aboutsummaryrefslogtreecommitdiff
path: root/hw/i386
diff options
context:
space:
mode:
Diffstat (limited to 'hw/i386')
-rw-r--r--hw/i386/acpi-build.c346
-rw-r--r--hw/i386/acpi-dsdt.dsl34
-rw-r--r--hw/i386/ssdt-pcihp.dsl11
3 files changed, 297 insertions, 94 deletions
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index 1d62866ec4..9cd3d0e698 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -40,6 +40,7 @@
/* Supported chipsets: */
#include "hw/acpi/piix4.h"
+#include "hw/acpi/pcihp.h"
#include "hw/i386/ich9.h"
#include "hw/pci/pci_bus.h"
#include "hw/pci-host/q35.h"
@@ -79,6 +80,12 @@ typedef struct AcpiMiscInfo {
uint16_t pvpanic_port;
} AcpiMiscInfo;
+typedef struct AcpiBuildPciBusHotplugState {
+ GArray *device_table;
+ GArray *notify_table;
+ struct AcpiBuildPciBusHotplugState *parent;
+} AcpiBuildPciBusHotplugState;
+
static void acpi_get_dsdt(AcpiMiscInfo *info)
{
uint16_t *applesmc_sta;
@@ -179,38 +186,6 @@ static void acpi_get_pm_info(AcpiPmInfo *pm)
NULL);
}
-static void acpi_get_hotplug_info(AcpiMiscInfo *misc)
-{
- int i;
- PCIBus *bus = find_i440fx();
-
- if (!bus) {
- /* Only PIIX supports ACPI hotplug */
- memset(misc->slot_hotplug_enable, 0, sizeof misc->slot_hotplug_enable);
- return;
- }
-
- memset(misc->slot_hotplug_enable, 0xff,
- DIV_ROUND_UP(PCI_SLOT_MAX, BITS_PER_BYTE));
-
- for (i = 0; i < ARRAY_SIZE(bus->devices); ++i) {
- PCIDeviceClass *pc;
- PCIDevice *pdev = bus->devices[i];
-
- if (!pdev) {
- continue;
- }
-
- pc = PCI_DEVICE_GET_CLASS(pdev);
-
- if (pc->no_hotplug) {
- int slot = PCI_SLOT(i);
-
- clear_bit(slot, misc->slot_hotplug_enable);
- }
- }
-}
-
static void acpi_get_misc_info(AcpiMiscInfo *info)
{
info->has_hpet = hpet_find();
@@ -376,6 +351,12 @@ static void build_package(GArray *package, uint8_t op, unsigned min_bytes)
build_prepend_byte(package, op);
}
+static void build_extop_package(GArray *package, uint8_t op)
+{
+ build_package(package, op, 1);
+ build_prepend_byte(package, 0x5B); /* ExtOpPrefix */
+}
+
static void build_append_value(GArray *table, uint32_t value, int size)
{
uint8_t prefix;
@@ -402,8 +383,44 @@ static void build_append_value(GArray *table, uint32_t value, int size)
}
}
-static void build_append_notify_target(GArray *method, GArray *target_name,
- uint32_t value, int size)
+static void build_append_int(GArray *table, uint32_t value)
+{
+ if (value == 0x00) {
+ build_append_byte(table, 0x00); /* ZeroOp */
+ } else if (value == 0x01) {
+ build_append_byte(table, 0x01); /* OneOp */
+ } else if (value <= 0xFF) {
+ build_append_value(table, value, 1);
+ } else if (value <= 0xFFFFF) {
+ build_append_value(table, value, 2);
+ } else {
+ build_append_value(table, value, 4);
+ }
+}
+
+static GArray *build_alloc_method(const char *name, uint8_t arg_count)
+{
+ GArray *method = build_alloc_array();
+
+ build_append_nameseg(method, "%s", name);
+ build_append_byte(method, arg_count); /* MethodFlags: ArgCount */
+
+ return method;
+}
+
+static void build_append_and_cleanup_method(GArray *device, GArray *method)
+{
+ uint8_t op = 0x14; /* MethodOp */
+
+ build_package(method, op, 0);
+
+ build_append_array(device, method);
+ build_free_array(method);
+}
+
