From: Bernd Edlinger Date: Thu, 17 Jan 2019 14:15:57 +0000 (+0100) Subject: PPC: Try out if mftb works before using it X-Git-Tag: OpenSSL_1_1_1b~75 X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff_plain;h=b6769a3865fabc04d0047da8c672981f5afaf787 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 (Merged from https://github.com/openssl/openssl/pull/8043) (cherry picked from commit c8f370485c43729db44b680e41e875ddd7f3108c) --- diff --git a/crypto/cryptlib.c b/crypto/cryptlib.c index 1cd77c96d2..fb314e365c 100644 --- a/crypto/cryptlib.c +++ b/crypto/cryptlib.c @@ -460,4 +460,14 @@ uint32_t OPENSSL_rdtsc(void) { return 0; } + +size_t OPENSSL_instrument_bus(unsigned int *out, size_t cnt) +{ + return 0; +} + +size_t OPENSSL_instrument_bus2(unsigned int *out, size_t cnt, size_t max) +{ + return 0; +} #endif diff --git a/crypto/ppc_arch.h b/crypto/ppc_arch.h index 65cf96fc1f..f0ae4ff047 100644 --- a/crypto/ppc_arch.h +++ b/crypto/ppc_arch.h @@ -22,5 +22,7 @@ extern unsigned int OPENSSL_ppccap_P; # define PPC_CRYPTO207 (1<<2) # define PPC_FPU (1<<3) # define PPC_MADD300 (1<<4) +# define PPC_MFTB (1<<5) +# define PPC_MFSPR268 (1<<6) #endif diff --git a/crypto/ppccap.c b/crypto/ppccap.c index a0a41b32ea..0ce1951116 100644 --- a/crypto/ppccap.c +++ b/crypto/ppccap.c @@ -168,6 +168,45 @@ void OPENSSL_altivec_probe(void); void OPENSSL_crypto207_probe(void); void OPENSSL_madd300_probe(void); +long OPENSSL_rdtsc_mftb(void); +long OPENSSL_rdtsc_mfspr268(void); + +uint32_t OPENSSL_rdtsc(void) +{ + if (OPENSSL_ppccap_P & PPC_MFTB) + return OPENSSL_rdtsc_mftb(); + else if (OPENSSL_ppccap_P & PPC_MFSPR268) + return OPENSSL_rdtsc_mfspr268(); + else + return 0; +} + +size_t OPENSSL_instrument_bus_mftb(unsigned int *, size_t); +size_t OPENSSL_instrument_bus_mfspr268(unsigned int *, size_t); + +size_t OPENSSL_instrument_bus(unsigned int *out, size_t cnt) +{ + if (OPENSSL_ppccap_P & PPC_MFTB) + return OPENSSL_instrument_bus_mftb(out, cnt); + else if (OPENSSL_ppccap_P & PPC_MFSPR268) + return OPENSSL_instrument_bus_mfspr268(out, cnt); + else + return 0; +} + +size_t OPENSSL_instrument_bus2_mftb(unsigned int *, size_t, size_t); +size_t OPENSSL_instrument_bus2_mfspr268(unsigned int *, size_t, size_t); + +size_t OPENSSL_instrument_bus2(unsigned int *out, size_t cnt, size_t max) +{ + if (OPENSSL_ppccap_P & PPC_MFTB) + return OPENSSL_instrument_bus2_mftb(out, cnt, max); + else if (OPENSSL_ppccap_P & PPC_MFSPR268) + return OPENSSL_instrument_bus2_mfspr268(out, cnt, max); + else + return 0; +} + #if