From: Marc Zyngier <maz@kernel.org>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>,
kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org,
Will Deacon <will@kernel.org>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Keqian Zhu <zhukeqian1@huawei.com>,
Christoffer Dall <christoffer.dall@arm.com>,
Jiang Yi <giangyi@amazon.com>, James Morse <james.morse@arm.com>,
Andrew Scull <ascull@google.com>,
Zenghui Yu <yuzenghui@huawei.com>,
Julien Thierry <julien.thierry.kdev@gmail.com>,
David Brazdil <dbrazdil@google.com>,
Alexandru Elisei <alexandru.elisei@arm.com>,
Ard Biesheuvel <ardb@kernel.org>, Fuad Tabba <tabba@google.com>,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH 18/24] KVM: arm64: vgic-v3: Take cpu_if pointer directly instead of vcpu
Date: Fri, 29 May 2020 17:01:15 +0100 [thread overview]
Message-ID: <20200529160121.899083-19-maz@kernel.org> (raw)
In-Reply-To: <20200529160121.899083-1-maz@kernel.org>
From: Christoffer Dall <christoffer.dall@arm.com>
If we move the used_lrs field to the version-specific cpu interface
structure, the following functions only operate on the struct
vgic_v3_cpu_if and not the full vcpu:
__vgic_v3_save_state
__vgic_v3_restore_state
__vgic_v3_activate_traps
__vgic_v3_deactivate_traps
__vgic_v3_save_aprs
__vgic_v3_restore_aprs
This is going to be very useful for nested virt, so move the used_lrs
field and change the prototypes and implementations of these functions to
take the cpu_if parameter directly.
No functional change.
Reviewed-by: James Morse <james.morse@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
---
arch/arm64/include/asm/kvm_hyp.h | 12 ++++++------
arch/arm64/kvm/hyp/switch.c | 8 ++++----
arch/arm64/kvm/hyp/vgic-v3-sr.c | 33 ++++++++++----------------------
arch/arm64/kvm/vgic/vgic-v2.c | 10 +++++-----
arch/arm64/kvm/vgic/vgic-v3.c | 14 ++++++++------
arch/arm64/kvm/vgic/vgic.c | 25 ++++++++++++++++--------
include/kvm/arm_vgic.h | 5 ++++-
7 files changed, 54 insertions(+), 53 deletions(-)
diff --git a/arch/arm64/include/asm/kvm_hyp.h b/arch/arm64/include/asm/kvm_hyp.h
index fe57f60f06a8..4f67b0cdffe8 100644
--- a/arch/arm64/include/asm/kvm_hyp.h
+++ b/arch/arm64/include/asm/kvm_hyp.h
@@ -56,12 +56,12 @@
int __vgic_v2_perform_cpuif_access(struct kvm_vcpu *vcpu);
-void __vgic_v3_save_state(struct kvm_vcpu *vcpu);
-void __vgic_v3_restore_state(struct kvm_vcpu *vcpu);
-void __vgic_v3_activate_traps(struct kvm_vcpu *vcpu);
-void __vgic_v3_deactivate_traps(struct kvm_vcpu *vcpu);
-void __vgic_v3_save_aprs(struct kvm_vcpu *vcpu);
-void __vgic_v3_restore_aprs(struct kvm_vcpu *vcpu);
