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That's all we know. 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, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham 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: Graeme Gregory , peter.maydell@linaro.org, rad@semihalf.com, qemu-devel@nongnu.org, f4bug@amsat.org, leif@nuviainc.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" A difference between sbsa platform and the virt platform is PSCI is handled by ARM-TF in the sbsa platform. This means that the PSCI code there needs to communicate some of the platform power changes down to the qemu code for things like shutdown/reset control. Space has been left to extend the EC if we find other use cases in future where ARM-TF and qemu need to communicate. Signed-off-by: Graeme Gregory Reviewed-by: Leif Lindholm Tested-by: Leif Lindholm --- hw/misc/meson.build | 2 + hw/misc/sbsa_ec.c | 98 +++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 100 insertions(+) create mode 100644 hw/misc/sbsa_ec.c diff --git a/hw/misc/meson.build b/hw/misc/meson.build index 84fed0494d..e1576b81cf 100644 --- a/hw/misc/meson.build +++ b/hw/misc/meson.build @@ -97,3 +97,5 @@ specific_ss.add(when: 'CONFIG_MAC_VIA', if_true: files('m= ac_via.c')) =20 specific_ss.add(when: 'CONFIG_MIPS_CPS', if_true: files('mips_cmgcr.c', 'm= ips_cpc.c')) specific_ss.add(when: 'CONFIG_MIPS_ITU', if_true: files('mips_itu.c')) + +specific_ss.add(when: 'CONFIG_SBSA_REF', if_true: files('sbsa_ec.c')) diff --git a/hw/misc/sbsa_ec.c b/hw/misc/sbsa_ec.c new file mode 100644 index 0000000000..9a7d7f914a --- /dev/null +++ b/hw/misc/sbsa_ec.c @@ -0,0 +1,98 @@ +/* + * ARM SBSA Reference Platform Embedded Controller + * + * A device to allow PSCI running in the secure side of sbsa-ref machine + * to communicate platform power states to qemu. + * + * Copyright (c) 2020 Nuvia Inc + * Written by Graeme Gregory + * + * SPDX-License-Identifer: GPL-2.0-or-later + */ + +#include "qemu/osdep.h" +#include "qemu-common.h" +#include "qemu/log.h" +#include "hw/sysbus.h" +#include "sysemu/runstate.h" + +typedef struct { + SysBusDevice parent_obj; + MemoryRegion iomem; +} SECUREECState; + +#define TYPE_SBSA_EC "sbsa-ec" +#define SECURE_EC(obj) OBJECT_CHECK(SECUREECState, (obj), TYPE_SBSA_EC) + +enum sbsa_ec_powerstates { + SBSA_EC_CMD_POWEROFF =3D 0x01, + SBSA_EC_CMD_REBOOT =3D 0x02, +}; + +static uint64_t sbsa_ec_read(void *opaque, hwaddr offset, unsigned size) +{ + /* No use for this currently */ + qemu_log_mask(LOG_GUEST_ERROR, "sbsa-ec: no readable registers"); + return 0; +} + +static void sbsa_ec_write(void *opaque, hwaddr offset, + uint64_t value, unsigned size) +{ + if (offset =3D=3D 0) { /* PSCI machine power command register */ + switch (value) { + case SBSA_EC_CMD_POWEROFF: + qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN); + break; + case SBSA_EC_CMD_REBOOT: + qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); + break; + default: + qemu_log_mask(LOG_GUEST_ERROR, + "sbsa-ec: unknown power command"); + } + } else { + qemu_log_mask(LOG_GUEST_ERROR, "sbsa-ec: unknown EC register"); + } +} + +static const MemoryRegionOps sbsa_ec_ops =3D { + .read =3D sbsa_ec_read, + .write =3D sbsa_ec_write, + .endianness =3D DEVICE_NATIVE_ENDIAN, + .valid.min_access_size =3D 4, + .valid.max_access_size =3D 4, +}; + +static void sbsa_ec_init(Object *obj) +{ + SECUREECState *s =3D SECURE_EC(obj); + SysBusDevice *dev =3D SYS_BUS_DEVICE(obj); + + memory_region_init_io(&s->iomem, obj, &sbsa_ec_ops, s, "sbsa-ec", + 