linux-kernel - [RFC PATCH 6/6] riscv: remove PMU menu of Kconfig

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Message-Id: <f704db6a46b6c4d89fcff28433900d1357ba4f26.1593397455.git.zong.li@sifive.com>
Date:   Mon, 29 Jun 2020 11:19:15 +0800
From:   Zong Li <zong.li@...ive.com>
To:     palmer@...belt.com, paul.walmsley@...ive.com,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     Zong Li <zong.li@...ive.com>
Subject: [RFC PATCH 6/6] riscv: remove PMU menu of Kconfig

We only one instance of riscv_pmu now, and use DT file to describe the
platform-specific information, so drop the dependency and menu of
RISCV_BASE_PMU.

Signed-off-by: Zong Li <zong.li@...ive.com>
---
 arch/riscv/Kconfig                  | 13 -------------
 arch/riscv/include/asm/perf_event.h |  2 --
 arch/riscv/kernel/Makefile          |  2 +-
 3 files changed, 1 insertion(+), 16 deletions(-)

diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index 128192e14ff2..deec11e924ce 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -292,19 +292,6 @@ config RISCV_ISA_C
 
 	   If you don't know what to do here, say Y.
 
-menu "supported PMU type"
-	depends on PERF_EVENTS
-
-config RISCV_BASE_PMU
-	bool "Base Performance Monitoring Unit"
-	def_bool y
-	help
-	  A base PMU that serves as a reference implementation and has limited
-	  feature of perf.  It can run on any RISC-V machines so serves as the
-	  fallback, but this option can also be disable to reduce kernel size.
-
-endmenu
-
 config FPU
 	bool "FPU support"
 	default y
diff --git a/arch/riscv/include/asm/perf_event.h b/arch/riscv/include/asm/perf_event.h
index e95d3bbaae3e..9ee654381d8c 100644
--- a/arch/riscv/include/asm/perf_event.h
+++ b/arch/riscv/include/asm/perf_event.h
@@ -12,7 +12,6 @@
 #include <linux/ptrace.h>
 #include <linux/interrupt.h>
 
-#ifdef CONFIG_RISCV_BASE_PMU
 #define RISCV_BASE_COUNTERS	2
 #define RISCV_EVENT_COUNTERS	29
 #define RISCV_TOTAL_COUNTERS	(RISCV_BASE_COUNTERS + RISCV_EVENT_COUNTERS)
@@ -79,7 +78,6 @@
 #define CSR_MHPMEVENT7	0x327
 #define CSR_MHPMEVENT8	0x328
 
-#endif
 #ifdef CONFIG_PERF_EVENTS
 #define perf_arch_bpf_user_pt_regs(regs) (struct user_regs_struct *)regs
 #endif
diff --git a/arch/riscv/kernel/Makefile b/arch/riscv/kernel/Makefile
index b355cf485671..1f5736e996fd 100644
--- a/arch/riscv/kernel/Makefile
+++ b/arch/riscv/kernel/Makefile
@@ -43,7 +43,7 @@ obj-$(CONFIG_MODULE_SECTIONS)	+= module-sections.o
 obj-$(CONFIG_FUNCTION_TRACER)	+= mcount.o ftrace.o
 obj-$(CONFIG_DYNAMIC_FTRACE)	+= mcount-dyn.o
 
-obj-$(CONFIG_RISCV_BASE_PMU)	+= perf_event.o
+obj-$(CONFIG_PERF_EVENTS)	+= perf_event.o
 obj-$(CONFIG_PERF_EVENTS)	+= perf_callchain.o
 obj-$(CONFIG_HAVE_PERF_REGS)	+= perf_regs.o
 obj-$(CONFIG_RISCV_SBI)		+= sbi.o
-- 
2.27.0