+void __vgic_v3_save_state(struct vgic_v3_cpu_if *cpu_if);
+void __vgic_v3_restore_state(struct vgic_v3_cpu_if *cpu_if);
+void __vgic_v3_activate_traps(struct vgic_v3_cpu_if *cpu_if);
+void __vgic_v3_deactivate_traps(struct vgic_v3_cpu_if *cpu_if);
+void __vgic_v3_save_aprs(struct vgic_v3_cpu_if *cpu_if);
+void __vgic_v3_restore_aprs(struct vgic_v3_cpu_if *cpu_if);
int __vgic_v3_perform_cpuif_access(struct kvm_vcpu *vcpu);
void __timer_enable_traps(struct kvm_vcpu *vcpu);
diff --git a/arch/arm64/kvm/hyp/switch.c b/arch/arm64/kvm/hyp/switch.c
index 8a1e81a400e0..c07a45643cd4 100644
--- a/arch/arm64/kvm/hyp/switch.c
+++ b/arch/arm64/kvm/hyp/switch.c
@@ -270,8 +270,8 @@ static void __hyp_text __deactivate_vm(struct kvm_vcpu *vcpu)
static void __hyp_text __hyp_vgic_save_state(struct kvm_vcpu *vcpu)
{
if (static_branch_unlikely(&kvm_vgic_global_state.gicv3_cpuif)) {
- __vgic_v3_save_state(vcpu);
- __vgic_v3_deactivate_traps(vcpu);
+ __vgic_v3_save_state(&vcpu->arch.vgic_cpu.vgic_v3);
+ __vgic_v3_deactivate_traps(&vcpu->arch.vgic_cpu.vgic_v3);
}
}
@@ -279,8 +279,8 @@ static void __hyp_text __hyp_vgic_save_state(struct kvm_vcpu *vcpu)
static void __hyp_text __hyp_vgic_restore_state(struct kvm_vcpu *vcpu)
{
if (static_branch_unlikely(&kvm_vgic_global_state.gicv3_cpuif)) {
- __vgic_v3_activate_traps(vcpu);
- __vgic_v3_restore_state(vcpu);
+ __vgic_v3_activate_traps(&vcpu->arch.vgic_cpu.vgic_v3);
+ __vgic_v3_restore_state(&vcpu->arch.vgic_cpu.vgic_v3);
}
}
diff --git a/arch/arm64/kvm/hyp/vgic-v3-sr.c b/arch/arm64/kvm/hyp/vgic-v3-sr.c
index 6b85773e15c4..10ed539835c1 100644
--- a/arch/arm64/kvm/hyp/vgic-v3-sr.c
+++ b/arch/arm64/kvm/hyp/vgic-v3-sr.c
@@ -194,10 +194,9 @@ static u32 __hyp_text __vgic_v3_read_ap1rn(int n)
return val;
}
-void __hyp_text __vgic_v3_save_state(struct kvm_vcpu *vcpu)
+void __hyp_text __vgic_v3_save_state(struct vgic_v3_cpu_if *cpu_if)
{
- struct vgic_v3_cpu_if *cpu_if = &vcpu->arch.vgic_cpu.vgic_v3;
- u64 used_lrs = vcpu->arch.vgic_cpu.used_lrs;
+ u64 used_lrs = cpu_if->used_lrs;
/*
* Make sure stores to the GIC via the memory mapped interface
@@ -230,10 +229,9 @@ void __hyp_text __vgic_v3_save_state(struct kvm_vcpu *vcpu)
}
}
-void __hyp_text __vgic_v3_restore_state(struct kvm_vcpu *vcpu)
+void __hyp_text __vgic_v3_restore_state(struct vgic_v3_cpu_if *cpu_if)
{
- struct vgic_v3_cpu_if *cpu_if = &vcpu->arch.vgic_cpu.vgic_v3;
- u64 used_lrs = vcpu->arch.vgic_cpu.used_lrs;
+ u64 used_lrs = cpu_if->used_lrs;
int i;
if (used_lrs || cpu_if->its_vpe.its_vm) {
@@ -257,10 +255,8 @@ void __hyp_text __vgic_v3_restore_state(struct kvm_vcpu *vcpu)
