Create a list of devices found in the DSDT table. Add helper functions
to find devices, walk the list and figure device informations like mmio
ranges and irqs.
Signed-off-by: Gerd Hoffmann <kra...@redhat.com>
---
Makefile | 2 +-
src/util.h | 11 +
src/fw/biostables.c | 9 +
src/fw/dsdt_parser.c | 668 +++++++++++++++++++++++++++++++++++++++++++
src/fw/paravirt.c | 5 +-
src/Kconfig | 7 +
6 files changed, 699 insertions(+), 3 deletions(-)
create mode 100644 src/fw/dsdt_parser.c
diff --git a/Makefile b/Makefile
index 985ef591a13b..f02eda314784 100644
--- a/Makefile
+++ b/Makefile
@@ -42,7 +42,7 @@ SRC32FLAT=$(SRCBOTH) post.c e820map.c malloc.c romfile.c
x86.c optionroms.c \
hw/pcidevice.c hw/ahci.c hw/pvscsi.c hw/usb-xhci.c hw/usb-hub.c
hw/sdcard.c \
fw/coreboot.c fw/lzmadecode.c fw/multiboot.c fw/csm.c fw/biostables.c \
fw/paravirt.c fw/shadow.c fw/pciinit.c fw/smm.c fw/smp.c fw/mtrr.c
fw/xen.c \
- fw/acpi.c fw/mptable.c fw/pirtable.c fw/smbios.c fw/romfile_loader.c \
+ fw/acpi.c fw/mptable.c fw/pirtable.c fw/smbios.c fw/romfile_loader.c
fw/dsdt_parser.c \
hw/virtio-ring.c hw/virtio-pci.c hw/virtio-mmio.c hw/virtio-blk.c
hw/virtio-scsi.c \
hw/tpm_drivers.c hw/nvme.c
SRC32SEG=string.c output.c pcibios.c apm.c stacks.c hw/pci.c hw/serialio.c
diff --git a/src/util.h b/src/util.h
index 4f27fc307439..0de35229dc0c 100644
--- a/src/util.h
+++ b/src/util.h
@@ -94,6 +94,17 @@ void display_uuid(void);
void copy_table(void *pos);
void smbios_setup(void);
+// fw/dsdt_parser.c
+struct acpi_device;
+void acpi_dsdt_parse(void);
+struct acpi_device *acpi_dsdt_find_string(struct acpi_device *prev, const char
*hid);
+struct acpi_device *acpi_dsdt_find_eisaid(struct acpi_device *prev, u16
eisaid);
+char *acpi_dsdt_name(struct acpi_device *dev);
+int acpi_dsdt_present_eisaid(u16 eisaid);
+int acpi_dsdt_find_io(struct acpi_device *dev, u64 *min, u64 *max);
+int acpi_dsdt_find_mem(struct acpi_device *dev, u64 *min, u64 *max);
+int acpi_dsdt_find_irq(struct acpi_device *dev, u64 *irq);
+
// fw/coreboot.c
extern const char *CBvendor, *CBpart;
struct cbfs_file;
diff --git a/src/fw/biostables.c b/src/fw/biostables.c
index 0d4fdb9c22e8..0597459e9875 100644
--- a/src/fw/biostables.c
+++ b/src/fw/biostables.c
@@ -4,6 +4,14 @@
//
// This file may be distributed under the terms of the GNU LGPLv3 license.
+#include "byteorder.h" // le32_to_cpu
+#include "config.h" // CONFIG_*
+// Support for manipulating bios tables (pir, mptable, acpi, smbios).
+//
+// Copyright (C) 2008,2009 Kevin O'Connor <ke...@koconnor.net>
+//
+// This file may be distributed under the terms of the GNU LGPLv3 license.
+
#include "byteorder.h" // le32_to_cpu
#include "config.h" // CONFIG_*
#include "hw/pci.h" // pci_config_writeb
@@ -256,6 +264,7 @@ find_acpi_features(void)
void *p = fadt;
acpi_set_reset_reg(p + 116, *(u8 *)(p + 128));
}
+ acpi_dsdt_parse();
}
diff --git a/src/fw/dsdt_parser.c b/src/fw/dsdt_parser.c
new file mode 100644
index 000000000000..87c1a3ac3a00
--- /dev/null
+++ b/src/fw/dsdt_parser.c
@@ -0,0 +1,668 @@
+// Support for parsing dsdt acpi tables
+//
+// Copyright (C) 2008,2009 Kevin O'Connor <ke...@koconnor.net>
+//
+// This file may be distributed under the terms of the GNU LGPLv3 license.
