arm64/sysreg: Add BRBE registers and fields

This patch adds definitions related to the Branch Record Buffer Extension
(BRBE) as per ARM DDI 0487K.a. These will be used by KVM and a BRBE driver
in subsequent patches.

Some existing BRBE definitions in asm/sysreg.h are replaced with equivalent
generated definitions.

Cc: Marc Zyngier <maz@kernel.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: James Clark <james.clark@linaro.org>
Acked-by: Will Deacon <will@kernel.org>
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
tested-by: Adam Young <admiyo@os.amperecomputing.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20250611-arm-brbe-v19-v23-1-e7775563036e@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>

Author: Anshuman Khandual

arch/arm64/include/asm/sysreg.h

@@ -202,16 +202,8 @@
 #define SYS_DBGVCR32_EL2		sys_reg(2, 4, 0, 7, 0)
 
 #define SYS_BRBINF_EL1(n)		sys_reg(2, 1, 8, (n & 15), (((n & 16) >> 2) | 0))
-#define SYS_BRBINFINJ_EL1		sys_reg(2, 1, 9, 1, 0)
 #define SYS_BRBSRC_EL1(n)		sys_reg(2, 1, 8, (n & 15), (((n & 16) >> 2) | 1))
-#define SYS_BRBSRCINJ_EL1		sys_reg(2, 1, 9, 1, 1)
 #define SYS_BRBTGT_EL1(n)		sys_reg(2, 1, 8, (n & 15), (((n & 16) >> 2) | 2))
-#define SYS_BRBTGTINJ_EL1		sys_reg(2, 1, 9, 1, 2)
-#define SYS_BRBTS_EL1			sys_reg(2, 1, 9, 0, 2)
-
-#define SYS_BRBCR_EL1			sys_reg(2, 1, 9, 0, 0)
-#define SYS_BRBFCR_EL1			sys_reg(2, 1, 9, 0, 1)
-#define SYS_BRBIDR0_EL1			sys_reg(2, 1, 9, 2, 0)
 
 #define SYS_TRCITECR_EL1		sys_reg(3, 0, 1, 2, 3)
 #define SYS_TRCACATR(m)			sys_reg(2, 1, 2, ((m & 7) << 1), (2 | (m >> 3)))
@@ -277,8 +269,6 @@
 /* ETM */
 #define SYS_TRCOSLAR			sys_reg(2, 1, 1, 0, 4)
 
-#define SYS_BRBCR_EL2			sys_reg(2, 4, 9, 0, 0)
-
 #define SYS_MIDR_EL1			sys_reg(3, 0, 0, 0, 0)
 #define SYS_MPIDR_EL1			sys_reg(3, 0, 0, 0, 5)
 #define SYS_REVIDR_EL1			sys_reg(3, 0, 0, 0, 6)
@@ -821,6 +811,12 @@
 #define OP_COSP_RCTX			sys_insn(1, 3, 7, 3, 6)
 #define OP_CPP_RCTX			sys_insn(1, 3, 7, 3, 7)
 
+/*
+ * BRBE Instructions
+ */
+#define BRB_IALL_INSN	__emit_inst(0xd5000000 | OP_BRB_IALL | (0x1f))
+#define BRB_INJ_INSN	__emit_inst(0xd5000000 | OP_BRB_INJ  | (0x1f))
+
 /* Common SCTLR_ELx flags. */
 #define SCTLR_ELx_ENTP2	(BIT(60))
 #define SCTLR_ELx_DSSBS	(BIT(44))