}
}
-void __hyp_text __vgic_v3_activate_traps(struct kvm_vcpu *vcpu)
+void __hyp_text __vgic_v3_activate_traps(struct vgic_v3_cpu_if *cpu_if)
{
- struct vgic_v3_cpu_if *cpu_if = &vcpu->arch.vgic_cpu.vgic_v3;
-
/*
* VFIQEn is RES1 if ICC_SRE_EL1.SRE is 1. This causes a
* Group0 interrupt (as generated in GICv2 mode) to be
@@ -306,9 +302,8 @@ void __hyp_text __vgic_v3_activate_traps(struct kvm_vcpu *vcpu)
write_gicreg(cpu_if->vgic_hcr, ICH_HCR_EL2);
}
-void __hyp_text __vgic_v3_deactivate_traps(struct kvm_vcpu *vcpu)
+void __hyp_text __vgic_v3_deactivate_traps(struct vgic_v3_cpu_if *cpu_if)
{
- struct vgic_v3_cpu_if *cpu_if = &vcpu->arch.vgic_cpu.vgic_v3;
u64 val;
if (!cpu_if->vgic_sre) {
@@ -333,15 +328,11 @@ void __hyp_text __vgic_v3_deactivate_traps(struct kvm_vcpu *vcpu)
write_gicreg(0, ICH_HCR_EL2);
}
-void __hyp_text __vgic_v3_save_aprs(struct kvm_vcpu *vcpu)
+void __hyp_text __vgic_v3_save_aprs(struct vgic_v3_cpu_if *cpu_if)
{
- struct vgic_v3_cpu_if *cpu_if;
u64 val;
u32 nr_pre_bits;
- vcpu = kern_hyp_va(vcpu);
- cpu_if = &vcpu->arch.vgic_cpu.vgic_v3;
-
val = read_gicreg(ICH_VTR_EL2);
nr_pre_bits = vtr_to_nr_pre_bits(val);
@@ -370,15 +361,11 @@ void __hyp_text __vgic_v3_save_aprs(struct kvm_vcpu *vcpu)
}
}
-void __hyp_text __vgic_v3_restore_aprs(struct kvm_vcpu *vcpu)
+void __hyp_text __vgic_v3_restore_aprs(struct vgic_v3_cpu_if *cpu_if)
{
- struct vgic_v3_cpu_if *cpu_if;
u64 val;
u32 nr_pre_bits;
- vcpu = kern_hyp_va(vcpu);
- cpu_if = &vcpu->arch.vgic_cpu.vgic_v3;
-
val = read_gicreg(ICH_VTR_EL2);
nr_pre_bits = vtr_to_nr_pre_bits(val);
@@ -451,7 +438,7 @@ static int __hyp_text __vgic_v3_highest_priority_lr(struct kvm_vcpu *vcpu,
u32 vmcr,
u64 *lr_val)
{
- unsigned int used_lrs = vcpu->arch.vgic_cpu.used_lrs;
+ unsigned int used_lrs = vcpu->arch.vgic_cpu.vgic_v3.used_lrs;
u8 priority = GICv3_IDLE_PRIORITY;
int i, lr = -1;
@@ -490,7 +477,7 @@ static int __hyp_text __vgic_v3_highest_priority_lr(struct kvm_vcpu *vcpu,
static int __hyp_text __vgic_v3_find_active_lr(struct kvm_vcpu *vcpu,
int intid, u64 *lr_val)
{
- unsigned int used_lrs = vcpu->arch.vgic_cpu.used_lrs;
+ unsigned int used_lrs = vcpu->arch.vgic_cpu.vgic_v3.used_lrs;
int i;
for (i = 0; i < used_lrs; i++) {
diff --git a/arch/arm64/kvm/vgic/vgic-v2.c b/arch/arm64/kvm/vgic/vgic-v2.c
index 621cc168fe3f..ebf53a4e1296 100644
--- a/arch/arm64/kvm/vgic/vgic-v2.c
+++ b/arch/arm64/kvm/vgic/vgic-v2.c
@@ -56,7 +56,7 @@ void vgic_v2_fold_lr_state(struct kvm_vcpu *vcpu)
cpuif->vgic_hcr &= ~GICH_HCR_UIE;
- for (lr = 0; lr < vgic_cpu->used_lrs; lr++) {