+
+#include "config.h" // CONFIG_*
+#include "list.h" // hlist_*
+#include "malloc.h" // malloc_*
+#include "output.h" // dprintf
+#include "string.h" // memcpy
+#include "util.h"
+#include "std/acpi.h" // struct rsdp_descriptor
+
+/****************************************************************
+ * DSDT parser
+ ****************************************************************/
+
+struct acpi_device {
+ struct hlist_node node;
+ char name[16];
+ u8 *hid_aml;
+ u8 *sta_aml;
+ u8 *crs_data;
+ int crs_size;
+};
+static struct hlist_head acpi_devices VARVERIFY32INIT;
+static const int parse_dumpdevs = 0;
+
+struct parse_state {
+ char name[32];
+ struct acpi_device *dev;
+ int error;
+ int depth;
+};
+
+static void parse_termlist(struct parse_state *s,
+ u8 *ptr, int offset, int pkglength);
+
+static void hex(const u8 *ptr, int count, int lvl, const char *item)
+{
+ int l = 0, i;
+
+ do {
+ dprintf(lvl, "%s: %04x: ", item, l);
+ for (i = l; i < l+16; i += 4)
+ dprintf(lvl, "%02x %02x %02x %02x ",
+ ptr[i+0], ptr[i+1], ptr[i+2], ptr[i+3]);
+ for (i = l; i < l+16; i++)
+ dprintf(lvl, "%c", (ptr[i] > 0x20 && ptr[i] < 0x80)
+ ? ptr[i] : '.');
+ dprintf(lvl, "\n");
+ l += 16;
+ } while (l < count);
+}
+
+static u64 parse_resource_int(u8 *ptr, int count)
+{
+ u64 value = 0;
+ int index = 0;
+
+ for (index = 0; index < count; index++)
+ value |= (u64)ptr[index] << (index * 8);
+ return value;
+}
+
+static int parse_resource_bit(u8 *ptr, int count)
+{
+ int bit;
+
+ for (bit = 0; bit < count*8; bit++)
+ if (ptr[bit/8] & (1 << (bit%8)))
+ return bit;
+ return 0;
+}
+
+static int parse_resource(u8 *ptr, int length, int *type, u64 *min, u64 *max)
+{
+ int rname, rsize;
+ u64 len;
+
+ *type = -1;
+ *min = 0;
+ *max = 0;
+ len = 0;
+ if (!(ptr[0] & 0x80)) {
+ /* small resource */
+ rname = (ptr[0] >> 3) & 0x0f;
+ rsize = ptr[0] & 0x07;
+ rsize++;
+ switch (rname) {
+ case 0x04: /* irq */
+ *min = parse_resource_bit(ptr + 1, rsize);
+ *max = *min;
+ *type = 3;
+ break;
+ case 0x0f: /* end marker */
+ return 0;
+ case 0x08: /* io */
+ *min = parse_resource_int(ptr + 2, 2);
+ *max = parse_resource_int(ptr + 4, 2);
+ if (*min == *max) {
+ *max = *min + ptr[7] - 1;
+ *type = 1;
+ }
+ break;
+ case 0x09: /* fixed io */
+ *min = parse_resource_int(ptr + 2, 2);
+ *max = *min + ptr[4] - 1;
+ *type = 1;
+ break;
+ default:
+ dprintf(3, "%s: small: 0x%x (len %d)\n",
+ __func__, rname, rsize);
+ break;
+ }
+ } else {
+ /* large resource */
+ rname = ptr[0] & 0x7f;
+ rsize = ptr[2] << 8 | ptr[1];
+ rsize += 3;
+ switch (rname) {
+ case 0x06: /* 32-bit Fixed Location Memory Range Descriptor */
+ *min = parse_resource_int(ptr + 4, 4);
+ len = parse_resource_int(ptr + 8, 4);
+ *max = *min + len - 1;
+ *type = 0;
+ break;
+ case 0x07: /* DWORD Address Space Descriptor */
+ *min = parse_resource_int(ptr + 10, 4);
+ *max = parse_resource_int(ptr + 14, 4);
+ *type = ptr[3];
+ break;
+ case 0x08: /* WORD Address Space Descriptor */
+ *min = parse_resource_int(ptr + 8, 2);
+ *max = parse_resource_int(ptr + 10, 2);
+ *type = ptr[3];
+ break;
+ case 0x09: /* irq */