+static void build_append_notify_target_ifequal(GArray *method,
+ GArray *target_name,
+ uint32_t value, int size)
{
GArray *notify = build_alloc_array();
uint8_t op = 0xA0; /* IfOp */
@@ -423,6 +440,7 @@ static void build_append_notify_target(GArray *method, GArray *target_name,
build_free_array(notify);
}
+/* End here */
#define ACPI_PORT_SMI_CMD 0x00b2 /* TODO: this is APM_CNT_IOPORT */
static inline void *acpi_data_push(GArray *table_data, unsigned size)
@@ -632,44 +650,236 @@ static inline char acpi_get_hex(uint32_t val)
#include "hw/i386/ssdt-pcihp.hex"
static void
-build_append_notify(GArray *device, const char *name,
- const char *format, int skip, int count)
+build_append_notify_method(GArray *device, const char *name,
+ const char *format, int count)
{
int i;
- GArray *method = build_alloc_array();
- uint8_t op = 0x14; /* MethodOp */
+ GArray *method = build_alloc_method(name, 2);
- build_append_nameseg(method, "%s", name);
- build_append_byte(method, 0x02); /* MethodFlags: ArgCount */
- for (i = skip; i < count; i++) {
+ for (i = 0; i < count; i++) {
GArray *target = build_alloc_array();
build_append_nameseg(target, format, i);
assert(i < 256); /* Fits in 1 byte */
- build_append_notify_target(method, target, i, 1);
+ build_append_notify_target_ifequal(method, target, i, 1);
build_free_array(target);
}
- build_package(method, op, 2);
- build_append_array(device, method);
- build_free_array(method);
+ build_append_and_cleanup_method(device, method);
}
-static void patch_pcihp(int slot, uint8_t *ssdt_ptr, uint32_t eject)
+static void patch_pcihp(int slot, uint8_t *ssdt_ptr)
{
- ssdt_ptr[ACPI_PCIHP_OFFSET_HEX] = acpi_get_hex(slot >> 4);
- ssdt_ptr[ACPI_PCIHP_OFFSET_HEX + 1] = acpi_get_hex(slot);
+ unsigned devfn = PCI_DEVFN(slot, 0);
+
+ ssdt_ptr[ACPI_PCIHP_OFFSET_HEX] = acpi_get_hex(devfn >> 4);
+ ssdt_ptr[ACPI_PCIHP_OFFSET_HEX + 1] = acpi_get_hex(devfn);
ssdt_ptr[ACPI_PCIHP_OFFSET_ID] = slot;
ssdt_ptr[ACPI_PCIHP_OFFSET_ADR + 2] = slot;
+}
+
+/* Assign BSEL property to all buses. In the future, this can be changed
+ * to only assign to buses that support hotplug.
+ */
+static void *acpi_set_bsel(PCIBus *bus, void *opaque)
+{
+ unsigned *bsel_alloc = opaque;
+ unsigned *bus_bsel;
+
+ if (bus->qbus.allow_hotplug) {
+ bus_bsel = g_malloc(sizeof *bus_bsel);
+
+ *bus_bsel = (*bsel_alloc)++;
+ object_property_add_uint32_ptr(OBJECT(bus), ACPI_PCIHP_PROP_BSEL,
+ bus_bsel, NULL);
+ }
+
+ return bsel_alloc;
+}
+
+static void acpi_set_pci_info(void)
+{
+ PCIBus *bus = find_i440fx(); /* TODO: Q35 support */
+ unsigned bsel_alloc = 0;
+
+ if (bus) {
+ /* Scan all PCI buses. Set property to enable acpi based hotplug. */
+ pci_for_each_bus_depth_first(bus, acpi_set_bsel, NULL, &bsel_alloc);
+ }
+}
+
+static void build_pci_bus_state_init(AcpiBuildPciBusHotplugState *state,
+ AcpiBuildPciBusHotplugState *parent)
+{
+ state->parent = parent;
+ state->device_table = build_alloc_array();
+ state->notify_table = build_alloc_array();
+}
+
+static void build_pci_bus_state_cleanup(AcpiBuildPciBusHotplugState *state)
+{
+ build_free_array(state->device_table);
+ build_free_array(state->notify_table);
+}
+
