Received-SPF: pass (google.com: domain of linux-kernel+bounces-194585-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:45e3:2400::1 as permitted sender) client-ip=2604:1380:45e3:2400::1;
From: Rajnesh Kanwal <rkanwal@rivosinc.com>
To: linux-kernel@vger.kernel.org
Cc: linux-perf-users@vger.kernel.org,
	linux-riscv@lists.infradead.org,
	adrian.hunter@intel.com,
	alexander.shishkin@linux.intel.com,
	ajones@ventanamicro.com,
	anup@brainfault.org,
	acme@kernel.org,
	atishp@rivosinc.com,
	beeman@rivosinc.com,
	brauner@kernel.org,
	conor@kernel.org,
	heiko@sntech.de,
	irogers@google.com,
	mingo@redhat.com,
	james.clark@arm.com,
	renyu.zj@linux.alibaba.com,
	jolsa@kernel.org,
	jisheng.teoh@starfivetech.com,
	palmer@dabbelt.com,
	tech-control-transfer-records@lists.riscv.org,
	will@kernel.org,
	kaiwenxue1@gmail.com,
	Rajnesh Kanwal <rkanwal@rivosinc.com>
Subject: [PATCH RFC 2/6] riscv: perf: Add Control transfer records CSR definations.
Date: Wed, 29 May 2024 19:53:33 +0100
Message-Id: <20240529185337.182722-3-rkanwal@rivosinc.com>
In-Reply-To: <20240529185337.182722-1-rkanwal@rivosinc.com>
References: <20240529185337.182722-1-rkanwal@rivosinc.com>
Precedence: bulk
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit

Adding CSR defines for RISCV Control Transfer Records extension [0]
along with bit-field macros for each CSR.

[0]: https://github.com/riscv/riscv-control-transfer-records

Signed-off-by: Rajnesh Kanwal <rkanwal@rivosinc.com>
---
 arch/riscv/include/asm/csr.h | 83 ++++++++++++++++++++++++++++++++++++
 1 file changed, 83 insertions(+)

diff --git a/arch/riscv/include/asm/csr.h b/arch/riscv/include/asm/csr.h
index 701963b64fc4..a80a2ee9d44e 100644
--- a/arch/riscv/include/asm/csr.h
+++ b/arch/riscv/include/asm/csr.h
@@ -309,6 +309,85 @@
 