+ *min = parse_resource_int(ptr + 5, 4);
+ *max = *min;
+ *type = 3;
+ break;
+ case 0x0a: /* QWORD Address Space Descriptor */
+ *min = parse_resource_int(ptr + 14, 8);
+ *max = parse_resource_int(ptr + 22, 8);
+ *type = ptr[3];
+ break;
+ default:
+ dprintf(3, "%s: large: 0x%x (len %d)\n", __func__, rname, rsize);
+ break;
+ }
+ }
+ return rsize;
+}
+
+static int find_resource(u8 *ptr, int len, int kind, u64 *min, u64 *max)
+{
+ int type, size, offset = 0;
+
+ do {
+ size = parse_resource(ptr + offset, len - offset,
+ &type, min, max);
+ if (kind == type)
+ return 0;
+ offset += size;
+ } while (size > 0 && offset < len);
+ return -1;
+}
+
+static int print_resources(const char *prefix, u8 *ptr, int len)
+{
+ static const char *typename[] = { "mem", "i/o", "bus" };
+ int type, size, offset = 0;
+ u64 min, max;
+
+ do {
+ size = parse_resource(ptr + offset, len - offset,
+ &type, &min, &max);
+ switch (type) {
+ case 0:
+ case 1:
+ case 2:
+ dprintf(1, "%s%s 0x%llx -> 0x%llx\n",
+ prefix, typename[type], min, max);
+ break;
+ case 3:
+ dprintf(1, "%sirq %lld\n", prefix, min);
+ break;
+ }
+ offset += size;
+ } while (size > 0 && offset < len);
+ return -1;
+}
+
+static int parse_nameseg(u8 *ptr, char **dst)
+{
+ if (dst && *dst) {
+ *(dst[0]++) = ptr[0];
+ if (ptr[1] != '_')
+ *(dst[0]++) = ptr[1];
+ if (ptr[2] != '_')
+ *(dst[0]++) = ptr[2];
+ if (ptr[3] != '_')
+ *(dst[0]++) = ptr[3];
+ *(dst[0]) = 0;
+ }
+ return 4;
+}
+
+static int parse_namestring(struct parse_state *s,
+ u8 *ptr, const char *item)
+{
+ char *dst = s->name;
+ int offset = 0;
+ int i, count;
+
+ for (;;) {
+ switch (ptr[offset]) {
+ case 0: /* null name */
+ offset++;
+ *(dst++) = 0;
+ break;
+ case 0x2e:
+ offset++;
+ offset += parse_nameseg(ptr + offset, &dst);
+ *(dst++) = '.';
+ offset += parse_nameseg(ptr + offset, &dst);
+ break;
+ case 0x2f:
+ offset++;
+ count = ptr[offset];
+ offset++;
+ for (i = 0; i < count; i++) {
+ if (i)
+ *(dst++) = '.';
+ offset += parse_nameseg(ptr + offset, &dst);
+ }
+ break;
+ case '\\':
+ *(dst++) = '\\';
+ offset++;
+ continue;
+ case '^':
+ *(dst++) = '^';
+ offset++;
+ continue;
+ case 'A' ... 'Z':
+ case '_':
+ offset += parse_nameseg(ptr, &dst);
+ break;
+ default:
+ hex(ptr, 16, 3, __func__);
+ s->error = 1;
+ break;
+ }
+ break;
+ }
+ dprintf(5, "%s: %d %s '%s'\n", __func__, s->depth,
+ item, s->name);
+ return offset;
+}
+
+static int parse_termarg_int(u8 *ptr, int *error, u64 *dst)
+{
+ u64 value;
+ int offset = 1;
+
+ switch (ptr[0]) {
+ case 0x00: /* zero */
+ value = 0;
+ break;
+ case 0x01: /* one */
+ value = 1;
+ break;
+ case 0x0a: /* byte prefix */
+ value = ptr[1];
+ offset++;
+ break;
+ case 0x0b: /* word prefix */
+ value = ptr[1] |
+ ((unsigned long)ptr[2] << 8);
+ offset += 2;
+ break;
+ case 0x0c: /* dword prefix */
+ value = ptr[1] |
+ ((unsigned long)ptr[2] << 8) |
+ ((unsigned long)ptr[3] << 16) |
+ ((unsigned long)ptr[4] << 24);
+ offset += 4;
+ break;
+ default:
+ value = 0;
+ hex(ptr, 16, 3, __func__);
+ if (error)
+ *error = 1;
+ break;
+ }
+
+ if (dst)
+ *dst = value;
+ dprintf(5, "%s: 0x%llx\n", __func__, value);