+ for (lr = 0; lr < vgic_cpu->vgic_v2.used_lrs; lr++) {
u32 val = cpuif->vgic_lr[lr];
u32 cpuid, intid = val & GICH_LR_VIRTUALID;
struct vgic_irq *irq;
@@ -120,7 +120,7 @@ void vgic_v2_fold_lr_state(struct kvm_vcpu *vcpu)
vgic_put_irq(vcpu->kvm, irq);
}
- vgic_cpu->used_lrs = 0;
+ cpuif->used_lrs = 0;
}
/*
@@ -427,7 +427,7 @@ int vgic_v2_probe(const struct gic_kvm_info *info)
static void save_lrs(struct kvm_vcpu *vcpu, void __iomem *base)
{
struct vgic_v2_cpu_if *cpu_if = &vcpu->arch.vgic_cpu.vgic_v2;
- u64 used_lrs = vcpu->arch.vgic_cpu.used_lrs;
+ u64 used_lrs = cpu_if->used_lrs;
u64 elrsr;
int i;
@@ -448,7 +448,7 @@ static void save_lrs(struct kvm_vcpu *vcpu, void __iomem *base)
void vgic_v2_save_state(struct kvm_vcpu *vcpu)
{
void __iomem *base = kvm_vgic_global_state.vctrl_base;
- u64 used_lrs = vcpu->arch.vgic_cpu.used_lrs;
+ u64 used_lrs = vcpu->arch.vgic_cpu.vgic_v2.used_lrs;
if (!base)
return;
@@ -463,7 +463,7 @@ void vgic_v2_restore_state(struct kvm_vcpu *vcpu)
{
struct vgic_v2_cpu_if *cpu_if = &vcpu->arch.vgic_cpu.vgic_v2;
void __iomem *base = kvm_vgic_global_state.vctrl_base;
- u64 used_lrs = vcpu->arch.vgic_cpu.used_lrs;
+ u64 used_lrs = cpu_if->used_lrs;
int i;
if (!base)
diff --git a/arch/arm64/kvm/vgic/vgic-v3.c b/arch/arm64/kvm/vgic/vgic-v3.c
index 3ccd6d3cb4d3..76e2d85789ed 100644
--- a/arch/arm64/kvm/vgic/vgic-v3.c
+++ b/arch/arm64/kvm/vgic/vgic-v3.c
@@ -39,7 +39,7 @@ void vgic_v3_fold_lr_state(struct kvm_vcpu *vcpu)
cpuif->vgic_hcr &= ~ICH_HCR_UIE;
- for (lr = 0; lr < vgic_cpu->used_lrs; lr++) {
+ for (lr = 0; lr < cpuif->used_lrs; lr++) {
u64 val = cpuif->vgic_lr[lr];
u32 intid, cpuid;
struct vgic_irq *irq;
@@ -111,7 +111,7 @@ void vgic_v3_fold_lr_state(struct kvm_vcpu *vcpu)
vgic_put_irq(vcpu->kvm, irq);
}
- vgic_cpu->used_lrs = 0;
+ cpuif->used_lrs = 0;
}
/* Requires the irq to be locked already */
@@ -662,10 +662,10 @@ 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, vcpu);
+ kvm_call_hyp(__vgic_v3_restore_aprs, kern_hyp_va(cpu_if));
if (has_vhe())
- __vgic_v3_activate_traps(vcpu);
+ __vgic_v3_activate_traps(cpu_if);
WARN_ON(vgic_v4_load(vcpu));
}
@@ -680,12 +680,14 @@ void vgic_v3_vmcr_sync(struct kvm_vcpu *vcpu)
void vgic_v3_put(struct kvm_vcpu *vcpu)
{
+ struct vgic_v3_cpu_if *cpu_if = &vcpu->arch.vgic_cpu.vgic_v3;
+
WARN_ON(vgic_v4_put(vcpu, false));
vgic_v3_vmcr_sync(vcpu);
- kvm_call_hyp(__vgic_v3_save_aprs, vcpu);
+ kvm_call_hyp(__vgic_v3_save_aprs, kern_hyp_va(cpu_if));
if (has_vhe())
- __vgic_v3_deactivate_traps(vcpu);
+ __vgic_v3_deactivate_traps(cpu_if);
}
diff --git a/arch/arm64/kvm/vgic/vgic.c b/arch/arm64/kvm/vgic/vgic.c
