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[Qemu-devel] [PULL 11/25] pc: acpi: cpuhp-legacy: switch ProcessorID to
From: |
Michael S. Tsirkin |
Subject: |
[Qemu-devel] [PULL 11/25] pc: acpi: cpuhp-legacy: switch ProcessorID to possible_cpus idx |
Date: |
Sun, 5 Jun 2016 16:21:25 +0300 |
From: Igor Mammedov <address@hidden>
In legacy cpu-hotplug ProcessorID == APIC ID is used
in MADT and cpu-hotplug AML. It was fine as both
are 8bit and unique. Spec depricated Processor()
with corresponding ProcessorID and advises to use
Device() and UID instead of it.
However UID is just 32bit and it can't fit ARM's
arch_id(MPIDR) which is 64bit. Also in case of
sparse arch_id() distribution, managment/lookup
of maps by arch_id(APIC ID/MPIDR) becomes complex
and expensive.
In preparation to common CPU hotplug with ARM
and to simplify lookup in possible_cpus[] map
switch ProcessorID to possible_cpus index in
MADT.
Legacy cpu-hotplug considerations:
HW interface of it is APIC ID based bitmask so
it's impossible to change, also CPON package in
AML also APIC ID based as well all the methods.
To avoid massive rewrite of AML keep is so and
just break assumption that ProcessorID == APIC ID,
ammending CPU_MAT_METHOD to accept APIC ID and
possible_cpus index, it needs them both to patch
MADT entry template. Also switch to possible_cpus
index Processor(ProcessorID) AML.
That way changes to MADT/AML are minimal and kept
inside AML/MADT not affecting external interfaces.
Signed-off-by: Igor Mammedov <address@hidden>
Reviewed-by: Michael S. Tsirkin <address@hidden>
Signed-off-by: Michael S. Tsirkin <address@hidden>
---
hw/acpi/cpu_hotplug.c | 23 +++++++++++++----------
hw/i386/acpi-build.c | 2 +-
2 files changed, 14 insertions(+), 11 deletions(-)
diff --git a/hw/acpi/cpu_hotplug.c b/hw/acpi/cpu_hotplug.c
index 36ea6c2..9d71d2f 100644
--- a/hw/acpi/cpu_hotplug.c
+++ b/hw/acpi/cpu_hotplug.c
@@ -99,7 +99,8 @@ void build_legacy_cpu_hotplug_aml(Aml *ctx, MachineState
*machine,
int i, apic_idx;
Aml *sb_scope = aml_scope("_SB");
uint8_t madt_tmpl[8] = {0x00, 0x08, 0x00, 0x00, 0x00, 0, 0, 0};
- Aml *cpu_id = aml_arg(0);
+ Aml *cpu_id = aml_arg(1);
+ Aml *apic_id = aml_arg(0);
Aml *cpu_on = aml_local(0);
Aml *madt = aml_local(1);
Aml *cpus_map = aml_name(CPU_ON_BITMAP);
@@ -111,30 +112,31 @@ void build_legacy_cpu_hotplug_aml(Aml *ctx, MachineState
*machine,
/*
* _MAT method - creates an madt apic buffer
- * cpu_id = Arg0 = Processor ID = Local APIC ID
+ * apic_id = Arg0 = Local APIC ID
+ * cpu_id = Arg1 = Processor ID
* cpu_on = Local0 = CPON flag for this cpu
* madt = Local1 = Buffer (in madt apic form) to return
*/
- method = aml_method(CPU_MAT_METHOD, 1, AML_NOTSERIALIZED);
+ method = aml_method(CPU_MAT_METHOD, 2, AML_NOTSERIALIZED);
aml_append(method,
- aml_store(aml_derefof(aml_index(cpus_map, cpu_id)), cpu_on));
+ aml_store(aml_derefof(aml_index(cpus_map, apic_id)), cpu_on));
aml_append(method,
aml_store(aml_buffer(sizeof(madt_tmpl), madt_tmpl), madt));
/* Update the processor id, lapic id, and enable/disable status */
aml_append(method, aml_store(cpu_id, aml_index(madt, aml_int(2))));
- aml_append(method, aml_store(cpu_id, aml_index(madt, aml_int(3))));
+ aml_append(method, aml_store(apic_id, aml_index(madt, aml_int(3))));
aml_append(method, aml_store(cpu_on, aml_index(madt, aml_int(4))));
aml_append(method, aml_return(madt));
aml_append(sb_scope, method);
/*
* _STA method - return ON status of cpu
- * cpu_id = Arg0 = Processor ID = Local APIC ID
+ * apic_id = Arg0 = Local APIC ID
* cpu_on = Local0 = CPON flag for this cpu
*/
method = aml_method(CPU_STATUS_METHOD, 1, AML_NOTSERIALIZED);
aml_append(method,
- aml_store(aml_derefof(aml_index(cpus_map, cpu_id)), cpu_on));
+ aml_store(aml_derefof(aml_index(cpus_map, apic_id)), cpu_on));
if_ctx = aml_if(cpu_on);
{
