From: Fuad Tabba <tabba@google.com>
To: kvmarm@lists.linux.dev
Cc: maz@kernel.org, will@kernel.org, qperret@google.com,
tabba@google.com, seanjc@google.com, alexandru.elisei@arm.com,
catalin.marinas@arm.com, philmd@linaro.org, james.morse@arm.com,
suzuki.poulose@arm.com, oliver.upton@linux.dev,
mark.rutland@arm.com, broonie@kernel.org, joey.gouly@arm.com,
rananta@google.com, smostafa@google.com
Subject: [PATCH v3 16/31] KVM: arm64: Simplify vgic-v3 hypercalls
Date: Fri, 19 Apr 2024 08:59:26 +0100 [thread overview]
Message-ID: <20240419075941.4085061-17-tabba@google.com> (raw)
In-Reply-To: <20240419075941.4085061-1-tabba@google.com>
From: Marc Zyngier <maz@kernel.org>
Consolidate the GICv3 VMCR accessor hypercalls into the APR save/restore
hypercalls so that all of the EL2 GICv3 state is covered by a single pair
of hypercalls.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Fuad Tabba <tabba@google.com>
---
arch/arm64/include/asm/kvm_asm.h | 8 ++------
arch/arm64/include/asm/kvm_hyp.h | 4 ++--
arch/arm64/kvm/arm.c | 5 ++---
arch/arm64/kvm/hyp/nvhe/hyp-main.c | 24 ++++++------------------
arch/arm64/kvm/hyp/vgic-v3-sr.c | 27 +++++++++++++++++++++++----
arch/arm64/kvm/vgic/vgic-v2.c | 9 +--------
arch/arm64/kvm/vgic/vgic-v3.c | 23 ++---------------------
arch/arm64/kvm/vgic/vgic.c | 11 -----------
arch/arm64/kvm/vgic/vgic.h | 2 --
include/kvm/arm_vgic.h | 1 -
10 files changed, 38 insertions(+), 76 deletions(-)
diff --git a/arch/arm64/include/asm/kvm_asm.h b/arch/arm64/include/asm/kvm_asm.h
index 24b5e6b23417..a6330460d9e5 100644
--- a/arch/arm64/include/asm/kvm_asm.h
+++ b/arch/arm64/include/asm/kvm_asm.h
@@ -73,10 +73,8 @@ enum __kvm_host_smccc_func {
__KVM_HOST_SMCCC_FUNC___kvm_tlb_flush_vmid_range,
__KVM_HOST_SMCCC_FUNC___kvm_flush_cpu_context,
__KVM_HOST_SMCCC_FUNC___kvm_timer_set_cntvoff,
- __KVM_HOST_SMCCC_FUNC___vgic_v3_read_vmcr,
- __KVM_HOST_SMCCC_FUNC___vgic_v3_write_vmcr,
- __KVM_HOST_SMCCC_FUNC___vgic_v3_save_aprs,
- __KVM_HOST_SMCCC_FUNC___vgic_v3_restore_aprs,
+ __KVM_HOST_SMCCC_FUNC___vgic_v3_save_vmcr_aprs,
+ __KVM_HOST_SMCCC_FUNC___vgic_v3_restore_vmcr_aprs,
__KVM_HOST_SMCCC_FUNC___pkvm_vcpu_init_traps,
__KVM_HOST_SMCCC_FUNC___pkvm_init_vm,
__KVM_HOST_SMCCC_FUNC___pkvm_init_vcpu,
@@ -241,8 +239,6 @@ extern int __kvm_vcpu_run(struct kvm_vcpu *vcpu);
extern void __kvm_adjust_pc(struct kvm_vcpu *vcpu);
extern u64 __vgic_v3_get_gic_config(void);
-extern u64 __vgic_v3_read_vmcr(void);
-extern void __vgic_v3_write_vmcr(u32 vmcr);
extern void __vgic_v3_init_lrs(void);
extern u64 __kvm_get_mdcr_el2(void);
diff --git a/arch/arm64/include/asm/kvm_hyp.h b/arch/arm64/include/asm/kvm_hyp.h
index 3e2a1ac0c9bb..3e80464f8953 100644
--- a/arch/arm64/include/asm/kvm_hyp.h
+++ b/arch/arm64/include/asm/kvm_hyp.h
@@ -80,8 +80,8 @@ 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);
+void __vgic_v3_save_vmcr_aprs(struct vgic_v3_cpu_if *cpu_if);
+void __vgic_v3_restore_vmcr_aprs(struct vgic_v3_cpu_if *cpu_if);
int __vgic_v3_perform_cpuif_access(struct kvm_vcpu *vcpu);
#ifdef __KVM_NVHE_HYPERVISOR__
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index 0b5473fbbd08..66301131d5a9 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -784,9 +784,8 @@ void kvm_vcpu_wfi(struct kvm_vcpu *vcpu)
* doorbells to be signalled, should an interrupt become pending.
