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FROMLIST: virt: geniezone: Add memory region support

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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.

Change-Id: I53cc0953fd1e3f0aa3c0a91bb5877b2fb297c858
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>
Bug: 280363874
Link: https://lore.kernel.org/lkml/20230727080005.14474-9-yi-de.wu@mediatek.com/
This commit is contained in:
Yi-De Wu 2023-06-01 15:02:33 +08:00 committed by Ramji Jiyani
parent c26057e351
commit 39bd65ec1d
4 changed files with 22 additions and 0 deletions
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2
arch/arm64/geniezone/gzvm_arch_common.h
View File

@ -22,6 +22,7 @@ enum {
GZVM_FUNC_PROBE = 12,
GZVM_FUNC_ENABLE_CAP = 13,
GZVM_FUNC_INFORM_EXIT = 14,
GZVM_FUNC_MEMREGION_PURPOSE = 15,
NR_GZVM_FUNC,
};
@ -44,6 +45,7 @@ enum {
#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_INFORM_EXIT GZVM_HCALL_ID(GZVM_FUNC_INFORM_EXIT)
#define MT_HVC_GZVM_MEMREGION_PURPOSE GZVM_HCALL_ID(GZVM_FUNC_MEMREGION_PURPOSE)
#define GIC_V3_NR_LRS 16

10
arch/arm64/geniezone/vm.c
View File

@ -109,6 +109,16 @@ int gzvm_arch_destroy_vm(u16 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)

7
drivers/virt/geniezone/gzvm_vm.c
View File

@ -234,6 +234,7 @@ static int
gzvm_vm_ioctl_set_memory_region(struct gzvm *gzvm,
struct gzvm_userspace_memory_region *mem)
{
int ret;
struct vm_area_struct *vma;
struct gzvm_memslot *memslot;
unsigned long size;
@ -258,6 +259,12 @@ gzvm_vm_ioctl_set_memory_region(struct gzvm *gzvm,
memslot->vma = vma;
memslot->flags = mem->flags;
memslot->slot_id = mem->slot;
ret = gzvm_arch_memregion_purpose(gzvm, mem);
if (ret) {
pr_err("Failed to config memory region for the specified purpose\n");
return -EFAULT;
}
return register_memslot_addr_range(gzvm, memslot);
}

3
include/linux/gzvm_drv.h
View File

@ -142,6 +142,9 @@ void gzvm_drv_irqfd_exit(void);
int gzvm_vm_irqfd_init(struct gzvm *gzvm);
void gzvm_vm_irqfd_release(struct gzvm *gzvm);
int gzvm_arch_memregion_purpose(struct gzvm *gzvm,
struct gzvm_userspace_memory_region *mem);
int gzvm_init_ioeventfd(struct gzvm *gzvm);
int gzvm_ioeventfd(struct gzvm *gzvm, struct gzvm_ioeventfd *args);
bool gzvm_ioevent_write(struct gzvm_vcpu *vcpu, __u64 addr, int len,