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[Qemu-devel] [PATCH v2 34/47] pc: acpi-build: create CPU hotplug IO regi
From: |
Igor Mammedov |
Subject: |
[Qemu-devel] [PATCH v2 34/47] pc: acpi-build: create CPU hotplug IO region dynamically |
Date: |
Thu, 22 Jan 2015 14:50:18 +0000 |
it replaces a static complied in DSDT MMIO region
for CPU hotplug with one created at runtime
leaving only truly static CPU hotplug related ASL
bits in DSDT.
It also puts CPU_HOTPLUG_RESOURCE_DEVICE into
PCI0 scope and reserves resources from it,
preparing for dropping manual hole punching
in PCI0._CRS.
Later it also would make easier to reuse current
ACPI CPU hotplug on other targets.
Also later it would be possible to move remaining
CPU hotplug ASL methods into build_ssdt() and
add all CPU hotplug related AML into SSDT only
when CPU hotplug is enabled, further reducing
ACPI tables blob if CPU hotplug isn't used.
impl. detail:
Windows XP can't handle /BSODs/ OperationRegion
declaration in DSDT when variable from SSDT is used
for specifying its address/length and also when
Field declared in DSDT with OperationRegion from
SSDT if DSDT is being parsed before SSDT.
But it works just fine when referencing named
fields from another table. Hence OperationRegion
and Field declaration are moved to SSDT to make
XP based editions work.
PS:
Later Windows editions seem to be fine with above
conditions.
Signed-off-by: Igor Mammedov <address@hidden>
---
hw/i386/acpi-build.c | 27 +++++++++++++++++++++++++++
hw/i386/acpi-dsdt-cpu-hotplug.dsl | 17 +----------------
include/hw/acpi/pc-hotplug.h | 1 +
3 files changed, 29 insertions(+), 16 deletions(-)
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index 1245a38..09219e0 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -101,6 +101,8 @@ typedef struct AcpiPmInfo {
uint32_t gpe0_blk;
uint32_t gpe0_blk_len;
uint32_t io_base;
+ uint16_t cpu_hp_io_base;
+ uint16_t cpu_hp_io_len;
} AcpiPmInfo;
typedef struct AcpiMiscInfo {
@@ -177,12 +179,15 @@ static void acpi_get_pm_info(AcpiPmInfo *pm)
if (piix) {
obj = piix;
+ pm->cpu_hp_io_base = PIIX4_CPU_HOTPLUG_IO_BASE;
}
if (lpc) {
obj = lpc;
+ pm->cpu_hp_io_base = ICH9_CPU_HOTPLUG_IO_BASE;
}
assert(obj);
+ pm->cpu_hp_io_len = ACPI_GPE_PROC_LEN;
/* Fill in optional s3/s4 related properties */
o = object_property_get_qobject(obj, ACPI_PM_PROP_S3_DISABLED, NULL);
if (o) {
@@ -823,6 +828,28 @@ build_ssdt(GArray *table_data, GArray *linker,
{
AcpiAml sb_scope = acpi_scope("_SB");
+ /* create PCI0.PRES device and its _CRS to reserve CPU hotplug MMIO */
+ dev = acpi_device("PCI0." stringify(CPU_HOTPLUG_RESOURCE_DEVICE));
+ aml_append(&dev, acpi_name_decl("_HID", acpi_eisaid("PNP0A06")));
+ aml_append(&dev,
+ acpi_name_decl("_UID", acpi_string("CPU Hotplug resources"))
+ );
+ /* device present, functioning, decoding, not shown in UI */
+ aml_append(&dev, acpi_name_decl("_STA", acpi_int(0xB)));
+ crs = acpi_resource_template();
+ aml_append(&crs,
+ acpi_io(acpi_decode16, pm->cpu_hp_io_base, pm->cpu_hp_io_base,
+ 1, pm->cpu_hp_io_len)
+ );
+ aml_append(&dev, acpi_name_decl("_CRS", crs));
+ aml_append(&sb_scope, dev);
+ /* declare CPU hotplug MMIO region and PRS field to access it */
+ aml_append(&sb_scope, acpi_operation_region(
+ "PRST", acpi_system_io, pm->cpu_hp_io_base, pm->cpu_hp_io_len));
+ field = acpi_field("PRST", acpi_byte_acc);
+ aml_append(&field, acpi_named_field("PRS", 256));
+ aml_append(&sb_scope, field);
+
/* build Processor object for each processor */
for (i = 0; i < acpi_cpus; i++) {
dev = acpi_processor(i, 0, 0, "CP%.02X", i);
