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From: Marc Zyngier <maz@kernel.org>
To: linux-arm-kernel@lists.infradead.org,
	kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org
Cc: Andre Przywara <andre.przywara@arm.com>,
	Dave Martin <Dave.Martin@arm.com>
Subject: [PATCH v2 69/94] arm64: KVM: Use TTL hint in when invalidating stage-2 translations
Date: Tue, 11 Feb 2020 17:49:13 +0000
Message-ID: <20200211174938.27809-70-maz@kernel.org> (raw)
In-Reply-To: <20200211174938.27809-1-maz@kernel.org>

Since we always have a precide idea of the level we're dealing with
when invalidating TLBs, we can provide it to as a hint to our
invalidation helper.

Signed-off-by: Marc Zyngier <maz@kernel.org>
---
 arch/arm/include/asm/stage2_pgtable.h   |  9 +++++++++
 arch/arm64/include/asm/stage2_pgtable.h |  9 +++++++++
 virt/kvm/arm/mmu.c                      | 27 +++++++++++++------------
 3 files changed, 32 insertions(+), 13 deletions(-)

diff --git a/arch/arm/include/asm/stage2_pgtable.h b/arch/arm/include/asm/stage2_pgtable.h
index aaceec7855ec..d54ad534da20 100644
--- a/arch/arm/include/asm/stage2_pgtable.h
+++ b/arch/arm/include/asm/stage2_pgtable.h
@@ -72,4 +72,13 @@ static inline bool kvm_stage2_has_pmd(struct kvm *kvm)
 	return true;
 }
 
+/*
+ * The ARMv8.4-TTL extension doesn't apply to AArch32, so the below is
+ * only to keep things compiling.
+ */
+#define S2_NO_LEVEL_HINT	0
+#define S2_PUD_LEVEL		S2_NO_LEVEL_HINT
+#define S2_PMD_LEVEL		S2_NO_LEVEL_HINT
+#define S2_PTE_LEVEL		S2_NO_LEVEL_HINT
+
 #endif	/* __ARM_S2_PGTABLE_H_ */
diff --git a/arch/arm64/include/asm/stage2_pgtable.h b/arch/arm64/include/asm/stage2_pgtable.h
index 326aac658b9d..7ed5c1a769a9 100644
--- a/arch/arm64/include/asm/stage2_pgtable.h
+++ b/arch/arm64/include/asm/stage2_pgtable.h
@@ -230,4 +230,13 @@ stage2_pgd_addr_end(struct kvm *kvm, phys_addr_t addr, phys_addr_t end)
 	return (boundary - 1 < end - 1) ? boundary : end;
 }
 
+/*
+ * Level values for the ARMv8.4-TTL extension, mapping PUD/PMD/PTE and
+ * the architectural page-table level.
+ */
+#define S2_NO_LEVEL_HINT	0
+#define S2_PUD_LEVEL		1
+#define S2_PMD_LEVEL		2
+#define S2_PTE_LEVEL		3
+
 #endif	/* __ARM64_S2_PGTABLE_H_ */
diff --git a/virt/kvm/arm/mmu.c b/virt/kvm/arm/mmu.c
index 67752c2a615f..f6ea17f55712 100644
--- a/virt/kvm/arm/mmu.c
+++ b/virt/kvm/arm/mmu.c
@@ -74,9 +74,10 @@ void kvm_flush_remote_tlbs(struct kvm *kvm)
 	}
 }
 
-static void kvm_tlb_flush_vmid_ipa(struct kvm_s2_mmu *mmu, phys_addr_t ipa)
+static void kvm_tlb_flush_vmid_ipa(struct kvm_s2_mmu *mmu, phys_addr_t ipa,
+				   int level)
 {
-	kvm_call_hyp(__kvm_tlb_flush_vmid_ipa, mmu, ipa, 0);
+	kvm_call_hyp(__kvm_tlb_flush_vmid_ipa, mmu, ipa, level);
 }
 
 /*
@@ -118,7 +119,7 @@ static void stage2_dissolve_pmd(struct kvm_s2_mmu *mmu, phys_addr_t addr, pmd_t
 		return;
 
 	pmd_clear(pmd);
-	kvm_tlb_flush_vmid_ipa(mmu, addr);
+	kvm_tlb_flush_vmid_ipa(mmu, addr, S2_PMD_LEVEL);
 	put_page(virt_to_page(pmd));
 }
 
