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author | Ingo Molnar <mingo@kernel.org> | 2019-12-10 10:08:09 +0100 |
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committer | Ingo Molnar <mingo@kernel.org> | 2019-12-10 10:12:55 +0100 |
commit | f9b57cf80c8b585614ba223732be0d8f19d558d8 (patch) | |
tree | ab630d0ae380c9a9d09da746086a8e811b563174 /arch/x86/mm/pageattr-test.c | |
parent | d891b9219d2a73640d2f2a216ecb6fb29d832013 (diff) | |
download | linux-next-f9b57cf80c8b585614ba223732be0d8f19d558d8.tar.gz |
x86/mm/pat: Move the memtype related files to arch/x86/mm/pat/
- pat.c offers, dominantly, the memtype APIs - so rename it to memtype.c.
- pageattr.c is offering, primarily, the set_memory*() page attribute APIs,
which is offered via the <asm/set_memory.h> header: name the .c file
along the same pattern.
I.e. perform these renames, and move them all next to each other in arch/x86/mm/pat/:
pat.c => memtype.c
pat_internal.h => memtype.h
pat_interval.c => memtype_interval.c
pageattr.c => set_memory.c
pageattr-test.c => cpa-test.c
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/mm/pageattr-test.c')
-rw-r--r-- | arch/x86/mm/pageattr-test.c | 278 |
1 files changed, 0 insertions, 278 deletions
diff --git a/arch/x86/mm/pageattr-test.c b/arch/x86/mm/pageattr-test.c deleted file mode 100644 index facce271e8b9..000000000000 --- a/arch/x86/mm/pageattr-test.c +++ /dev/null @@ -1,278 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * self test for change_page_attr. - * - * Clears the a test pte bit on random pages in the direct mapping, - * then reverts and compares page tables forwards and afterwards. - */ -#include <linux/memblock.h> -#include <linux/kthread.h> -#include <linux/random.h> -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/mm.h> -#include <linux/vmalloc.h> - -#include <asm/cacheflush.h> -#include <asm/pgtable.h> -#include <asm/kdebug.h> - -/* - * Only print the results of the first pass: - */ -static __read_mostly int print = 1; - -enum { - NTEST = 3 * 100, - NPAGES = 100, -#ifdef CONFIG_X86_64 - LPS = (1 << PMD_SHIFT), -#elif defined(CONFIG_X86_PAE) - LPS = (1 << PMD_SHIFT), -#else - LPS = (1 << 22), -#endif - GPS = (1<<30) -}; - -#define PAGE_CPA_TEST __pgprot(_PAGE_CPA_TEST) - -static int pte_testbit(pte_t pte) -{ - return pte_flags(pte) & _PAGE_SOFTW1; -} - -struct split_state { - long lpg, gpg, spg, exec; - long min_exec, max_exec; -}; - -static int print_split(struct split_state *s) -{ - long i, expected, missed = 0; - int err = 0; - - s->lpg = s->gpg = s->spg = s->exec = 0; - s->min_exec = ~0UL; - s->max_exec = 0; - for (i = 0; i < max_pfn_mapped; ) { - unsigned long addr = (unsigned long)__va(i << PAGE_SHIFT); - unsigned int level; - pte_t *pte; - - pte = lookup_address(addr, &level); - if (!pte) { - missed++; - i++; - continue; - } - - if (level == PG_LEVEL_1G && sizeof(long) == 8) { - s->gpg++; - i += GPS/PAGE_SIZE; - } else if (level == PG_LEVEL_2M) { - if ((pte_val(*pte) & _PAGE_PRESENT) && !(pte_val(*pte) & _PAGE_PSE)) { - printk(KERN_ERR - "%lx level %d but not PSE %Lx\n", - addr, level, (u64)pte_val(*pte)); - err = 1; - } - s->lpg++; - i += LPS/PAGE_SIZE; - } else { - s->spg++; - i++; - } - if (!