From: Brad Smith <brad@comstyle.com>
Date: Sat, 16 Jul 2022 02:44:03 +0000 (-0400)
Subject: accelerated: aarch64: add OpenBSD/aarch64 support
X-Git-Tag: 3.7.7~9^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a7516cb32f356ea18dca6889105a47fa9265905e;p=thirdparty%2Fgnutls.git

accelerated: aarch64: add OpenBSD/aarch64 support

Signed-off-by: Brad Smith <brad@comstyle.com>
---

diff --git a/lib/accelerated/aarch64/aarch64-common.c b/lib/accelerated/aarch64/aarch64-common.c
index 82cd8715fe..cadb436bb7 100644
--- a/lib/accelerated/aarch64/aarch64-common.c
+++ b/lib/accelerated/aarch64/aarch64-common.c
@@ -41,6 +41,10 @@
 # ifdef AT_HWCAP
 #  define USE_AUXVAL
 # endif
+#elif defined(__OpenBSD__)
+# include <sys/sysctl.h>
+# include <machine/cpu.h>
+# include <machine/armreg.h>
 #endif
 
 #if defined(__GNUC__)
@@ -94,6 +98,24 @@ static void discover_caps(unsigned int *caps)
 		*caps |= ARMV8_SHA256;
 	if (c & HWCAP_SHA512)
 		*caps |= ARMV8_SHA512;
+#elif defined(__OpenBSD__) && defined(CPU_ID_AA64ISAR0)
+	const int isar0_mib[] = { CTL_MACHDEP, CPU_ID_AA64ISAR0 };
+	uint64_t isar0;
+	size_t len = sizeof(isar0);
+
+	*caps |= ARMV7_NEON;
+	if (sysctl(isar0_mib, 2, &isar0, &len, NULL, 0) < 0)
+		return;
+	if (ID_AA64ISAR0_AES(isar0) >= ID_AA64ISAR0_AES_BASE)
+		*caps |= ARMV8_AES;
+	if (ID_AA64ISAR0_AES(isar0) >= ID_AA64ISAR0_AES_PMULL)
+		*caps |= ARMV8_PMULL;
+	if (ID_AA64ISAR0_SHA1(isar0) >= ID_AA64ISAR0_SHA1_BASE)
+		*caps |= ARMV8_SHA1;
+	if (ID_AA64ISAR0_SHA2(isar0) >= ID_AA64ISAR0_SHA2_BASE)
+		*caps |= ARMV8_SHA256;
+	if (ID_AA64ISAR0_SHA2(isar0) >= ID_AA64ISAR0_SHA2_512)
+		*caps |= ARMV8_SHA512;
 #endif
 }