0x1000); + sysbus_init_mmio(dev, &s->iomem); +} + +static void sbsa_ec_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc =3D DEVICE_CLASS(klass); + + /* No vmstate or reset required: device has no internal state */ + dc->user_creatable =3D false; +} + +static const TypeInfo sbsa_ec_info =3D { + .name =3D TYPE_SBSA_EC, + .parent =3D TYPE_SYS_BUS_DEVICE, + .instance_size =3D sizeof(SECUREECState), + .instance_init =3D sbsa_ec_init, + .class_init =3D sbsa_ec_class_init, +}; + +static void sbsa_ec_register_type(void) +{ + type_register_static(&sbsa_ec_info); +} + +type_init(sbsa_ec_register_type); --=20 2.25.1 From nobody Sun May 19 02:06:48 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org ARC-Seal: i=1; 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Wed, 26 Aug 2020 07:20:00 -0700 (PDT) From: Graeme Gregory To: qemu-arm@nongnu.org Subject: [PATCH v2 2/2] hw/arm/sbsa-ref : Add embedded controller in secure memory Date: Wed, 26 Aug 2020 15:19:52 +0100 Message-Id: <20200826141952.136164-3-graeme@nuviainc.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200826141952.136164-1-graeme@nuviainc.com> References: <20200826141952.136164-1-graeme@nuviainc.com> 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=2a00:1450:4864:20::444; envelope-from=graeme@nuviainc.com; helo=mail-wr1-x444.google.com X-detected-operating-system: by eggs.gnu.org: No matching host in p0f cache. That's all we know. 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, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham 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: Graeme Gregory , peter.maydell@linaro.org, rad@semihalf.com, qemu-devel@nongnu.org, f4bug@amsat.org, leif@nuviainc.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" Add the previously created sbsa-ec device to the sbsa-ref machine in secure memory so the PSCI implementation in ARM-TF can access it, but not expose it to non secure firmware or OS except by via ARM-TF. Signed-off-by: Graeme Gregory Reviewed-by: Leif Lindholm Tested-by: Leif Lindholm --- hw/arm/sbsa-ref.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/hw/arm/sbsa-ref.c b/hw/arm/sbsa-ref.c index 2a7d9a61fc..8614709bfb 100644 --- a/hw/arm/sbsa-ref.c +++ b/hw/arm/sbsa-ref.c @@ -62,6 +62,7 @@ enum { SBSA_CPUPERIPHS, SBSA_GIC_DIST, SBSA_GIC_REDIST, + SBSA_SECURE_EC, SBSA_SMMU, SBSA_UART, SBSA_RTC, @@ -107,6 +108,7 @@ static const MemMapEntry sbsa_ref_memmap[] =3D { [SBSA_CPUPERIPHS] =3D { 0x40000000, 0x00040000 }, [SBSA_GIC_DIST] =3D { 0x40060000, 0x00010000 }, [SBSA_GIC_REDIST] =3D { 0x40080000, 0x04000000 }, + [SBSA_SECURE_EC] =3D { 0x50000000, 0x00001000 }, [SBSA_UART] =3D { 0x60000000, 0x00001000 }, [SBSA_RTC] =3D { 0x60010000, 0x00001000 }, [SBSA_GPIO] =3D { 0x60020000, 0x00001000 }, @@ -585,6 +587,16 @@ static void *sbsa_ref_dtb(const struct arm_boot_info *= binfo, int *fdt_size) return board->fdt; } =20 +static void create_secure_ec(MemoryRegion *mem) +{ + hwaddr base =3D sbsa_ref_memmap[SBSA_SECURE_EC].base; + DeviceState *dev =3D qdev_new("sbsa-ec"); + SysBusDevice *s =3D SYS_BUS_DEVICE(dev); + + memory_region_add_subregion(mem, base, + sysbus_mmio_get_region(s, 0)); +} + static void sbsa_ref_init(MachineState *machine) { unsigned int smp_cpus =3D machine->smp.cpus; @@ -708,6 +720,8 @@ static void sbsa_ref_init(MachineState *machine) =20 create_pcie(sms); =20 + create_secure_ec(secure_sysmem); + sms->bootinfo.ram_size =3D machine->ram_size; sms->bootinfo.nb_cpus =3D smp_cpus; sms->bootinfo.board_id =3D -1; --=20 2.25.1