+ return offset;
+}
+
+static int parse_pkglength(u8 *ptr, int *pkglength)
+{
+ int offset = 2;
+
+ *pkglength = 0;
+ switch (ptr[0] >> 6) {
+ case 3:
+ *pkglength |= ptr[3] << 20;
+ offset++;
+ case 2:
+ *pkglength |= ptr[2] << 12;
+ offset++;
+ case 1:
+ *pkglength |= ptr[1] << 4;
+ *pkglength |= ptr[0] & 0x0f;
+ return offset;
+ case 0:
+ default:
+ *pkglength |= ptr[0] & 0x3f;
+ return 1;
+ }
+}
+
+static int parse_pkg_common(struct parse_state *s,
+ u8 *ptr, const char *item, int *pkglength)
+{
+ int offset;
+
+ offset = parse_pkglength(ptr, pkglength);
+ offset += parse_namestring(s, ptr + offset, item);
+ return offset;
+}
+
+static int parse_pkg_scope(struct parse_state *s,
+ u8 *ptr)
+{
+ int offset, pkglength;
+
+ offset = parse_pkg_common(s, ptr, "scope", &pkglength);
+ parse_termlist(s, ptr, offset, pkglength);
+ return pkglength;
+}
+
+static int parse_pkg_device(struct parse_state *s,
+ u8 *ptr)
+{
+ int offset, pkglength;
+
+ offset = parse_pkg_common(s, ptr, "device", &pkglength);
+
+ s->dev = malloc_tmp(sizeof(struct acpi_device));
+ if (!s->dev) {
+ warn_noalloc();
+ s->error = 1;
+ return pkglength;
+ }
+
+ memset(s->dev, 0, sizeof(struct acpi_device));
+ hlist_add_head(&s->dev->node, &acpi_devices);
+ strtcpy(s->dev->name, s->name, sizeof(s->name));
+ parse_termlist(s, ptr, offset, pkglength);
+ s->dev = NULL;
+
+ return pkglength;
+}
+
+static int parse_pkg_buffer(struct parse_state *s,
+ u8 *ptr)
+{
+ u64 blen;
+ int pkglength, offset;
+
+ offset = parse_pkglength(ptr, &pkglength);
+ offset += parse_termarg_int(ptr + offset, &s->error, &blen);
+ if (s->dev && strcmp(s->name, "_CRS") == 0) {
+ s->dev->crs_data = ptr + offset;
+ s->dev->crs_size = blen;
+ }
+ return pkglength;
+}
+
+static int parse_pkg_skip(struct parse_state *s,
+ u8 *ptr, int op, int name)
+{
+ int pkglength, offset;
+ char item[8];
+
+ snprintf(item, sizeof(item), "op %x", op);
+ offset = parse_pkglength(ptr, &pkglength);
+ if (name) {
+ parse_namestring(s, ptr + offset, item);
+ } else {
+ dprintf(5, "%s: %s (%d)\n", __func__, item, pkglength);
+ }
+ return pkglength;
+}
+
+static int parse_termobj(struct parse_state *s,
+ u8 *ptr)
+{
+ int offset = 1;
+
+ if (s->depth == 16) {
+ dprintf(1, "%s: deep recursion\n", __func__);
+ s->error = 1;
+ return offset;
+ }
+
+ s->depth++;
+ switch (ptr[0]) {
+ case 0x00: /* zero */
+ break;
+ case 0x01: /* one */
+ break;
+ case 0x08: /* name op */
+ offset += parse_namestring(s, ptr + offset, "name");
+ offset += parse_termobj(s, ptr + offset);
+ if (s->dev && strcmp(s->name, "_HID") == 0)
+ s->dev->hid_aml = ptr;
+ if (s->dev && strcmp(s->name, "_STA") == 0)
+ s->dev->sta_aml = ptr;
+ break;
+ case 0x0a: /* byte prefix */
+ offset++;
+ break;
+ case 0x0b: /* word prefix */
+ offset += 2;
+ break;
+ case 0x0c: /* dword prefix */
+ offset += 4;
+ break;
+ case 0x0d: /* string prefix */
+ while (ptr[offset])
+ offset++;
+ offset++;
+ break;
+ case 0x10: /* scope op */
+ offset += parse_pkg_scope(s, ptr + offset);
+ break;
+ case 0x11: /* buffer op */
+ offset += parse_pkg_buffer(s, ptr + offset);
+ break;
+ case 0x12: /* package op */
