[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [PATCH v3 3/5] acpi: pc: add fw_cfg device node to ssdt
From: |
Gabriel L. Somlo |
Subject: |
[Qemu-devel] [PATCH v3 3/5] acpi: pc: add fw_cfg device node to ssdt |
Date: |
Thu, 17 Sep 2015 10:56:32 -0400 |
Add a fw_cfg device node to the ACPI SSDT, on machine types
pc-*-2.5 and up. While the guest-side BIOS can't utilize
this information (since it has to access the hard-coded
fw_cfg device to extract ACPI tables to begin with), having
fw_cfg listed in ACPI will help the guest kernel keep a more
accurate inventory of in-use IO port regions.
Signed-off-by: Gabriel Somlo <address@hidden>
---
hw/i386/acpi-build.c | 21 +++++++++++++++++++++
hw/i386/pc_piix.c | 1 +
hw/i386/pc_q35.c | 1 +
include/hw/i386/pc.h | 1 +
4 files changed, 24 insertions(+)
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index 95e0c65..e3d097b 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -906,6 +906,7 @@ build_ssdt(GArray *table_data, GArray *linker,
PcPciInfo *pci, PcGuestInfo *guest_info)
{
MachineState *machine = MACHINE(qdev_get_machine());
+ PCMachineClass *pcmc = PC_MACHINE_GET_CLASS(machine);
uint32_t nr_mem = machine->ram_slots;
unsigned acpi_cpus = guest_info->apic_id_limit;
Aml *ssdt, *sb_scope, *scope, *pkg, *dev, *method, *crs, *field, *ifctx;
@@ -1071,6 +1072,26 @@ build_ssdt(GArray *table_data, GArray *linker,
aml_append(scope, aml_name_decl("_S5", pkg));
aml_append(ssdt, scope);
+ if (!pcmc->acpi_no_fw_cfg_node) {
+ scope = aml_scope("\\_SB");
+ dev = aml_device("FWCF");
+
+ aml_append(dev, aml_name_decl("_HID", aml_string("QEMU0002")));
+
+ crs = aml_resource_template();
+ /* when using port i/o, the 8-bit data register *always* overlaps
+ * with half of the 16-bit control register. Hence, the total size
+ * of the i/o region used is FW_CFG_CTL_SIZE */
+ aml_append(crs,
+ aml_io(AML_DECODE16, FW_CFG_IO_BASE, FW_CFG_IO_BASE,
+ 0x01, FW_CFG_CTL_SIZE)
+ );
+ aml_append(dev, aml_name_decl("_CRS", crs));
+
+ aml_append(scope, dev);
+ aml_append(ssdt, scope);
+ }
+
if (misc->applesmc_io_base) {
scope = aml_scope("\\_SB.PCI0.ISA");
dev = aml_device("SMC");
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index 3f925b2..003c28a 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -467,6 +467,7 @@ static void pc_i440fx_2_4_machine_options(MachineClass *m)
PCMachineClass *pcmc = PC_MACHINE_CLASS(m);
pc_i440fx_machine_options(m);
pcmc->broken_reserved_end = true;
+ pcmc->acpi_no_fw_cfg_node = true;
m->default_machine_opts = "firmware=bios-256k.bin";
m->default_display = "std";
m->alias = "pc";
diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
index 11601ab..c4656f1 100644
--- a/hw/i386/pc_q35.c
+++ b/hw/i386/pc_q35.c
@@ -371,6 +371,7 @@ static void pc_q35_2_4_machine_options(MachineClass *m)
PCMachineClass *pcmc = PC_MACHINE_CLASS(m);
pc_q35_machine_options(m);
pcmc->broken_reserved_end = true;
+ pcmc->acpi_no_fw_cfg_node = true;
m->default_machine_opts = "firmware=bios-256k.bin";
m->default_display = "std";
m->no_floppy = 1;
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index fadcaa4..2955bd9 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -62,6 +62,7 @@ struct PCMachineClass {
bool broken_reserved_end;
HotplugHandler *(*get_hotplug_handler)(MachineState *machine,
DeviceState *dev);
+ bool acpi_no_fw_cfg_node;
};
#define TYPE_PC_MACHINE "generic-pc-machine"
--
2.4.3
- [Qemu-devel] [PATCH v3 0/5] add ACPI node for fw_cfg on pc and arm, Gabriel L. Somlo, 2015/09/17
- [Qemu-devel] [PATCH v3 4/5] acpi: arm: add fw_cfg device node to dsdt, Gabriel L. Somlo, 2015/09/17
- [Qemu-devel] [PATCH v3 5/5] fw_cfg: document ACPI device node information, Gabriel L. Somlo, 2015/09/17
- [Qemu-devel] [PATCH v3 2/5] pc: fw_cfg: move ioport base constant to pc.h, Gabriel L. Somlo, 2015/09/17
- [Qemu-devel] [PATCH v3 3/5] acpi: pc: add fw_cfg device node to ssdt,
Gabriel L. Somlo <=
- [Qemu-devel] [PATCH v3 1/5] fw_cfg: expose control register size in fw_cfg.h, Gabriel L. Somlo, 2015/09/17
- Re: [Qemu-devel] [PATCH v3 0/5] add ACPI node for fw_cfg on pc and arm, Michael S. Tsirkin, 2015/09/17
- Re: [Qemu-devel] [PATCH v3 0/5] add ACPI node for fw_cfg on pc and arm, Igor Mammedov, 2015/09/23