From: David Brazdil <dbrazdil@google.com>
To: Marc Zyngier <maz@kernel.org>
Cc: kvmarm@lists.cs.columbia.edu,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: [PATCH] arm64: kvm: Clean up cpu_init_hyp_mode()
Date: Fri, 15 May 2020 16:20:56 +0100 [thread overview]
Message-ID: <20200515152056.83158-1-dbrazdil@google.com> (raw)
Pull bits of code to the only place where it is used. Remove empty function
__cpu_init_stage2(). Remove redundant has_vhe() check since this function is
nVHE-only. No functional changes intended.
Signed-off-by: David Brazdil <dbrazdil@google.com>
---
arch/arm64/include/asm/kvm_asm.h | 2 ++
arch/arm64/include/asm/kvm_host.h | 35 -------------------------------
arch/arm64/kvm/arm.c | 32 +++++++++++++++++++++++-----
3 files changed, 29 insertions(+), 40 deletions(-)
diff --git a/arch/arm64/include/asm/kvm_asm.h b/arch/arm64/include/asm/kvm_asm.h
index 59e314f38e43..0c9b5fc4ba0a 100644
--- a/arch/arm64/include/asm/kvm_asm.h
+++ b/arch/arm64/include/asm/kvm_asm.h
@@ -70,6 +70,8 @@ extern int kvm_vcpu_run_vhe(struct kvm_vcpu *vcpu);
extern int __kvm_vcpu_run_nvhe(struct kvm_vcpu *vcpu);
+extern void __kvm_enable_ssbs(void);
+
extern u64 __vgic_v3_get_ich_vtr_el2(void);
extern u64 __vgic_v3_read_vmcr(void);
extern void __vgic_v3_write_vmcr(u32 vmcr);
diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index a723f84fab83..69a338a390a6 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -533,39 +533,6 @@ static inline void kvm_init_host_cpu_context(struct kvm_cpu_context *cpu_ctxt)
cpu_ctxt->sys_regs[MPIDR_EL1] = read_cpuid_mpidr();
}
-void __kvm_enable_ssbs(void);
-
-static inline void __cpu_init_hyp_mode(phys_addr_t pgd_ptr,
- unsigned long hyp_stack_ptr,
- unsigned long vector_ptr)
-{
- /*
- * Calculate the raw per-cpu offset without a translation from the
- * kernel's mapping to the linear mapping, and store it in tpidr_el2
- * so that we can use adr_l to access per-cpu variables in EL2.
- */
- u64 tpidr_el2 = ((u64)this_cpu_ptr(&kvm_host_data) -
- (u64)kvm_ksym_ref(kvm_host_data));
-
- /*
- * Call initialization code, and switch to the full blown HYP code.
- * If the cpucaps haven't been finalized yet, something has gone very
- * wrong, and hyp will crash and burn when it uses any
- * cpus_have_const_cap() wrapper.
- */
- BUG_ON(!system_capabilities_finalized());
- __kvm_call_hyp((void *)pgd_ptr, hyp_stack_ptr, vector_ptr, tpidr_el2);
-
- /*
- * Disabling SSBD on a non-VHE system requires us to enable SSBS
- * at EL2.
- */
- if (!has_vhe() && this_cpu_has_cap(ARM64_SSBS) &&
- arm64_get_ssbd_state() == ARM64_SSBD_FORCE_DISABLE) {
- kvm_call_hyp(__kvm_enable_ssbs);
- }
-}
-
static inline bool kvm_arch_requires_vhe(void)
{
/*
@@ -601,8 +568,6 @@ int kvm_arm_vcpu_arch_get_attr(struct kvm_vcpu *vcpu,
int kvm_arm_vcpu_arch_has_attr(struct kvm_vcpu *vcpu,
struct kvm_device_attr *attr);
-static inline void __cpu_init_stage2(void) {}
-
/* Guest/host FPSIMD coordination helpers */
int kvm_arch_vcpu_run_map_fp(struct kvm_vcpu *vcpu);
void kvm_arch_vcpu_load_fp(struct kvm_vcpu *vcpu);
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index e01d44df98df..b0b569f2cdd0 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -1273,19 +1273,41 @@ static void cpu_init_hyp_mode(void)
{
phys_addr_t pgd_ptr;
unsigned long hyp_stack_ptr;
- unsigned long stack_page;
unsigned long vector_ptr;
+ unsigned long tpidr_el2;
/* Switch from the HYP stub to our own HYP init vector */
__hyp_set_vectors(kvm_get_idmap_vector());
+ /*
+ * Calculate the raw per-cpu offset without a translation from the
+ * kernel's mapping to the linear mapping, and store it in tpidr_el2
+ * so that we can use adr_l to access per-cpu variables in EL2.
+ */
+ tpidr_el2 = ((unsigned long)this_cpu_ptr(&kvm_host_data) -
+ (unsigned long)kvm_ksym_ref(kvm_host_data));
+
pgd_ptr = kvm_mmu_get_httbr();
- stack_page = __this_cpu_read(kvm_arm_hyp_stack_page);
- hyp_stack_ptr = stack_page + PAGE_SIZE;
+ hyp_stack_ptr = __this_cpu_read(kvm_arm_hyp_stack_page) + PAGE_SIZE;
vector_ptr = (unsigned long)kvm_get_hyp_vector();
- __cpu_init_hyp_mode(pgd_ptr, hyp_stack_ptr, vector_ptr);
- __cpu_init_stage2();
+ /*
+ * Call initialization code, and switch to the full blown HYP code.
+ * If the cpucaps haven't been finalized yet, something has gone very
+ * wrong, and hyp will crash and burn when it uses any
+ * cpus_have_const_cap() wrapper.
+ */
+ BUG_ON(!system_capabilities_finalized());
+ __kvm_call_hyp((void *)pgd_ptr, hyp_stack_ptr, vector_ptr, tpidr_el2);
+
+ /*
+ * Disabling SSBD on a non-VHE system requires us to enable SSBS
+ * at EL2.
+ */
+ if (this_cpu_has_cap(ARM64_SSBS) &&
+ arm64_get_ssbd_state() == ARM64_SSBD_FORCE_DISABLE) {
+ kvm_call_hyp(__kvm_enable_ssbs);
+ }
}
static void cpu_hyp_reset(void)
--
2.26.2
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next reply other threads:[~2020-05-15 15:21 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-15 15:20 David Brazdil [this message]
2020-05-25 15:48 ` [PATCH] arm64: kvm: Clean up cpu_init_hyp_mode() Marc Zyngier
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