aml_append(if_ctx, aml_return(aml_int(0xF)));
@@ -243,11 +245,12 @@ void build_legacy_cpu_hotplug_aml(Aml *ctx, MachineState
*machine,
assert(apic_id < ACPI_CPU_HOTPLUG_ID_LIMIT);
- dev = aml_processor(apic_id, 0, 0, "CP%.02X", apic_id);
+ dev = aml_processor(i, 0, 0, "CP%.02X", apic_id);
method = aml_method("_MAT", 0, AML_NOTSERIALIZED);
aml_append(method,
- aml_return(aml_call1(CPU_MAT_METHOD, aml_int(apic_id))));
+ aml_return(aml_call2(CPU_MAT_METHOD, aml_int(apic_id), aml_int(i))
+ ));
aml_append(dev, method);
method = aml_method("_STA", 0, AML_NOTSERIALIZED);
@@ -268,7 +271,7 @@ void build_legacy_cpu_hotplug_aml(Aml *ctx, MachineState
*machine,
/* build this code:
* Method(NTFY, 2) {If (LEqual(Arg0, 0x00)) {Notify(CP00, Arg1)} ...}
*/
- /* Arg0 = Processor ID = APIC ID */
+ /* Arg0 = APIC ID */
method = aml_method(AML_NOTIFY_METHOD, 2, AML_NOTSERIALIZED);
for (i = 0; i < apic_ids->len; i++) {
int apic_id = apic_ids->cpus[i].arch_id;
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index b33fec9..768918f 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -354,7 +354,7 @@ build_madt(GArray *table_data, GArray *linker,
PCMachineState *pcms)
apic->type = ACPI_APIC_PROCESSOR;
apic->length = sizeof(*apic);
- apic->processor_id = apic_id;
+ apic->processor_id = i;
apic->local_apic_id = apic_id;
if (apic_ids->cpus[i].cpu != NULL) {
apic->flags = cpu_to_le32(1);
--
MST
- [Qemu-devel] [PULL 02/25] acpi: add aml_debug(), (continued)
- [Qemu-devel] [PULL 02/25] acpi: add aml_debug(), Michael S. Tsirkin, 2016/06/05
- [Qemu-devel] [PULL 03/25] acpi: add aml_refof(), Michael S. Tsirkin, 2016/06/05
- [Qemu-devel] [PULL 01/25] tests: acpi: report names of expected files in verbose mode, Michael S. Tsirkin, 2016/06/05
- [Qemu-devel] [PULL 04/25] pc: acpi: remove AML for empty/not used GPE handlers, Michael S. Tsirkin, 2016/06/05
- [Qemu-devel] [PULL 05/25] pc: acpi: consolidate CPU hotplug AML, Michael S. Tsirkin, 2016/06/05
- [Qemu-devel] [PULL 07/25] pc: acpi: cpu-hotplug: make AML CPU_foo defines local to cpu_hotplug_acpi_table.c, Michael S. Tsirkin, 2016/06/05
- [Qemu-devel] [PULL 06/25] pc: acpi: consolidate \GPE._E02 with the rest of CPU hotplug AML, Michael S. Tsirkin, 2016/06/05
- [Qemu-devel] [PULL 10/25] pc: acpi: simplify build_legacy_cpu_hotplug_aml() signature, Michael S. Tsirkin, 2016/06/05
- [Qemu-devel] [PULL 08/25] pc: acpi: mark current CPU hotplug functions as legacy, Michael S. Tsirkin, 2016/06/05
- [Qemu-devel] [PULL 09/25] pc: acpi: consolidate legacy CPU hotplug in one file, Michael S. Tsirkin, 2016/06/05
- [Qemu-devel] [PULL 11/25] pc: acpi: cpuhp-legacy: switch ProcessorID to possible_cpus idx,
Michael S. Tsirkin <=
- [Qemu-devel] [PULL 12/25] tests: acpi: update tables with consolidated legacy cpu-hotplug AML, Michael S. Tsirkin, 2016/06/05
- [Qemu-devel] [PULL 13/25] ipmi: rework the fwinfo to be fetched from the interface, Michael S. Tsirkin, 2016/06/05
- [Qemu-devel] [PULL 14/25] pc: Postpone SMBIOS table installation to post machine init, Michael S. Tsirkin, 2016/06/05
- [Qemu-devel] [PULL 15/25] acpi: extend ACPI interface to provide send_event hook, Michael S. Tsirkin, 2016/06/05
- [Qemu-devel] [PULL 16/25] pc: use AcpiDeviceIfClass.send_event to issue GPE events, Michael S. Tsirkin, 2016/06/05
- [Qemu-devel] [PULL 20/25] tpm: apci: cleanup TCPA table initialization, Michael S. Tsirkin, 2016/06/05
- [Qemu-devel] [PULL 19/25] acpi: cleanup bios_linker_loader_cleanup(), Michael S. Tsirkin, 2016/06/05
- [Qemu-devel] [PULL 17/25] acpi: convert linker from GArray to BIOSLinker structure, Michael S. Tsirkin, 2016/06/05
- [Qemu-devel] [PULL 23/25] pc-dimm: get memory region from ->get_memory_region(), Michael S. Tsirkin, 2016/06/05
- [Qemu-devel] [PULL 18/25] acpi: simplify bios_linker API by removing redundant 'table' argument, Michael S. Tsirkin, 2016/06/05