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Tsirkin" , Paolo Bonzini , Richard Henderson Subject: [PATCH v1 04/23] q35/xen: Add Xen platform device support for Q35 Date: Tue, 20 Jun 2023 13:24:38 -0400 Message-Id: <46c76ae21764ee6747ee42642ee98d981f42db61.1687278381.git.jupham125@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::1129; envelope-from=jupham125@gmail.com; helo=mail-yw1-x1129.google.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_ENVFROM_END_DIGIT=0.25, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-Mailman-Approved-At: Tue, 20 Jun 2023 15:45:55 -0400 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @gmail.com) X-ZM-MESSAGEID: 1687290482404100009 Content-Type: text/plain; charset="utf-8" Current Xen/QEMU method to control Xen Platform device on i440 is a bit odd -- enabling/disabling Xen platform device actually modifies the QEMU emulated machine type, namely xenfv <--> pc. In order to avoid multiplying machine types, use a new way to control Xen Platform device for QEMU -- "xen-platform-dev" machine property (bool). To maintain backward compatibility with existing Xen/QEMU setups, this is only applicable to q35 machine currently. i440 emulation still uses the old method (i.e. xenfv/pc machine selection) to control Xen Platform device, this may be changed later to xen-platform-dev property as well. This way we can use a single machine type (q35) and change just xen-platform-dev value to on/off to control Xen platform device. Signed-off-by: Alexey Gerasimenko Signed-off-by: Joel Upham --- hw/core/machine.c | 19 +++++++++++++++++++ hw/i386/pc_q35.c | 20 +++++++++++++++++++- include/hw/boards.h | 1 + qemu-options.hx | 1 + 4 files changed, 40 insertions(+), 1 deletion(-) diff --git a/hw/core/machine.c b/hw/core/machine.c index 1000406211..703138d2ec 100644 --- a/hw/core/machine.c +++ b/hw/core/machine.c @@ -455,6 +455,20 @@ static void machine_set_graphics(Object *obj, bool val= ue, Error **errp) ms->enable_graphics =3D value; } =20 +static bool machine_get_xen_platform_dev(Object *obj, Error **errp) +{ + MachineState *ms =3D MACHINE(obj); + + return ms->xen_platform_dev; +} + +static void machine_set_xen_platform_dev(Object *obj, bool value, Error **= errp) +{ + MachineState *ms =3D MACHINE(obj); + + ms->xen_platform_dev =3D value; +} + static char *machine_get_firmware(Object *obj, Error **errp) { MachineState *ms =3D MACHINE(obj); @@ -1004,6 +1018,11 @@ static void machine_class_init(ObjectClass *oc, void= *data) object_class_property_set_description(oc, "graphics", "Set on/off to enable/disable graphics emulation"); =20 + object_class_property_add_bool(oc, "xen-platform-dev", + machine_get_xen_platform_dev, machine_set_xen_platform_dev); + object_class_property_set_description(oc, "xen-platform-dev", + "Set on/off to enable/disable Xen Platform device"); + object_class_property_add_str(oc, "firmware", machine_get_firmware, machine_set_firmware); object_class_property_set_description(oc, "firmware", diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c index 6155427e48..789a23ce6b 100644 --- a/hw/i386/pc_q35.c +++ b/hw/i386/pc_q35.c @@ -57,10 +57,24 @@ #include "hw/hyperv/vmbus-bridge.h" #include "hw/mem/nvdimm.h" #include "hw/i386/acpi-build.h" +#include "hw/xen/xen-x86.h" +#include "sysemu/xen.h" =20 /* ICH9 AHCI has 6 ports */ #define MAX_SATA_PORTS 6 =20 +static void q35_xen_hvm_init(MachineState *machine) +{ + PCMachineState *pcms =3D PC_MACHINE(machine); + + if (xen_enabled()) { + /* check if Xen Platform device is enabled */ + if (machine->xen_platform_dev) { + pci_create_simple(pcms->bus, -1, "xen-platform"); + } + } +} + struct ehci_companions { const char *name; int func; @@ -273,8 +287,12 @@ static void pc_q35_init(MachineState *machine) for (i =3D 0; i < IOAPIC_NUM_PINS; i++) { qdev_connect_gpio_out_named(lpc_dev, ICH9_GPIO_GSI, i, x86ms->gsi[= i]); } - isa_bus =3D ISA_BUS(qdev_get_child_bus(lpc_dev, "isa.0")); =20 + if (xen_enabled()) { + q35_xen_hvm_init(machine); + } + + isa_bus =3D ISA_BUS(qdev_get_child_bus(lpc_dev, "isa.0")); if (x86ms->pic =3D=3D ON_OFF_AUTO_ON || x86ms->pic =3D=3D ON_OFF_AUTO_= AUTO) { pc_i8259_create(isa_bus, gsi_state->i8259_irq); } diff --git a/include/hw/boards.h b/include/hw/boards.h index a385010909..0b021f0764 100644 --- a/include/hw/boards.h +++ b/include/hw/boards.h @@ -339,6 +339,7 @@ struct MachineState { bool mem_merge; bool usb; bool usb_disabled; + bool xen_platform_dev; char *firmware; bool iommu; bool suppress_vmdesc; diff --git a/qemu-options.hx b/qemu-options.hx index b37eb9662b..ea018257da 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -30,6 +30,7 @@ DEF("machine", HAS_ARG, QEMU_OPTION_machine, \ " vmport=3Don|off|auto controls emulation of vmport (de= fault: auto)\n" " dump-guest-core=3Don|off include guest memory in a co= re dump (default=3Don)\n" " mem-merge=3Don|off controls memory merge support (def= ault: on)\n" + " xen-platform-dev=3Don|off controls Xen Platform devic= e (default=3Doff)\n" " aes-key-wrap=3Don|off controls support for AES key wr= apping (default=3Don)\n" " dea-key-wrap=3Don|off controls support for DEA key wr= apping (default=3Don)\n" " suppress-vmdesc=3Don|off disables self-describing mig= ration (default=3Doff)\n" --=20 2.34.1