linux-kernel - [PATCH] ARM: mach-virt: fix PMUv3 dependendency

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Message-Id: <20230328144405.1527555-1-arnd@kernel.org>
Date:   Tue, 28 Mar 2023 16:43:44 +0200
From:   Arnd Bergmann <arnd@...nel.org>
To:     Zaid Al-Bassam <zalbassam@...gle.com>,
        Marc Zyngier <maz@...nel.org>, Will Deacon <will@...nel.org>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Russell King <linux@...linux.org.uk>,
        Linus Walleij <linus.walleij@...aro.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] ARM: mach-virt: fix PMUv3 dependendency

From: Arnd Bergmann <arnd@...db.de>

Selecting a ARM_PMUV3 from a platform option breaks the build
when CONFIG_ARM_PMU is not already set:

WARNING: unmet direct dependencies detected for ARM_PMUV3
  Depends on [n]: PERF_EVENTS [=y] && HW_PERF_EVENTS [=n] && (ARM [=y] && CPU_V7 [=y] || ARM64)
  Selected by [y]:
  - ARCH_VIRT [=y] && ARCH_MULTI_V7 [=y] && PERF_EVENTS [=y]

drivers/perf/arm_pmuv3.c:48:9: error: 'PERF_MAP_ALL_UNSUPPORTED' undeclared here (not in a function)
   48 |         PERF_MAP_ALL_UNSUPPORTED,
      |         ^~~~~~~~~~~~~~~~~~~~~~~~
drivers/perf/arm_pmuv3.c:63:9: error: 'PERF_CACHE_MAP_ALL_UNSUPPORTED' undeclared here (not in a function)
   63 |         PERF_CACHE_MAP_ALL_UNSUPPORTED,
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/perf/arm_pmuv3.c:65:10: error: implicit declaration of function 'C' [-Werror=implicit-function-declaration]
   65 |         [C(L1D)][C(OP_READ)][C(RESULT_ACCESS)]  = ARMV8_PMUV3_PERFCTR_L1D_CACHE,

Fixes: 3b16f6268e66 ("ARM: mach-virt: Select PMUv3 driver by default")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 arch/arm/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index e8ccacb3653b..700458c7cace 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -397,7 +397,7 @@ config ARCH_VIRT
 	select ARM_GIC_V3
 	select ARM_GIC_V3_ITS if PCI
 	select ARM_PSCI
-	select ARM_PMUV3 if PERF_EVENTS
+	select ARM_PMUV3 if PERF_EVENTS && ARM_PMU
 	select HAVE_ARM_ARCH_TIMER
 
 config ARCH_AIROHA
-- 
2.39.2