[PATCH v2 kvmtool 05/10] arm: Make the PMUv3 emulation code arm64 specific

From: Alexandru Elisei <alexandru.elisei@arm.com>
To: will@kernel.org, julien.thierry.kdev@gmail.com,
	linux-arm-kernel@lists.infradead.org,
	kvmarm@lists.cs.columbia.edu, maz@kernel.org,
	james.morse@arm.com, suzuki.poulose@arm.com,
	mark.rutland@arm.com, andre.przywara@arm.com
Subject: [PATCH v2 kvmtool 05/10] arm: Make the PMUv3 emulation code arm64 specific
Date: Thu, 27 Jan 2022 16:20:28 +0000	[thread overview]
Message-ID: <20220127162033.54290-6-alexandru.elisei@arm.com> (raw)
In-Reply-To: <20220127162033.54290-1-alexandru.elisei@arm.com>

KVM for aarch32 does not exist anymore, PMUv3 is a hardware feature
present only on aarch64 CPUs, the command line option to enable the
feature for a VCPU is aarch64 specific, the PMU code is called only from
an aarch64 function and it compiles to an empty stub when ARCH=arm.
There is no reason to have the PMUv3 emulation code in the common code
area for arm and arm64, so move it to the arm64 directory, where it can
be expanded in the future without fear of breaking aarch32 support.

Signed-off-by: Alexandru Elisei <alexandru.elisei@arm.com>
---
 Makefile                                              | 4 ++--
 arm/aarch64/arm-cpu.c                                 | 3 ++-
 arm/{include/arm-common => aarch64/include/asm}/pmu.h | 0
 arm/{ => aarch64}/pmu.c                               | 7 ++-----
 4 files changed, 6 insertions(+), 8 deletions(-)
 rename arm/{include/arm-common => aarch64/include/asm}/pmu.h (100%)
 rename arm/{ => aarch64}/pmu.c (93%)

diff --git a/Makefile b/Makefile
index f25114755701..2fe5fb0fba62 100644
--- a/Makefile
+++ b/Makefile
@@ -159,8 +159,7 @@ endif
 
 # ARM
 OBJS_ARM_COMMON		:= arm/fdt.o arm/gic.o arm/gicv2m.o arm/ioport.o \
-			   arm/kvm.o arm/kvm-cpu.o arm/pci.o arm/timer.o \
-			   arm/pmu.o
+			   arm/kvm.o arm/kvm-cpu.o arm/pci.o arm/timer.o
 HDRS_ARM_COMMON		:= arm/include
 ifeq ($(ARCH), arm)
 	DEFINES		+= -DCONFIG_ARM
@@ -182,6 +181,7 @@ ifeq ($(ARCH), arm64)
 	OBJS		+= arm/aarch64/arm-cpu.o
 	OBJS		+= arm/aarch64/kvm-cpu.o
 	OBJS		+= arm/aarch64/kvm.o
+	OBJS		+= arm/aarch64/pmu.o
 	ARCH_INCLUDE	:= $(HDRS_ARM_COMMON)
 	ARCH_INCLUDE	+= -Iarm/aarch64/include
 
diff --git a/arm/aarch64/arm-cpu.c b/arm/aarch64/arm-cpu.c
index d7572b7790b1..1ec37fa60c50 100644
--- a/arm/aarch64/arm-cpu.c
+++ b/arm/aarch64/arm-cpu.c
@@ -5,7 +5,8 @@
 
 #include "arm-common/gic.h"
 #include "arm-common/timer.h"
-#include "arm-common/pmu.h"
+
+#include "asm/pmu.h"
 
 #include <linux/byteorder.h>
 #include <linux/types.h>
diff --git a/arm/include/arm-common/pmu.h b/arm/aarch64/include/asm/pmu.h
similarity index 100%
rename from arm/include/arm-common/pmu.h
rename to arm/aarch64/include/asm/pmu.h
diff --git a/arm/pmu.c b/arm/aarch64/pmu.c
similarity index 93%
rename from arm/pmu.c
rename to arm/aarch64/pmu.c
index 5b058eabb49d..6b190c5e2ae5 100644
--- a/arm/pmu.c
+++ b/arm/aarch64/pmu.c
@@ -4,9 +4,9 @@
 #include "kvm/util.h"
 
 #include "arm-common/gic.h"
-#include "arm-common/pmu.h"
 
-#ifdef CONFIG_ARM64
+#include "asm/pmu.h"
+
 static int set_pmu_attr(struct kvm *kvm, int vcpu_idx,
 			struct kvm_device_attr *attr)
 {
@@ -71,6 +71,3 @@ void pmu__generate_fdt_nodes(void *fdt, struct kvm *kvm)
 	_FDT(fdt_property(fdt, "interrupts", irq_prop, sizeof(irq_prop)));
 	_FDT(fdt_end_node(fdt));
 }
-#else
-void pmu__generate_fdt_nodes(void *fdt, struct kvm *kvm) { }
-#endif
-- 
2.31.1

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