[PATCH AUTOSEL 5.12 039/116] KVM: arm64: Use BUG and BUG_ON in nVHE hyp
From: Sasha Levin <sashal@kernel.org>
Date: 2021-05-05 16:34:15
Also in:
kvmarm, lkml, stable
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: Andrew Scull <redacted> [ Upstream commit f79e616f27ab6cd74deb0995a8eead3d1c9d65af ] hyp_panic() reports the address of the panic by using ELR_EL2, but this isn't a useful address when hyp_panic() is called directly. Replace such direct calls with BUG() and BUG_ON() which use BRK to trigger an exception that then goes to hyp_panic() with the correct address. Also remove the hyp_panic() declaration from the header file to avoid accidental misuse. Signed-off-by: Andrew Scull <redacted> Acked-by: Will Deacon <will@kernel.org> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20210318143311.839894-5-ascull@google.com (local) Signed-off-by: Sasha Levin <sashal@kernel.org> --- arch/arm64/include/asm/kvm_hyp.h | 1 - arch/arm64/kvm/hyp/nvhe/hyp-main.c | 2 +- arch/arm64/kvm/hyp/nvhe/hyp-smp.c | 6 ++---- 3 files changed, 3 insertions(+), 6 deletions(-)
diff --git a/arch/arm64/include/asm/kvm_hyp.h b/arch/arm64/include/asm/kvm_hyp.h
index 32ae676236b6..fe5fc814f228 100644
--- a/arch/arm64/include/asm/kvm_hyp.h
+++ b/arch/arm64/include/asm/kvm_hyp.h@@ -100,7 +100,6 @@ u64 __guest_enter(struct kvm_vcpu *vcpu); bool kvm_host_psci_handler(struct kvm_cpu_context *host_ctxt); -void __noreturn hyp_panic(void); #ifdef __KVM_NVHE_HYPERVISOR__ void __noreturn __hyp_do_panic(struct kvm_cpu_context *host_ctxt, u64 spsr, u64 elr, u64 par);
diff --git a/arch/arm64/kvm/hyp/nvhe/hyp-main.c b/arch/arm64/kvm/hyp/nvhe/hyp-main.c
index 936328207bde..821a69601dd9 100644
--- a/arch/arm64/kvm/hyp/nvhe/hyp-main.c
+++ b/arch/arm64/kvm/hyp/nvhe/hyp-main.c@@ -178,6 +178,6 @@ void handle_trap(struct kvm_cpu_context *host_ctxt) handle_host_smc(host_ctxt); break; default: - hyp_panic(); + BUG(); } }
diff --git a/arch/arm64/kvm/hyp/nvhe/hyp-smp.c b/arch/arm64/kvm/hyp/nvhe/hyp-smp.c
index 879559057dee..9f54833af400 100644
--- a/arch/arm64/kvm/hyp/nvhe/hyp-smp.c
+++ b/arch/arm64/kvm/hyp/nvhe/hyp-smp.c@@ -18,8 +18,7 @@ u64 __ro_after_init hyp_cpu_logical_map[NR_CPUS] = { [0 ... NR_CPUS-1] = INVALID u64 cpu_logical_map(unsigned int cpu) { - if (cpu >= ARRAY_SIZE(hyp_cpu_logical_map)) - hyp_panic(); + BUG_ON(cpu >= ARRAY_SIZE(hyp_cpu_logical_map)); return hyp_cpu_logical_map[cpu]; }
@@ -30,8 +29,7 @@ unsigned long __hyp_per_cpu_offset(unsigned int cpu) unsigned long this_cpu_base; unsigned long elf_base; - if (cpu >= ARRAY_SIZE(kvm_arm_hyp_percpu_base)) - hyp_panic(); + BUG_ON(cpu >= ARRAY_SIZE(kvm_arm_hyp_percpu_base)); cpu_base_array = (unsigned long *)&kvm_arm_hyp_percpu_base; this_cpu_base = kern_hyp_va(cpu_base_array[cpu]);
--
2.30.2
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