[PATCH v4 12/15] arm64: kvm: Duplicate hyp/timer-sr.c for VHE/nVHE

David Brazdil
2020-06-25T13:15:03Z

timer-sr.c contains a HVC handler for setting CNTVOFF_EL2 and two helper
functions for controlling access to physical counter. The former is used by
both VHE/nVHE and is duplicated, the latter are used only by nVHE and moved
to nvhe/timer-sr.c.

Signed-off-by: David Brazdil <dbrazdil@google.com>
---
arch/arm64/include/asm/kvm_hyp.h | 2 ++
arch/arm64/kernel/image-vars.h | 5 -----
arch/arm64/kvm/hyp/Makefile | 2 +-
arch/arm64/kvm/hyp/nvhe/Makefile | 3 ++-
arch/arm64/kvm/hyp/{ => nvhe}/timer-sr.c | 2 +-
arch/arm64/kvm/hyp/vhe/Makefile | 2 +-
arch/arm64/kvm/hyp/vhe/timer-sr.c | 12 ++++++++++++
7 files changed, 19 insertions(+), 9 deletions(-)
rename arch/arm64/kvm/hyp/{ => nvhe}/timer-sr.c (95%)
create mode 100644 arch/arm64/kvm/hyp/vhe/timer-sr.c

diff --git a/arch/arm64/include/asm/kvm_hyp.h b/arch/arm64/include/asm/kvm_hyp.h
index 997c5bda1ac7..19f8b40fe6cf 100644
--- a/arch/arm64/include/asm/kvm_hyp.h
+++ b/arch/arm64/include/asm/kvm_hyp.h
@@ -63,8 +63,10 @@ void __vgic_v3_save_aprs(struct vgic_v3_cpu_if *cpu_if);
void __vgic_v3_restore_aprs(struct vgic_v3_cpu_if *cpu_if);
int __vgic_v3_perform_cpuif_access(struct kvm_vcpu *vcpu);

+#ifdef __KVM_NVHE_HYPERVISOR__
void __timer_enable_traps(struct kvm_vcpu *vcpu);
void __timer_disable_traps(struct kvm_vcpu *vcpu);
+#endif

#ifdef __KVM_NVHE_HYPERVISOR__
void __sysreg_save_state_nvhe(struct kvm_cpu_context *ctxt);
diff --git a/arch/arm64/kernel/image-vars.h b/arch/arm64/kernel/image-vars.h
index 05c642621d61..221024e745c9 100644
--- a/arch/arm64/kernel/image-vars.h
+++ b/arch/arm64/kernel/image-vars.h
@@ -76,11 +76,6 @@ KVM_NVHE_ALIAS(abort_guest_exit_start);
KVM_NVHE_ALIAS(__fpsimd_restore_state);
KVM_NVHE_ALIAS(__fpsimd_save_state);

-/* Symbols defined in timer-sr.c (not yet compiled with nVHE build rules). */
-KVM_NVHE_ALIAS(__kvm_timer_set_cntvoff);
-KVM_NVHE_ALIAS(__timer_disable_traps);
-KVM_NVHE_ALIAS(__timer_enable_traps);
-
/* Symbols defined in vgic-v2-cpuif-proxy.c (not yet compiled with nVHE build rules). */
KVM_NVHE_ALIAS(__vgic_v2_perform_cpuif_access);

diff --git a/arch/arm64/kvm/hyp/Makefile b/arch/arm64/kvm/hyp/Makefile
index f49797237818..ef1aa7fe8f5a 100644
--- a/arch/arm64/kvm/hyp/Makefile
+++ b/arch/arm64/kvm/hyp/Makefile
@@ -13,7 +13,7 @@ subdir-ccflags-y := -I$(incdir) \
obj-$(CONFIG_KVM) += hyp.o vhe/ nvhe/
obj-$(CONFIG_KVM_INDIRECT_VECTORS) += smccc_wa.o

-hyp-y := vgic-v3-sr.o timer-sr.o aarch32.o vgic-v2-cpuif-proxy.o entry.o \
+hyp-y := vgic-v3-sr.o aarch32.o vgic-v2-cpuif-proxy.o entry.o \
fpsimd.o

# KVM code is run at a different exception code with a different map, so
diff --git a/arch/arm64/kvm/hyp/nvhe/Makefile b/arch/arm64/kvm/hyp/nvhe/Makefile
index 61a8160f0dd9..0f4c544f07db 100644
--- a/arch/arm64/kvm/hyp/nvhe/Makefile
+++ b/arch/arm64/kvm/hyp/nvhe/Makefile
@@ -6,7 +6,8 @@
asflags-y := -D__KVM_NVHE_HYPERVISOR__
ccflags-y := -D__KVM_NVHE_HYPERVISOR__

-obj-y := sysreg-sr.o debug-sr.o switch.o tlb.o hyp-init.o ../hyp-entry.o
+obj-y := timer-sr.o sysreg-sr.o debug-sr.o switch.o tlb.o hyp-init.o \
+ ../hyp-entry.o

obj-y := $(patsubst %.o,%.hyp.o,$(obj-y))
extra-y := $(patsubst %.hyp.o,%.hyp.tmp.o,$(obj-y))
diff --git a/arch/arm64/kvm/hyp/timer-sr.c b/arch/arm64/kvm/hyp/nvhe/timer-sr.c
similarity index 95%
rename from arch/arm64/kvm/hyp/timer-sr.c
rename to arch/arm64/kvm/hyp/nvhe/timer-sr.c
index fb5c0be33223..42c8ed71d06e 100644
--- a/arch/arm64/kvm/hyp/timer-sr.c
+++ b/arch/arm64/kvm/hyp/nvhe/timer-sr.c
@@ -10,7 +10,7 @@

#include <asm/kvm_hyp.h>

-void __hyp_text __kvm_timer_set_cntvoff(u64 cntvoff)
+void __kvm_timer_set_cntvoff(u64 cntvoff)
{
write_sysreg(cntvoff, cntvoff_el2);
}
diff --git a/arch/arm64/kvm/hyp/vhe/Makefile b/arch/arm64/kvm/hyp/vhe/Makefile
index 2801582a739a..a1dbbc5409bd 100644
--- a/arch/arm64/kvm/hyp/vhe/Makefile
+++ b/arch/arm64/kvm/hyp/vhe/Makefile
@@ -6,7 +6,7 @@
asflags-y := -D__KVM_VHE_HYPERVISOR__
ccflags-y := -D__KVM_VHE_HYPERVISOR__

-obj-y := sysreg-sr.o debug-sr.o switch.o tlb.o ../hyp-entry.o
+obj-y := timer-sr.o sysreg-sr.o debug-sr.o switch.o tlb.o ../hyp-entry.o

# KVM code is run at a different exception code with a different map, so
# compiler instrumentation that inserts callbacks or checks into the code may
diff --git a/arch/arm64/kvm/hyp/vhe/timer-sr.c b/arch/arm64/kvm/hyp/vhe/timer-sr.c
new file mode 100644
index 000000000000..4cda674a8be6
--- /dev/null
+++ b/arch/arm64/kvm/hyp/vhe/timer-sr.c
@@ -0,0 +1,12 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2012-2015 - ARM Ltd
+ * Author: Marc Zyngier <marc.zyngier@arm.com>
+ */
+
+#include <asm/kvm_hyp.h>
+
+void __kvm_timer_set_cntvoff(u64 cntvoff)
+{
+ write_sysreg(cntvoff, cntvoff_el2);
+}
--
2.27.0