defined(__GLIBC__) && defined(__GLIBC_PREREQ) # if __GLIBC_PREREQ(2, 16) # include @@ -300,8 +339,6 @@ void OPENSSL_cpuid_setup(void) if (hwcap & HWCAP_ARCH_3_00) { OPENSSL_ppccap_P |= PPC_MADD300; } - - return; } #endif @@ -322,15 +359,16 @@ void OPENSSL_cpuid_setup(void) sigprocmask(SIG_SETMASK, &ill_act.sa_mask, &oset); sigaction(SIGILL, &ill_act, &ill_oact); +#ifndef OSSL_IMPLEMENT_GETAUXVAL if (sigsetjmp(ill_jmp,1) == 0) { OPENSSL_fpu_probe(); OPENSSL_ppccap_P |= PPC_FPU; if (sizeof(size_t) == 4) { -#ifdef __linux +# ifdef __linux struct utsname uts; if (uname(&uts) == 0 && strcmp(uts.machine, "ppc64") == 0) -#endif +# endif if (sigsetjmp(ill_jmp, 1) == 0) { OPENSSL_ppc64_probe(); OPENSSL_ppccap_P |= PPC_FPU64; @@ -355,6 +393,15 @@ void OPENSSL_cpuid_setup(void) OPENSSL_madd300_probe(); OPENSSL_ppccap_P |= PPC_MADD300; } +#endif + + if (sigsetjmp(ill_jmp, 1) == 0) { + OPENSSL_rdtsc_mftb(); + OPENSSL_ppccap_P |= PPC_MFTB; + } else if (sigsetjmp(ill_jmp, 1) == 0) { + OPENSSL_rdtsc_mfspr268(); + OPENSSL_ppccap_P |= PPC_MFSPR268; + } sigaction(SIGILL, &ill_oact, NULL); sigprocmask(SIG_SETMASK, &oset, NULL); diff --git a/crypto/ppccpuid.pl b/crypto/ppccpuid.pl index 9d1cada4dc..f526c8a522 100755 --- a/crypto/ppccpuid.pl +++ b/crypto/ppccpuid.pl @@ -124,26 +124,23 @@ Ladd: lwarx r5,0,r3 .long 0 .size .OPENSSL_atomic_add,.-.OPENSSL_atomic_add -.globl .OPENSSL_rdtsc +.globl .OPENSSL_rdtsc_mftb .align 4 -.OPENSSL_rdtsc: -___ -$code.=<<___ if ($flavour =~ /64/); - mftb r3 -___ -$code.=<<___ if ($flavour !~ /64/); -Loop_rdtsc: - mftbu r5 +.OPENSSL_rdtsc_mftb: mftb r3 - mftbu r4 - cmplw r4,r5 - bne Loop_rdtsc -___ -$code.=<<___; blr .long 0 .byte 0,12,0x14,0,0,0,0,0 -.size .OPENSSL_rdtsc,.-.OPENSSL_rdtsc +.size .OPENSSL_rdtsc_mftb,.-.OPENSSL_rdtsc_mftb + +.globl .OPENSSL_rdtsc_mfspr268 +.align 4 +.OPENSSL_rdtsc_mfspr268: + mfspr r3,268 + blr + .long 0 + .byte 0,12,0x14,0,0,0,0,0 +.size .OPENSSL_rdtsc_mfspr268,.-.OPENSSL_rdtsc_mfspr268 .globl .OPENSSL_cleanse .align 4 @@ -210,9 +207,9 @@ my ($tick,$lasttick)=("r6","r7"); my ($diff,$lastdiff)=("r8","r9"); $code.=<<___; -.globl .OPENSSL_instrument_bus +.globl .OPENSSL_instrument_bus_mftb .align 4 -.OPENSSL_instrument_bus: +.OPENSSL_instrument_bus_mftb: mtctr $cnt mftb $lasttick # collect 1st tick @@ -240,11 +237,11 @@ Loop: mftb $tick .long 0 .byte 0,12,0x14,0,0,0,2,0 .long 0 -.size .OPENSSL_instrument_bus,.-.OPENSSL_instrument_bus +.size .OPENSSL_instrument_bus_mftb,.