index 99b02ca730a8..c3643b7f101b 100644
--- a/arch/arm64/kvm/vgic/vgic.c
+++ b/arch/arm64/kvm/vgic/vgic.c
@@ -786,6 +786,7 @@ static void vgic_flush_lr_state(struct kvm_vcpu *vcpu)
int count;
bool multi_sgi;
u8 prio = 0xff;
+ int i = 0;
lockdep_assert_held(&vgic_cpu->ap_list_lock);
@@ -827,11 +828,14 @@ static void vgic_flush_lr_state(struct kvm_vcpu *vcpu)
}
}
- vcpu->arch.vgic_cpu.used_lrs = count;
-
/* Nuke remaining LRs */
- for ( ; count < kvm_vgic_global_state.nr_lr; count++)
- vgic_clear_lr(vcpu, count);
+ for (i = count ; i < kvm_vgic_global_state.nr_lr; i++)
+ vgic_clear_lr(vcpu, i);
+
+ if (!static_branch_unlikely(&kvm_vgic_global_state.gicv3_cpuif))
+ vcpu->arch.vgic_cpu.vgic_v2.used_lrs = count;
+ else
+ vcpu->arch.vgic_cpu.vgic_v3.used_lrs = count;
}
static inline bool can_access_vgic_from_kernel(void)
@@ -849,13 +853,13 @@ static inline void vgic_save_state(struct kvm_vcpu *vcpu)
if (!static_branch_unlikely(&kvm_vgic_global_state.gicv3_cpuif))
vgic_v2_save_state(vcpu);
else
- __vgic_v3_save_state(vcpu);
+ __vgic_v3_save_state(&vcpu->arch.vgic_cpu.vgic_v3);
}
/* Sync back the hardware VGIC state into our emulation after a guest's run. */
void kvm_vgic_sync_hwstate(struct kvm_vcpu *vcpu)
{
- struct vgic_cpu *vgic_cpu = &vcpu->arch.vgic_cpu;
+ int used_lrs;
/* An empty ap_list_head implies used_lrs == 0 */
if (list_empty(&vcpu->arch.vgic_cpu.ap_list_head))
@@ -864,7 +868,12 @@ void kvm_vgic_sync_hwstate(struct kvm_vcpu *vcpu)
if (can_access_vgic_from_kernel())
vgic_save_state(vcpu);
- if (vgic_cpu->used_lrs)
+ if (!static_branch_unlikely(&kvm_vgic_global_state.gicv3_cpuif))
+ used_lrs = vcpu->arch.vgic_cpu.vgic_v2.used_lrs;
+ else
+ used_lrs = vcpu->arch.vgic_cpu.vgic_v3.used_lrs;
+
+ if (used_lrs)
vgic_fold_lr_state(vcpu);
vgic_prune_ap_list(vcpu);
}
@@ -874,7 +883,7 @@ static inline void vgic_restore_state(struct kvm_vcpu *vcpu)
if (!static_branch_unlikely(&kvm_vgic_global_state.gicv3_cpuif))
vgic_v2_restore_state(vcpu);
else
- __vgic_v3_restore_state(vcpu);
+ __vgic_v3_restore_state(&vcpu->arch.vgic_cpu.vgic_v3);
}
/* Flush our emulation state into the GIC hardware before entering the guest. */
diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h
index 69f4164d6477..a8d8fdcd3723 100644
--- a/include/kvm/arm_vgic.h
+++ b/include/kvm/arm_vgic.h
@@ -274,6 +274,8 @@ struct vgic_v2_cpu_if {
u32 vgic_vmcr;
u32 vgic_apr;
u32 vgic_lr[VGIC_V2_MAX_LRS];
+
+ unsigned int used_lrs;
};
struct vgic_v3_cpu_if {
@@ -291,6 +293,8 @@ struct vgic_v3_cpu_if {
* linking the Linux IRQ subsystem and the ITS together.
