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.
Acked-by: Catalin Marinas <catalin.marinas@xxxxxxx>
Reviewed-by: Christoffer Dall <christoffer.dall@xxxxxxxxxx>
Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx>
---
arch/arm/include/asm/kvm_mmu.h | 3 ++-
arch/arm64/include/asm/kvm_mmu.h | 3 ++-
arch/arm64/kvm/hyp/vgic-v2-cpuif-proxy.c | 2 +-
include/kvm/arm_vgic.h | 12 ++++++------
virt/kvm/arm/mmu.c | 20 +++++++++++++++-----
virt/kvm/arm/vgic/vgic-init.c | 6 ------
virt/kvm/arm/vgic/vgic-v2.c | 26 ++++++++++++--------------
7 files changed, 38 insertions(+), 34 deletions(-)
diff --git a/arch/arm/include/asm/kvm_mmu.h b/arch/arm/include/asm/kvm_mmu.h
index bf17ad83d2f0..4c5c8a386baf 100644
--- a/arch/arm/include/asm/kvm_mmu.h
+++ b/arch/arm/include/asm/kvm_mmu.h
@@ -51,7 +51,8 @@
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 8d5f9934d819..3836641dd6f0 100644
--- a/arch/arm64/include/asm/kvm_mmu.h
+++ b/arch/arm64/include/asm/kvm_mmu.h
@@ -141,7 +141,8 @@ 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/arch/arm64/kvm/hyp/vgic-v2-cpuif-proxy.c b/arch/arm64/kvm/hyp/vgic-v2-cpuif-proxy.c
index 10eb2e96b3e6..86801b6055d6 100644
--- a/arch/arm64/kvm/hyp/vgic-v2-cpuif-proxy.c
+++ b/arch/arm64/kvm/hyp/vgic-v2-cpuif-proxy.c
@@ -60,7 +60,7 @@ 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/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h
index ac98ae46bfb7..87d2ad0a4292 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;
@@ -209,10 +213,6 @@ 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/mmu.c b/virt/kvm/arm/mmu.c
index 2bc32bdf932a..52b0ee31ebee 100644
--- a/virt/kvm/arm/mmu.c
+++ b/virt/kvm/arm/mmu.c
@@ -713,28 +713,38 @@ 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
- *
- * The resulting HYP VA is the same as the kernel VA, modulo
- * HYP_PAGE_OFFSET.
+ * @haddr: HYP VA for this mapping
*/
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, PTRS_PER_PGD, start, end,
+ ret = __create_hyp_mappings(hyp_pgd, PTRS_PER_PGD, start, end,
__phys_to_pfn(phys_addr), PAGE_HYP_DEVICE);
+
+ if (ret) {
+ iounmap(*kaddr);
+ *kaddr = NULL;
+ return ret;
+ }
+
+ *haddr = (void __iomem *)start;
+ return 0;
}
/**
diff --git a/virt/kvm/arm/vgic/vgic-init.c b/virt/kvm/arm/vgic/vgic-init.c
index 3e8209a07585..68378fe17a0e 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 66532f2f0e40..96e144f9d93d 100644
--- a/virt/kvm/arm/vgic/vgic-v2.c
+++ b/virt/kvm/arm/vgic/vgic-v2.c
@@ -363,7 +363,8 @@ 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;
@@ -374,7 +375,8 @@ 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;
@@ -429,9 +431,7 @@ static void save_lrs(struct kvm_vcpu *vcpu, void __iomem *base)
void vgic_v2_save_state(struct kvm_vcpu *vcpu)
{
- struct kvm *kvm = vcpu->kvm;
- struct vgic_dist *vgic = &kvm->arch.vgic;
- void __iomem *base = vgic->vctrl_base;
+ void __iomem *base = kvm_vgic_global_state.vctrl_base;
u64 used_lrs = vcpu->arch.vgic_cpu.used_lrs;
if (!base)
@@ -445,10 +445,8 @@ void vgic_v2_save_state(struct kvm_vcpu *vcpu)
void vgic_v2_restore_state(struct kvm_vcpu *vcpu)
{
- struct kvm *kvm = vcpu->kvm;
- struct vgic_dist *vgic = &kvm->arch.vgic;
struct vgic_v2_cpu_if *cpu_if = &vcpu->arch.vgic_cpu.vgic_v2;
- void __iomem *base = vgic->vctrl_base;
+ void __iomem *base = kvm_vgic_global_state.vctrl_base;
u64 used_lrs = vcpu->arch.vgic_cpu.used_lrs;
int i;
@@ -467,17 +465,17 @@ void vgic_v2_restore_state(struct kvm_vcpu *vcpu)
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_apr, vgic->vctrl_base + GICH_APR);
+ writel_relaxed(cpu_if->vgic_vmcr,
+ kvm_vgic_global_state.vctrl_base + GICH_VMCR);
+ writel_relaxed(cpu_if->vgic_apr,
+ kvm_vgic_global_state.vctrl_base + GICH_APR);
}
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_apr = readl_relaxed(vgic->vctrl_base + GICH_APR);
+ 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);
}
--
2.14.2