arch/arm64/tools/sysreg

@@ -1329,6 +1329,138 @@ UnsignedEnum	3:0	MTEPERM
 EndEnum
 EndSysreg
 
+
+SysregFields BRBINFx_EL1
+Res0	63:47
+Field	46	CCU
+Field	45:40	CC_EXP
+Field	39:32	CC_MANT
+Res0	31:18
+Field	17	LASTFAILED
+Field	16	T
+Res0	15:14
+Enum	13:8		TYPE
+	0b000000	DIRECT_UNCOND
+	0b000001	INDIRECT
+	0b000010	DIRECT_LINK
+	0b000011	INDIRECT_LINK
+	0b000101	RET
+	0b000111	ERET
+	0b001000	DIRECT_COND
+	0b100001	DEBUG_HALT
+	0b100010	CALL
+	0b100011	TRAP
+	0b100100	SERROR
+	0b100110	INSN_DEBUG
+	0b100111	DATA_DEBUG
+	0b101010	ALIGN_FAULT
+	0b101011	INSN_FAULT
+	0b101100	DATA_FAULT
+	0b101110	IRQ
+	0b101111	FIQ
+	0b110000	IMPDEF_TRAP_EL3
+	0b111001	DEBUG_EXIT
+EndEnum
+Enum	7:6	EL
+	0b00	EL0
+	0b01	EL1
+	0b10	EL2
+	0b11	EL3
+EndEnum
+Field	5	MPRED
+Res0	4:2
+Enum	1:0	VALID
+	0b00	NONE
+	0b01	TARGET
+	0b10	SOURCE
+	0b11	FULL
+EndEnum
+EndSysregFields
+
+SysregFields	BRBCR_ELx
+Res0	63:24
+Field	23 	EXCEPTION
+Field	22 	ERTN
+Res0	21:10
+Field	9	FZPSS
+Field	8 	FZP
+Res0	7
+Enum	6:5	TS
+	0b01	VIRTUAL
+	0b10	GUEST_PHYSICAL
+	0b11	PHYSICAL
+EndEnum
+Field	4	MPRED
+Field	3	CC
+Res0	2
+Field	1	ExBRE
+Field	0	E0BRE
+EndSysregFields
+
+Sysreg	BRBCR_EL1	2	1	9	0	0
+Fields	BRBCR_ELx
+EndSysreg
+
+Sysreg	BRBFCR_EL1	2	1	9	0	1
+Res0	63:30
+Enum	29:28	BANK
+	0b00	BANK_0
+	0b01	BANK_1
+EndEnum
+Res0	27:23
+Field	22	CONDDIR
+Field	21	DIRCALL
+Field	20	INDCALL
+Field	19	RTN
+Field	18	INDIRECT
+Field	17	DIRECT
+Field	16	EnI
+Res0	15:8
+Field	7	PAUSED
+Field	6	LASTFAILED
+Res0	5:0
+EndSysreg
+
+Sysreg	BRBTS_EL1	2	1	9	0	2
+Field	63:0	TS
+EndSysreg
+
+Sysreg	BRBINFINJ_EL1	2	1	9	1	0
+Fields BRBINFx_EL1
+EndSysreg
+
+Sysreg	BRBSRCINJ_EL1	2	1	9	1	1
+Field	63:0 ADDRESS
+EndSysreg
+
+Sysreg	BRBTGTINJ_EL1	2	1	9	1	2
+Field	63:0 ADDRESS
+EndSysreg
+
+Sysreg	BRBIDR0_EL1	2	1	9	2	0
+Res0	63:16
+Enum	15:12	CC
+	0b0101	20_BIT
+EndEnum
+Enum	11:8	FORMAT
+	0b0000	FORMAT_0
+EndEnum
+Enum	7:0		NUMREC
+	0b00001000	8
+	0b00010000	16
+	0b00100000	32
+	0b01000000	64
+EndEnum
+EndSysreg
+
+Sysreg	BRBCR_EL2	2	4	9	0	0
+Fields	BRBCR_ELx
+EndSysreg
+
+Sysreg	BRBCR_EL12	2	5	9	0	0
+Fields	BRBCR_ELx
+EndSysreg
+
 Sysreg	ID_AA64ZFR0_EL1	3	0	0	4	4
 Res0	63:60
 UnsignedEnum	59:56	F64MM