*/
preempt_disable();
- kvm_vgic_vmcr_sync(vcpu);
vcpu_set_flag(vcpu, IN_WFI);
- vgic_v4_put(vcpu);
+ kvm_vgic_put(vcpu);
preempt_enable();
kvm_vcpu_halt(vcpu);
@@ -794,7 +793,7 @@ void kvm_vcpu_wfi(struct kvm_vcpu *vcpu)
preempt_disable();
vcpu_clear_flag(vcpu, IN_WFI);
- vgic_v4_load(vcpu);
+ kvm_vgic_load(vcpu);
preempt_enable();
}
diff --git a/arch/arm64/kvm/hyp/nvhe/hyp-main.c b/arch/arm64/kvm/hyp/nvhe/hyp-main.c
index 26561c562f7a..d5c48dc98f67 100644
--- a/arch/arm64/kvm/hyp/nvhe/hyp-main.c
+++ b/arch/arm64/kvm/hyp/nvhe/hyp-main.c
@@ -175,16 +175,6 @@ static void handle___vgic_v3_get_gic_config(struct kvm_cpu_context *host_ctxt)
cpu_reg(host_ctxt, 1) = __vgic_v3_get_gic_config();
}
-static void handle___vgic_v3_read_vmcr(struct kvm_cpu_context *host_ctxt)
-{
- cpu_reg(host_ctxt, 1) = __vgic_v3_read_vmcr();
-}
-
-static void handle___vgic_v3_write_vmcr(struct kvm_cpu_context *host_ctxt)
-{
- __vgic_v3_write_vmcr(cpu_reg(host_ctxt, 1));
-}
-
static void handle___vgic_v3_init_lrs(struct kvm_cpu_context *host_ctxt)
{
__vgic_v3_init_lrs();
@@ -195,18 +185,18 @@ static void handle___kvm_get_mdcr_el2(struct kvm_cpu_context *host_ctxt)
cpu_reg(host_ctxt, 1) = __kvm_get_mdcr_el2();
}
-static void handle___vgic_v3_save_aprs(struct kvm_cpu_context *host_ctxt)
+static void handle___vgic_v3_save_vmcr_aprs(struct kvm_cpu_context *host_ctxt)
{
DECLARE_REG(struct vgic_v3_cpu_if *, cpu_if, host_ctxt, 1);
- __vgic_v3_save_aprs(kern_hyp_va(cpu_if));
+ __vgic_v3_save_vmcr_aprs(kern_hyp_va(cpu_if));
}
-static void handle___vgic_v3_restore_aprs(struct kvm_cpu_context *host_ctxt)
+static void handle___vgic_v3_restore_vmcr_aprs(struct kvm_cpu_context *host_ctxt)
{
DECLARE_REG(struct vgic_v3_cpu_if *, cpu_if, host_ctxt, 1);
- __vgic_v3_restore_aprs(kern_hyp_va(cpu_if));
+ __vgic_v3_restore_vmcr_aprs(kern_hyp_va(cpu_if));
}
static void handle___pkvm_init(struct kvm_cpu_context *host_ctxt)
