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[79.182.31.92]) by smtp.gmail.com with ESMTPSA id t4sm616803wmf.4.2020.07.08.09.52.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 08 Jul 2020 09:52:24 -0700 (PDT) Date: Wed, 8 Jul 2020 12:52:20 -0400 From: "Michael S. Tsirkin" To: Gerd Hoffmann Subject: Re: [PATCH v5 08/20] microvm/acpi: add minimal acpi support Message-ID: <20200708121614-mutt-send-email-mst@kernel.org> References: <20200707125356.32450-1-kraxel@redhat.com> <20200707125356.32450-9-kraxel@redhat.com> MIME-Version: 1.0 In-Reply-To: <20200707125356.32450-9-kraxel@redhat.com> Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=mst@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Received-SPF: pass client-ip=207.211.31.81; envelope-from=mst@redhat.com; helo=us-smtp-delivery-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/07 17:25:09 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -30 X-Spam_score: -3.1 X-Spam_bar: --- X-Spam_report: (-3.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Laurent Vivier , Peter Maydell , Thomas Huth , Eduardo Habkost , Sergio Lopez , qemu-devel@nongnu.org, Shannon Zhao , qemu-arm@nongnu.org, Igor Mammedov , Paolo Bonzini , Richard Henderson Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Tue, Jul 07, 2020 at 02:53:44PM +0200, Gerd Hoffmann wrote: > $subject says all. Can be controlled using -M microvm,acpi=on/off. > > Signed-off-by: Gerd Hoffmann Overall I don't see bugs here. Some comments are bit confusing and I point that out below. With that addressed: Reviewed-by: Michael S. Tsirkin > --- > hw/i386/acpi-microvm.h | 8 ++ > include/hw/i386/microvm.h | 9 ++ > hw/i386/acpi-microvm.c | 195 ++++++++++++++++++++++++++++++++++++++ > hw/i386/microvm.c | 40 ++++++++ > hw/i386/Kconfig | 1 + > hw/i386/Makefile.objs | 1 + > 6 files changed, 254 insertions(+) > create mode 100644 hw/i386/acpi-microvm.h > create mode 100644 hw/i386/acpi-microvm.c > > diff --git a/hw/i386/acpi-microvm.h b/hw/i386/acpi-microvm.h > new file mode 100644 > index 000000000000..dfe853690e15 > --- /dev/null > +++ b/hw/i386/acpi-microvm.h > @@ -0,0 +1,8 @@ > +#ifndef HW_I386_ACPI_MICROVM_H > +#define HW_I386_ACPI_MICROVM_H > + > +#include "hw/i386/microvm.h" > + > +void acpi_setup_microvm(MicrovmMachineState *mms); > + > +#endif > diff --git a/include/hw/i386/microvm.h b/include/hw/i386/microvm.h > index 03e735723726..b6e0d4395af7 100644 > --- a/include/hw/i386/microvm.h > +++ b/include/hw/i386/microvm.h > @@ -24,12 +24,18 @@ > > #include "hw/boards.h" > #include "hw/i386/x86.h" > +#include "hw/acpi/acpi_dev_interface.h" > > /* Platform virtio definitions */ > #define VIRTIO_MMIO_BASE 0xfeb00000 > #define VIRTIO_NUM_TRANSPORTS 8 > #define VIRTIO_CMDLINE_MAXLEN 64 > > +#define GED_MMIO_BASE 0xfea00000 > +#define GED_MMIO_BASE_MEMHP (GED_MMIO_BASE + 0x100) > +#define GED_MMIO_BASE_REGS (GED_MMIO_BASE + 0x200) > +#define GED_MMIO_IRQ 9 > + > /* Machine type options */ > #define MICROVM_MACHINE_PIT "pit" > #define MICROVM_MACHINE_PIC "pic" > @@ -58,6 +64,9 @@ typedef struct { > /* Machine state */ > uint32_t virtio_irq_base; > bool kernel_cmdline_fixed; > + Notifier machine_done; > + Notifier powerdown_req; > + AcpiDeviceIf *acpi_dev; > } MicrovmMachineState; > > #define TYPE_MICROVM_MACHINE MACHINE_TYPE_NAME("microvm") > diff --git a/hw/i386/acpi-microvm.c b/hw/i386/acpi-microvm.c > new file mode 100644 > index 000000000000..6c4178caefee > --- /dev/null > +++ b/hw/i386/acpi-microvm.c > @@ -0,0 +1,195 @@ > +/* Support for generating ACPI tables and passing them to Guests > + * > + * Copyright (C) 2008-2010 Kevin O'Connor > + * Copyright (C) 2006 Fabrice Bellard > + * Copyright (C) 2013 Red Hat Inc > + * > + * Author: Michael S. Tsirkin > + * > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License as published by > + * the Free Software Foundation; either version 2 of the License, or > + * (at your option) any later version. > + > + * This program is distributed in the hope that it will be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + * GNU General Public License for more details. > + > + * You should have received a copy of the GNU General Public License along > + * with this program; if not, see . > + */ > + > +#include "qemu/osdep.h" > +#include "qapi/error.h" > + > +#include "exec/memory.h" > +#include "hw/acpi/acpi.h" > +#include "hw/acpi/aml-build.h" > +#include "hw/acpi/bios-linker-loader.h" > +#include "hw/acpi/generic_event_device.h" > +#include "hw/acpi/utils.h" > +#include "hw/boards.h" > +#include "hw/i386/fw_cfg.h" > +#include "hw/i386/microvm.h" > + > +#include "acpi-common.h" > +#include "acpi-microvm.h" > + > +static void > +build_dsdt_microvm(GArray *table_data, BIOSLinker *linker, > + MicrovmMachineState *mms) > +{ > + X86MachineState *x86ms = X86_MACHINE(mms); > + Aml *dsdt, *sb_scope, *scope, *pkg; > + bool ambiguous; > + Object *isabus; > + > + isabus = object_resolve_path_type("", TYPE_ISA_BUS, &ambiguous); > + assert(isabus); > + assert(!ambiguous); > + > + dsdt = init_aml_allocator(); > + > + /* Reserve space for header */ > + acpi_data_push(dsdt->buf, sizeof(AcpiTableHeader)); > + > + sb_scope = aml_scope("_SB"); > + fw_cfg_add_acpi_dsdt(sb_scope, x86ms->fw_cfg); > + isa_build_aml(ISA_BUS(isabus), sb_scope); > + build_ged_aml(sb_scope, GED_DEVICE, HOTPLUG_HANDLER(mms->acpi_dev), > + GED_MMIO_IRQ, AML_SYSTEM_MEMORY, GED_MMIO_BASE); > + acpi_dsdt_add_power_button(sb_scope); > + aml_append(dsdt, sb_scope); > + > + scope = aml_scope("\\"); > + pkg = aml_package(4); > + aml_append(pkg, aml_int(5)); /* SLEEP_CONTROL_REG.SLP_TYP */ I'm not sure what does the comment refer to here. Does this 5 match the value IO handler tests against? A macro might make sense then ... Below is from "7.3.4 System \_Sx states" right? > + aml_append(pkg, aml_int(0)); /* ignored */ > + aml_append(pkg, aml_int(0)); /* reserved */ > + aml_append(pkg, aml_int(0)); /* reserved */ > + aml_append(scope, aml_name_decl("_S5", pkg)); > + aml_append(dsdt, scope); > + > + /* copy AML table into ACPI tables blob and patch header there */ > + g_array_append_vals(table_data, dsdt->buf->data, dsdt->buf->len); > + build_header(linker, table_data, > + (void *)(table_data->data + table_data->len - dsdt->buf->len), > + "DSDT", dsdt->buf->len, 2, NULL, NULL); /* DSDT always uses revision 2 */. > + free_aml_allocator(); > +} > + > +static void acpi_build_microvm(AcpiBuildTables *tables, > + MicrovmMachineState *mms) > +{ > + MachineState *machine = MACHINE(mms); > + GArray *table_offsets; > + GArray *tables_blob = tables->table_data; > + unsigned dsdt, xsdt; > + AcpiFadtData pmfadt = { > + /* > + * minimum version for ACPI_FADT_F_HW_REDUCED_ACPI, > + * see acpi spec "4.1 Hardware-Reduced ACPI" Spec version - I'm guessing ACPI spec 5.0. And I think here is where you refer to Table 5-34 Fixed ACPI Description Table (FADT) Format > + */ > + .rev = 5, > + .minor_ver = 1, So 5.1 I am guessing just copied from virt/arm? Or do you know why? If not all we can say is /* ACPI v5.1 */ like ARM does, rest is guesswork ... > + > + .flags = ((1 << ACPI_FADT_F_HW_REDUCED_ACPI) | > + (1 << ACPI_FADT_F_RESET_REG_SUP)), > + > + /* Table 5-33 FADT Format -- SLEEP_CONTROL_REG */ You need to use the earliest spec version that includes a specific feature - and document which one it is. In version 5 table 5-33 is XSDT. Generally it took me a while to understand this comment. It makes it look like one needs to find SLEEP_CONTROL_REG in Table 5-33 You mean the address refers to SLEEP_CONTROL_REG. So put the comment near the address pls. But the main poit is AcpiFadtData actually has nothing to do with FADT format. It's an abstracted API > + .sleep_ctl = { > + .space_id = AML_AS_SYSTEM_MEMORY, > + .bit_width = 8, > + .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_SLEEP_CTL, > + }, > + > + /* Table 5-33 FADT Format -- SLEEP_STATUS_REG */ > + .sleep_sts = { > + .space_id = AML_AS_SYSTEM_MEMORY, > + .bit_width = 8, > + .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_SLEEP_STS, > + }, > + > + /* Table 5-33 FADT Format -- RESET_REG */ > + .reset_reg = { > + .space_id = AML_AS_SYSTEM_MEMORY, > + .bit_width = 8, > + .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_RESET, > + }, > + > + /* Table 5-33 FADT Format -- RESET_VALUE */ > + .reset_val = ACPI_GED_RESET_VALUE, > + }; > + > + table_offsets = g_array_new(false, true /* clear */, > + sizeof(uint32_t)); > + bios_linker_loader_alloc(tables->linker, > + ACPI_BUILD_TABLE_FILE, tables_blob, > + 64 /* Ensure FACS is aligned */, > + false /* high memory */); > + > + dsdt = tables_blob->len; > + build_dsdt_microvm(tables_blob, tables->linker, mms); > + > + pmfadt.dsdt_tbl_offset = &dsdt; > + pmfadt.xdsdt_tbl_offset = &dsdt; > + acpi_add_table(table_offsets, tables_blob); > + build_fadt(tables_blob, tables->linker, &pmfadt, NULL, NULL); > + > + acpi_add_table(table_offsets, tables_blob); > + acpi_build_madt(tables_blob, tables->linker, X86_MACHINE(machine), > + mms->acpi_dev, false); > + > + xsdt = tables_blob->len; > + build_xsdt(tables_blob, tables->linker, table_offsets, NULL, NULL); > + > + /* RSDP is in FSEG memory, so allocate it separately */ > + { > + AcpiRsdpData rsdp_data = { > + /* Table 5-27 RSDP Structure */ RSDP is since ACPI 2.0, table number there is different. > + .revision = 2, /* rev2 needed for xsdt support */ > + .oem_id = ACPI_BUILD_APPNAME6, > + .xsdt_tbl_offset = &xsdt, > + .rsdt_tbl_offset = NULL, > + }; > + build_rsdp(tables->rsdp, tables->linker, &rsdp_data); > + } > + > + /* Cleanup memory that's no longer used. */ > + g_array_free(table_offsets, true); > +} > + > +static void acpi_build_no_update(void *build_opaque) > +{ > + /* nothing, microvm tables don't change at runtime */ > +} > + > +void acpi_setup_microvm(MicrovmMachineState *mms) > +{ > + X86MachineState *x86ms = X86_MACHINE(mms); > + AcpiBuildTables tables; > + > + assert(x86ms->fw_cfg); > + > + if (!x86_machine_is_acpi_enabled(x86ms)) { > + return; > + } > + > + acpi_build_tables_init(&tables); > + acpi_build_microvm(&tables, mms); > + > + /* Now expose it all to Guest */ > + acpi_add_rom_blob(acpi_build_no_update, NULL, > + tables.table_data, > + ACPI_BUILD_TABLE_FILE, > + ACPI_BUILD_TABLE_MAX_SIZE); > + acpi_add_rom_blob(acpi_build_no_update, NULL, > + tables.linker->cmd_blob, > + "etc/table-loader", 