From cd61cb2e2c02c5c257a15a52b3d0616474e52997 Mon Sep 17 00:00:00 2001
From: Igor Mammedov <imammedo@redhat.com>
Date: Wed, 18 Feb 2015 19:14:38 +0000
Subject: [PATCH] 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>
---
hw/i386/acpi-build.c | 36 +++++++++++++++++++++++++++++----
hw/i386/ssdt-misc.dsl | 47 -------------------------------------------
2 files changed, 32 insertions(+), 51 deletions(-)
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index 4536fba0ab..2c581ef717 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -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 */
diff --git a/hw/i386/ssdt-misc.dsl b/hw/i386/ssdt-misc.dsl
index 26b9241544..81be858b85 100644
--- a/hw/i386/ssdt-misc.dsl
+++ b/hw/i386/ssdt-misc.dsl
@@ -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)
- }
- }
- }
}