@@ -337,10 +327,8 @@ static const hcall_t host_hcall[] = {
HANDLE_FUNC(__kvm_tlb_flush_vmid_range),
HANDLE_FUNC(__kvm_flush_cpu_context),
HANDLE_FUNC(__kvm_timer_set_cntvoff),
- HANDLE_FUNC(__vgic_v3_read_vmcr),
- HANDLE_FUNC(__vgic_v3_write_vmcr),
- HANDLE_FUNC(__vgic_v3_save_aprs),
- HANDLE_FUNC(__vgic_v3_restore_aprs),
+ HANDLE_FUNC(__vgic_v3_save_vmcr_aprs),
+ HANDLE_FUNC(__vgic_v3_restore_vmcr_aprs),
HANDLE_FUNC(__pkvm_vcpu_init_traps),
HANDLE_FUNC(__pkvm_init_vm),
HANDLE_FUNC(__pkvm_init_vcpu),
diff --git a/arch/arm64/kvm/hyp/vgic-v3-sr.c b/arch/arm64/kvm/hyp/vgic-v3-sr.c
index 6cb638b184b1..7b397fad26f2 100644
--- a/arch/arm64/kvm/hyp/vgic-v3-sr.c
+++ b/arch/arm64/kvm/hyp/vgic-v3-sr.c
@@ -330,7 +330,7 @@ void __vgic_v3_deactivate_traps(struct vgic_v3_cpu_if *cpu_if)
write_gicreg(0, ICH_HCR_EL2);
}
-void __vgic_v3_save_aprs(struct vgic_v3_cpu_if *cpu_if)
+static void __vgic_v3_save_aprs(struct vgic_v3_cpu_if *cpu_if)
{
u64 val;
u32 nr_pre_bits;
@@ -363,7 +363,7 @@ void __vgic_v3_save_aprs(struct vgic_v3_cpu_if *cpu_if)
}
}
-void __vgic_v3_restore_aprs(struct vgic_v3_cpu_if *cpu_if)
+static void __vgic_v3_restore_aprs(struct vgic_v3_cpu_if *cpu_if)
{
u64 val;
u32 nr_pre_bits;
@@ -455,16 +455,35 @@ u64 __vgic_v3_get_gic_config(void)
return val;
}
-u64 __vgic_v3_read_vmcr(void)
+static u64 __vgic_v3_read_vmcr(void)
{
return read_gicreg(ICH_VMCR_EL2);
}
-void __vgic_v3_write_vmcr(u32 vmcr)
+static void __vgic_v3_write_vmcr(u32 vmcr)
{
write_gicreg(vmcr, ICH_VMCR_EL2);
}
+void __vgic_v3_save_vmcr_aprs(struct vgic_v3_cpu_if *cpu_if)
+{
+ __vgic_v3_save_aprs(cpu_if);
+ if (cpu_if->vgic_sre)
+ cpu_if->vgic_vmcr = __vgic_v3_read_vmcr();
+}
+
+void __vgic_v3_restore_vmcr_aprs(struct vgic_v3_cpu_if *cpu_if)
+{
+ /*
+ * If dealing with a GICv2 emulation on GICv3, VMCR_EL2.VFIQen
+ * is dependent on ICC_SRE_EL1.SRE, and we have to perform the
+ * VMCR_EL2 save/restore in the world switch.