+static void *build_pci_bus_begin(PCIBus *bus, void *parent_state)
+{
+ AcpiBuildPciBusHotplugState *parent = parent_state;
+ AcpiBuildPciBusHotplugState *child = g_malloc(sizeof *child);
+
+ build_pci_bus_state_init(child, parent);
+
+ return child;
+}
+
+static void build_pci_bus_end(PCIBus *bus, void *bus_state)
+{
+ AcpiBuildPciBusHotplugState *child = bus_state;
+ AcpiBuildPciBusHotplugState *parent = child->parent;
+ GArray *bus_table = build_alloc_array();
+ DECLARE_BITMAP(slot_hotplug_enable, PCI_SLOT_MAX);
+ uint8_t op;
+ int i;
+ QObject *bsel;
+ GArray *method;
+ bool bus_hotplug_support = false;
+
+ if (bus->parent_dev) {
+ op = 0x82; /* DeviceOp */
+ build_append_nameseg(bus_table, "S%.02X_",
+ bus->parent_dev->devfn);
+ build_append_byte(bus_table, 0x08); /* NameOp */
+ build_append_nameseg(bus_table, "_SUN");
+ build_append_value(bus_table, PCI_SLOT(bus->parent_dev->devfn), 1);
+ build_append_byte(bus_table, 0x08); /* NameOp */
+ build_append_nameseg(bus_table, "_ADR");
+ build_append_value(bus_table, (PCI_SLOT(bus->parent_dev->devfn) << 16) |
+ PCI_FUNC(bus->parent_dev->devfn), 4);
+ } else {
+ op = 0x10; /* ScopeOp */;
+ build_append_nameseg(bus_table, "PCI0");
+ }
- /* Runtime patching of ACPI_EJ0: to disable hotplug for a slot,
- * replace the method name: _EJ0 by ACPI_EJ0_.
+ bsel = object_property_get_qobject(OBJECT(bus), ACPI_PCIHP_PROP_BSEL, NULL);
+ if (bsel) {
+ build_append_byte(bus_table, 0x08); /* NameOp */
+ build_append_nameseg(bus_table, "BSEL");
+ build_append_int(bus_table, qint_get_int(qobject_to_qint(bsel)));
+
+ memset(slot_hotplug_enable, 0xff, sizeof slot_hotplug_enable);
+
+ for (i = 0; i < ARRAY_SIZE(bus->devices); ++i) {
+ PCIDeviceClass *pc;
+ PCIDevice *pdev = bus->devices[i];
+
+ if (!pdev) {
+ continue;
+ }
+
+ pc = PCI_DEVICE_GET_CLASS(pdev);
+
+ if (pc->no_hotplug || pc->is_bridge) {
+ int slot = PCI_SLOT(i);
+
+ clear_bit(slot, slot_hotplug_enable);
+ }
+ }
+
+ /* Append Device object for each slot which supports eject */
+ for (i = 0; i < PCI_SLOT_MAX; i++) {
+ bool can_eject = test_bit(i, slot_hotplug_enable);
+ if (can_eject) {
+ void *pcihp = acpi_data_push(bus_table,
+ ACPI_PCIHP_SIZEOF);
+ memcpy(pcihp, ACPI_PCIHP_AML, ACPI_PCIHP_SIZEOF);
+ patch_pcihp(i, pcihp);
+ bus_hotplug_support = true;
+ }
+ }
+
+ method = build_alloc_method("DVNT", 2);
+
+ for (i = 0; i < PCI_SLOT_MAX; i++) {
+ GArray *notify;
+ uint8_t op;
+
+ if (!test_bit(i, slot_hotplug_enable)) {
+ continue;
+ }
+
+ notify = build_alloc_array();
+ op = 0xA0; /* IfOp */
+
+ build_append_byte(notify, 0x7B); /* AndOp */
+ build_append_byte(notify, 0x68); /* Arg0Op */
+ build_append_int(notify, 0x1 << i);
+ build_append_byte(notify, 0x00); /* NullName */
+ build_append_byte(notify, 0x86); /* NotifyOp */
+ build_append_nameseg(notify, "S%.02X_", PCI_DEVFN(i, 0));
+ build_append_byte(notify, 0x69); /* Arg1Op */
+
+ /* Pack it up */
+ build_package(notify, op, 0);
+
+ build_append_array(method, notify);
+
+ build_free_array(notify);
+ }
+
+ build_append_and_cleanup_method(bus_table, method);
+ }
+
+ /* Append PCNT method to notify about events on local and child buses.
+ * Add unconditionally for root since DSDT expects it.