diff --git a/hw/i386/acpi-dsdt-cpu-hotplug.dsl
b/hw/i386/acpi-dsdt-cpu-hotplug.dsl
index 268d870..1aff746 100644
--- a/hw/i386/acpi-dsdt-cpu-hotplug.dsl
+++ b/hw/i386/acpi-dsdt-cpu-hotplug.dsl
@@ -16,12 +16,12 @@
/****************************************************************
* CPU hotplug
****************************************************************/
-#define CPU_HOTPLUG_RESOURCE_DEVICE PRES
Scope(\_SB) {
/* Objects filled in by run-time generated SSDT */
External(NTFY, MethodObj)
External(CPON, PkgObj)
+ External(PRS, FieldUnitObj)
/* Methods called by run-time generated SSDT Processor objects */
Method(CPMA, 1, NotSerialized) {
@@ -54,10 +54,6 @@ Scope(\_SB) {
}
#define CPU_STATUS_LEN ACPI_GPE_PROC_LEN
- OperationRegion(PRST, SystemIO, CPU_STATUS_BASE, CPU_STATUS_LEN)
- Field(PRST, ByteAcc, NoLock, Preserve) {
- PRS, 256
- }
Method(PRSC, 0) {
// Local5 = active cpu bitmap
Store(PRS, Local5)
@@ -91,15 +87,4 @@ Scope(\_SB) {
Increment(Local0)
}
}
-
- Device(CPU_HOTPLUG_RESOURCE_DEVICE) {
- Name(_HID, EisaId("PNP0A06"))
- Name(_UID, "CPU hotplug resources")
-
- Name(_CRS, ResourceTemplate() {
- IO(Decode16, CPU_STATUS_BASE, CPU_STATUS_BASE, 0, CPU_STATUS_LEN)
- })
-
- Name(_STA, 0xB) /* present, functioning, decoding, not shown in UI */
- }
}
diff --git a/include/hw/acpi/pc-hotplug.h b/include/hw/acpi/pc-hotplug.h
index b9db295..efa6ed7 100644
--- a/include/hw/acpi/pc-hotplug.h
+++ b/include/hw/acpi/pc-hotplug.h
@@ -28,6 +28,7 @@
#define ICH9_CPU_HOTPLUG_IO_BASE 0x0CD8
#define PIIX4_CPU_HOTPLUG_IO_BASE 0xaf00
+#define CPU_HOTPLUG_RESOURCE_DEVICE PRES
#define ACPI_MEMORY_HOTPLUG_IO_LEN 24
#define ACPI_MEMORY_HOTPLUG_BASE 0x0a00
--
1.8.3.1
- [Qemu-devel] [PATCH v2 26/47] acpi: add acpi_local0() term, (continued)
- [Qemu-devel] [PATCH v2 26/47] acpi: add acpi_local0() term, Igor Mammedov, 2015/01/22
- [Qemu-devel] [PATCH v2 20/47] acpi: add acpi_buffer() term, Igor Mammedov, 2015/01/22
- [Qemu-devel] [PATCH v2 28/47] pc: acpi-build: generate pvpanic device description dynamically, Igor Mammedov, 2015/01/22
- [Qemu-devel] [PATCH v2 27/47] acpi: add acpi_string() term, Igor Mammedov, 2015/01/22
- [Qemu-devel] [PATCH v2 29/47] acpi: add acpi_varpackage() term, Igor Mammedov, 2015/01/22
- [Qemu-devel] [PATCH v2 31/47] acpi: add acpi_processor() term, Igor Mammedov, 2015/01/22
- [Qemu-devel] [PATCH v2 35/47] acpi: add acpi_reserved_field() term, Igor Mammedov, 2015/01/22
- [Qemu-devel] [PATCH v2 33/47] pc: acpi-build: drop template patching and CPU hotplug objects dynamically, Igor Mammedov, 2015/01/22
- [Qemu-devel] [PATCH v2 36/47] pc: acpi-build: drop template patching and memory hotplug objects dynamically, Igor Mammedov, 2015/01/22
- [Qemu-devel] [PATCH v2 32/47] acpi: add acpi_eisaid() term, Igor Mammedov, 2015/01/22
- [Qemu-devel] [PATCH v2 34/47] pc: acpi-build: create CPU hotplug IO region dynamically,
Igor Mammedov <=
- [Qemu-devel] [PATCH v2 37/47] pc: acpi-build: create memory hotplug IO region dynamically, Igor Mammedov, 2015/01/22
- [Qemu-devel] [PATCH v2 30/47] acpi: add acpi_equal() term, Igor Mammedov, 2015/01/22
- [Qemu-devel] [PATCH v2 38/47] acpi: add acpi_word_bus_number(), acpi_word_io(), acpi_dword_memory(), acpi_qword_memory() terms, Igor Mammedov, 2015/01/22
- [Qemu-devel] [PATCH v2 39/47] pc: pcihp: expose MMIO base and len as properties, Igor Mammedov, 2015/01/22
- [Qemu-devel] [PATCH v2 42/47] acpi: add acpi_def_block() term, Igor Mammedov, 2015/01/22
[Qemu-devel] [PATCH v2 40/47] pc: acpi-build: reserve PCIHP MMIO resources, Igor Mammedov, 2015/01/22