@@ -138,7 +139,7 @@ static void stage2_dissolve_pud(struct kvm_s2_mmu *mmu, phys_addr_t addr, pud_t
 		return;
 
 	stage2_pud_clear(kvm, pudp);
-	kvm_tlb_flush_vmid_ipa(mmu, addr);
+	kvm_tlb_flush_vmid_ipa(mmu, addr, S2_PUD_LEVEL);
 	put_page(virt_to_page(pudp));
 }
 
@@ -180,7 +181,7 @@ static void clear_stage2_pgd_entry(struct kvm_s2_mmu *mmu, pgd_t *pgd, phys_addr
 
 	pud_t *pud_table __maybe_unused = stage2_pud_offset(kvm, pgd, 0UL);
 	stage2_pgd_clear(kvm, pgd);
-	kvm_tlb_flush_vmid_ipa(mmu, addr);
+	kvm_tlb_flush_vmid_ipa(mmu, addr, S2_NO_LEVEL_HINT);
 	stage2_pud_free(kvm, pud_table);
 	put_page(virt_to_page(pgd));
 }
@@ -192,7 +193,7 @@ static void clear_stage2_pud_entry(struct kvm_s2_mmu *mmu, pud_t *pud, phys_addr
 	pmd_t *pmd_table __maybe_unused = stage2_pmd_offset(kvm, pud, 0);
 	VM_BUG_ON(stage2_pud_huge(kvm, *pud));
 	stage2_pud_clear(kvm, pud);
-	kvm_tlb_flush_vmid_ipa(mmu, addr);
+	kvm_tlb_flush_vmid_ipa(mmu, addr, S2_NO_LEVEL_HINT);
 	stage2_pmd_free(kvm, pmd_table);
 	put_page(virt_to_page(pud));
 }
@@ -202,7 +203,7 @@ static void clear_stage2_pmd_entry(struct kvm_s2_mmu *mmu, pmd_t *pmd, phys_addr
 	pte_t *pte_table = pte_offset_kernel(pmd, 0);
 	VM_BUG_ON(pmd_thp_or_huge(*pmd));
 	pmd_clear(pmd);
-	kvm_tlb_flush_vmid_ipa(mmu, addr);
+	kvm_tlb_flush_vmid_ipa(mmu, addr, S2_NO_LEVEL_HINT);
 	free_page((unsigned long)pte_table);
 	put_page(virt_to_page(pmd));
 }
@@ -272,7 +273,7 @@ static void unmap_stage2_ptes(struct kvm_s2_mmu *mmu, pmd_t *pmd,
 			pte_t old_pte = *pte;
 
 			kvm_set_pte(pte, __pte(0));
-			kvm_tlb_flush_vmid_ipa(mmu, addr);
+			kvm_tlb_flush_vmid_ipa(mmu, addr, S2_PTE_LEVEL);
 
 			/* No need to invalidate the cache for device mappings */
 			if (!kvm_is_device_pfn(pte_pfn(old_pte)))
@@ -301,7 +302,7 @@ static void unmap_stage2_pmds(struct kvm_s2_mmu *mmu, pud_t *pud,
 				pmd_t old_pmd = *pmd;
 
 				pmd_clear(pmd);
-				kvm_tlb_flush_vmid_ipa(mmu, addr);
+				kvm_tlb_flush_vmid_ipa(mmu, addr, S2_PMD_LEVEL);
 
 				kvm_flush_dcache_pmd(old_pmd);
 
@@ -331,7 +332,7 @@ static void unmap_stage2_puds(struct kvm_s2_mmu *mmu, pgd_t *pgd,
 				pud_t old_pud = *pud;
 
 				stage2_pud_clear(kvm, pud);
-				kvm_tlb_flush_vmid_ipa(mmu, addr);
+				kvm_tlb_flush_vmid_ipa(mmu, addr, S2_PUD_LEVEL);
 				kvm_flush_dcache_pud(old_pud);
 				put_page(virt_to_page(pud));
 			} else {
@@ -1158,7 +1159,7 @@ static int stage2_set_pmd_huge(struct kvm_s2_mmu *mmu,
 		 */
 		WARN_ON_ONCE(pmd_pfn(old_pmd) != pmd_pfn(*new_pmd));
 		pmd_clear(pmd);
-		kvm_tlb_flush_vmid_ipa(mmu, addr);
+		kvm_tlb_flush_vmid_ipa(mmu, addr, S2_PMD_LEVEL);
 	} else {
 		get_page(virt_to_page(pmd));
 	}
@@ -1200,7 +1201,7 @@ static int stage2_set_pud_huge(struct kvm_s2_mmu *mmu,
 
