From: Marc Zyngier <marc.zyngier@arm.com>
To: linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org,
kvmarm@lists.cs.columbia.edu
Cc: Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>
Subject: [PATCH v2 13/19] KVM: arm/arm64: Keep GICv2 HYP VAs in kvm_vgic_global_state
Date: Mon, 11 Dec 2017 14:49:31 +0000 [thread overview]
Message-ID: <20171211144937.4537-14-marc.zyngier@arm.com> (raw)
In-Reply-To: <20171211144937.4537-1-marc.zyngier@arm.com>
As we're about to change the way we map devices at HYP, we need
to move away from kern_hyp_va on an IO address.
One way of achieving this is to store the VAs in kvm_vgic_global_state,
and use that directly from the HYP code. This requires a small change
to create_hyp_io_mappings so that it can also return a HYP VA.
We take this opportunity to nuke the vctrl_base field in the emulated
distributor, as it is not used anymore.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
arch/arm/include/asm/kvm_mmu.h | 3 ++-
arch/arm64/include/asm/kvm_mmu.h | 3 ++-
include/kvm/arm_vgic.h | 12 ++++++------
virt/kvm/arm/hyp/vgic-v2-sr.c | 10 +++-------
virt/kvm/arm/mmu.c | 20 ++++++++++++++++----
virt/kvm/arm/vgic/vgic-init.c | 6 ------
virt/kvm/arm/vgic/vgic-v2.c | 13 +++++++------
7 files changed, 36 insertions(+), 31 deletions(-)
diff --git a/arch/arm/include/asm/kvm_mmu.h b/arch/arm/include/asm/kvm_mmu.h
index cb3bef71ec9b..feff24b34506 100644
--- a/arch/arm/include/asm/kvm_mmu.h
+++ b/arch/arm/include/asm/kvm_mmu.h
@@ -42,7 +42,8 @@
int create_hyp_mappings(void *from, void *to, pgprot_t prot);
int create_hyp_io_mappings(phys_addr_t phys_addr, size_t size,
- void __iomem **kaddr);
+ void __iomem **kaddr,
+ void __iomem **haddr);
void free_hyp_pgds(void);
void stage2_unmap_vm(struct kvm *kvm);
diff --git a/arch/arm64/include/asm/kvm_mmu.h b/arch/arm64/include/asm/kvm_mmu.h
index 5553c1abf1d5..d30e83df5ccb 100644
--- a/arch/arm64/include/asm/kvm_mmu.h
+++ b/arch/arm64/include/asm/kvm_mmu.h
@@ -119,7 +119,8 @@ static inline unsigned long __kern_hyp_va(unsigned long v)
int create_hyp_mappings(void *from, void *to, pgprot_t prot);
int create_hyp_io_mappings(phys_addr_t phys_addr, size_t size,
- void __iomem **kaddr);
+ void __iomem **kaddr,
+ void __iomem **haddr);
void free_hyp_pgds(void);
void stage2_unmap_vm(struct kvm *kvm);
diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h
index 8c896540a72c..8b3fbc03293b 100644
--- a/include/kvm/arm_vgic.h
+++ b/include/kvm/arm_vgic.h
@@ -57,11 +57,15 @@ struct vgic_global {
/* Physical address of vgic virtual cpu interface */
phys_addr_t vcpu_base;
- /* GICV mapping */
+ /* GICV mapping, kernel VA */
void __iomem *vcpu_base_va;
+ /* GICV mapping, HYP VA */
+ void __iomem *vcpu_hyp_va;
- /* virtual control interface mapping */
+ /* virtual control interface mapping, kernel VA */
void __iomem *vctrl_base;
+ /* virtual control interface mapping, HYP VA */
+ void __iomem *vctrl_hyp;
/* Number of implemented list registers */
int nr_lr;
@@ -198,10 +202,6 @@ struct vgic_dist {
int nr_spis;
- /* TODO: Consider moving to global state */
- /* Virtual control interface mapping */
- void __iomem *vctrl_base;
-
/* base addresses in guest physical address space: */
gpa_t vgic_dist_base; /* distributor */
union {
diff --git a/virt/kvm/arm/hyp/vgic-v2-sr.c b/virt/kvm/arm/hyp/vgic-v2-sr.c
index 19f63fbf3682..a3b224e09f74 100644
--- a/virt/kvm/arm/hyp/vgic-v2-sr.c
+++ b/virt/kvm/arm/hyp/vgic-v2-sr.c
@@ -60,10 +60,8 @@ static void __hyp_text save_lrs(struct kvm_vcpu *vcpu, void __iomem *base)
/* vcpu is already in the HYP VA space */
