Port subr_physmem to userspace and add tests
These give us some confidience we haven't broken anything in early boot code that may be running before the console. Reviewed by: emaste Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D34691
This commit is contained in:
Andrew Turner
parent
3532bcd282
commit
8c99dfed54
@ -29,8 +29,10 @@
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#ifdef _KERNEL
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#include "opt_acpi.h"
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#include "opt_ddb.h"
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#endif
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/*
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* Routines for describing and initializing anything related to physical memory.
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@ -40,12 +42,19 @@ __FBSDID("$FreeBSD$");
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/physmem.h>
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#ifdef _KERNEL
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#include <vm/vm.h>
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#include <vm/vm_param.h>
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#include <vm/vm_page.h>
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#include <vm/vm_phys.h>
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#include <vm/vm_dumpset.h>
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#include <machine/md_var.h>
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#else
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#include <stdarg.h>
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#include <stdio.h>
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#include <string.h>
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#endif
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/*
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* These structures are used internally to keep track of regions of physical
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@ -87,6 +96,20 @@ static size_t excnt;
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long realmem;
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long Maxmem;
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#ifndef _KERNEL
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static void
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panic(const char *fmt, ...)
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{
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va_list va;
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va_start(va, fmt);
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vfprintf(stderr, fmt, va);
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fprintf(stderr, "\n");
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va_end(va);
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__builtin_trap();
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}
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#endif
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/*
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* Print the contents of the physical and excluded region tables using the
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* provided printf-like output function (which will be either printf or
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@ -469,6 +492,7 @@ physmem_avail(vm_paddr_t *avail, size_t maxavail)
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return (regions_to_avail(avail, EXFLAG_NOALLOC, maxavail, 0, NULL, NULL));
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}
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#ifdef _KERNEL
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/*
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* Process all the regions added earlier into the global avail lists.
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*
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@ -495,6 +519,7 @@ physmem_init_kernel_globals(void)
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panic("No memory entries in phys_avail");
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Maxmem = atop(phys_avail[nextidx - 1]);
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}
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#endif
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#ifdef DDB
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#include <ddb/ddb.h>
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@ -23,6 +23,7 @@ ATF_TESTS_C+= ptrace_test
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TEST_METADATA.ptrace_test+= timeout="15"
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ATF_TESTS_C+= reaper
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ATF_TESTS_C+= sigaltstack
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ATF_TESTS_C+= subr_physmem_test
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PLAIN_TESTS_C+= subr_unit_test
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ATF_TESTS_C+= sysctl_kern_proc
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ATF_TESTS_C+= sys_getrandom
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@ -78,6 +79,9 @@ SRCS.libkern_crc32+= crc32_sse42.c
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SRCS.libkern_crc32+= crc32c_armv8.S
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.endif
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CFLAGS.subr_physmem.c+= -D_WANT_FREEBSD_BITSET
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SRCS.subr_physmem_test+= subr_physmem_test.c subr_physmem.c
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# subr_unit.c contains functions whose prototypes lie in headers that cannot be
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# included in userland. But as far as subr_unit_test goes, they're effectively
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# static. So it's ok to disable -Wmissing-prototypes for this program.
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122
tests/sys/kern/subr_physmem_test.c
Normal file
122
tests/sys/kern/subr_physmem_test.c
Normal file
@ -0,0 +1,122 @@
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/*-
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* Copyright (c) 2021 The FreeBSD Foundation
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* All rights reserved.