+ */
+ if (cpu_if->vgic_sre)
+ __vgic_v3_write_vmcr(cpu_if->vgic_vmcr);
+ __vgic_v3_restore_aprs(cpu_if);
+}
+
static int __vgic_v3_bpr_min(void)
{
/* See Pseudocode for VPriorityGroup */
diff --git a/arch/arm64/kvm/vgic/vgic-v2.c b/arch/arm64/kvm/vgic/vgic-v2.c
index 7e9cdb78f7ce..ae5a44d5702d 100644
--- a/arch/arm64/kvm/vgic/vgic-v2.c
+++ b/arch/arm64/kvm/vgic/vgic-v2.c
@@ -464,17 +464,10 @@ void vgic_v2_load(struct kvm_vcpu *vcpu)
kvm_vgic_global_state.vctrl_base + GICH_APR);
}
-void vgic_v2_vmcr_sync(struct kvm_vcpu *vcpu)
-{
- struct vgic_v2_cpu_if *cpu_if = &vcpu->arch.vgic_cpu.vgic_v2;
-
- cpu_if->vgic_vmcr = readl_relaxed(kvm_vgic_global_state.vctrl_base + GICH_VMCR);
-}
-
void vgic_v2_put(struct kvm_vcpu *vcpu)
{
struct vgic_v2_cpu_if *cpu_if = &vcpu->arch.vgic_cpu.vgic_v2;
- vgic_v2_vmcr_sync(vcpu);
+ cpu_if->vgic_vmcr = readl_relaxed(kvm_vgic_global_state.vctrl_base + GICH_VMCR);
cpu_if->vgic_apr = readl_relaxed(kvm_vgic_global_state.vctrl_base + GICH_APR);
}
diff --git a/arch/arm64/kvm/vgic/vgic-v3.c b/arch/arm64/kvm/vgic/vgic-v3.c
index 4ea3340786b9..ed6e412cd74b 100644
--- a/arch/arm64/kvm/vgic/vgic-v3.c
+++ b/arch/arm64/kvm/vgic/vgic-v3.c
@@ -722,15 +722,7 @@ void vgic_v3_load(struct kvm_vcpu *vcpu)
{
struct vgic_v3_cpu_if *cpu_if = &vcpu->arch.vgic_cpu.vgic_v3;
- /*
- * If dealing with a GICv2 emulation on GICv3, VMCR_EL2.VFIQen
- * is dependent on ICC_SRE_EL1.SRE, and we have to perform the
- * VMCR_EL2 save/restore in the world switch.
- */
- if (likely(cpu_if->vgic_sre))
- kvm_call_hyp(__vgic_v3_write_vmcr, cpu_if->vgic_vmcr);
-
- kvm_call_hyp(__vgic_v3_restore_aprs, cpu_if);
+ kvm_call_hyp(__vgic_v3_restore_vmcr_aprs, cpu_if);
if (has_vhe())
__vgic_v3_activate_traps(cpu_if);
@@ -738,24 +730,13 @@ void vgic_v3_load(struct kvm_vcpu *vcpu)
WARN_ON(vgic_v4_load(vcpu));
}
-void vgic_v3_vmcr_sync(struct kvm_vcpu *vcpu)
-{
- struct vgic_v3_cpu_if *cpu_if = &vcpu->arch.vgic_cpu.vgic_v3;
-
- if (likely(cpu_if->vgic_sre))
- cpu_if->vgic_vmcr = kvm_call_hyp_ret(__vgic_v3_read_vmcr);
-}
-
void vgic_v3_put(struct kvm_vcpu *vcpu)
{
struct vgic_v3_cpu_if *cpu_if = &vcpu->arch.vgic_cpu.vgic_v3;
+ kvm_call_hyp(__vgic_v3_save_vmcr_aprs, cpu_if);
WARN_ON(vgic_v4_put(vcpu));
- vgic_v3_vmcr_sync(vcpu);
-
- kvm_call_hyp(__vgic_v3_save_aprs, cpu_if);
-
if (has_vhe())
__vgic_v3_deactivate_traps(cpu_if);
}
diff --git a/arch/arm64/kvm/vgic/vgic.c b/arch/arm64/kvm/vgic/vgic.c
index 4ec93587c8cd..fcc5747f51e9 100644
--- a/arch/arm64/kvm/vgic/vgic.c
+++ b/arch/arm64/kvm/vgic/vgic.c
@@ -939,17 +939,6 @@ void kvm_vgic_put(struct kvm_vcpu *vcpu)
vgic_v3_put(vcpu);
}
-void kvm_vgic_vmcr_sync(struct kvm_vcpu *vcpu)
-{
- if (unlikely(!irqchip_in_kernel(vcpu->kvm)))