void __hyp_text __vgic_v2_save_state(struct kvm_vcpu *vcpu)
{
- struct kvm *kvm = kern_hyp_va(vcpu->kvm);
struct vgic_v2_cpu_if *cpu_if = &vcpu->arch.vgic_cpu.vgic_v2;
- struct vgic_dist *vgic = &kvm->arch.vgic;
- void __iomem *base = kern_hyp_va(vgic->vctrl_base);
+ void __iomem *base = hyp_symbol_addr(kvm_vgic_global_state)->vctrl_hyp;
u64 used_lrs = vcpu->arch.vgic_cpu.used_lrs;
if (!base)
@@ -85,10 +83,8 @@ void __hyp_text __vgic_v2_save_state(struct kvm_vcpu *vcpu)
/* vcpu is already in the HYP VA space */
void __hyp_text __vgic_v2_restore_state(struct kvm_vcpu *vcpu)
{
- struct kvm *kvm = kern_hyp_va(vcpu->kvm);
struct vgic_v2_cpu_if *cpu_if = &vcpu->arch.vgic_cpu.vgic_v2;
- struct vgic_dist *vgic = &kvm->arch.vgic;
- void __iomem *base = kern_hyp_va(vgic->vctrl_base);
+ void __iomem *base = hyp_symbol_addr(kvm_vgic_global_state)->vctrl_hyp;
int i;
u64 used_lrs = vcpu->arch.vgic_cpu.used_lrs;
@@ -143,7 +139,7 @@ int __hyp_text __vgic_v2_perform_cpuif_access(struct kvm_vcpu *vcpu)
return -1;
rd = kvm_vcpu_dabt_get_rd(vcpu);
- addr = kern_hyp_va(hyp_symbol_addr(kvm_vgic_global_state)->vcpu_base_va);
+ addr = hyp_symbol_addr(kvm_vgic_global_state)->vcpu_hyp_va;
addr += fault_ipa - vgic->vgic_cpu_base;
if (kvm_vcpu_dabt_iswrite(vcpu)) {
diff --git a/virt/kvm/arm/mmu.c b/virt/kvm/arm/mmu.c
index 38adbe0a016c..6192d45d1e1a 100644
--- a/virt/kvm/arm/mmu.c
+++ b/virt/kvm/arm/mmu.c
@@ -713,28 +713,40 @@ int create_hyp_mappings(void *from, void *to, pgprot_t prot)
* @phys_addr: The physical start address which gets mapped
* @size: Size of the region being mapped
* @kaddr: Kernel VA for this mapping
+ * @haddr: HYP VA for this mapping
*
- * The resulting HYP VA is the same as the kernel VA, modulo
- * HYP_PAGE_OFFSET.
+ * The resulting HYP VA is completely unrelated to the kernel VA.
*/
int create_hyp_io_mappings(phys_addr_t phys_addr, size_t size,
- void __iomem **kaddr)
+ void __iomem **kaddr,
+ void __iomem **haddr)
{
unsigned long start, end;
+ int ret;
*kaddr = ioremap(phys_addr, size);
if (!*kaddr)
return -ENOMEM;
if (is_kernel_in_hyp_mode()) {
+ *haddr = *kaddr;
return 0;
}
start = kern_hyp_va((unsigned long)*kaddr);
end = kern_hyp_va((unsigned long)*kaddr + size);
- return __create_hyp_mappings(hyp_pgd, start, end,
+ ret = __create_hyp_mappings(hyp_pgd, start, end,
__phys_to_pfn(phys_addr), PAGE_HYP_DEVICE);
+
+ if (ret) {
+ iounmap(*kaddr);
+ *kaddr = NULL;
+ } else {
+ *haddr = (void __iomem *)start;
+ }
+
+ return ret;
}
/**
diff --git a/virt/kvm/arm/vgic/vgic-init.c b/virt/kvm/arm/vgic/vgic-init.c
index 62310122ee78..3f01b5975055 100644
--- a/virt/kvm/arm/vgic/vgic-init.c
+++ b/virt/kvm/arm/vgic/vgic-init.c
@@ -166,12 +166,6 @@ int kvm_vgic_create(struct kvm *kvm, u32 type)
kvm->arch.vgic.in_kernel = true;
kvm->arch.vgic.vgic_model = type;
- /*
- * kvm_vgic_global_state.vctrl_base is set on vgic probe (kvm_arch_init)
- * it is stored in distributor struct for asm save/restore purpose
- */
- kvm->arch.vgic.vctrl_base = kvm_vgic_global_state.vctrl_base;
-
kvm->arch.vgic.vgic_dist_base = VGIC_ADDR_UNDEF;
kvm->arch.vgic.vgic_cpu_base = VGIC_ADDR_UNDEF;
kvm->arch.vgic.vgic_redist_base = VGIC_ADDR_UNDEF;
diff --git a/virt/kvm/arm/vgic/vgic-v2.c b/virt/kvm/arm/vgic/vgic-v2.c
index bc49d702f9f0..f0f566e4494e 100644
--- a/virt/kvm/arm/vgic/vgic-v2.c
+++ b/virt/kvm/arm/vgic/vgic-v2.c
@@ -335,7 +335,8 @@ int vgic_v2_probe(const struct gic_kvm_info *info)
ret = create_hyp_io_mappings(info->vcpu.start,
resource_size(&info->vcpu),
- &kvm_vgic_global_state.vcpu_base_va);
+ &kvm_vgic_global_state.vcpu_base_va,
