blob: 988c26ef5e5b3737195b2668feb855d1a51236af [file] [log] [blame]
/*
* Copyright 2019 The Hafnium Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "hf/arch/vm/mm.h"
#include "hftest.h"
/* Number of pages reserved for page tables. Increase if necessary. */
#define PTABLE_PAGES 3
alignas(alignof(struct mm_page_table)) static char ptable_buf
[sizeof(struct mm_page_table) * PTABLE_PAGES];
static struct mpool ppool;
static struct mm_ptable ptable;
static struct mm_stage1_locked get_stage1_locked(void)
{
return (struct mm_stage1_locked){.ptable = &ptable};
}
bool hftest_mm_init(void)
{
struct mm_stage1_locked stage1_locked;
mpool_init(&ppool, sizeof(struct mm_page_table));
if (!mpool_add_chunk(&ppool, ptable_buf, sizeof(ptable_buf))) {
HFTEST_FAIL(true, "Failed to add buffer to page-table pool.");
}
if (!mm_ptable_init(&ptable, MM_FLAG_STAGE1, &ppool)) {
HFTEST_FAIL(true, "Unable to allocate memory for page table.");
}
stage1_locked = get_stage1_locked();
mm_identity_map(stage1_locked, pa_init(0),
pa_init(mm_ptable_addr_space_end(MM_FLAG_STAGE1)),
MM_MODE_R | MM_MODE_W | MM_MODE_X, &ppool);
if (!arch_vm_mm_init()) {
return false;
}
arch_vm_mm_enable(ptable.root);
return true;
}
void hftest_mm_identity_map(const void *base, size_t size, int mode)
{
struct mm_stage1_locked stage1_locked = get_stage1_locked();
paddr_t start = pa_from_va(va_from_ptr(base));
paddr_t end = pa_add(start, size);
if (mm_identity_map(stage1_locked, start, end, mode, &ppool) != base) {
FAIL("Could not add new page table mapping. Try increasing "
"size of the page table buffer.");
}
}
void hftest_mm_vcpu_init(void)
{
arch_vm_mm_enable(ptable.root);
}