- return;
-
- if (kvm_vgic_global_state.type == VGIC_V2)
- vgic_v2_vmcr_sync(vcpu);
- else
- vgic_v3_vmcr_sync(vcpu);
-}
-
int kvm_vgic_vcpu_pending_irq(struct kvm_vcpu *vcpu)
{
struct vgic_cpu *vgic_cpu = &vcpu->arch.vgic_cpu;
diff --git a/arch/arm64/kvm/vgic/vgic.h b/arch/arm64/kvm/vgic/vgic.h
index 0c2b82de8fa3..4b93528e6a89 100644
--- a/arch/arm64/kvm/vgic/vgic.h
+++ b/arch/arm64/kvm/vgic/vgic.h
@@ -214,7 +214,6 @@ int vgic_register_dist_iodev(struct kvm *kvm, gpa_t dist_base_address,
void vgic_v2_init_lrs(void);
void vgic_v2_load(struct kvm_vcpu *vcpu);
void vgic_v2_put(struct kvm_vcpu *vcpu);
-void vgic_v2_vmcr_sync(struct kvm_vcpu *vcpu);
void vgic_v2_save_state(struct kvm_vcpu *vcpu);
void vgic_v2_restore_state(struct kvm_vcpu *vcpu);
@@ -253,7 +252,6 @@ bool vgic_v3_check_base(struct kvm *kvm);
void vgic_v3_load(struct kvm_vcpu *vcpu);
void vgic_v3_put(struct kvm_vcpu *vcpu);
-void vgic_v3_vmcr_sync(struct kvm_vcpu *vcpu);
bool vgic_has_its(struct kvm *kvm);
int kvm_vgic_register_its_device(void);
diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h
index 47035946648e..0c3cce31e0a2 100644
--- a/include/kvm/arm_vgic.h
+++ b/include/kvm/arm_vgic.h
@@ -388,7 +388,6 @@ int kvm_vgic_vcpu_pending_irq(struct kvm_vcpu *vcpu);
void kvm_vgic_load(struct kvm_vcpu *vcpu);
void kvm_vgic_put(struct kvm_vcpu *vcpu);
-void kvm_vgic_vmcr_sync(struct kvm_vcpu *vcpu);
#define irqchip_in_kernel(k) (!!((k)->arch.vgic.in_kernel))
#define vgic_initialized(k) ((k)->arch.vgic.initialized)
--
2.44.0.769.g3c40516874-goog
next prev parent reply other threads:[~2024-04-19 8:00 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-19 7:59 [PATCH v3 00/31] KVM: arm64: Preamble for pKVM Fuad Tabba
2024-04-19 7:59 ` [PATCH v3 01/31] KVM: arm64: Initialize the kvm host data's fpsimd_state pointer in pKVM Fuad Tabba
2024-04-19 7:59 ` [PATCH v3 02/31] KVM: arm64: Move guest_owns_fp_regs() to increase its scope Fuad Tabba
2024-04-19 7:59 ` [PATCH v3 03/31] KVM: arm64: Refactor checks for FP state ownership Fuad Tabba
2024-04-19 7:59 ` [PATCH v3 04/31] KVM: arm64: Do not re-initialize the KVM lock Fuad Tabba
2024-04-19 7:59 ` [PATCH v3 05/31] KVM: arm64: Issue CMOs when tearing down guest s2 pages Fuad Tabba
2024-04-19 7:59 ` [PATCH v3 06/31] KVM: arm64: Avoid BUG-ing from the host abort path Fuad Tabba
2024-04-19 7:59 ` [PATCH v3 07/31] KVM: arm64: Check for PTE validity when checking for executable/cacheable Fuad Tabba
2024-04-19 7:59 ` [PATCH v3 08/31] KVM: arm64: Avoid BBM when changing only s/w bits in Stage-2 PTE Fuad Tabba
2024-04-19 7:59 ` [PATCH v3 09/31] KVM: arm64: Support TLB invalidation in guest context Fuad Tabba
2024-04-19 20:54 ` Oliver Upton
