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authorMarc Zyngier <marc.zyngier@arm.com>2017-12-04 16:43:23 +0000
committerMarc Zyngier <marc.zyngier@arm.com>2018-03-19 13:04:06 +0000
commit1bb32a44aea1fe73c6f84e466a45ae559ef74559 (patch)
treebde48ef72be891a56a9b61fbf658f6f1627e3064 /virt
parent807a378425d27d377fdf181d1dba91539bac9294 (diff)
downloadlinux-1bb32a44aea1fe73c6f84e466a45ae559ef74559.tar.bz2
KVM: arm/arm64: Keep GICv2 HYP VAs in kvm_vgic_global_state
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@arm.com> Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'virt')
-rw-r--r--virt/kvm/arm/mmu.c20
-rw-r--r--virt/kvm/arm/vgic/vgic-init.c6
-rw-r--r--virt/kvm/arm/vgic/vgic-v2.c26
3 files changed, 27 insertions, 25 deletions
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);
}