 #define CSR_SSCOUNTOVF		0xda0
 
+/* M-mode Control Transfer Records CSRs */
+#define CSR_MCTRCTL		0x34e
+
+/* S-mode Control Transfer Records CSRs */
+#define CSR_SCTRCTL		0x14e
+#define CSR_SCTRSTATUS		0x14f
+#define CSR_SCTRDEPTH		0x15f
+
+/* VS-mode Control Transfer Records CSRs */
+#define CSR_VSCTRCTL		0x24e
+
+/* xctrtl CSR bits. */
+#define CTRCTL_U_ENABLE		_AC(0x1, UL)
+#define CTRCTL_S_ENABLE		_AC(0x2, UL)
+#define CTRCTL_M_ENABLE		_AC(0x4, UL)
+#define CTRCTL_RASEMU		_AC(0x80, UL)
+#define CTRCTL_STE		_AC(0x100, UL)
+#define CTRCTL_MTE		_AC(0x200, UL)
+#define CTRCTL_BPFRZ		_AC(0x800, UL)
+#define CTRCTL_LCOFIFRZ		_AC(0x1000, UL)
+#define CTRCTL_EXCINH		_AC(0x200000000, UL)
+#define CTRCTL_INTRINH		_AC(0x400000000, UL)
+#define CTRCTL_TRETINH		_AC(0x800000000, UL)
+#define CTRCTL_NTBREN		_AC(0x1000000000, UL)
+#define CTRCTL_TKBRINH		_AC(0x2000000000, UL)
+#define CTRCTL_INDCALL_INH	_AC(0x10000000000, UL)
+#define CTRCTL_DIRCALL_INH	_AC(0x20000000000, UL)
+#define CTRCTL_INDJUMP_INH	_AC(0x40000000000, UL)
+#define CTRCTL_DIRJUMP_INH	_AC(0x80000000000, UL)
+#define CTRCTL_CORSWAP_INH	_AC(0x100000000000, UL)
+#define CTRCTL_RET_INH		_AC(0x200000000000, UL)
+#define CTRCTL_INDOJUMP_INH	_AC(0x400000000000, UL)
+#define CTRCTL_DIROJUMP_INH	_AC(0x800000000000, UL)
+
+/* sctrstatus CSR bits. */
+#define SCTRSTATUS_WRPTR_MASK	0xFF
+#define SCTRSTATUS_FROZEN	_AC(0x80000000, UL)
+
+#ifdef CONFIG_RISCV_M_MODE
+#define CTRCTL_KERNEL_ENABLE	CTRCTL_M_ENABLE
+#else
+#define CTRCTL_KERNEL_ENABLE	CTRCTL_S_ENABLE
+#endif
+
+/* sctrdepth CSR bits. */
+#define SCTRDEPTH_MASK		0x7
+
+#define SCTRDEPTH_MIN		0x0 /* 16 Entries. */
+#define SCTRDEPTH_MAX		0x4 /* 256 Entries. */
+
+/* ctrsource, ctrtarget and ctrdata CSR bits. */
+#define CTRSOURCE_VALID		0x1ULL
+#define CTRTARGET_MISP		0x1ULL
+
+#define CTRDATA_TYPE_MASK	0xF
+#define CTRDATA_CCV		0x8000
+#define CTRDATA_CCM_MASK	0xFFF0000
+#define CTRDATA_CCE_MASK	0xF0000000
+
+#define CTRDATA_TYPE_NONE			0
+#define CTRDATA_TYPE_EXCEPTION			1
+#define CTRDATA_TYPE_INTERRUPT			2
+#define CTRDATA_TYPE_TRAP_RET			3
+#define CTRDATA_TYPE_NONTAKEN_BRANCH		4
+#define CTRDATA_TYPE_TAKEN_BRANCH		5
+#define CTRDATA_TYPE_RESERVED_6			6
+#define CTRDATA_TYPE_RESERVED_7			7
+#define CTRDATA_TYPE_INDIRECT_CALL		8
+#define CTRDATA_TYPE_DIRECT_CALL		9
+#define CTRDATA_TYPE_INDIRECT_JUMP		10
+#define CTRDATA_TYPE_DIRECT_JUMP		11
+#define CTRDATA_TYPE_CO_ROUTINE_SWAP		12
+#define CTRDATA_TYPE_RETURN			13
+#define CTRDATA_TYPE_OTHER_INDIRECT_JUMP	14
+#define CTRDATA_TYPE_OTHER_DIRECT_JUMP		15
+
+#define CTR_ENTRIES_FIRST	0x200
+#define CTR_ENTRIES_LAST	0x2ff
+
 #define CSR_SSTATUS		0x100
 #define CSR_SIE			0x104
 #define CSR_STVEC		0x105
@@ -490,6 +569,8 @@
 # define CSR_TOPEI	CSR_MTOPEI
 # define CSR_TOPI	CSR_MTOPI
 
+# define CSR_CTRCTL     CSR_MCTRCTL
+
 # define SR_IE		SR_MIE
 # define SR_PIE		SR_MPIE
 # define SR_PP		SR_MPP
@@ -520,6 +601,8 @@
 # define CSR_TOPEI	CSR_STOPEI
 # define CSR_TOPI	CSR_STOPI
 
+# define CSR_CTRCTL     CSR_SCTRCTL
+
 # define SR_IE		SR_SIE
 # define SR_PIE		SR_SPIE
 # define SR_PP		SR_SPP
-- 
2.34.1