 		WARN_ON_ONCE(kvm_pud_pfn(old_pud) != kvm_pud_pfn(*new_pudp));
 		stage2_pud_clear(kvm, pudp);
-		kvm_tlb_flush_vmid_ipa(mmu, addr);
+		kvm_tlb_flush_vmid_ipa(mmu, addr, S2_PUD_LEVEL);
 	} else {
 		get_page(virt_to_page(pudp));
 	}
@@ -1349,7 +1350,7 @@ static int stage2_set_pte(struct kvm_s2_mmu *mmu,
 			return 0;
 
 		kvm_set_pte(pte, __pte(0));
-		kvm_tlb_flush_vmid_ipa(mmu, addr);
+		kvm_tlb_flush_vmid_ipa(mmu, addr, S2_PTE_LEVEL);
 	} else {
 		get_page(virt_to_page(pte));
 	}
-- 
2.20.1

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  parent reply index

Thread overview: 104+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-11 17:48 [PATCH v2 00/94] KVM: arm64: ARMv8.3/8.4 Nested Virtualization support Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 01/94] KVM: arm64: Move __load_guest_stage2 to kvm_mmu.h Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 02/94] arm64: Add ARM64_HAS_NESTED_VIRT cpufeature Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 03/94] KVM: arm64: nv: Introduce nested virtualization VCPU feature Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 04/94] KVM: arm64: nv: Reset VCPU to EL2 registers if VCPU nested virt is set Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 05/94] KVM: arm64: nv: Allow userspace to set PSR_MODE_EL2x Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 06/94] KVM: arm64: nv: Add EL2 system registers to vcpu context Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 07/94] KVM: arm64: nv: Reset VMPIDR_EL2 and VPIDR_EL2 to sane values Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 08/94] KVM: arm64: nv: Add nested virt VCPU primitives for vEL2 VCPU state Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 09/94] KVM: arm64: nv: Support virtual EL2 exceptions Marc Zyngier
2020-02-17 12:52   ` Mark Rutland
2020-02-17 13:41     ` Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 10/94] KVM: arm64: nv: Inject HVC exceptions to the virtual EL2 Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 11/94] KVM: arm64: nv: Handle trapped ERET from " Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 12/94] KVM: arm64: nv: Add EL2->EL1 translation helpers Marc Zyngier
2020-02-17 14:56   ` Mark Rutland
2020-02-17 17:43     ` Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 13/94] KVM: arm64: nv: Refactor vcpu_{read,write}_sys_reg Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 14/94] KVM: arm64: nv: Handle virtual EL2 registers in vcpu_read/write_sys_reg() Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 15/94] KVM: arm64: nv: Handle SPSR_EL2 specially Marc Zyngier
2020-02-17 15:04   ` Mark Rutland
2020-02-11 17:48 ` [PATCH v2 16/94] KVM: arm64: nv: Handle HCR_EL2.E2H specially Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 17/94] KVM: arm64: nv: Save/Restore vEL2 sysregs Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 18/94] KVM: arm64: nv: Emulate PSTATE.M for a guest hypervisor Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 19/94] KVM: arm64: nv: Trap EL1 VM register accesses in virtual EL2 Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 20/94] KVM: arm64: nv: Trap SPSR_EL1, ELR_EL1 and VBAR_EL1 from " Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 21/94] KVM: arm64: nv: Trap CPACR_EL1 access in " Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 22/94] KVM: arm64: nv: Handle PSCI call via smc from the guest Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 23/94] KVM: arm64: nv: Respect virtual HCR_EL2.TWX setting Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 24/94] KVM: arm64: nv: Respect virtual CPTR_EL2.