(pte_val(*pte) & _PAGE_NX)) { - s->exec++; - if (addr < s->min_exec) - s->min_exec = addr; - if (addr > s->max_exec) - s->max_exec = addr; - } - } - if (print) { - printk(KERN_INFO - " 4k %lu large %lu gb %lu x %lu[%lx-%lx] miss %lu\n", - s->spg, s->lpg, s->gpg, s->exec, - s->min_exec != ~0UL ? s->min_exec : 0, - s->max_exec, missed); - } - - expected = (s->gpg*GPS + s->lpg*LPS)/PAGE_SIZE + s->spg + missed; - if (expected != i) { - printk(KERN_ERR "CPA max_pfn_mapped %lu but expected %lu\n", - max_pfn_mapped, expected); - return 1; - } - return err; -} - -static unsigned long addr[NTEST]; -static unsigned int len[NTEST]; - -static struct page *pages[NPAGES]; -static unsigned long addrs[NPAGES]; - -/* Change the global bit on random pages in the direct mapping */ -static int pageattr_test(void) -{ - struct split_state sa, sb, sc; - unsigned long *bm; - pte_t *pte, pte0; - int failed = 0; - unsigned int level; - int i, k; - int err; - - if (print) - printk(KERN_INFO "CPA self-test:\n"); - - bm = vzalloc((max_pfn_mapped + 7) / 8); - if (!bm) { - printk(KERN_ERR "CPA Cannot vmalloc bitmap\n"); - return -ENOMEM; - } - - failed += print_split(&sa); - - for (i = 0; i < NTEST; i++) { - unsigned long pfn = prandom_u32() % max_pfn_mapped; - - addr[i] = (unsigned long)__va(pfn << PAGE_SHIFT); - len[i] = prandom_u32() % NPAGES; - len[i] = min_t(unsigned long, len[i], max_pfn_mapped - pfn - 1); - - if (len[i] == 0) - len[i] = 1; - - pte = NULL; - pte0 = pfn_pte(0, __pgprot(0)); /* shut gcc up */ - - for (k = 0; k < len[i]; k++) { - pte = lookup_address(addr[i] + k*PAGE_SIZE, &level); - if (!pte || pgprot_val(pte_pgprot(*pte)) == 0 || - !(pte_val(*pte) & _PAGE_PRESENT)) { - addr[i] = 0; - break; - } - if (k == 0) { - pte0 = *pte; - } else { - if (pgprot_val(pte_pgprot(*pte)) != - pgprot_val(pte_pgprot(pte0))) { - len[i] = k; - break; - } - } - if (test_bit(pfn + k, bm)) { - len[i] = k; - break; - } - __set_bit(pfn + k, bm); - addrs[k] = addr[i] + k*PAGE_SIZE; - pages[k] = pfn_to_page(pfn + k); - } - if (!addr[i] || !pte || !k) { - addr[i] = 0; - continue; - } - - switch (i % 3) { - case 0: - err = change_page_attr_set(&addr[i], len[i], PAGE_CPA_TEST, 0); - break; - - case 1: - err = change_page_attr_set(addrs, len[1], PAGE_CPA_TEST, 1); - break; - - case 2: - err = cpa_set_pages_array(pages, len[i], PAGE_CPA_TEST); - break; - } - - - if (err < 0) { - printk(KERN_ERR "CPA %d failed %d\n", i, err); - failed++; - } - - pte = lookup_address(addr[i], &level); - if (!pte || !pte_testbit(*pte) || pte_huge(*pte)) { - printk(KERN_ERR "CPA %lx: bad pte %Lx\n", addr[i], - pte ? (u64)pte_val(*pte) : 0ULL); - failed++; - } - if (level != PG_LEVEL_4K) { - printk(KERN_ERR "CPA %lx: unexpected level %d\n", - addr[i], level); - failed++; - } - - } - vfree(bm); - - failed += print_split(&sb); - - for (i = 0; i < NTEST; i++) { - if (!addr[i]) - continue; - pte = lookup_address(addr[i], &level); - if (!pte) { - printk(KERN_ERR "CPA lookup of %lx failed\n", addr[i]); - failed++; - continue; - } - err = change_page_attr_clear(&addr[i], len[i], PAGE_CPA_TEST, 0); - if (err < 0) { - printk(KERN_ERR "CPA reverting failed: %d\n", err); - failed++; - } - pte = lookup_address(addr[i], &level); - if (!pte || pte_testbit(*pte)) { - printk(KERN_ERR "CPA %lx: bad pte after revert %Lx\n", - addr[i], pte ? (u64)pte_val(*pte) : 0ULL); - failed++; - } - - } - - failed += print_split(&sc); - - if (failed) { - WARN(1, KERN_ERR "NOT PASSED. Please report.\n"); - return -EINVAL; - } else { - if (print) - printk(KERN_INFO "ok.\n"); - } - - return 0; -} - -static int do_pageattr_test(void *__unused) -{ - while (!kthread_should_stop()) { - schedule_timeout_interruptible(HZ*30); - if (pageattr_test() < 0) - break; - if (print) - print--; - } - return 0; -} - -static int start_pageattr_test(void) -{ - struct task_struct *p; - - p = kthread_create(do_pageattr_test, NULL, "pageattr-test"); - if (!IS_ERR(p)) - wake_up_process(p); - else - WARN_ON(1); - - return 0; -} -device_initcall(start_pageattr_test); |