From: Marc Zyngier <maz@kernel.org>
To: kvmarm@lists.linux.dev, kvm@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Cc: Alexandru Elisei <alexandru.elisei@arm.com>,
Andre Przywara <andre.przywara@arm.com>,
Chase Conklin <chase.conklin@arm.com>,
Christoffer Dall <christoffer.dall@arm.com>,
Ganapatrao Kulkarni <gankulkarni@os.amperecomputing.com>,
Jintack Lim <jintack@cs.columbia.edu>,
Russell King <rmk+kernel@armlinux.org.uk>,
James Morse <james.morse@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Oliver Upton <oliver.upton@linux.dev>,
Zenghui Yu <yuzenghui@huawei.com>
Subject: [PATCH v8 64/69] KVM: arm64: nv: Allocate VNCR page when required
Date: Tue, 31 Jan 2023 09:24:59 +0000 [thread overview]
Message-ID: <20230131092504.2880505-65-maz@kernel.org> (raw)
In-Reply-To: <20230131092504.2880505-1-maz@kernel.org>
If running a NV guest on an ARMv8.4-NV capable system, let's
allocate an additional page that will be used by the hypervisor
to fulfill system register accesses.
Signed-off-by: Marc Zyngier <maz@kernel.org>
---
arch/arm64/kvm/nested.c | 10 ++++++++++
arch/arm64/kvm/reset.c | 1 +
2 files changed, 11 insertions(+)
diff --git a/arch/arm64/kvm/nested.c b/arch/arm64/kvm/nested.c
index f93f4248c6f3..19f07aa8fa68 100644
--- a/arch/arm64/kvm/nested.c
+++ b/arch/arm64/kvm/nested.c
@@ -38,6 +38,14 @@ int kvm_vcpu_init_nested(struct kvm_vcpu *vcpu)
if (!cpus_have_final_cap(ARM64_HAS_NESTED_VIRT))
return -EINVAL;
+ if (cpus_have_final_cap(ARM64_HAS_ENHANCED_NESTED_VIRT)) {
+ if (!vcpu->arch.ctxt.vncr_array)
+ vcpu->arch.ctxt.vncr_array = (u64 *)__get_free_page(GFP_KERNEL | __GFP_ZERO);
+
+ if (!vcpu->arch.ctxt.vncr_array)
+ return -ENOMEM;
+ }
+
mutex_lock(&kvm->lock);
/*
@@ -67,6 +75,8 @@ int kvm_vcpu_init_nested(struct kvm_vcpu *vcpu)
kvm_init_stage2_mmu(kvm, &tmp[num_mmus - 2], 0)) {
kvm_free_stage2_pgd(&tmp[num_mmus - 1]);
kvm_free_stage2_pgd(&tmp[num_mmus - 2]);
+ free_page((unsigned long)vcpu->arch.ctxt.vncr_array);
+ vcpu->arch.ctxt.vncr_array = NULL;
} else {
kvm->arch.nested_mmus_size = num_mmus;
ret = 0;
diff --git a/arch/arm64/kvm/reset.c b/arch/arm64/kvm/reset.c
index 49a3257dec46..8417d2fa0ebd 100644
--- a/arch/arm64/kvm/reset.c
+++ b/arch/arm64/kvm/reset.c
@@ -161,6 +161,7 @@ void kvm_arm_vcpu_destroy(struct kvm_vcpu *vcpu)
if (sve_state)
kvm_unshare_hyp(sve_state, sve_state + vcpu_sve_state_size(vcpu));
kfree(sve_state);
+ free_page((unsigned long)vcpu->arch.ctxt.vncr_array);
kfree(vcpu->arch.ccsidr);
}
--
2.34.1
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next prev parent reply other threads:[~2023-01-31 9:57 UTC|newest]
Thread overview: 85+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-31 9:23 [PATCH v8 00/69] KVM: arm64: ARMv8.3/8.4 Nested Virtualization support Marc Zyngier
2023-01-31 9:23 ` [PATCH v8 01/69] arm64: Add ARM64_HAS_NESTED_VIRT cpufeature Marc Zyngier
2023-01-31 12:03 ` Catalin Marinas
2023-01-31 13:21 ` Marc Zyngier
2023-01-31 13:47 ` Suzuki K Poulose
2023-01-31 14:00 ` Marc Zyngier
2023-01-31 17:34 ` Suzuki K Poulose
2023-01-31 20:04 ` Oliver Upton
2023-01-31 21:26 ` Marc Zyngier
2023-01-31 22:01 ` Oliver Upton
2023-01-31 20:44 ` Marc Zyngier
2023-01-31 9:23 ` [PATCH v8 02/69] KVM: arm64: Use the S2 MMU context to iterate over S2 table Marc Zyngier
2023-01-31 9:23 ` [PATCH v8 03/69] KVM: arm64: nv: Introduce nested virtualization VCPU feature Marc Zyngier
2023-01-31 9:23 ` [PATCH v8 04/69] KVM: arm64: nv: Reset VCPU to EL2 registers if VCPU nested virt is set Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 05/69] KVM: arm64: nv: Allow userspace to set PSR_MODE_EL2x Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 06/69] KVM: arm64: nv: Add EL2 system registers to vcpu context Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 07/69] KVM: arm64: nv: Add nested virt VCPU primitives for vEL2 VCPU state Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 08/69] KVM: arm64: nv: Handle HCR_EL2.NV system register traps Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 09/69] KVM: arm64: nv: Reset VMPIDR_EL2 and VPIDR_EL2 to sane values Marc Zyngier