-.OPENSSL_instrument_bus_mftb -.globl .OPENSSL_instrument_bus2 +.globl .OPENSSL_instrument_bus2_mftb .align 4 -.OPENSSL_instrument_bus2: +.OPENSSL_instrument_bus2_mftb: mr r0,$cnt slwi $cnt,$cnt,2 @@ -292,7 +289,91 @@ Ldone2: .long 0 .byte 0,12,0x14,0,0,0,3,0 .long 0 -.size .OPENSSL_instrument_bus2,.-.OPENSSL_instrument_bus2 +.size .OPENSSL_instrument_bus2_mftb,.-.OPENSSL_instrument_bus2_mftb + +.globl .OPENSSL_instrument_bus_mfspr268 +.align 4 +.OPENSSL_instrument_bus_mfspr268: + mtctr $cnt + + mfspr $lasttick,268 # collect 1st tick + li $diff,0 + + dcbf 0,$out # flush cache line + lwarx $tick,0,$out # load and lock + add $tick,$tick,$diff + stwcx. $tick,0,$out + stwx $tick,0,$out + +Loop3: mfspr $tick,268 + sub $diff,$tick,$lasttick + mr $lasttick,$tick + dcbf 0,$out # flush cache line + lwarx $tick,0,$out # load and lock + add $tick,$tick,$diff + stwcx. $tick,0,$out + stwx $tick,0,$out + addi $out,$out,4 # ++$out + bdnz Loop3 + + mr r3,$cnt + blr + .long 0 + .byte 0,12,0x14,0,0,0,2,0 + .long 0 +.size .OPENSSL_instrument_bus_mfspr268,.-.OPENSSL_instrument_bus_mfspr268 + +.globl .OPENSSL_instrument_bus2_mfspr268 +.align 4 +.OPENSSL_instrument_bus2_mfspr268: + mr r0,$cnt + slwi $cnt,$cnt,2 + + mfspr $lasttick,268 # collect 1st tick + li $diff,0 + + dcbf 0,$out # flush cache line + lwarx $tick,0,$out # load and lock + add $tick,$tick,$diff + stwcx. $tick,0,$out + stwx $tick,0,$out + + mfspr $tick,268 # collect 1st diff + sub $diff,$tick,$lasttick + mr $lasttick,$tick + mr $lastdiff,$diff +Loop4: + dcbf 0,$out # flush cache line + lwarx $tick,0,$out # load and lock + add $tick,$tick,$diff + stwcx. $tick,0,$out + stwx $tick,0,$out + + addic. $max,$max,-1 + beq Ldone4 + + mfspr $tick,268 + sub $diff,$tick,$lasttick + mr $lasttick,$tick + cmplw 7,$diff,$lastdiff + mr $lastdiff,$diff + + mfcr $tick # pull cr + not $tick,$tick # flip bits + rlwinm $tick,$tick,1,29,29 # isolate flipped eq bit and scale + + sub. $cnt,$cnt,$tick # conditional --$cnt + add $out,$out,$tick # conditional ++$out + bne Loop4 + +Ldone4: + srwi $cnt,$cnt,2 + sub r3,r0,$cnt + blr + .long 0 + .byte 0,12,0x14,0,0,0,3,0 + .long 0 +.size .OPENSSL_instrument_bus2_mfspr268,.-.OPENSSL_instrument_bus2_mfspr268 ___ } diff --git a/include/internal/cryptlib.h b/include/internal/cryptlib.h index 329ef62014..7e2092359e 100644 --- a/include/internal/cryptlib.h +++ b/include/internal/cryptlib.h @@ -92,5 +92,7 @@ void *openssl_fopen(const char *filename, const char *mode); # endif uint32_t OPENSSL_rdtsc(void); +size_t OPENSSL_instrument_bus(unsigned int *, size_t); +size_t OPENSSL_instrument_bus2(unsigned int *, size_t, size_t); #endif