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KVM: selftests: Remove unused kvm_memcmp_hva_gva()

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Remove sefltests' kvm_memcmp_hva_gva(), which has literally never had a
single user since it was introduced by commit 783e9e5126 ("kvm:
selftests: add API testing infrastructure").

Link: https://lore.kernel.org/r/20240802200853.336512-1-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Sean Christopherson 2024-08-02 13:08:53 -07:00
parent d8414067cc
commit ce3b90bd0a
2 changed files with 0 additions and 72 deletions
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2
tools/testing/selftests/kvm/include/kvm_util.h
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@ -428,8 +428,6 @@ const char *vm_guest_mode_string(uint32_t i);
void kvm_vm_free(struct kvm_vm *vmp);
void kvm_vm_restart(struct kvm_vm *vmp);
void kvm_vm_release(struct kvm_vm *vmp);
int kvm_memcmp_hva_gva(void *hva, struct kvm_vm *vm, const vm_vaddr_t gva,
size_t len);
void kvm_vm_elf_load(struct kvm_vm *vm, const char *filename);
int kvm_memfd_alloc(size_t size, bool hugepages);

70
tools/testing/selftests/kvm/lib/kvm_util.c
View File

@ -794,76 +794,6 @@ int kvm_memfd_alloc(size_t size, bool hugepages)
return fd;
}
/*
* Memory Compare, host virtual to guest virtual
*
* Input Args:
* hva - Starting host virtual address
* vm - Virtual Machine
* gva - Starting guest virtual address
* len - number of bytes to compare
*
* Output Args: None
*
* Input/Output Args: None
*
* Return:
* Returns 0 if the bytes starting at hva for a length of len
* are equal the guest virtual bytes starting at gva. Returns
* a value < 0, if bytes at hva are less than those at gva.
* Otherwise a value > 0 is returned.
*
* Compares the bytes starting at the host virtual address hva, for
* a length of len, to the guest bytes starting at the guest virtual
* address given by gva.
*/
int kvm_memcmp_hva_gva(void *hva, struct kvm_vm *vm, vm_vaddr_t gva, size_t len)
{
size_t amt;
/*
* Compare a batch of bytes until either a match is found
* or all the bytes have been compared.
*/
for (uintptr_t offset = 0; offset < len; offset += amt) {
uintptr_t ptr1 = (uintptr_t)hva + offset;
/*
* Determine host address for guest virtual address
* at offset.
*/
uintptr_t ptr2 = (uintptr_t)addr_gva2hva(vm, gva + offset);
/*
* Determine amount to compare on this pass.
* Don't allow the comparsion to cross a page boundary.
*/
amt = len - offset;
if ((ptr1 >> vm->page_shift) != ((ptr1 + amt) >> vm->page_shift))
amt = vm->page_size - (ptr1 % vm->page_size);
if ((ptr2 >> vm->page_shift) != ((ptr2 + amt) >> vm->page_shift))
amt = vm->page_size - (ptr2 % vm->page_size);
assert((ptr1 >> vm->page_shift) == ((ptr1 + amt - 1) >> vm->page_shift));
assert((ptr2 >> vm->page_shift) == ((ptr2 + amt - 1) >> vm->page_shift));
/*
* Perform the comparison. If there is a difference
* return that result to the caller, otherwise need
* to continue on looking for a mismatch.
*/
int ret = memcmp((void *)ptr1, (void *)ptr2, amt);
if (ret != 0)
return ret;
}
/*
* No mismatch found. Let the caller know the two memory
* areas are equal.
*/
return 0;
}
static void vm_userspace_mem_region_gpa_insert(struct rb_root *gpa_tree,
struct userspace_mem_region *region)
{