{TFP, FPEN} settings Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 25/94] KVM: arm64: nv: Respect the virtual HCR_EL2.NV bit setting Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 26/94] KVM: arm64: nv: Respect virtual HCR_EL2.TVM and TRVM settings Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 27/94] KVM: arm64: nv: Respect the virtual HCR_EL2.NV1 bit setting Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 28/94] KVM: arm64: nv: Emulate EL12 register accesses from the virtual EL2 Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 29/94] KVM: arm64: nv: Forward debug traps to the nested guest Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 30/94] KVM: arm64: nv: Configure HCR_EL2 for nested virtualization Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 31/94] KVM: arm64: nv: Only toggle cache for virtual EL2 when SCTLR_EL2 changes Marc Zyngier
2020-02-17 15:13   ` Mark Rutland
2020-02-11 17:48 ` [PATCH v2 32/94] KVM: arm64: nv: Filter out unsupported features from ID regs Marc Zyngier
2020-02-17 15:17   ` Mark Rutland
2020-02-11 17:48 ` [PATCH v2 33/94] KVM: arm64: nv: Hide RAS from nested guests Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 34/94] KVM: arm64: nv: Use ARMv8.5-GTG to advertise supported Stage-2 page sizes Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 35/94] KVM: arm64: Check advertised Stage-2 page size capability Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 36/94] KVM: arm/arm64: nv: Factor out stage 2 page table data from struct kvm Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 37/94] KVM: arm64: nv: Support multiple nested Stage-2 mmu structures Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 38/94] KVM: arm64: nv: Implement nested Stage-2 page table walk logic Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 39/94] KVM: arm64: nv: Handle shadow stage 2 page faults Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 40/94] KVM: arm64: nv: Unmap/flush shadow stage 2 page tables Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 41/94] KVM: arm64: nv: Move last_vcpu_ran to be per s2 mmu Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 42/94] KVM: arm64: nv: Introduce sys_reg_desc.forward_trap Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 43/94] KVM: arm64: nv: Set a handler for the system instruction traps Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 44/94] KVM: arm64: nv: Trap and emulate AT instructions from virtual EL2 Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 45/94] KVM: arm64: nv: Trap and emulate TLBI " Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 46/94] KVM: arm64: nv: Fold guest's HCR_EL2 configuration into the host's Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 47/94] KVM: arm64: nv: Handle traps for timer _EL02 and _EL2 sysregs accessors Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 48/94] KVM: arm64: nv: arch_timer: Support hyp timer emulation Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 49/94] KVM: arm64: nv: Propagate CNTVOFF_EL2 to the virtual EL1 timer Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 50/94] KVM: arm64: nv: Load timer before the GIC Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 51/94] KVM: arm64: nv: vgic-v3: Take cpu_if pointer directly instead of vcpu Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 52/94] KVM: arm64: nv: Nested GICv3 Support Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 53/94] KVM: arm64: nv: vgic: Emulate the HW bit in software Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 54/94] KVM: arm64: nv: vgic: Allow userland to set VGIC maintenance IRQ Marc Zyngier
2020-02-11 17:48 ` [PATCH v2 55/94] KVM: arm64: nv: Implement maintenance interrupt forwarding Marc Zyngier
2020-02-11 17:49 ` [PATCH v2 56/94] KVM: arm64: nv: Add nested GICv3 tracepoints Marc Zyngier
2020-02-11 17:49 ` [PATCH v2 57/94] arm64: KVM: nv: Add handling of EL2-specific timer registers Marc Zyngier