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*
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* This software was developed by Andrew Turner under
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* sponsorship from the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/physmem.h>
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#include <atf-c.h>
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ATF_TC_WITHOUT_HEAD(hwregion);
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ATF_TC_BODY(hwregion, tc)
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{
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vm_paddr_t avail[4];
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size_t len;
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physmem_hardware_region(2 * PAGE_SIZE, PAGE_SIZE);
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len = physmem_avail(avail, 4);
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ATF_CHECK_EQ(len, 2);
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ATF_CHECK_EQ(avail[0], 2 * PAGE_SIZE);
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ATF_CHECK_EQ(avail[1], 3 * PAGE_SIZE);
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/* Add an overlap */
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physmem_hardware_region(2 * PAGE_SIZE, 2 * PAGE_SIZE);
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len = physmem_avail(avail, 4);
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ATF_CHECK_EQ(len, 2);
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ATF_CHECK_EQ(avail[0], 2 * PAGE_SIZE);
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ATF_CHECK_EQ(avail[1], 4 * PAGE_SIZE);
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/* Add a touching region */
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physmem_hardware_region(4 * PAGE_SIZE, PAGE_SIZE);
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len = physmem_avail(avail, 4);
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ATF_CHECK_EQ(len, 2);
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ATF_CHECK_EQ(avail[0], 2 * PAGE_SIZE);
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ATF_CHECK_EQ(avail[1], 5 * PAGE_SIZE);
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/* Add a partial overlap */
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physmem_hardware_region(4 * PAGE_SIZE, 2 * PAGE_SIZE);
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len = physmem_avail(avail, 4);
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ATF_CHECK_EQ(len, 2);
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ATF_CHECK_EQ(avail[0], 2 * PAGE_SIZE);
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ATF_CHECK_EQ(avail[1], 6 * PAGE_SIZE);
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/* Add a non-page aligned section */
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physmem_hardware_region(6 * PAGE_SIZE, PAGE_SIZE / 2);
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len = physmem_avail(avail, 4);
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ATF_CHECK_EQ(len, 2);
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ATF_CHECK_EQ(avail[0], 2 * PAGE_SIZE);
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ATF_CHECK_EQ(avail[1], 6 * PAGE_SIZE);
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#ifdef notyet /* This doesn't currently work */
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/* Add the remaining part of the page */
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physmem_hardware_region(6 * PAGE_SIZE + PAGE_SIZE / 2, PAGE_SIZE / 2);
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len = physmem_avail(avail, 4);
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ATF_CHECK_EQ(len, 2);
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ATF_CHECK_EQ(avail[0], 2 * PAGE_SIZE);
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ATF_CHECK_EQ(avail[1], 7 * PAGE_SIZE);
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#endif
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}
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ATF_TC_WITHOUT_HEAD(hwregion_exclude);
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ATF_TC_BODY(hwregion_exclude, tc)
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{
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vm_paddr_t avail[6];
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size_t len;
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physmem_hardware_region(2 * PAGE_SIZE, 5 * PAGE_SIZE);
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physmem_exclude_region(4 * PAGE_SIZE, PAGE_SIZE, EXFLAG_NOALLOC);
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len = physmem_avail(avail, 6);
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ATF_CHECK_EQ(len, 4);
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ATF_CHECK_EQ(avail[0], 2 * PAGE_SIZE);
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ATF_CHECK_EQ(avail[1], 4 * PAGE_SIZE);
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ATF_CHECK_EQ(avail[2], 5 * PAGE_SIZE);
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ATF_CHECK_EQ(avail[3], 7 * PAGE_SIZE);
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/* Check mis-aligned/sized excluded regions work */
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physmem_exclude_region(4 * PAGE_SIZE - 1, PAGE_SIZE + 2,
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EXFLAG_NOALLOC);
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len = physmem_avail(avail, 6);
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ATF_CHECK_EQ(len, 4);
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ATF_CHECK_EQ(avail[0], 2 * PAGE_SIZE);
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ATF_CHECK_EQ(avail[1], 3 * PAGE_SIZE);
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ATF_CHECK_EQ(avail[2], 6 * PAGE_SIZE);
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ATF_CHECK_EQ(avail[3], 7 * PAGE_SIZE);
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}
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ATF_TP_ADD_TCS(tp)
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{
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ATF_TP_ADD_TC(tp, hwregion);
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ATF_TP_ADD_TC(tp, hwregion_exclude);
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return (atf_no_error());
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}
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