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vmm_iommu_modify(): split vm_iommu_map()/unmap() into separate functions

Browse source 
Reviewed by:	alc, jhb, markj
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D43140
This commit is contained in:
Konstantin Belousov 2023-12-21 02:00:33 +02:00
parent e774c1ef27
commit 3abc72f871
1 changed files with 45 additions and 37 deletions
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82
sys/amd64/vmm/vmm.c
View file

@ -1037,54 +1037,68 @@ vmm_sysmem_maxaddr(struct vm *vm)
}
static void
vm_iommu_modify(struct vm *vm, bool map)
vm_iommu_map(struct vm *vm)
{
int i, sz;
vm_paddr_t gpa, hpa;
struct mem_map *mm;
void *vp, *cookie, *host_domain;
sz = PAGE_SIZE;
host_domain = iommu_host_domain();
void *vp, *cookie;
int i;
for (i = 0; i < VM_MAX_MEMMAPS; i++) {
mm = &vm->mem_maps[i];
if (!sysmem_mapping(vm, mm))
continue;
if (map) {
KASSERT((mm->flags & VM_MEMMAP_F_IOMMU) == 0,
("iommu map found invalid memmap %#lx/%#lx/%#x",
mm->gpa, mm->len, mm->flags));
if ((mm->flags & VM_MEMMAP_F_WIRED) == 0)
continue;
mm->flags |= VM_MEMMAP_F_IOMMU;
} else {
if ((mm->flags & VM_MEMMAP_F_IOMMU) == 0)
continue;
mm->flags &= ~VM_MEMMAP_F_IOMMU;
KASSERT((mm->flags & VM_MEMMAP_F_WIRED) != 0,
("iommu unmap found invalid memmap %#lx/%#lx/%#x",
mm->gpa, mm->len, mm->flags));
}
KASSERT((mm->flags & VM_MEMMAP_F_IOMMU) == 0,
("iommu map found invalid memmap %#lx/%#lx/%#x",
mm->gpa, mm->len, mm->flags));
if ((mm->flags & VM_MEMMAP_F_WIRED) == 0)
continue;
mm->flags |= VM_MEMMAP_F_IOMMU;
gpa = mm->gpa;
while (gpa < mm->gpa + mm->len) {
for (gpa = mm->gpa; gpa < mm->gpa + mm->len; gpa += PAGE_SIZE) {
vp = vm_gpa_hold_global(vm, gpa, PAGE_SIZE,
VM_PROT_WRITE, &cookie);
KASSERT(vp != NULL, ("vm(%s) could not map gpa %#lx",
vm_name(vm), gpa));
vm_gpa_release(cookie);
hpa = DMAP_TO_PHYS((uintptr_t)vp);
if (map) {
iommu_create_mapping(vm->iommu, gpa, hpa, sz);
} else {
iommu_remove_mapping(vm->iommu, gpa, sz);
}
iommu_create_mapping(vm->iommu, gpa, hpa, PAGE_SIZE);
}
}
gpa += PAGE_SIZE;
iommu_invalidate_tlb(iommu_host_domain());
}
static void
vm_iommu_unmap(struct vm *vm)
{
vm_paddr_t gpa;
struct mem_map *mm;
void *vp, *cookie;
int i;
for (i = 0; i < VM_MAX_MEMMAPS; i++) {
mm = &vm->mem_maps[i];
if (!sysmem_mapping(vm, mm))
continue;
if ((mm->flags & VM_MEMMAP_F_IOMMU) == 0)
continue;
mm->flags &= ~VM_MEMMAP_F_IOMMU;
KASSERT((mm->flags & VM_MEMMAP_F_WIRED) != 0,
("iommu unmap found invalid memmap %#lx/%#lx/%#x",
mm->gpa, mm->len, mm->flags));
for (gpa = mm->gpa; gpa < mm->gpa + mm->len; gpa += PAGE_SIZE) {
vp = vm_gpa_hold_global(vm, gpa, PAGE_SIZE,
VM_PROT_WRITE, &cookie);
KASSERT(vp != NULL, ("vm(%s) could not map gpa %#lx",
vm_name(vm), gpa));
vm_gpa_release(cookie);
iommu_remove_mapping(vm->iommu, gpa, PAGE_SIZE);
}
}
@ -1092,15 +1106,9 @@ vm_iommu_modify(struct vm *vm, bool map)
* Invalidate the cached translations associated with the domain
* from which pages were removed.
*/
if (map)
iommu_invalidate_tlb(host_domain);
else
iommu_invalidate_tlb(vm->iommu);
iommu_invalidate_tlb(vm->iommu);
}
#define vm_iommu_unmap(vm) vm_iommu_modify((vm), false)
#define vm_iommu_map(vm) vm_iommu_modify((vm), true)
int
vm_unassign_pptdev(struct vm *vm, int bus, int slot, int func)
{