2023-01-31 20:17 ` Oliver Upton
2023-01-31 22:04 ` Marc Zyngier
2023-01-31 22:09 ` Oliver Upton
2023-01-31 22:16 ` Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 10/69] KVM: arm64: nv: Support virtual EL2 exceptions Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 11/69] KVM: arm64: nv: Inject HVC exceptions to the virtual EL2 Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 12/69] KVM: arm64: nv: Handle trapped ERET from " Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 13/69] KVM: arm64: nv: Add non-VHE-EL2->EL1 translation helpers Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 14/69] KVM: arm64: nv: Handle virtual EL2 registers in vcpu_read/write_sys_reg() Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 15/69] KVM: arm64: nv: Handle SPSR_EL2 specially Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 16/69] KVM: arm64: nv: Handle HCR_EL2.E2H specially Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 17/69] KVM: arm64: nv: Save/Restore vEL2 sysregs Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 18/69] KVM: arm64: nv: Emulate PSTATE.M for a guest hypervisor Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 19/69] KVM: arm64: nv: Trap EL1 VM register accesses in virtual EL2 Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 20/69] KVM: arm64: nv: Add accessors for SPSR_EL1, ELR_EL1 and VBAR_EL1 from " Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 21/69] KVM: arm64: nv: Trap CPACR_EL1 access in " Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 22/69] KVM: arm64: nv: Handle PSCI call via smc from the guest Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 23/69] KVM: arm64: nv: Respect virtual HCR_EL2.TWX setting Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 24/69] KVM: arm64: nv: Respect virtual CPTR_EL2.{TFP,FPEN} settings Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 25/69] KVM: arm64: nv: Respect the virtual HCR_EL2.NV bit setting Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 26/69] KVM: arm64: nv: Respect virtual HCR_EL2.TVM and TRVM settings Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 27/69] KVM: arm64: nv: Respect the virtual HCR_EL2.NV1 bit setting Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 28/69] KVM: arm64: nv: Allow a sysreg to be hidden from userspace only Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 29/69] KVM: arm64: nv: Emulate EL12 register accesses from the virtual EL2 Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 30/69] KVM: arm64: nv: Forward debug traps to the nested guest Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 31/69] KVM: arm64: nv: Configure HCR_EL2 for nested virtualization Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 32/69] KVM: arm64: nv: Only toggle cache for virtual EL2 when SCTLR_EL2 changes Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 33/69] KVM: arm64: nv: Filter out unsupported features from ID regs Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 34/69] KVM: arm64: nv: Hide RAS from nested guests Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 35/69] KVM: arm64: nv: Support multiple nested Stage-2 mmu structures Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 36/69] KVM: arm64: nv: Implement nested Stage-2 page table walk logic Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 37/69] KVM: arm64: nv: Handle shadow stage 2 page faults Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 38/69] KVM: arm64: nv: Restrict S2 RD/WR permissions to match the guest's Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 39/69] KVM: arm64: nv: Unmap/flush shadow stage 2 page tables Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 40/69] KVM: arm64: nv: Set a handler for the system instruction traps Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 41/69] KVM: arm64: nv: Trap and emulate AT instructions from virtual EL2 Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 42/69] KVM: arm64: nv: Trap and emulate TLBI " Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 43/69] KVM: arm64: nv: Fold guest's HCR_EL2 configuration into the host's Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 44/69] KVM: arm64: nv: arch_timer: Support hyp timer emulation Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 45/69] KVM: arm64: nv: Add handling of EL2-specific timer registers Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 46/69] KVM: arm64: nv: Load timer before the GIC Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 47/69] KVM: arm64: nv: Nested GICv3 Support Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 48/69] KVM: arm64: nv: Don't load the GICv4 context on entering a nested guest Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 49/69] KVM: arm64: nv: vgic: Emulate the HW bit in software Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 50/69] KVM: arm64: nv: vgic: Allow userland to set VGIC maintenance IRQ Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 51/69] KVM: arm64: nv: Implement maintenance interrupt forwarding Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 52/69] KVM: arm64: nv: Deal with broken VGIC on maintenance interrupt delivery Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 53/69] KVM: arm64: nv: Add nested GICv3 tracepoints Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 54/69] KVM: arm64: nv: Allow userspace to request KVM_ARM_VCPU_NESTED_VIRT Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 55/69] KVM: arm64: nv: Add handling of FEAT_TTL TLB invalidation Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 56/69] KVM: arm64: nv: Invalidate TLBs based on shadow S2 TTL-like information Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 57/69] KVM: arm64: nv: Tag shadow S2 entries with nested level Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 58/69] KVM: arm64: nv: Add include containing the VNCR_EL2 offsets Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 59/69] KVM: arm64: nv: Map VNCR-capable registers to a separate page Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 60/69] KVM: arm64: nv: Move nested vgic state into the sysreg file Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 61/69] KVM: arm64: Add FEAT_NV2 cpu feature Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 62/69] KVM: arm64: nv: Sync nested timer state with FEAT_NV2 Marc Zyngier
2023-01-31 9:24 ` [PATCH v8 63/69] KVM: arm64: nv: Publish emulated timer interrupt state in the in-memory state Marc Zyngier
2023-01-31 9:24 ` Marc Zyngier [this message]
2023-01-31 9:25 ` [PATCH v8 65/69] KVM: arm64: nv: Enable ARMv8.4-NV support Marc Zyngier
2023-01-31 9:25 ` [PATCH v8 66/69] KVM: arm64: nv: Fast-track 'InHost' exception returns Marc Zyngier
2023-01-31 9:25 ` [PATCH v8 67/69] KVM: arm64: nv: Fast-track EL1 TLBIs for VHE guests Marc Zyngier
2023-01-31 9:25 ` [PATCH v8 68/69] KVM: arm64: nv: Use FEAT_ECV to trap access to EL0 timers Marc Zyngier
2023-01-31 9:25 ` [PATCH v8 69/69] KVM: arm64: nv: Accelerate EL0 timer read accesses when FEAT_ECV is on Marc Zyngier
2023-01-31 22:13 ` [PATCH v8 00/69] KVM: arm64: ARMv8.3/8.4 Nested Virtualization support Oliver Upton
2023-01-31 22:20 ` Marc Zyngier
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