2024-04-22 8:11 ` Fuad Tabba
2024-04-19 7:59 ` [PATCH v3 10/31] KVM: arm64: Do not map the host fpsimd state to hyp in pKVM Fuad Tabba
2024-04-19 7:59 ` [PATCH v3 11/31] KVM: arm64: Remove locking from EL2 allocation fast-paths Fuad Tabba
2024-04-19 20:42 ` Oliver Upton
2024-04-22 8:09 ` Fuad Tabba
2024-04-19 7:59 ` [PATCH v3 12/31] KVM: arm64: Prevent kmemleak from accessing .hyp.data Fuad Tabba
2024-04-19 7:59 ` [PATCH v3 13/31] KVM: arm64: Fix comment for __pkvm_vcpu_init_traps() Fuad Tabba
2024-04-19 7:59 ` [PATCH v3 14/31] KVM: arm64: Change kvm_handle_mmio_return() return polarity Fuad Tabba
2024-04-19 7:59 ` [PATCH v3 15/31] KVM: arm64: Move setting the page as dirty out of the critical section Fuad Tabba
2024-04-19 7:59 ` Fuad Tabba [this message]
2024-04-19 7:59 ` [PATCH v3 17/31] KVM: arm64: Add is_pkvm_initialized() helper Fuad Tabba
2024-04-19 7:59 ` [PATCH v3 18/31] KVM: arm64: Introduce and use predicates that check for protected VMs Fuad Tabba
2024-04-19 7:59 ` [PATCH v3 19/31] KVM: arm64: Move pstate reset value definitions to kvm_arm.h Fuad Tabba
2024-04-19 7:59 ` [PATCH v3 20/31] KVM: arm64: Clarify rationale for ZCR_EL1 value restored on guest exit Fuad Tabba
2024-04-19 7:59 ` [PATCH v3 21/31] KVM: arm64: Refactor calculating SVE state size to use helpers Fuad Tabba
2024-04-19 7:59 ` [PATCH v3 22/31] KVM: arm64: Move some kvm_psci functions to a shared header Fuad Tabba
2024-04-19 7:59 ` [PATCH v3 23/31] KVM: arm64: Refactor reset_mpidr() to extract its computation Fuad Tabba
2024-04-19 7:59 ` [PATCH v3 24/31] KVM: arm64: Refactor kvm_vcpu_enable_ptrauth() for hyp use Fuad Tabba
2024-04-19 7:59 ` [PATCH v3 25/31] KVM: arm64: Introduce hyp_rwlock_t Fuad Tabba
2024-04-19 7:59 ` [PATCH v3 26/31] KVM: arm64: Add atomics-based checking refcount implementation at EL2 Fuad Tabba
2024-04-19 7:59 ` [PATCH v3 27/31] KVM: arm64: Use atomic refcount helpers for 'struct hyp_page::refcount' Fuad Tabba
2024-04-19 20:52 ` Oliver Upton
2024-04-22 8:10 ` Fuad Tabba
2024-04-22 13:08 ` Fuad Tabba
2024-04-22 20:46 ` Oliver Upton
2024-04-22 23:44 ` Will Deacon
2024-04-23 1:15 ` Oliver Upton
2024-04-19 7:59 ` [PATCH v3 28/31] KVM: arm64: Reformat/beautify PTP hypercall documentation Fuad Tabba
2024-04-19 7:59 ` [PATCH v3 29/31] KVM: arm64: Rename firmware pseudo-register documentation file Fuad Tabba
2024-04-19 7:59 ` [PATCH v3 30/31] KVM: arm64: Document the KVM/arm64-specific calls in hypercalls.rst Fuad Tabba
2024-04-19 7:59 ` [PATCH v3 31/31] KVM: arm64: Force injection of a data abort on NISV MMIO exit Fuad Tabba
2024-04-19 20:28 ` Oliver Upton
2024-04-22 8:07 ` Fuad Tabba
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