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SubjectRe: [PATCH v4 7/9] virt: geniezone: Add memory region support
From
Il 09/06/23 10:52, Yi-De Wu ha scritto:
> From: "Jerry Wang" <ze-yu.wang@mediatek.com>
>
> Hypervisor might need to know the precise purpose of each memory
> region, so that it can provide specific memory protection. We add a new
> uapi to pass address and size of a memory region and its purpose.
>
> Signed-off-by: Jerry Wang <ze-yu.wang@mediatek.com>
> Signed-off-by: Liju-clr Chen <liju-clr.chen@mediatek.com>
> Signed-off-by: Yi-De Wu <yi-de.wu@mediatek.com>
> ---
> arch/arm64/geniezone/gzvm_arch_common.h | 2 ++
> arch/arm64/geniezone/vm.c | 9 +++++++++
> drivers/virt/geniezone/gzvm_vm.c | 1 +
> include/linux/gzvm_drv.h | 2 ++
> 4 files changed, 14 insertions(+)
>
> diff --git a/arch/arm64/geniezone/gzvm_arch_common.h b/arch/arm64/geniezone/gzvm_arch_common.h
> index 5affa28b935a..5cfeb4df84c5 100644
> --- a/arch/arm64/geniezone/gzvm_arch_common.h
> +++ b/arch/arm64/geniezone/gzvm_arch_common.h
> @@ -23,6 +23,7 @@ enum {
> GZVM_FUNC_CREATE_DEVICE,
> GZVM_FUNC_PROBE,
> GZVM_FUNC_ENABLE_CAP,
> + GZVM_FUNC_MEMREGION_PURPOSE,
> NR_GZVM_FUNC
> };
>
> @@ -46,6 +47,7 @@ enum {
> #define MT_HVC_GZVM_CREATE_DEVICE GZVM_HCALL_ID(GZVM_FUNC_CREATE_DEVICE)
> #define MT_HVC_GZVM_PROBE GZVM_HCALL_ID(GZVM_FUNC_PROBE)
> #define MT_HVC_GZVM_ENABLE_CAP GZVM_HCALL_ID(GZVM_FUNC_ENABLE_CAP)
> +#define MT_HVC_GZVM_MEMREGION_PURPOSE GZVM_HCALL_ID(GZVM_FUNC_MEMREGION_PURPOSE)
> #define GIC_V3_NR_LRS 16
>
> /**
> diff --git a/arch/arm64/geniezone/vm.c b/arch/arm64/geniezone/vm.c
> index 9f1f14f71b99..e19a66d6a75d 100644
> --- a/arch/arm64/geniezone/vm.c
> +++ b/arch/arm64/geniezone/vm.c
> @@ -97,6 +97,15 @@ int gzvm_arch_destroy_vm(gzvm_id_t vm_id)
> 0, 0, &res);
> }
>
> +int gzvm_arch_memregion_purpose(struct gzvm *gzvm, struct gzvm_userspace_memory_region *mem)
> +{
> + struct arm_smccc_res res;
> +
> + return gzvm_hypcall_wrapper(MT_HVC_GZVM_MEMREGION_PURPOSE, gzvm->vm_id,
> + mem->guest_phys_addr, mem->memory_size,
> + mem->flags, 0, 0, 0, &res);
> +}
> +
> static int gzvm_vm_arch_enable_cap(struct gzvm *gzvm, struct gzvm_enable_cap *cap,
> struct arm_smccc_res *res)
> {
> diff --git a/drivers/virt/geniezone/gzvm_vm.c b/drivers/virt/geniezone/gzvm_vm.c
> index ba5412acfa7d..3b1cb715ef34 100644
> --- a/drivers/virt/geniezone/gzvm_vm.c
> +++ b/drivers/virt/geniezone/gzvm_vm.c
> @@ -248,6 +248,7 @@ gzvm_vm_ioctl_set_memory_region(struct gzvm *gzvm,
> memslot->vma = vma;
> memslot->flags = mem->flags;
> memslot->slot_id = mem->slot;
> + gzvm_arch_memregion_purpose(gzvm, mem);

ret = gzvm_arch_memregion_purpose(...)
if (ret)
......

> return register_memslot_addr_range(gzvm, memslot);
> }
>

Regards,
Angelo

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