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pc: acpi-build: generate pvpanic device description dynamically 

Drops AML template patching and allows to
save some space in SSDT if pvpanic device doesn't
exist by not including disabled device description
into SSDT. It also makes device description
smaller by replacing _STA method with named value
and dropping _INI method.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Igor Mammedov 2015-02-18 19:14:38 +00:00 committed by Michael S. Tsirkin
parent d5e5830f56
commit cd61cb2e2c
2 changed files with 32 additions and 51 deletions
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36
hw/i386/acpi-build.c
View File

@ -924,7 +924,7 @@ build_ssdt(GArray *table_data, GArray *linker,
uint32_t nr_mem = machine->ram_slots;
unsigned acpi_cpus = guest_info->apic_id_limit;
uint8_t *ssdt_ptr;
Aml *ssdt, *sb_scope, *scope, *pkg;
Aml *ssdt, *sb_scope, *scope, *pkg, *dev, *method, *crs, *field;
int i;
ssdt = init_aml_allocator();
@ -939,9 +939,6 @@ build_ssdt(GArray *table_data, GArray *linker,
patch_pci_windows(pci, ssdt_ptr, sizeof(ssdp_misc_aml));
ACPI_BUILD_SET_LE(ssdt_ptr, sizeof(ssdp_misc_aml),
ssdt_isa_pest[0], 16, misc->pvpanic_port);
ACPI_BUILD_SET_LE(ssdt_ptr, sizeof(ssdp_misc_aml),
ssdt_mctrl_nr_slots[0], 32, nr_mem);
@ -974,6 +971,37 @@ build_ssdt(GArray *table_data, GArray *linker,
aml_append(scope, aml_name_decl("_S5", pkg));
aml_append(ssdt, scope);
if (misc->pvpanic_port) {
scope = aml_scope("\\_SB.PCI0.ISA");
dev = aml_device("PEVR");
aml_append(dev, aml_name_decl("_HID", aml_string("QEMU0002")));
crs = aml_resource_template();
aml_append(crs,
aml_io(aml_decode16, misc->pvpanic_port, misc->pvpanic_port, 1, 1)
);
aml_append(dev, aml_name_decl("_CRS", crs));
aml_append(dev, aml_operation_region("PEOR", aml_system_io,
misc->pvpanic_port, 1));
field = aml_field("PEOR", aml_byte_acc);
aml_append(field, aml_named_field("PEPT", 8));
aml_append(dev, field);
method = aml_method("RDPT", 0);
aml_append(method, aml_store(aml_name("PEPT"), aml_local(0)));
aml_append(method, aml_return(aml_local(0)));
aml_append(dev, method);
method = aml_method("WRPT", 1);
aml_append(method, aml_store(aml_arg(0), aml_name("PEPT")));
aml_append(dev, method);
aml_append(scope, dev);
aml_append(ssdt, scope);
}
sb_scope = aml_scope("_SB");
{
/* build Processor object for each processor */

47
hw/i386/ssdt-misc.dsl
View File

@ -39,51 +39,4 @@ DefinitionBlock ("ssdt-misc.aml", "SSDT", 0x01, "BXPC", "BXSSDTSUSP", 0x1)
ACPI_EXTRACT_NAME_DWORD_CONST ssdt_mctrl_nr_slots
Name(MEMORY_SLOTS_NUMBER, 0x12345678)
}
External(\_SB.PCI0, DeviceObj)
External(\_SB.PCI0.ISA, DeviceObj)
Scope(\_SB.PCI0.ISA) {
Device(PEVT) {
Name(_HID, "QEMU0001")
/* PEST will be patched to be Zero if no such device */
ACPI_EXTRACT_NAME_WORD_CONST ssdt_isa_pest
Name(PEST, 0xFFFF)
OperationRegion(PEOR, SystemIO, PEST, 0x01)
Field(PEOR, ByteAcc, NoLock, Preserve) {
PEPT, 8,
}
Method(_STA, 0, NotSerialized) {
Store(PEST, Local0)
If (LEqual(Local0, Zero)) {
Return (0x00)
} Else {
Return (0x0F)
}
}
Method(RDPT, 0, NotSerialized) {
Store(PEPT, Local0)
Return (Local0)
}
Method(WRPT, 1, NotSerialized) {
Store(Arg0, PEPT)
}
Name(_CRS, ResourceTemplate() {
IO(Decode16, 0x00, 0x00, 0x01, 0x01, IO)
})
CreateWordField(_CRS, IO._MIN, IOMN)
CreateWordField(_CRS, IO._MAX, IOMX)
Method(_INI, 0, NotSerialized) {
Store(PEST, IOMN)
Store(PEST, IOMX)
}
}
}
}