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From: Andrew Scull <ascull@google.com>
To: kvmarm@lists.cs.columbia.edu
Cc: maz@kernel.org, kernel-team@android.com
Subject: [PATCH 12/37] KVM: arm64: nVHE: Fix pointers during SMCCC convertion
Date: Wed, 15 Jul 2020 19:44:13 +0100
Message-ID: <20200715184438.1390996-13-ascull@google.com> (raw)
In-Reply-To: <20200715184438.1390996-1-ascull@google.com>

The host need not concern itself with the pointer differences for the
hyp interfaces that are shared between VHE and nVHE so leave it to the
hyp to handle.

As the SMCCC function IDs are converted into function calls, it is a
suitable place to also convert any pointer arguments into hyp pointers.
This, additionally, eases the reuse of the handlers in different
contexts.

Signed-off-by: Andrew Scull <ascull@google.com>
---
 arch/arm64/kvm/hyp/nvhe/hyp-main.c | 12 ++++++------
 arch/arm64/kvm/hyp/nvhe/switch.c   |  2 --
 arch/arm64/kvm/hyp/nvhe/tlb.c      |  2 --
 arch/arm64/kvm/vgic/vgic-v3.c      |  4 ++--
 4 files changed, 8 insertions(+), 12 deletions(-)

diff --git a/arch/arm64/kvm/hyp/nvhe/hyp-main.c b/arch/arm64/kvm/hyp/nvhe/hyp-main.c
index 4e3634cdfde6..2d621bf5ac3e 100644
--- a/arch/arm64/kvm/hyp/nvhe/hyp-main.c
+++ b/arch/arm64/kvm/hyp/nvhe/hyp-main.c
@@ -27,21 +27,21 @@ static void handle_host_hcall(unsigned long func_id, struct kvm_vcpu *host_vcpu)
 			phys_addr_t ipa = smccc_get_arg2(host_vcpu);
 			int level = smccc_get_arg3(host_vcpu);
 
-			__kvm_tlb_flush_vmid_ipa(mmu, ipa, level);
+			__kvm_tlb_flush_vmid_ipa(kern_hyp_va(mmu), ipa, level);
 			break;
 		}
 	case KVM_HOST_SMCCC_FUNC(__kvm_tlb_flush_vmid): {
 			struct kvm_s2_mmu *mmu =
 				(struct kvm_s2_mmu *)smccc_get_arg1(host_vcpu);
 
-			__kvm_tlb_flush_vmid(mmu);
+			__kvm_tlb_flush_vmid(kern_hyp_va(mmu));
 			break;
 		}
 	case KVM_HOST_SMCCC_FUNC(__kvm_tlb_flush_local_vmid): {
 			struct kvm_s2_mmu *mmu =
 				(struct kvm_s2_mmu *)smccc_get_arg1(host_vcpu);
 
-			__kvm_tlb_flush_local_vmid(mmu);
+			__kvm_tlb_flush_local_vmid(kern_hyp_va(mmu));
 			break;
 		}
 	case KVM_HOST_SMCCC_FUNC(__kvm_timer_set_cntvoff): {
@@ -54,7 +54,7 @@ static void handle_host_hcall(unsigned long func_id, struct kvm_vcpu *host_vcpu)
 			struct kvm_vcpu *vcpu =
 				(struct kvm_vcpu *)smccc_get_arg1(host_vcpu);
 
-			ret = __kvm_vcpu_run(vcpu);
+			ret = __kvm_vcpu_run(kern_hyp_va(vcpu));
 			break;
 		}
 	case KVM_HOST_SMCCC_FUNC(__kvm_enable_ssbs):
@@ -82,14 +82,14 @@ static void handle_host_hcall(unsigned long func_id, struct kvm_vcpu *host_vcpu)
 			struct vgic_v3_cpu_if *cpu_if =
 				(struct vgic_v3_cpu_if *)smccc_get_arg1(host_vcpu);
 
-			__vgic_v3_save_aprs(cpu_if);
+			__vgic_v3_save_aprs(kern_hyp_va(cpu_if));
 			break;
 		}
 	case KVM_HOST_SMCCC_FUNC(__vgic_v3_restore_aprs): {
 			struct vgic_v3_cpu_if *cpu_if =
 				(struct vgic_v3_cpu_if *)smccc_get_arg1(host_vcpu);
 