+ case 0x13: /* var package op */
+ offset += parse_pkg_skip(s, ptr + offset, ptr[0], 0);
+ break;
+ case 0x14: /* method op */
+ offset += parse_pkg_skip(s, ptr + offset, ptr[0], 1);
+ if (s->dev && strcmp(s->name, "_STA") == 0)
+ s->dev->sta_aml = ptr;
+ break;
+ case 0x5b: /* ext op prefix */
+ offset++;
+ switch (ptr[1]) {
+ case 0x01: /* mutex op */
+ offset += parse_namestring(s, ptr + offset, "mutex");
+ offset++; /* sync flags */
+ break;
+ case 0x80: /* op region op */
+ offset += parse_namestring(s, ptr + offset, "op region");
+ offset++; /* region space */
+ offset += parse_termarg_int(ptr + offset, &s->error, NULL);
+ offset += parse_termarg_int(ptr + offset, &s->error, NULL);
+ break;
+ case 0x81: /* field op */
+ case 0x83: /* processor op */
+ case 0x84: /* power resource op */
+ case 0x85: /* thermal zone op */
+ offset += parse_pkg_skip(s, ptr + offset, 0x5b00 | ptr[1], 1);
+ break;
+ case 0x82: /* device op */
+ offset += parse_pkg_device(s, ptr + offset);
+ break;
+ default:
+ hex(ptr, 16, 3, __func__);
+ s->error = 1;
+ break;
+ }
+ break;
+ default:
+ hex(ptr, 16, 3, __func__);
+ s->error = 1;
+ break;
+ }
+ s->depth--;
+
+ return offset;
+}
+
+static void parse_termlist(struct parse_state *s,
+ u8 *ptr, int offset, int pkglength)
+{
+ for (;;) {
+ offset += parse_termobj(s, ptr + offset);
+ if (offset == pkglength)
+ return;
+ if (offset > pkglength) {
+ dprintf(1, "%s: overrun: %d/%d\n", __func__,
+ offset, pkglength);
+ s->error = 1;
+ return;
+ }
+ if (s->error) {
+ dprintf(1, "%s: parse error, skip from %d/%d\n", __func__,
+ offset, pkglength);
+ s->error = 0;
+ return;
+ }
+ }
+}
+
+static struct acpi_device *acpi_dsdt_find(struct acpi_device *prev,
+ const u8 *aml, int size)
+{
+ struct acpi_device *dev;
+ struct hlist_node *node;
+
+ if (!prev)
+ node = acpi_devices.first;
+ else
+ node = prev->node.next;
+
+ for (; node != NULL; node = dev->node.next) {
+ dev = container_of(node, struct acpi_device, node);
+ if (!aml)
+ return dev;
+ if (!dev->hid_aml)
+ continue;
+ if (memcmp(dev->hid_aml + 5, aml, size) == 0)
+ return dev;
+ }
+ return NULL;
+}
+
+static int acpi_dsdt_present(struct acpi_device *dev)
+{
+ if (!dev)
+ return 0; /* no */
+ if (!dev->sta_aml)
+ return 1; /* yes */
+ if (dev->sta_aml[0] == 0x14)
+ return -1; /* unknown (can't evaluate method) */
+ if (dev->sta_aml[0] == 0x08) {
+ u64 value = 0;
+ parse_termarg_int(dev->sta_aml + 5, NULL, &value);
+ if (value == 0)
+ return 0; /* no */
+ else
+ return 1; /* yes */
+ }
+ return -1; /* unknown (should not happen) */
+}
+
+/****************************************************************
+ * DSDT parser, public interface
+ ****************************************************************/
+
+struct acpi_device *acpi_dsdt_find_string(struct acpi_device *prev,
+ const char *hid)
+{
+ if (!CONFIG_ACPI_PARSE)
+ return NULL;
+
+ u8 aml[10];
+ int len = snprintf((char*)aml, sizeof(aml), "\x0d%s", hid);
+ return acpi_dsdt_find(prev, aml, len);
+}
+
+struct acpi_device *acpi_dsdt_find_eisaid(struct acpi_device *prev, u16 eisaid)
+{
+ if (!CONFIG_ACPI_PARSE)
