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qemu/hw-arm-MADT-Tbl-change-to-size-the-guest-with-possib.patch
Jiabo Feng c025e9059a QEMU update to version 8.2.0-6: 
- coro: support live patch for libcare
- tests/acpi: Update expected ACPI tables for vcpu hotplug(update BinDir)
- arm/virt: Require mc->has_hotpluggable_cpus for cold-plugged vcpu
- arm/virt: Consider has_ged when set mc->has_hotpluggable_cpus
- arm/virt-acpi: Require possible_cpu_arch_ids for build_cpus_aml()
- acpi/ged: Remove cpuhp field of ged
- acpi/ged: Init cpu hotplug only when machine support it
- intc/gicv3: Fixes for vcpu hotplug
- arm/kvm: Set psci smccc filter only with vcpu hotplug
- accel/kvm: Use correct id for parked vcpu
- arm/virt: Fix adjudgement of core_id for vcpu hotplugged
- arm/virt.c: Convey local_err when set psci-conduit
- system/cpus: Fix resume_all_vcpus() under vCPU hotplug condition
- system/cpus: Fix pause_all_vcpus() under concurrent environment
- acpi/cpu: Fix cpu_hotplug_hw_init()
- arm/cpu: Some fixes for arm_cpu_unrealizefn()
- system/physmem: Fix possible double free when destroy cpu as
- hw/arm/virt: Expose cold-booted CPUs as MADT GICC Enabled
- tcg/mttcg: enable threads to unregister in tcg_ctxs[]
- hw/arm: Support hotplug capability check using _OSC method
- target/arm/kvm,tcg: Register/Handle SMCCC hypercall exits to VMM/Qemu
- target/arm/kvm: Write CPU state back to KVM on reset
- target/arm: Add support of *unrealize* ARMCPU during vCPU Hot-unplug
- physmem,gdbstub: Common helping funcs/changes to *unrealize* vCPU
- hw/arm: Changes required for reset and to support next boot
- arm/virt: Update the guest(via GED) about CPU hot-(un)plug events
- hw/intc/arm-gicv3*: Changes required to (re)init the vCPU register info
- hw/arm,gicv3: Changes to update GIC with vCPU hot-plug notification
- arm/virt: Changes to (un)wire GICC<->vCPU IRQs during hot-(un)plug
- arm/virt: Add/update basic hot-(un)plug framework
- hw/acpi: Update ACPI GED framework to support vCPU Hotplug
- arm/virt: Release objects for *disabled* possible vCPUs after init
- hw/acpi: Make _MAT method optional
- hw/arm: MADT Tbl change to size the guest with possible vCPUs
- hw/acpi: Update GED _EVT method AML with cpu scan
- hw/acpi: ACPI/AML Changes to reflect the correct _STA.{PRES,ENA} Bits to Guest
- arm/virt: Make ARM vCPU *present* status ACPI *persistent*
- arm/virt/acpi: Build CPUs AML with CPU Hotplug support
- tests/acpi/bios-tables-test: Allow changes to virt/DSDT file
- acpi/cpu: Add cpu_cppc building support
- arm/virt/acpi: Factor out CPPC building from DSDT CPU aml
- hw/acpi: Update CPUs AML with cpu-(ctrl)dev change
- arm/virt: Create GED dev before *disabled* CPU Objs are destroyed
- arm/virt: Add cpu hotplug events to GED during creation
- hw/acpi: Init GED framework with cpu hotplug events
- hw/acpi: Use qemu_present_cpu() API in ACPI CPU hotplug init
- hw/acpi: Add ACPI CPU hotplug init stub
- arm/acpi: Enable ACPI support for vcpu hotplug
- hw/acpi: Move CPU ctrl-dev MMIO region len macro to common header file
- arm/virt: Init PMU at host for all possible vcpus
- arm/virt,gicv3: Changes to pre-size GIC with possible vcpus @machine init
- arm/virt,kvm: Pre-create disabled possible vCPUs @machine init
- accel/kvm: Extract common KVM vCPU {creation,parking} code
- arm/virt,target/arm: Machine init time change common to vCPU {cold|hot}-plug
- hw/arm/virt: Move setting of common CPU properties in a function
- cpus-common: Add common CPU utility for possible vCPUs
- arm/virt,target/arm: Add new ARMCPU {socket,cluster,core,thread}-id property

Signed-off-by: Jiabo Feng <fengjiabo1@huawei.com>
2024-04-10 21:01:15 +08:00

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From 8e1b8d624128523654786953b381557c82654a57 Mon Sep 17 00:00:00 2001
From: Salil Mehta <salil.mehta@huawei.com>
Date: Wed, 6 May 2020 18:03:11 +0100
Subject: [PATCH] hw/arm: MADT Tbl change to size the guest with possible vCPUs
Changes required during building of MADT Table by QEMU to accomodate disabled
possible vCPUs. This info shall be used by the guest kernel to size up its
resources during boot time. This pre-sizing of the guest kernel done on
possible vCPUs will facilitate hotplug of the disabled vCPUs.