-			__vgic_v3_restore_aprs(cpu_if);
+			__vgic_v3_restore_aprs(kern_hyp_va(cpu_if));
 			break;
 		}
 	default:
diff --git a/arch/arm64/kvm/hyp/nvhe/switch.c b/arch/arm64/kvm/hyp/nvhe/switch.c
index 99cf90200bf7..d866bff8a142 100644
--- a/arch/arm64/kvm/hyp/nvhe/switch.c
+++ b/arch/arm64/kvm/hyp/nvhe/switch.c
@@ -173,8 +173,6 @@ int __kvm_vcpu_run(struct kvm_vcpu *vcpu)
 		pmr_sync();
 	}
 
-	vcpu = kern_hyp_va(vcpu);
-
 	host_ctxt = &__hyp_this_cpu_ptr(kvm_host_data)->host_ctxt;
 	*__hyp_this_cpu_ptr(kvm_hyp_running_vcpu) = vcpu;
 	guest_ctxt = &vcpu->arch.ctxt;
diff --git a/arch/arm64/kvm/hyp/nvhe/tlb.c b/arch/arm64/kvm/hyp/nvhe/tlb.c
index f31185272b50..e5f65f0da106 100644
--- a/arch/arm64/kvm/hyp/nvhe/tlb.c
+++ b/arch/arm64/kvm/hyp/nvhe/tlb.c
@@ -56,7 +56,6 @@ void __kvm_tlb_flush_vmid_ipa(struct kvm_s2_mmu *mmu,
 	dsb(ishst);
 
 	/* Switch to requested VMID */
-	mmu = kern_hyp_va(mmu);
 	__tlb_switch_to_guest(mmu, &cxt);
 
 	/*
@@ -110,7 +109,6 @@ void __kvm_tlb_flush_vmid(struct kvm_s2_mmu *mmu)
 	dsb(ishst);
 
 	/* Switch to requested VMID */
-	mmu = kern_hyp_va(mmu);
 	__tlb_switch_to_guest(mmu, &cxt);
 
 	__tlbi(vmalls12e1is);
diff --git a/arch/arm64/kvm/vgic/vgic-v3.c b/arch/arm64/kvm/vgic/vgic-v3.c
index 76e2d85789ed..9cdf39a94a63 100644
--- a/arch/arm64/kvm/vgic/vgic-v3.c
+++ b/arch/arm64/kvm/vgic/vgic-v3.c
@@ -662,7 +662,7 @@ void vgic_v3_load(struct kvm_vcpu *vcpu)
 	if (likely(cpu_if->vgic_sre))
 		kvm_call_hyp(__vgic_v3_write_vmcr, cpu_if->vgic_vmcr);
 
-	kvm_call_hyp(__vgic_v3_restore_aprs, kern_hyp_va(cpu_if));
+	kvm_call_hyp(__vgic_v3_restore_aprs, cpu_if);
 
 	if (has_vhe())
 		__vgic_v3_activate_traps(cpu_if);
@@ -686,7 +686,7 @@ void vgic_v3_put(struct kvm_vcpu *vcpu)
 
 	vgic_v3_vmcr_sync(vcpu);
 
-	kvm_call_hyp(__vgic_v3_save_aprs, kern_hyp_va(cpu_if));
+	kvm_call_hyp(__vgic_v3_save_aprs, cpu_if);
 
 	if (has_vhe())
 		__vgic_v3_deactivate_traps(cpu_if);
-- 
2.27.0.389.gc38d7665816-goog

