[RFC PATCH 02/27] KVM: arm64: Link position-independent string routines into .hyp.text
From: Quentin Perret <hidden>
Date: 2020-11-17 18:16:45
Also in:
kvmarm, linux-arm-kernel, lkml
Subsystem:
arm64 port (aarch64 architecture), kernel virtual machine for arm64 (kvm/arm64), the rest · Maintainers:
Catalin Marinas, Will Deacon, Marc Zyngier, Oliver Upton, Linus Torvalds
From: Will Deacon <will@kernel.org> Pull clear_page(), copy_page(), memcpy() and memset() into the nVHE hyp code and ensure that we always execute the '__pi_' entry point on the offchance that it changes in future. [ qperret: Commit title nits ] Signed-off-by: Will Deacon <will@kernel.org> Signed-off-by: Quentin Perret <redacted> --- arch/arm64/kernel/image-vars.h | 11 +++++++++++ arch/arm64/kvm/hyp/nvhe/Makefile | 4 ++++ 2 files changed, 15 insertions(+)
diff --git a/arch/arm64/kernel/image-vars.h b/arch/arm64/kernel/image-vars.h
index 8539f34d7538..dd8ccc9efb6a 100644
--- a/arch/arm64/kernel/image-vars.h
+++ b/arch/arm64/kernel/image-vars.h@@ -105,6 +105,17 @@ KVM_NVHE_ALIAS(__stop___kvm_ex_table); /* Array containing bases of nVHE per-CPU memory regions. */ KVM_NVHE_ALIAS(kvm_arm_hyp_percpu_base); +/* Position-independent library routines */ +__kvm_nvhe_clear_page = __kvm_nvhe___pi_clear_page; +__kvm_nvhe_copy_page = __kvm_nvhe___pi_copy_page; +__kvm_nvhe_memcpy = __kvm_nvhe___pi_memcpy; +__kvm_nvhe_memset = __kvm_nvhe___pi_memset; + +#ifdef CONFIG_KASAN +__kvm_nvhe___memcpy = __kvm_nvhe___pi_memcpy; +__kvm_nvhe___memset = __kvm_nvhe___pi_memset; +#endif + #endif /* CONFIG_KVM */ #endif /* __ARM64_KERNEL_IMAGE_VARS_H */
diff --git a/arch/arm64/kvm/hyp/nvhe/Makefile b/arch/arm64/kvm/hyp/nvhe/Makefile
index 1f1e351c5fe2..590fdefb42dd 100644
--- a/arch/arm64/kvm/hyp/nvhe/Makefile
+++ b/arch/arm64/kvm/hyp/nvhe/Makefile@@ -6,10 +6,14 @@ asflags-y := -D__KVM_NVHE_HYPERVISOR__ ccflags-y := -D__KVM_NVHE_HYPERVISOR__ +lib-objs := clear_page.o copy_page.o memcpy.o memset.o +lib-objs := $(addprefix ../../../lib/, $(lib-objs)) + obj-y := timer-sr.o sysreg-sr.o debug-sr.o switch.o tlb.o hyp-init.o host.o \ hyp-main.o hyp-smp.o psci-relay.o obj-y += ../vgic-v3-sr.o ../aarch32.o ../vgic-v2-cpuif-proxy.o ../entry.o \ ../fpsimd.o ../hyp-entry.o ../exception.o +obj-y += $(lib-objs) ## ## Build rules for compiling nVHE hyp code
--
2.29.2.299.gdc1121823c-goog