aarch64: Add mach_aarch64 API

This currently contains a single RPC to get Linux-compatible hwcaps,
as well as the values of MIDR_EL1 and REVIDR_EL1 system registers.

In the future, this is expected to host the APIs to manage PAC keys,
and possibly some sort of AArch64-specific APIs for userland IRQ
handlers.
Message-ID: <20240415090149.38358-6-bugaevc@gmail.com>

4 files changed, 196 insertions, 0 deletions

diff --git a/aarch64/Makefrag.am b/aarch64/Makefrag.am
index 3da88c18..ff7bcefb 100644
--- a/aarch64/Makefrag.am
+++ b/aarch64/Makefrag.am
@@ -17,6 +17,7 @@
 # Building a distribution.
 #
 EXTRA_DIST += \
+	aarch64/aarch64/mach_aarch64.srv \
 	aarch64/include/mach/aarch64
 
 if HOST_aarch64
@@ -30,6 +31,8 @@ include_mach_aarch64_HEADERS = \
 	aarch64/include/mach/aarch64/asm.h \
 	aarch64/include/mach/aarch64/boolean.h \
 	aarch64/include/mach/aarch64/kern_return.h \
+	aarch64/include/mach/aarch64/mach_aarch64.defs \
+	aarch64/include/mach/aarch64/mach_aarch64_types.h \
 	aarch64/include/mach/aarch64/machine_types.defs \
 	aarch64/include/mach/aarch64/syscall_sw.h \
 	aarch64/include/mach/aarch64/vm_param.h \
diff --git a/aarch64/aarch64/mach_aarch64.srv b/aarch64/aarch64/mach_aarch64.srv
new file mode 100644
index 00000000..7dd8f9e9
--- /dev/null
+++ b/aarch64/aarch64/mach_aarch64.srv
@@ -0,0 +1,23 @@
+/*
+ * Copyright (c) 2023-2024 Free Software Foundation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+/* This is a server presentation file.  */
+
+#define KERNEL_SERVER 1
+
+#include <mach/machine/mach_aarch64.defs>
diff --git a/aarch64/include/mach/aarch64/mach_aarch64.defs b/aarch64/include/mach/aarch64/mach_aarch64.defs
new file mode 100644
index 00000000..0fe1eb62
--- /dev/null
+++ b/aarch64/include/mach/aarch64/mach_aarch64.defs
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2023-2024 Free Software Foundation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+/*
+ * Special functions for aarch64.
+ */
+
+subsystem
+#if	KERNEL_SERVER
+	  KernelServer
+#endif	/* KERNEL_SERVER */
+		       mach_aarch64 4500;
+
+#include <mach/std_types.defs>
+#include <mach/mach_types.defs>
+
+#ifdef	MACH_AARCH64_IMPORTS
+MACH_AARCH64_IMPORTS
+#endif
+
+import <mach/machine/mach_aarch64_types.h>;
+
+/*
+ *	An array containing bitmasks; the meaning of individual
+ *	bits is defined by the HWCAP_* and HWCAP2_* constants
+ *	from the mach_aarch64_types.h header. In this version
+ *	of Mach, the array will contain two items, but future
+ *	versions can add more items and more bits (HWCAP3_* and
+ *	so forth).
+ */
+type	hwcaps_t	=	array[*:16] of uint32_t;
+
+routine aarch64_get_hwcaps(
+		host		: host_t;
+	out	hwcaps		: hwcaps_t, CountInOut;
+	out	midr_el1	: uint64_t;
+	out	revidr_el1	: uint64_t);
diff --git a/aarch64/include/mach/aarch64/mach_aarch64_types.h b/aarch64/include/mach/aarch64/mach_aarch64_types.h
new file mode 100644
index 00000000..98fd6c4b
--- /dev/null
+++ b/aarch64/include/mach/aarch64/mach_aarch64_types.h
@@ -0,0 +1,118 @@
+/*
+ * Copyright (c) 2023-2024 Free Software Foundation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef _MACH_MACH_AARCH64_TYPES_H_