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  parent reply index

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-15 18:44 [PATCH 00/37] Transform the host into a vCPU Andrew Scull
2020-07-15 18:44 ` [PATCH 01/37] smccc: Make constants available to assembly Andrew Scull
2020-07-15 18:44 ` [PATCH 02/37] KVM: arm64: Move clearing of vcpu debug dirty bit Andrew Scull
2020-07-15 18:44 ` [PATCH 03/37] KVM: arm64: Track running vCPU outside of the CPU context Andrew Scull
2020-07-15 18:44 ` [PATCH 04/37] KVM: arm64: nVHE: Pass pointers consistently to hyp-init Andrew Scull
2020-07-15 18:44 ` [PATCH 05/37] KVM: arm64: nVHE: Break out of the hyp-init idmap Andrew Scull
2020-07-15 18:44 ` [PATCH 06/37] KVM: arm64: Only check pending interrupts if it would trap Andrew Scull
2020-07-17 16:21   ` Marc Zyngier
2020-07-15 18:44 ` [PATCH 07/37] KVM: arm64: Separate SError detection from VAXorcism Andrew Scull
2020-07-18  9:00   ` Marc Zyngier
2020-07-20 14:13     ` Andrew Scull
2020-07-20 14:56       ` Marc Zyngier
2020-07-23  0:59         ` FW: " Renters Cancellation Requests
2020-07-20 15:40   ` Andrew Scull
2020-07-20 15:57     ` Marc Zyngier
2020-07-15 18:44 ` [PATCH 08/37] KVM: arm64: nVHE: Introduce a hyp run loop for the host Andrew Scull
2020-07-15 18:44 ` [PATCH 09/37] smccc: Cast arguments to unsigned long Andrew Scull
2020-07-15 18:44 ` [PATCH 10/37] KVM: arm64: nVHE: Migrate hyp interface to SMCCC Andrew Scull
2020-07-15 18:44 ` [PATCH 11/37] KVM: arm64: nVHE: Migrate hyp-init " Andrew Scull
2020-07-15 18:44 ` Andrew Scull [this message]
2020-07-15 18:44 ` [PATCH 13/37] KVM: arm64: Rename workaround 2 helpers Andrew Scull
2020-07-15 18:44 ` [PATCH 14/37] KVM: arm64: nVHE: Use __kvm_vcpu_run for the host vcpu Andrew Scull
2020-07-15 18:44 ` [PATCH 15/37] KVM: arm64: Share some context save and restore macros Andrew Scull
2020-07-15 18:44 ` [PATCH 16/37] KVM: arm64: nVHE: Handle stub HVCs in the host loop Andrew Scull
2020-07-15 18:44 ` [PATCH 17/37] KVM: arm64: nVHE: Store host sysregs in host vcpu Andrew Scull
2020-07-15 18:44 ` [PATCH 18/37] KVM: arm64: nVHE: Access pmu_events directly in kvm_host_data Andrew Scull
2020-07-15 18:44 ` [PATCH 19/37] KVM: arm64: nVHE: Drop host_ctxt argument for context switching Andrew Scull
2020-07-15 18:44 ` [PATCH 20/37] KVM: arm64: nVHE: Use host vcpu context for host debug state Andrew Scull
2020-07-15 18:44 ` [PATCH 21/37] KVM: arm64: Move host debug state from vcpu to percpu Andrew Scull
2020-07-15 18:44 ` [PATCH 22/37] KVM: arm64: nVHE: Store host's mdcr_el2 and hcr_el2 in its vcpu Andrew Scull
2020-07-15 18:44 ` [PATCH 23/37] KVM: arm64: Skip __hyp_panic and go direct to hyp_panic Andrew Scull
2020-07-15 18:44 ` [PATCH 24/37] KVM: arm64: Break apart kvm_host_data Andrew Scull
2020-07-15 18:44 ` [PATCH 25/37] KVM: arm64: nVHE: Unify sysreg state saving paths Andrew Scull
2020-07-15 18:44 ` [PATCH 26/37] KVM: arm64: nVHE: Unify 32-bit sysreg " Andrew Scull
2020-07-15 18:44 ` [PATCH 27/37] KVM: arm64: nVHE: Unify vgic save and restore Andrew Scull
2020-07-15 18:44 ` [PATCH 28/37] KVM: arm64: nVHE: Unify fpexc32 saving paths Andrew Scull
2020-07-15 18:44 ` [PATCH 29/37] KVM: arm64: nVHE: Separate the save and restore of debug state Andrew Scull
2020-07-15 18:44 ` [PATCH 30/37] KVM: arm64: nVHE: Remove MMU assumption in speculative AT workaround Andrew Scull
2020-07-15 18:44 ` [PATCH 31/37] KVM: arm64: Move speculative AT ISBs into context Andrew Scull
2020-07-15 18:44 ` [PATCH 32/37] KVM: arm64: nVHE: Unify sysreg state restoration paths Andrew Scull
2020-07-15 18:44 ` [PATCH 33/37] KVM: arm64: Remove __activate_vm wrapper Andrew Scull
2020-07-15 18:44 ` [PATCH 34/37] KVM: arm64: nVHE: Unify timer restore paths Andrew Scull
2020-07-15 18:44 ` [PATCH 35/37] KVM: arm64: nVHE: Unify PMU event restoration paths Andrew Scull
2020-07-15 18:44 ` [PATCH 36/37] KVM: arm64: nVHE: Unify GIC PMR " Andrew Scull
2020-07-15 18:44 ` [PATCH 37/37] KVM: arm64: Separate save and restore of vcpu trap state Andrew Scull

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