2020-02-11 17:49 ` [PATCH v2 58/94] arm64: KVM: nv: Honor SCTLR_EL2.SPAN on entering vEL2 Marc Zyngier
2020-02-11 17:49 ` [PATCH v2 59/94] arm64: KVM: nv: Handle SCTLR_EL2 RES0/RES1 bits Marc Zyngier
2020-02-11 17:49 ` [PATCH v2 60/94] arm64: KVM: nv: Restrict S2 RD/WR permissions to match the guest's Marc Zyngier
2020-02-11 17:49 ` [PATCH v2 61/94] arm64: KVM: nv: Allow userspace to request KVM_ARM_VCPU_NESTED_VIRT Marc Zyngier
2020-02-11 17:49 ` [PATCH v2 62/94] arm64: Detect the ARMv8.4 TTL feature Marc Zyngier
2020-02-11 17:49 ` [PATCH v2 63/94] arm64: KVM: nv: Add handling of ARMv8.4-TTL TLB invalidation Marc Zyngier
2020-02-11 17:49 ` [PATCH v2 64/94] arm64: KVM: nv: Invalidate TLBs based on shadow S2 TTL-like information Marc Zyngier
2020-02-11 17:49 ` [PATCH v2 65/94] arm64: KVM: nv: Tag shadow S2 entries with nested level Marc Zyngier
2020-02-11 17:49 ` [PATCH v2 66/94] arm64: Add SW reserved PTE/PMD bits Marc Zyngier
2020-02-11 17:49 ` [PATCH v2 67/94] arm64: Add level-hinted TLB invalidation helper Marc Zyngier
2020-03-25 10:38   ` Zhenyu Ye
2020-03-25 11:28     ` Marc Zyngier
2020-02-11 17:49 ` [PATCH v2 68/94] arm64: KVM: Add a level hint to __kvm_tlb_flush_vmid_ipa Marc Zyngier
2020-02-11 17:49 ` Marc Zyngier [this message]
2020-02-11 17:49 ` [PATCH v2 70/94] arm64: KVM: nv: Add include containing the VNCR_EL2 offsets Marc Zyngier
2020-02-11 17:49 ` [PATCH v2 71/94] KVM: arm64: Introduce accessor for ctxt->sys_reg Marc Zyngier
2020-02-11 17:49 ` [PATCH v2 72/94] KVM: arm64: sysreg: Use ctxt_sys_reg() instead of raw sys_regs access Marc Zyngier
2020-02-11 17:49 ` [PATCH v2 73/94] KVM: arm64: sve: Use __vcpu_sys_reg() " Marc Zyngier
2020-02-11 17:49 ` [PATCH v2 74/94] KVM: arm64: pauth: Use ctxt_sys_reg() " Marc Zyngier
2020-02-11 17:49 ` [PATCH v2 75/94] KVM: arm64: debug: " Marc Zyngier
2020-02-11 17:49 ` [PATCH v2 76/94] KVM: arm64: Add missing reset handlers for PMU emulation Marc Zyngier
2020-02-11 17:49 ` [PATCH v2 77/94] KVM: arm64: nv: Move sysreg reset check to boot time Marc Zyngier
2020-02-11 17:49 ` [PATCH v2 78/94] KVM: arm64: Map VNCR-capable registers to a separate page Marc Zyngier
2020-02-11 17:49 ` [PATCH v2 79/94] KVM: arm64: nv: Move nested vgic state into the sysreg file Marc Zyngier
2020-02-11 17:49 ` [PATCH v2 80/94] KVM: arm64: Use accessors for timer ctl/cval/offset Marc Zyngier
2020-02-11 17:49 ` [PATCH v2 81/94] KVM: arm64: Add VNCR-capable timer accessors for arm64 Marc Zyngier
2020-02-11 17:49 ` [PATCH v2 82/94] KVM: arm64: Make struct kvm_regs userspace-only Marc Zyngier
2020-02-11 17:49 ` [PATCH v2 83/94] KVM: arm64: VNCR-ize ELR_EL1 Marc Zyngier
2020-02-11 17:49 ` [PATCH v2 84/94] KVM: arm64: VNCR-ize SP_EL1 Marc Zyngier
2020-02-11 17:49 ` [PATCH v2 85/94] KVM: arm64: Disintegrate SPSR array Marc Zyngier
2020-02-11 17:49 ` [PATCH v2 86/94] KVM: arm64: aarch32: Use __vcpu_sys_reg() instead of raw sys_regs access Marc Zyngier
2020-02-11 17:49 ` [PATCH v2 87/94] KVM: arm64: VNCR-ize SPSR_EL1 Marc Zyngier
2020-02-11 17:49 ` [PATCH v2 88/94] KVM: arm64: Add ARMv8.4 Enhanced Nested Virt cpufeature Marc Zyngier
2020-02-11 17:49 ` [PATCH v2 89/94] KVM: arm64: nv: Synchronize PSTATE early on exit Marc Zyngier
2020-02-11 17:49 ` [PATCH v2 90/94] KVM: arm64: nv: Sync nested timer state with ARMv8.4 Marc Zyngier
2020-02-11 17:49 ` [PATCH v2 91/94] KVM: arm64: nv: Allocate VNCR page when required Marc Zyngier
2020-02-11 17:49 ` [PATCH v2 92/94] KVM: arm64: nv: Enable ARMv8.4-NV support Marc Zyngier
2020-02-11 17:49 ` [PATCH v2 93/94] KVM: arm64: nv: Fast-track 'InHost' exception returns Marc Zyngier
2020-02-11 17:49 ` [PATCH v2 94/94] KVM: arm64: nv: Fast-track EL1 TLBIs for VHE guests Marc Zyngier

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