+#define _MACH_MACH_AARCH64_TYPES_H_
+
+/* The currently defined number of hwcap values.
+   More ones could be added in future versions.  */
+#define HWCAPS_COUNT	2
+
+#ifndef __ASSEMBLER__
+#include <stdint.h>
+typedef uint32_t *hwcaps_t;
+#endif
+
+/* These definitions are meant to match those in
+   linux:arch/arm64/include/uapi/asm/hwcap.h and
+   glibc:sysdeps/unix/sysv/linux/aarch64/bits/hwcap.h,
+   but this is not strictly required for anything.  */
+
+#define HWCAP_FP		(1 << 0)
+#define HWCAP_ASIMD		(1 << 1)
+#define HWCAP_EVTSTRM		(1 << 2)
+#define HWCAP_AES		(1 << 3)
+#define HWCAP_PMULL		(1 << 4)
+#define HWCAP_SHA1		(1 << 5)
+#define HWCAP_SHA2		(1 << 6)
+#define HWCAP_CRC32		(1 << 7)
+#define HWCAP_ATOMICS		(1 << 8)
+#define HWCAP_FPHP		(1 << 9)
+#define HWCAP_ASIMDHP		(1 << 10)
+#define HWCAP_CPUID		(1 << 11)
+#define HWCAP_ASIMDRDM		(1 << 12)
+#define HWCAP_JSCVT		(1 << 13)
+#define HWCAP_FCMA		(1 << 14)
+#define HWCAP_LRCPC		(1 << 15)
+#define HWCAP_DCPOP		(1 << 16)
+#define HWCAP_SHA3		(1 << 17)
+#define HWCAP_SM3		(1 << 18)
+#define HWCAP_SM4		(1 << 19)
+#define HWCAP_ASIMDDP		(1 << 20)
+#define HWCAP_SHA512		(1 << 21)
+#define HWCAP_SVE		(1 << 22)
+#define HWCAP_ASIMDFHM		(1 << 23)
+#define HWCAP_DIT		(1 << 24)
+#define HWCAP_USCAT		(1 << 25)
+#define HWCAP_ILRCPC		(1 << 26)
+#define HWCAP_FLAGM		(1 << 27)
+#define HWCAP_SSBS		(1 << 28)
+#define HWCAP_SB		(1 << 29)
+#define HWCAP_PACA		(1 << 30)
+#define HWCAP_PACG		(1UL << 31)
+
+#define HWCAP2_DCPODP		(1 << 0)
+#define HWCAP2_SVE2		(1 << 1)
+#define HWCAP2_SVEAES		(1 << 2)
+#define HWCAP2_SVEPMULL		(1 << 3)
+#define HWCAP2_SVEBITPERM	(1 << 4)
+#define HWCAP2_SVESHA3		(1 << 5)
+#define HWCAP2_SVESM4		(1 << 6)
+#define HWCAP2_FLAGM2		(1 << 7)
+#define HWCAP2_FRINT		(1 << 8)
+#define HWCAP2_SVEI8MM		(1 << 9)
+#define HWCAP2_SVEF32MM		(1 << 10)
+#define HWCAP2_SVEF64MM		(1 << 11)
+#define HWCAP2_SVEBF16		(1 << 12)
+#define HWCAP2_I8MM		(1 << 13)
+#define HWCAP2_BF16		(1 << 14)
+#define HWCAP2_DGH		(1 << 15)
+#define HWCAP2_RNG		(1 << 16)
+#define HWCAP2_BTI		(1 << 17)
+#define HWCAP2_MTE		(1 << 18)
+#define HWCAP2_ECV		(1 << 19)
+#define HWCAP2_AFP		(1 << 20)
+#define HWCAP2_RPRES		(1 << 21)
+#define HWCAP2_MTE3		(1 << 22)
+#define HWCAP2_SME		(1 << 23)
+#define HWCAP2_SME_I16I64	(1 << 24)
+#define HWCAP2_SME_F64F64	(1 << 25)
+#define HWCAP2_SME_I8I32	(1 << 26)
+#define HWCAP2_SME_F16F32	(1 << 27)
+#define HWCAP2_SME_B16F32	(1 << 28)
+#define HWCAP2_SME_F32F32	(1 << 29)
+#define HWCAP2_SME_FA64		(1 << 30)
+#define HWCAP2_WFXT		(1UL << 31)
+#define HWCAP2_EBF16		(1UL << 32)
+#define HWCAP2_SVE_EBF16	(1UL << 33)
+#define HWCAP2_CSSC		(1UL << 34)
+#define HWCAP2_RPRFM		(1UL << 35)
+#define HWCAP2_SVE2P1		(1UL << 36)
+#define HWCAP2_SME2		(1UL << 37)
+#define HWCAP2_SME2P1		(1UL << 38)
+#define HWCAP2_SME_I16I32	(1UL << 39)
+#define HWCAP2_SME_BI32I32	(1UL << 40)
+#define HWCAP2_SME_B16B16	(1UL << 41)
+#define HWCAP2_SME_F16F16	(1UL << 42)
+#define HWCAP2_MOPS		(1UL << 43)
+#define HWCAP2_HBC		(1UL << 44)
+#define HWCAP2_SVE_B16B16	(1UL << 45)
+#define HWCAP2_LRCPC3		(1UL << 46)
+#define HWCAP2_LSE128		(1UL << 47)
+
+#endif