*/
- /* Sanity check */
- assert(!memcmp(ssdt_ptr + ACPI_PCIHP_OFFSET_EJ0, "_EJ0", 4));
+ if (bus_hotplug_support || child->notify_table->len || !bus->parent_dev) {
+ method = build_alloc_method("PCNT", 0);
+
+ /* If bus supports hotplug select it and notify about local events */
+ if (bsel) {
+ build_append_byte(method, 0x70); /* StoreOp */
+ build_append_int(method, qint_get_int(qobject_to_qint(bsel)));
+ build_append_nameseg(method, "BNUM");
+ build_append_nameseg(method, "DVNT");
+ build_append_nameseg(method, "PCIU");
+ build_append_int(method, 1); /* Device Check */
+ build_append_nameseg(method, "DVNT");
+ build_append_nameseg(method, "PCID");
+ build_append_int(method, 3); /* Eject Request */
+ }
+
+ /* Notify about child bus events in any case */
+ build_append_array(method, child->notify_table);
+
+ build_append_and_cleanup_method(bus_table, method);
+
+ /* Append description of child buses */
+ build_append_array(bus_table, child->device_table);
+
+ /* Pack it up */
+ if (bus->parent_dev) {
+ build_extop_package(bus_table, op);
+ } else {
+ build_package(bus_table, op, 0);
+ }
- if (!eject) {
- memcpy(ssdt_ptr + ACPI_PCIHP_OFFSET_EJ0, "EJ0_", 4);
+ /* Append our bus description to parent table */
+ build_append_array(parent->device_table, bus_table);
+
+ /* Also tell parent how to notify us, invoking PCNT method.
+ * At the moment this is not needed for root as we have a single root.
+ */
+ if (bus->parent_dev) {
+ build_append_byte(parent->notify_table, '^'); /* ParentPrefixChar */
+ build_append_byte(parent->notify_table, 0x2E); /* DualNamePrefix */
+ build_append_nameseg(parent->notify_table, "S%.02X_",
+ bus->parent_dev->devfn);
+ build_append_nameseg(parent->notify_table, "PCNT");
+ }
}
+
+ build_free_array(bus_table);
+ build_pci_bus_state_cleanup(child);
+ g_free(child);
}
static void patch_pci_windows(PcPciInfo *pci, uint8_t *start, unsigned size)
@@ -741,7 +951,7 @@ build_ssdt(GArray *table_data, GArray *linker,
* Method(NTFY, 2) {If (LEqual(Arg0, 0x00)) {Notify(CP00, Arg1)} ...}
*/
/* Arg0 = Processor ID = APIC ID */
- build_append_notify(sb_scope, "NTFY", "CP%0.02X", 0, acpi_cpus);
+ build_append_notify_method(sb_scope, "NTFY", "CP%0.02X", acpi_cpus);
/* build "Name(CPON, Package() { One, One, ..., Zero, Zero, ... })" */
build_append_byte(sb_scope, 0x08); /* NameOp */
@@ -763,24 +973,19 @@ build_ssdt(GArray *table_data, GArray *linker,
}
{
- GArray *pci0 = build_alloc_array();
- uint8_t op = 0x10; /* ScopeOp */;
+ AcpiBuildPciBusHotplugState hotplug_state;
+ PCIBus *bus = find_i440fx(); /* TODO: Q35 support */
- build_append_nameseg(pci0, "PCI0");
+ build_pci_bus_state_init(&hotplug_state, NULL);
- /* build Device object for each slot */
- for (i = 1; i < PCI_SLOT_MAX; i++) {
- bool eject = test_bit(i, misc->slot_hotplug_enable);
- void *pcihp = acpi_data_push(pci0, ACPI_PCIHP_SIZEOF);
-
- memcpy(pcihp, ACPI_PCIHP_AML, ACPI_PCIHP_SIZEOF);
- patch_pcihp(i, pcihp, eject);
+ if (bus) {
+ /* Scan all PCI buses. Generate tables to support hotplug. */
+ pci_for_each_bus_depth_first(bus, build_pci_bus_begin,
+ build_pci_bus_end, &hotplug_state);
}
- build_append_notify(pci0, "PCNT", "S%0.02X_", 1, PCI_SLOT_MAX);
- build_package(pci0, op, 3);