This change also caters ACPI MADT GIC CPU Interface flag related changes
recently introduced in the UEFI ACPI 6.5 Specification which allows deferred
virtual CPU online'ing in the Guest Kernel.
Link: https://uefi.org/specs/ACPI/6.5/05_ACPI_Software_Programming_Model.html#gic-cpu-interface-gicc-structure
Co-developed-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Co-developed-by: Keqian Zhu <zhukeqian1@huawei.com>
Signed-off-by: Keqian Zhu <zhukeqian1@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
---
hw/arm/virt-acpi-build.c | 36 ++++++++++++++++++++++++++++++------
1 file changed, 30 insertions(+), 6 deletions(-)
diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
index d88f3cded1..2870c1ec5a 100644
--- a/hw/arm/virt-acpi-build.c
+++ b/hw/arm/virt-acpi-build.c
@@ -779,6 +779,29 @@ static void build_append_gicr(GArray *table_data, uint64_t base, uint32_t size)
build_append_int_noprefix(table_data, size, 4); /* Discovery Range Length */
}
+static uint32_t virt_acpi_get_gicc_flags(CPUState *cpu)
+{
+ MachineClass *mc = MACHINE_GET_CLASS(qdev_get_machine());
+
+ /* can only exist in 'enabled' state */
+ if (!mc->has_hotpluggable_cpus) {
+ return 1;
+ }
+
+ /*
+ * ARM GIC CPU Interface can be 'online-capable' or 'enabled' at boot
+ * We MUST set 'online-capable' Bit for all hotpluggable CPUs except the
+ * first/boot CPU. Cold-booted CPUs without 'Id' can also be unplugged.
+ * Though as-of-now this is only used as a debugging feature.
+ *
+ * UEFI ACPI Specification 6.5
+ * Section: 5.2.12.14. GIC CPU Interface (GICC) Structure
+ * Table: 5.37 GICC CPU Interface Flags
+ * Link: https://uefi.org/specs/ACPI/6.5
+ */
+ return cpu && !cpu->cpu_index ? 1 : (1 << 3);
+}
+
static void
build_madt(GArray *table_data, BIOSLinker *linker, VirtMachineState *vms)
{
@@ -805,12 +828,13 @@ build_madt(GArray *table_data, BIOSLinker *linker, VirtMachineState *vms)
build_append_int_noprefix(table_data, vms->gic_version, 1);
build_append_int_noprefix(table_data, 0, 3); /* Reserved */
- for (i = 0; i < MACHINE(vms)->smp.cpus; i++) {
- ARMCPU *armcpu = ARM_CPU(qemu_get_cpu(i));
+ for (i = 0; i < MACHINE(vms)->smp.max_cpus; i++) {
+ CPUState *cpu = qemu_get_possible_cpu(i);
uint64_t physical_base_address = 0, gich = 0, gicv = 0;
uint32_t vgic_interrupt = vms->virt ? ARCH_GIC_MAINT_IRQ : 0;
- uint32_t pmu_interrupt = arm_feature(&armcpu->env, ARM_FEATURE_PMU) ?
- VIRTUAL_PMU_IRQ : 0;
+ uint32_t pmu_interrupt = vms->pmu ? VIRTUAL_PMU_IRQ : 0;
+ uint32_t flags = virt_acpi_get_gicc_flags(cpu);
+ uint64_t mpidr = qemu_get_cpu_archid(i);
if (vms->gic_version == VIRT_GIC_VERSION_2) {
physical_base_address = memmap[VIRT_GIC_CPU].base;
@@ -825,7 +849,7 @@ build_madt(GArray *table_data, BIOSLinker *linker, VirtMachineState *vms)
build_append_int_noprefix(table_data, i, 4); /* GIC ID */
build_append_int_noprefix(table_data, i, 4); /* ACPI Processor UID */
/* Flags */
- build_append_int_noprefix(table_data, 1, 4); /* Enabled */
+ build_append_int_noprefix(table_data, flags, 4);
/* Parking Protocol Version */
build_append_int_noprefix(table_data, 0, 4);
/* Performance Interrupt GSIV */
@@ -839,7 +863,7 @@ build_madt(GArray *table_data, BIOSLinker *linker, VirtMachineState *vms)
build_append_int_noprefix(table_data, vgic_interrupt, 4);
build_append_int_noprefix(table_data, 0, 8); /* GICR Base Address*/
/* MPIDR */
- build_append_int_noprefix(table_data, armcpu->mp_affinity, 8);
+ build_append_int_noprefix(table_data, mpidr, 8);
/* Processor Power Efficiency Class */
build_append_int_noprefix(table_data, 0, 1);
/* Reserved */
--
2.27.0
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