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authorXi Ruoyao <xry111@xry111.site>2023-07-21 02:07:04 +0000
committerPauli <pauli@openssl.org>2023-07-28 12:39:41 +1000
commitc612289b77c37f7295d5af0d0e6b6c04e6ba727c (patch)
tree8d2c541d218c93a8ce658ebae4db163869015fe2 /include
parent7f14656e1cc002a09b2d6148302a1fc71a30f7cd (diff)
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)
Diffstat (limited to 'include')
-rw-r--r--include/crypto/aes_platform.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/crypto/aes_platform.h b/include/crypto/aes_platform.h
index 2a6e4d3ec6..17cd9e3238 100644
--- a/include/crypto/aes_platform.h
+++ b/include/crypto/aes_platform.h
@@ -165,7 +165,7 @@ void gcm_ghash_v8(u64 Xi[2],const u128 Htable[16],const u8 *inp, size_t len);
# if defined(__loongarch__) || defined(__loongarch64)
# include "loongarch_arch.h"
# if defined(VPAES_ASM)
-# define VPAES_CAPABLE (OPENSSL_loongarchcap_P & LOONGARCH_CFG2_LSX)
+# define VPAES_CAPABLE (OPENSSL_loongarch_hwcap_P & LOONGARCH_HWCAP_LSX)
# endif
# endif