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openssl/crypto/loongarchcap.c

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Add LoongArch64 cpuid and OPENSSL_loongarchcap_P Loongarch64 architecture defines 128 bit vector extension lsx and 256 bit vector extension lasx. The cpucfg instruction can be used to obtain whether the CPU has a corresponding extension. This part of code is added to prepare for the subsequent addition of corresponding vector instruction optimization. Signed-off-by: zhuchen <zhuchen@loongson.cn> Reviewed-by: Tomas Mraz <tomas@openssl.org> Reviewed-by: Paul Dale <pauli@openssl.org> (Merged from https://github.com/openssl/openssl/pull/19364)
2022-09-29 19:50:52 +08:00
/*
Copyright year updates Reviewed-by: Richard Levitte <levitte@openssl.org> Release: yes
2023-09-07 16:59:15 +08:00
* Copyright 2022-2023 The OpenSSL Project Authors. All Rights Reserved.
Add LoongArch64 cpuid and OPENSSL_loongarchcap_P Loongarch64 architecture defines 128 bit vector extension lsx and 256 bit vector extension lasx. The cpucfg instruction can be used to obtain whether the CPU has a corresponding extension. This part of code is added to prepare for the subsequent addition of corresponding vector instruction optimization. Signed-off-by: zhuchen <zhuchen@loongson.cn> Reviewed-by: Tomas Mraz <tomas@openssl.org> Reviewed-by: Paul Dale <pauli@openssl.org> (Merged from https://github.com/openssl/openssl/pull/19364)
2022-09-29 19:50:52 +08:00
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
vpaes: LoongArch: Use getauxval(AT_HWCAP) for LSX detection Running LSX instructions requires both the hardware support and the kernel support. The `cpucfg` instruction only tests the hardware support, causing a SIGILL if the hardware supports LSX but the kernel does not. Use `getauxval(AT_HWCAP)` as the ["Software Development and Build Convention for LoongArch Architectures"][1] manual suggests. The LOONGARCH_HWCAP_LSX and LOONGARCH_HWCAP_LASX bits are copied from the manual too. In Glibc 2.38 they'll be provided by <sys/auxv.h> as well, but they are unavailable in earlier Glibc versions so we cannot rely on it. The getauxval syscall and Glibc wrapper are available since day one (Linux-5.19 and Glibc-2.36) for LoongArch. Fixes #21508. [1]:https://github.com/loongson/la-softdev-convention/blob/master/la-softdev-convention.adoc#kernel-constraints Reviewed-by: Tomas Mraz <tomas@openssl.org> Reviewed-by: Tom Cosgrove <tom.cosgrove@arm.com> Reviewed-by: Paul Dale <pauli@openssl.org> (Merged from https://github.com/openssl/openssl/pull/21509)
2023-07-21 10:07:04 +08:00
#include <sys/auxv.h>
Add LoongArch64 cpuid and OPENSSL_loongarchcap_P Loongarch64 architecture defines 128 bit vector extension lsx and 256 bit vector extension lasx. The cpucfg instruction can be used to obtain whether the CPU has a corresponding extension. This part of code is added to prepare for the subsequent addition of corresponding vector instruction optimization. Signed-off-by: zhuchen <zhuchen@loongson.cn> Reviewed-by: Tomas Mraz <tomas@openssl.org> Reviewed-by: Paul Dale <pauli@openssl.org> (Merged from https://github.com/openssl/openssl/pull/19364)
2022-09-29 19:50:52 +08:00
#include "loongarch_arch.h"
vpaes: LoongArch: Use getauxval(AT_HWCAP) for LSX detection Running LSX instructions requires both the hardware support and the kernel support. The `cpucfg` instruction only tests the hardware support, causing a SIGILL if the hardware supports LSX but the kernel does not. Use `getauxval(AT_HWCAP)` as the ["Software Development and Build Convention for LoongArch Architectures"][1] manual suggests. The LOONGARCH_HWCAP_LSX and LOONGARCH_HWCAP_LASX bits are copied from the manual too. In Glibc 2.38 they'll be provided by <sys/auxv.h> as well, but they are unavailable in earlier Glibc versions so we cannot rely on it. The getauxval syscall and Glibc wrapper are available since day one (Linux-5.19 and Glibc-2.36) for LoongArch. Fixes #21508. [1]:https://github.com/loongson/la-softdev-convention/blob/master/la-softdev-convention.adoc#kernel-constraints Reviewed-by: Tomas Mraz <tomas@openssl.org> Reviewed-by: Tom Cosgrove <tom.cosgrove@arm.com> Reviewed-by: Paul Dale <pauli@openssl.org> (Merged from https://github.com/openssl/openssl/pull/21509)
2023-07-21 10:07:04 +08:00
unsigned int OPENSSL_loongarch_hwcap_P = 0;
Add LoongArch64 cpuid and OPENSSL_loongarchcap_P Loongarch64 architecture defines 128 bit vector extension lsx and 256 bit vector extension lasx. The cpucfg instruction can be used to obtain whether the CPU has a corresponding extension. This part of code is added to prepare for the subsequent addition of corresponding vector instruction optimization. Signed-off-by: zhuchen <zhuchen@loongson.cn> Reviewed-by: Tomas Mraz <tomas@openssl.org> Reviewed-by: Paul Dale <pauli@openssl.org> (Merged from https://github.com/openssl/openssl/pull/19364)
2022-09-29 19:50:52 +08:00
void OPENSSL_cpuid_setup(void)
{
vpaes: LoongArch: Use getauxval(AT_HWCAP) for LSX detection Running LSX instructions requires both the hardware support and the kernel support. The `cpucfg` instruction only tests the hardware support, causing a SIGILL if the hardware supports LSX but the kernel does not. Use `getauxval(AT_HWCAP)` as the ["Software Development and Build Convention for LoongArch Architectures"][1] manual suggests. The LOONGARCH_HWCAP_LSX and LOONGARCH_HWCAP_LASX bits are copied from the manual too. In Glibc 2.38 they'll be provided by <sys/auxv.h> as well, but they are unavailable in earlier Glibc versions so we cannot rely on it. The getauxval syscall and Glibc wrapper are available since day one (Linux-5.19 and Glibc-2.36) for LoongArch. Fixes #21508. [1]:https://github.com/loongson/la-softdev-convention/blob/master/la-softdev-convention.adoc#kernel-constraints Reviewed-by: Tomas Mraz <tomas@openssl.org> Reviewed-by: Tom Cosgrove <tom.cosgrove@arm.com> Reviewed-by: Paul Dale <pauli@openssl.org> (Merged from https://github.com/openssl/openssl/pull/21509)
2023-07-21 10:07:04 +08:00
OPENSSL_loongarch_hwcap_P = getauxval(AT_HWCAP);
Add LoongArch64 cpuid and OPENSSL_loongarchcap_P Loongarch64 architecture defines 128 bit vector extension lsx and 256 bit vector extension lasx. The cpucfg instruction can be used to obtain whether the CPU has a corresponding extension. This part of code is added to prepare for the subsequent addition of corresponding vector instruction optimization. Signed-off-by: zhuchen <zhuchen@loongson.cn> Reviewed-by: Tomas Mraz <tomas@openssl.org> Reviewed-by: Paul Dale <pauli@openssl.org> (Merged from https://github.com/openssl/openssl/pull/19364)
2022-09-29 19:50:52 +08:00
}
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