- build_append_array(sb_scope, pci0);
- build_free_array(pci0);
+ build_append_array(sb_scope, hotplug_state.device_table);
+ build_pci_bus_state_cleanup(&hotplug_state);
}
build_package(sb_scope, op, 3);
@@ -1063,7 +1268,6 @@ void acpi_build(PcGuestInfo *guest_info, AcpiBuildTables *tables)
acpi_get_cpu_info(&cpu);
acpi_get_pm_info(&pm);
acpi_get_dsdt(&misc);
- acpi_get_hotplug_info(&misc);
acpi_get_misc_info(&misc);
acpi_get_pci_info(&pci);
@@ -1208,6 +1412,8 @@ void acpi_setup(PcGuestInfo *guest_info)
build_state->guest_info = guest_info;
+ acpi_set_pci_info();
+
acpi_build_tables_init(&tables);
acpi_build(build_state->guest_info, &tables);
diff --git a/hw/i386/acpi-dsdt.dsl b/hw/i386/acpi-dsdt.dsl
index b87c6e0ae8..6d76f30398 100644
--- a/hw/i386/acpi-dsdt.dsl
+++ b/hw/i386/acpi-dsdt.dsl
@@ -134,32 +134,28 @@ DefinitionBlock (
B0EJ, 32,
}
+ OperationRegion(BNMR, SystemIO, 0xae10, 0x04)
+ Field(BNMR, DWordAcc, NoLock, WriteAsZeros) {
+ BNUM, 32,
+ }
+
+ /* Lock to protect access to fields above. */
+ Mutex(BLCK, 0)
+
/* Methods called by bulk generated PCI devices below */
/* Methods called by hotplug devices */
- Method(PCEJ, 1, NotSerialized) {
+ Method(PCEJ, 2, NotSerialized) {
// _EJ0 method - eject callback
- Store(ShiftLeft(1, Arg0), B0EJ)
+ Acquire(BLCK, 0xFFFF)
+ Store(Arg0, BNUM)
+ Store(ShiftLeft(1, Arg1), B0EJ)
+ Release(BLCK)
Return (0x0)
}
/* Hotplug notification method supplied by SSDT */
External(\_SB.PCI0.PCNT, MethodObj)
-
- /* PCI hotplug notify method */
- Method(PCNF, 0) {
- // Local0 = iterator
- Store(Zero, Local0)
- While (LLess(Local0, 31)) {
- Increment(Local0)
- If (And(PCIU, ShiftLeft(1, Local0))) {
- PCNT(Local0, 1)
- }
- If (And(PCID, ShiftLeft(1, Local0))) {
- PCNT(Local0, 3)
- }
- }
- }
}
@@ -308,7 +304,9 @@ DefinitionBlock (
}
Method(_E01) {
// PCI hotplug event
- \_SB.PCI0.PCNF()
+ Acquire(\_SB.PCI0.BLCK, 0xFFFF)
+ \_SB.PCI0.PCNT()
+ Release(\_SB.PCI0.BLCK)
}
Method(_E02) {
// CPU hotplug event
diff --git a/hw/i386/ssdt-pcihp.dsl b/hw/i386/ssdt-pcihp.dsl
index d29a5b95d2..cc245c3e7c 100644
--- a/hw/i386/ssdt-pcihp.dsl
+++ b/hw/i386/ssdt-pcihp.dsl
@@ -25,6 +25,7 @@ DefinitionBlock ("ssdt-pcihp.aml", "SSDT", 0x01, "BXPC", "BXSSDTPCIHP", 0x1)
/* Objects supplied by DSDT */
External(\_SB.PCI0, DeviceObj)
External(\_SB.PCI0.PCEJ, MethodObj)
+ External(BSEL, IntObj)
Scope(\_SB.PCI0) {
@@ -33,19 +34,17 @@ DefinitionBlock ("ssdt-pcihp.aml", "SSDT", 0x01, "BXPC", "BXSSDTPCIHP", 0x1)
ACPI_EXTRACT_DEVICE_END ssdt_pcihp_end
ACPI_EXTRACT_DEVICE_STRING ssdt_pcihp_name
- // Method _EJ0 can be patched by BIOS to EJ0_
- // at runtime, if the slot is detected to not support hotplug.
- // Extract the offset of the address dword and the
- // _EJ0 name to allow this patching.
+ // Extract the offsets of the device name, address dword and the slot
+ // name byte - we fill them in for each device.
Device(SAA) {
ACPI_EXTRACT_NAME_BYTE_CONST ssdt_pcihp_id
Name(_SUN, 0xAA)
ACPI_EXTRACT_NAME_DWORD_CONST ssdt_pcihp_adr
Name(_ADR, 0xAA0000)
- ACPI_EXTRACT_METHOD_STRING ssdt_pcihp_ej0
Method(_EJ0, 1) {
- Return (PCEJ(_SUN))
+ PCEJ(BSEL, _SUN)
}
}
+
}
}
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-22 06:07:42 +0000