0); > + acpi_add_rom_blob(acpi_build_no_update, NULL, > + tables.rsdp, > + ACPI_BUILD_RSDP_FILE, 0); > + > + acpi_build_tables_cleanup(&tables, false); > +} > diff --git a/hw/i386/microvm.c b/hw/i386/microvm.c > index ab6ee6c67b1a..75eca7306b11 100644 > --- a/hw/i386/microvm.c > +++ b/hw/i386/microvm.c > @@ -26,6 +26,8 @@ > #include "sysemu/cpus.h" > #include "sysemu/numa.h" > #include "sysemu/reset.h" > +#include "sysemu/runstate.h" > +#include "acpi-microvm.h" > > #include "hw/loader.h" > #include "hw/irq.h" > @@ -41,6 +43,8 @@ > #include "hw/i386/e820_memory_layout.h" > #include "hw/i386/fw_cfg.h" > #include "hw/virtio/virtio-mmio.h" > +#include "hw/acpi/acpi.h" > +#include "hw/acpi/generic_event_device.h" > > #include "cpu.h" > #include "elf.h" > @@ -129,6 +133,17 @@ static void microvm_devices_init(MicrovmMachineState *mms) > } > > /* Optional and legacy devices */ > + if (x86_machine_is_acpi_enabled(x86ms)) { > + DeviceState *dev = qdev_new(TYPE_ACPI_GED_X86); > + qdev_prop_set_uint32(dev, "ged-event", ACPI_GED_PWR_DOWN_EVT); > + sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, GED_MMIO_BASE); > + /* sysbus_mmio_map(SYS_BUS_DEVICE(dev), 1, GED_MMIO_BASE_MEMHP); */ > + sysbus_mmio_map(SYS_BUS_DEVICE(dev), 2, GED_MMIO_BASE_REGS); > + sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, > + x86ms->gsi[GED_MMIO_IRQ]); > + sysbus_realize(SYS_BUS_DEVICE(dev), &error_fatal); > + mms->acpi_dev = ACPI_DEVICE_IF(dev); > + } > > if (mms->pic == ON_OFF_AUTO_ON || mms->pic == ON_OFF_AUTO_AUTO) { > qemu_irq *i8259; > @@ -438,6 +453,26 @@ static void microvm_machine_set_auto_kernel_cmdline(Object *obj, bool value, > mms->auto_kernel_cmdline = value; > } > > +static void microvm_machine_done(Notifier *notifier, void *data) > +{ > + MicrovmMachineState *mms = container_of(notifier, MicrovmMachineState, > + machine_done); > + > + acpi_setup_microvm(mms); > +} > + > +static void microvm_powerdown_req(Notifier *notifier, void *data) > +{ > + MicrovmMachineState *mms = container_of(notifier, MicrovmMachineState, > + powerdown_req); > + > + if (mms->acpi_dev) { > + Object *obj = OBJECT(mms->acpi_dev); > + AcpiDeviceIfClass *adevc = ACPI_DEVICE_IF_GET_CLASS(obj); > + adevc->send_event(mms->acpi_dev, ACPI_POWER_DOWN_STATUS); > + } > +} > + > static void microvm_machine_initfn(Object *obj) > { > MicrovmMachineState *mms = MICROVM_MACHINE(obj); > @@ -452,6 +487,11 @@ static void microvm_machine_initfn(Object *obj) > > /* State */ > mms->kernel_cmdline_fixed = false; > + > + mms->machine_done.notify = microvm_machine_done; > + qemu_add_machine_init_done_notifier(&mms->machine_done); > + mms->powerdown_req.notify = microvm_powerdown_req; > + qemu_register_powerdown_notifier(&mms->powerdown_req); > } > > static void microvm_class_init(ObjectClass *oc, void *data) > diff --git a/hw/i386/Kconfig b/hw/i386/Kconfig > index c93f32f6579d..be746bcb49eb 100644 > --- a/hw/i386/Kconfig > +++ b/hw/i386/Kconfig > @@ -102,6 +102,7 @@ config MICROVM > select I8259 > select MC146818RTC > select VIRTIO_MMIO > + select ACPI_HW_REDUCED > > config X86_IOMMU > bool > diff --git a/hw/i386/Makefile.objs b/hw/i386/Makefile.objs > index 622739305882..bbb2fe78f3cd 100644 > --- a/hw/i386/Makefile.objs > +++ b/hw/i386/Makefile.objs > @@ -19,3 +19,4 @@ obj-y += kvmvapic.o > obj-$(CONFIG_ACPI) += acpi-common.o > obj-$(CONFIG_ACPI_HW_REDUCED) += generic_event_device_x86.o > obj-$(CONFIG_PC) += acpi-build.o > +obj-$(CONFIG_MICROVM) += acpi-microvm.o > -- > 2.18.4