acee774b3d
Move fetch_table() into acpi-utils.c renaming it to acpi_fetch_table() and reuse it in vmgenid-test that reads RSDT and then tables it references, to find and parse VMGNEID SSDT. While at it wrap RSDT referenced tables enumeration into FOREACH macro (similar to what we do with QLIST_FOREACH & co) to reuse it with bios and vmgenid tests. Signed-off-by: Igor Mammedov <imammedo@redhat.com> Acked-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
114 lines
2.9 KiB
C
114 lines
2.9 KiB
C
/*
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* ACPI Utility Functions
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*
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* Copyright (c) 2013 Red Hat Inc.
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* Copyright (c) 2017 Skyport Systems
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*
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* Authors:
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* Michael S. Tsirkin <mst@redhat.com>,
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* Ben Warren <ben@skyportsystems.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#include "qemu/osdep.h"
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#include <glib/gstdio.h>
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#include "qemu-common.h"
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#include "qemu/bitmap.h"
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#include "acpi-utils.h"
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#include "boot-sector.h"
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uint8_t acpi_calc_checksum(const uint8_t *data, int len)
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{
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int i;
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uint8_t sum = 0;
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for (i = 0; i < len; i++) {
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sum += data[i];
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}
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return sum;
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}
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uint32_t acpi_find_rsdp_address(QTestState *qts)
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{
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uint32_t off;
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/* RSDP location can vary across a narrow range */
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for (off = 0xf0000; off < 0x100000; off += 0x10) {
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uint8_t sig[] = "RSD PTR ";
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int i;
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for (i = 0; i < sizeof sig - 1; ++i) {
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sig[i] = qtest_readb(qts, off + i);
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}
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if (!memcmp(sig, "RSD PTR ", sizeof sig)) {
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break;
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}
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}
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return off;
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}
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uint64_t acpi_get_xsdt_address(uint8_t *rsdp_table)
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{
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uint64_t xsdt_physical_address;
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uint8_t revision = rsdp_table[15 /* Revision offset */];
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/* We must have revision 2 if we're looking for an XSDT pointer */
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g_assert(revision == 2);
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memcpy(&xsdt_physical_address, &rsdp_table[24 /* XsdtAddress offset */], 8);
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return le64_to_cpu(xsdt_physical_address);
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}
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void acpi_parse_rsdp_table(QTestState *qts, uint32_t addr, uint8_t *rsdp_table)
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{
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uint8_t revision;
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/* Read mandatory revision 0 table data (20 bytes) first */
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qtest_memread(qts, addr, rsdp_table, 20);
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revision = rsdp_table[15 /* Revision offset */];
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switch (revision) {
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case 0: /* ACPI 1.0 RSDP */
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break;
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case 2: /* ACPI 2.0+ RSDP */
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/* Read the rest of the RSDP table */
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qtest_memread(qts, addr + 20, rsdp_table + 20, 16);
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break;
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default:
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g_assert_not_reached();
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}
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ACPI_ASSERT_CMP64(*((uint64_t *)(rsdp_table)), "RSD PTR ");
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}
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/** acpi_fetch_table
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* load ACPI table at @addr_ptr offset pointer into buffer and return it in
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* @aml, its length in @aml_len and check that signature/checksum matches
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* actual one.
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*/
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void acpi_fetch_table(QTestState *qts, uint8_t **aml, uint32_t *aml_len,
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const uint8_t *addr_ptr, const char *sig,
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bool verify_checksum)
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{
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uint32_t addr, len;
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memcpy(&addr, addr_ptr , sizeof(addr));
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addr = le32_to_cpu(addr);
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qtest_memread(qts, addr + 4, &len, 4); /* Length of ACPI table */
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*aml_len = le32_to_cpu(len);
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*aml = g_malloc0(*aml_len);
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/* get whole table */
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qtest_memread(qts, addr, *aml, *aml_len);
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if (sig) {
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ACPI_ASSERT_CMP(**aml, sig);
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}
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if (verify_checksum) {
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g_assert(!acpi_calc_checksum(*aml, *aml_len));
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}
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}
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