out # load and lock
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add $tick,$tick,$diff
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stwcx. $tick,0,$out
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stwx $tick,0,$out
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Loop3: mfspr $tick,268
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sub $diff,$tick,$lasttick
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mr $lasttick,$tick
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dcbf 0,$out # flush cache line
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lwarx $tick,0,$out # load and lock
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add $tick,$tick,$diff
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stwcx. $tick,0,$out
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stwx $tick,0,$out
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addi $out,$out,4 # ++$out
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bdnz Loop3
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mr r3,$cnt
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blr
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.long 0
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.byte 0,12,0x14,0,0,0,2,0
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.long 0
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.size .OPENSSL_instrument_bus_mfspr268,.-.OPENSSL_instrument_bus_mfspr268
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.globl .OPENSSL_instrument_bus2_mfspr268
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.align 4
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.OPENSSL_instrument_bus2_mfspr268:
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mr r0,$cnt
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slwi $cnt,$cnt,2
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mfspr $lasttick,268 # collect 1st tick
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li $diff,0
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dcbf 0,$out # flush cache line
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lwarx $tick,0,$out # load and lock
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add $tick,$tick,$diff
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stwcx. $tick,0,$out
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stwx $tick,0,$out
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mfspr $tick,268 # collect 1st diff
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sub $diff,$tick,$lasttick
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mr $lasttick,$tick
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mr $lastdiff,$diff
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Loop4:
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dcbf 0,$out # flush cache line
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lwarx $tick,0,$out # load and lock
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add $tick,$tick,$diff
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stwcx. $tick,0,$out
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stwx $tick,0,$out
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addic. $max,$max,-1
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beq Ldone4
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mfspr $tick,268
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sub $diff,$tick,$lasttick
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mr $lasttick,$tick
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cmplw 7,$diff,$lastdiff
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mr $lastdiff,$diff
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mfcr $tick # pull cr
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not $tick,$tick # flip bits
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rlwinm $tick,$tick,1,29,29 # isolate flipped eq bit and scale
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sub. $cnt,$cnt,$tick # conditional --$cnt
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add $out,$out,$tick # conditional ++$out
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bne Loop4
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Ldone4:
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srwi $cnt,$cnt,2
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sub r3,r0,$cnt
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blr
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.long 0
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.byte 0,12,0x14,0,0,0,3,0
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.long 0
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.size .OPENSSL_instrument_bus2_mfspr268,.-.OPENSSL_instrument_bus2_mfspr268
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___
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}
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@ -92,5 +92,7 @@ void *openssl_fopen(const char *filename, const char *mode);
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# endif
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uint32_t OPENSSL_rdtsc(void);
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size_t OPENSSL_instrument_bus(unsigned int *, size_t);
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size_t OPENSSL_instrument_bus2(unsigned int *, size_t, size_t);
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#endif
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