+ return NULL;
+ u8 aml[] = {
+ 0x0c, 0x41, 0xd0,
+ eisaid >> 8,
+ eisaid & 0xff
+ };
+ return acpi_dsdt_find(prev, aml, 5);
+}
+
+char *acpi_dsdt_name(struct acpi_device *dev)
+{
+ if (!CONFIG_ACPI_PARSE || !dev)
+ return NULL;
+ return dev->name;
+}
+
+int acpi_dsdt_find_io(struct acpi_device *dev, u64 *min, u64 *max)
+{
+ if (!CONFIG_ACPI_PARSE || !dev || !dev->crs_data)
+ return -1;
+ return find_resource(dev->crs_data, dev->crs_size,
+ 1 /* I/O */, min, max);
+}
+
+int acpi_dsdt_find_mem(struct acpi_device *dev, u64 *min, u64 *max)
+{
+ if (!CONFIG_ACPI_PARSE || !dev || !dev->crs_data)
+ return -1;
+ return find_resource(dev->crs_data, dev->crs_size,
+ 0 /* mem */, min, max);
+}
+
+int acpi_dsdt_find_irq(struct acpi_device *dev, u64 *irq)
+{
+ u64 max;
+ if (!CONFIG_ACPI_PARSE || !dev || !dev->crs_data)
+ return -1;
+ return find_resource(dev->crs_data, dev->crs_size,
+ 3 /* irq */, irq, &max);
+}
+
+int acpi_dsdt_present_eisaid(u16 eisaid)
+{
+ if (!CONFIG_ACPI_PARSE)
+ return -1; /* unknown */
+ if (hlist_empty(&acpi_devices))
+ return -1; /* unknown (no dsdt table) */
+
+ struct acpi_device *dev = acpi_dsdt_find_eisaid(NULL, eisaid);
+ return acpi_dsdt_present(dev);
+}
+
+void acpi_dsdt_parse(void)
+{
+ if (!CONFIG_ACPI_PARSE)
+ return;
+
+ struct fadt_descriptor_rev1 *fadt = find_acpi_table(FACP_SIGNATURE);
+ if (!fadt)
+ return;
+ u8 *dsdt = (void*)(fadt->dsdt);
+ if (!dsdt)
+ return;
+
+ u32 length = *(u32*)(dsdt + 4);
+ u32 offset = 0x24;
+ dprintf(1, "ACPI: parse DSDT at %p (len %d)\n", dsdt, length);
+
+ struct parse_state s;
+ memset(&s, 0, sizeof(s));
+ parse_termlist(&s, dsdt, offset, length);
+
+ if (!parse_dumpdevs)
+ return;
+
+ struct acpi_device *dev;
+ dprintf(1, "ACPI: dumping dsdt devices\n");
+ for (dev = acpi_dsdt_find(NULL, NULL, 0);
+ dev != NULL;
+ dev = acpi_dsdt_find(dev, NULL, 0)) {
+ dprintf(1, " %s", acpi_dsdt_name(dev));
+ if (dev->hid_aml)
+ dprintf(1, ", hid");
+ if (dev->sta_aml)
+ dprintf(1, ", sta (0x%x)", dev->sta_aml[0]);
+ if (dev->crs_data)
+ dprintf(1, ", crs");
+ dprintf(1, "\n");
+ if (dev->crs_data)
+ print_resources(" ", dev->crs_data, dev->crs_size);
+ }
+}
diff --git a/src/fw/paravirt.c b/src/fw/paravirt.c
index 119280c574fd..9247288a28c3 100644
--- a/src/fw/paravirt.c
+++ b/src/fw/paravirt.c
@@ -233,9 +233,10 @@ qemu_platform_setup(void)
RsdpAddr = find_acpi_rsdp();
- if (RsdpAddr)
+ if (RsdpAddr) {
+ acpi_dsdt_parse();
return;
-
+ }
/* If present, loader should have installed an RSDP.
* Not installed? We might still be able to continue
* using the builtin RSDP.
diff --git a/src/Kconfig b/src/Kconfig
index 6606ce4d46c9..3a8ffa15fded 100644
--- a/src/Kconfig
+++ b/src/Kconfig
@@ -524,6 +524,13 @@ menu "BIOS Tables"
This option can be disabled for QEMU 1.6 and older
to save some space in the ROM file.
If unsure, say Y.
+ config ACPI_PARSE
+ bool "Include ACPI DSDT parser."
+ default y
+ help
+ Support parsing ACPI DSDT for device probing.
+ Needed to find virtio-mmio devices.
+ If unsure, say Y.
endmenu
source vgasrc/Kconfig
--
2.18.2
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