+ &kvm_vgic_global_state.vcpu_hyp_va);
if (ret) {
kvm_err("Cannot map GICV into hyp\n");
goto out;
@@ -346,7 +347,8 @@ int vgic_v2_probe(const struct gic_kvm_info *info)
ret = create_hyp_io_mappings(info->vctrl.start,
resource_size(&info->vctrl),
- &kvm_vgic_global_state.vctrl_base);
+ &kvm_vgic_global_state.vctrl_base,
+ &kvm_vgic_global_state.vctrl_hyp);
if (ret) {
kvm_err("Cannot map VCTRL into hyp\n");
goto out;
@@ -381,15 +383,14 @@ int vgic_v2_probe(const struct gic_kvm_info *info)
void vgic_v2_load(struct kvm_vcpu *vcpu)
{
struct vgic_v2_cpu_if *cpu_if = &vcpu->arch.vgic_cpu.vgic_v2;
- struct vgic_dist *vgic = &vcpu->kvm->arch.vgic;
- writel_relaxed(cpu_if->vgic_vmcr, vgic->vctrl_base + GICH_VMCR);
+ writel_relaxed(cpu_if->vgic_vmcr,
+ 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;
- struct vgic_dist *vgic = &vcpu->kvm->arch.vgic;
- cpu_if->vgic_vmcr = readl_relaxed(vgic->vctrl_base + GICH_VMCR);
+ cpu_if->vgic_vmcr = readl_relaxed(kvm_vgic_global_state.vctrl_base + GICH_VMCR);
}
--
2.14.2
next prev parent reply other threads:[~2017-12-11 14:46 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-11 14:49 [PATCH v2 00/19] KVM/arm64: Randomise EL2 mappings Marc Zyngier
2017-12-11 14:49 ` [PATCH v2 01/19] arm64: asm-offsets: Avoid clashing DMA definitions Marc Zyngier
2017-12-11 15:03 ` Russell King - ARM Linux
2017-12-11 15:22 ` Marc Zyngier
2017-12-11 14:49 ` [PATCH v2 02/19] arm64: asm-offsets: Remove unused definitions Marc Zyngier
2017-12-11 14:49 ` [PATCH v2 03/19] arm64: asm-offsets: Remove potential circular dependency Marc Zyngier
2017-12-11 14:49 ` [PATCH v2 04/19] arm64: alternatives: Enforce alignment of struct alt_instr Marc Zyngier
2017-12-11 14:49 ` [PATCH v2 05/19] arm64: alternatives: Add dynamic patching feature Marc Zyngier
2017-12-13 17:53 ` Catalin Marinas
2017-12-14 12:22 ` Marc Zyngier
2017-12-11 14:49 ` [PATCH v2 06/19] arm64: insn: Add N immediate encoding Marc Zyngier
2017-12-11 14:49 ` [PATCH v2 07/19] arm64: insn: Add encoder for bitwise operations using litterals Marc Zyngier
2017-12-12 18:32 ` James Morse
2017-12-12 23:40 ` Peter Maydell
2017-12-13 14:32 ` Marc Zyngier
2017-12-13 15:45 ` James Morse
2017-12-13 15:52 ` Marc Zyngier
2017-12-14 8:40 ` Marc Zyngier
2017-12-12 18:56 ` Peter Maydell
2017-12-11 14:49 ` [PATCH v2 08/19] arm64: KVM: Dynamically patch the kernel/hyp VA mask Marc Zyngier
2017-12-14 13:17 ` James Morse
2017-12-14 13:27 ` Marc Zyngier
2017-12-11 14:49 ` [PATCH v2 09/19] arm64: cpufeatures: Drop the ARM64_HYP_OFFSET_LOW feature flag Marc Zyngier
2017-12-11 14:49 ` [PATCH v2 10/19] KVM: arm/arm64: Do not use kern_hyp_va() with kvm_vgic_global_state Marc Zyngier
2017-12-11 14:49 ` [PATCH v2 11/19] KVM: arm/arm64: Demote HYP VA range display to being a debug feature Marc Zyngier
2017-12-11 14:49 ` [PATCH v2 12/19] KVM: arm/arm64: Move ioremap calls to create_hyp_io_mappings Marc Zyngier
2017-12-11 14:49 ` Marc Zyngier [this message]
2017-12-11 14:49 ` [PATCH v2 14/19] KVM: arm/arm64: Move HYP IO VAs to the "idmap" range Marc Zyngier
2017-12-11 14:49 ` [PATCH v2 15/19] arm64; insn: Add encoder for the EXTR instruction Marc Zyngier
2017-12-11 14:49 ` [PATCH v2 16/19] arm64: insn: Allow ADD/SUB (immediate) with LSL #12 Marc Zyngier
2017-12-11 14:49 ` [PATCH v2 17/19] arm64: KVM: Dynamically compute the HYP VA mask Marc Zyngier
2017-12-11 14:49 ` [PATCH v2 18/19] arm64: KVM: Introduce EL2 VA randomisation Marc Zyngier
2017-12-11 14:49 ` [PATCH v2 19/19] arm64: Update the KVM memory map documentation Marc Zyngier
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