*/
struct its_vpe its_vpe;
+
+ unsigned int used_lrs;
};
struct vgic_cpu {
@@ -300,7 +304,6 @@ struct vgic_cpu {
struct vgic_v3_cpu_if vgic_v3;
};
- unsigned int used_lrs;
struct vgic_irq private_irqs[VGIC_NR_PRIVATE_IRQS];
raw_spinlock_t ap_list_lock; /* Protects the ap_list */
--
2.26.2
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next prev parent reply other threads:[~2020-05-29 16:08 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-29 16:00 [GIT PULL] KVM/arm64 updates for Linux 5.8 Marc Zyngier
2020-05-29 16:00 ` [PATCH 01/24] KVM: arm64: Move virt/kvm/arm to arch/arm64 Marc Zyngier
2020-05-29 16:00 ` [PATCH 02/24] KVM: arm64: Kill off CONFIG_KVM_ARM_HOST Marc Zyngier
2020-05-29 16:01 ` [PATCH 03/24] KVM: arm64: Update help text Marc Zyngier
2020-05-29 16:01 ` [PATCH 04/24] KVM: arm64: Change CONFIG_KVM to a menuconfig entry Marc Zyngier
2020-05-29 16:01 ` [PATCH 05/24] KVM: arm64: Clean up kvm makefiles Marc Zyngier
2020-05-29 16:01 ` [PATCH 06/24] KVM: arm64: Simplify __kvm_timer_set_cntvoff implementation Marc Zyngier
2020-05-29 16:01 ` [PATCH 07/24] KVM: arm64: Use cpus_have_final_cap for has_vhe() Marc Zyngier
2020-05-29 16:01 ` [PATCH 08/24] KVM: Fix spelling in code comments Marc Zyngier
2020-05-29 16:01 ` [PATCH 09/24] KVM: arm64: Sidestep stage2_unmap_vm() on vcpu reset when S2FWB is supported Marc Zyngier
2020-05-29 16:01 ` [PATCH 10/24] KVM: arm/arm64: Release kvm->mmu_lock in loop to prevent starvation Marc Zyngier
2020-05-29 16:01 ` [PATCH 11/24] KVM: arm64: Clean up the checking for huge mapping Marc Zyngier
2020-05-29 16:01 ` [PATCH 12/24] KVM: arm64: Unify handling THP backed host memory Marc Zyngier
2020-05-29 16:01 ` [PATCH 13/24] KVM: arm64: Support enabling dirty log gradually in small chunks Marc Zyngier
2020-05-29 16:01 ` [PATCH 14/24] KVM: arm64: Make KVM_CAP_MAX_VCPUS compatible with the selected GIC version Marc Zyngier
2020-05-29 16:01 ` [PATCH 15/24] KVM: arm64: Clean up cpu_init_hyp_mode() Marc Zyngier
2020-05-29 16:01 ` [PATCH 16/24] KVM: arm64: Fix incorrect comment on kvm_get_hyp_vector() Marc Zyngier
2020-05-29 16:01 ` [PATCH 17/24] KVM: arm64: Remove obsolete kvm_virt_to_phys abstraction Marc Zyngier
2020-05-29 16:01 ` Marc Zyngier [this message]
2020-05-29 16:01 ` [PATCH 19/24] KVM: arm64: Refactor vcpu_{read,write}_sys_reg Marc Zyngier
2020-05-29 16:01 ` [PATCH 20/24] KVM: arm64: Add missing reset handlers for PMU emulation Marc Zyngier
2020-05-29 16:01 ` [PATCH 21/24] KVM: arm64: Move sysreg reset check to boot time Marc Zyngier
2020-05-29 16:01 ` [PATCH 22/24] KVM: arm64: Don't use empty structures as CPU reset state Marc Zyngier
2020-05-29 16:01 ` [PATCH 23/24] KVM: arm64: Parametrize exception entry with a target EL Marc Zyngier
2020-05-29 16:01 ` [PATCH 24/24] KVM: arm64: Drop obsolete comment about sys_reg ordering Marc Zyngier
2020-06-01 8:27 ` [GIT PULL] KVM/arm64 updates for Linux 5.8 Paolo Bonzini
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