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[Qemu-devel] [PULL 07/20] hw/arm: new interface for devices which need t
From: |
Peter Maydell |
Subject: |
[Qemu-devel] [PULL 07/20] hw/arm: new interface for devices which need to behave differently for kernel boot |
Date: |
Tue, 8 Sep 2015 17:51:19 +0100 |
For ARM we have a little minimalist bootloader in hw/arm/boot.c which
takes the place of firmware if we're directly booting a Linux kernel.
Unfortunately a few devices need special case handling in this situation
to do the initialization which on real hardware would be done by
firmware. (In particular if we're booting a kernel in NonSecure state
then we need to make a TZ-aware GIC put all its interrupts into Group 1,
or the guest will be unable to use them.)
Create a new QOM interface which can be implemented by devices which
need to do something different from their default reset behaviour.
The callback will be called after machine initialization and before
first reset.
Suggested-by: Peter Crosthwaite <address@hidden>
Signed-off-by: Peter Maydell <address@hidden>
Reviewed-by: Edgar E. Iglesias <address@hidden>
Reviewed-by: Peter Maydell <address@hidden>
Tested-by: Edgar E. Iglesias <address@hidden>
Message-id: address@hidden
---
hw/arm/boot.c | 34 +++++++++++++++++++++++++++++++++
include/hw/arm/linux-boot-if.h | 43 ++++++++++++++++++++++++++++++++++++++++++
2 files changed, 77 insertions(+)
create mode 100644 include/hw/arm/linux-boot-if.h
diff --git a/hw/arm/boot.c b/hw/arm/boot.c
index 5b969cd..bef451b 100644
--- a/hw/arm/boot.c
+++ b/hw/arm/boot.c
@@ -10,6 +10,7 @@
#include "config.h"
#include "hw/hw.h"
#include "hw/arm/arm.h"
+#include "hw/arm/linux-boot-if.h"
#include "sysemu/sysemu.h"
#include "hw/boards.h"
#include "hw/loader.h"
@@ -555,6 +556,20 @@ static void load_image_to_fw_cfg(FWCfgState *fw_cfg,
uint16_t size_key,
fw_cfg_add_bytes(fw_cfg, data_key, data, size);
}
+static int do_arm_linux_init(Object *obj, void *opaque)
+{
+ if (object_dynamic_cast(obj, TYPE_ARM_LINUX_BOOT_IF)) {
+ ARMLinuxBootIf *albif = ARM_LINUX_BOOT_IF(obj);
+ ARMLinuxBootIfClass *albifc = ARM_LINUX_BOOT_IF_GET_CLASS(obj);
+ struct arm_boot_info *info = opaque;
+
+ if (albifc->arm_linux_init) {
+ albifc->arm_linux_init(albif, info->secure_boot);
+ }
+ }
+ return 0;
+}
+
static void arm_load_kernel_notify(Notifier *notifier, void *data)
{
CPUState *cs;
@@ -778,6 +793,12 @@ static void arm_load_kernel_notify(Notifier *notifier,
void *data)
if (info->nb_cpus > 1) {
info->write_secondary_boot(cpu, info);
}
+
+ /* Notify devices which need to fake up firmware initialization
+ * that we're doing a direct kernel boot.
+ */
+ object_child_foreach_recursive(object_get_root(),
+ do_arm_linux_init, info);
}
info->is_linux = is_linux;
@@ -803,3 +824,16 @@ void arm_load_kernel(ARMCPU *cpu, struct arm_boot_info
*info)
qemu_register_reset(do_cpu_reset, ARM_CPU(cs));
}
}
+
+static const TypeInfo arm_linux_boot_if_info = {
+ .name = TYPE_ARM_LINUX_BOOT_IF,
+ .parent = TYPE_INTERFACE,
+ .class_size = sizeof(ARMLinuxBootIfClass),
+};
+
+static void arm_linux_boot_register_types(void)
+{
+ type_register_static(&arm_linux_boot_if_info);
+}
+
+type_init(arm_linux_boot_register_types)
diff --git a/include/hw/arm/linux-boot-if.h b/include/hw/arm/linux-boot-if.h
new file mode 100644
index 0000000..aba4479
--- /dev/null
+++ b/include/hw/arm/linux-boot-if.h
@@ -0,0 +1,43 @@
+/*
+ * hw/arm/linux-boot-if.h : interface for devices which need to behave
+ * specially for direct boot of an ARM Linux kernel
+ */
+
+#ifndef HW_ARM_LINUX_BOOT_IF_H
+#define HW_ARM_LINUX_BOOT_IF_H
+
+#include "qom/object.h"
+
+#define TYPE_ARM_LINUX_BOOT_IF "arm-linux-boot-if"
+#define ARM_LINUX_BOOT_IF_CLASS(klass) \
+ OBJECT_CLASS_CHECK(ARMLinuxBootIfClass, (klass), TYPE_ARM_LINUX_BOOT_IF)
+#define ARM_LINUX_BOOT_IF_GET_CLASS(obj) \
+ OBJECT_GET_CLASS(ARMLinuxBootIfClass, (obj), TYPE_ARM_LINUX_BOOT_IF)
+#define ARM_LINUX_BOOT_IF(obj) \
+ INTERFACE_CHECK(ARMLinuxBootIf, (obj), TYPE_ARM_LINUX_BOOT_IF)
+
+typedef struct ARMLinuxBootIf {
+ /*< private >*/
+ Object parent_obj;
+} ARMLinuxBootIf;
+
+typedef struct ARMLinuxBootIfClass {
+ /*< private >*/
+ InterfaceClass parent_class;
+
+ /*< public >*/
+ /** arm_linux_init: configure the device for a direct boot
+ * of an ARM Linux kernel (so that device reset puts it into
+ * the state the kernel expects after firmware initialization,
+ * rather than the true hardware reset state). This callback is
+ * called once after machine construction is complete (before the
+ * first system reset).
+ *
+ * @obj: the object implementing this interface
+ * @secure_boot: true if we are booting Secure, false for NonSecure
+ * (or for a CPU which doesn't support TrustZone)
+ */
+ void (*arm_linux_init)(ARMLinuxBootIf *obj, bool secure_boot);
+} ARMLinuxBootIfClass;
+
+#endif
--
1.9.1
- [Qemu-devel] [PULL 15/20] target-arm: Add AArch64 access to PAR_EL1, (continued)
- [Qemu-devel] [PULL 15/20] target-arm: Add AArch64 access to PAR_EL1, Peter Maydell, 2015/09/08
- [Qemu-devel] [PULL 14/20] target-arm: Correct opc1 for AT_S12Exx, Peter Maydell, 2015/09/08
- [Qemu-devel] [PULL 13/20] target-arm: Log the target EL when taking exceptions, Peter Maydell, 2015/09/08
- [Qemu-devel] [PULL 11/20] hw/arm/virt: Enable TZ extensions on the GIC if we are using them, Peter Maydell, 2015/09/08
- [Qemu-devel] [PULL 06/20] qom: Add recursive version of object_child_for_each, Peter Maydell, 2015/09/08
- [Qemu-devel] [PULL 05/20] hw/intc/arm_gic: Actually set the active bits for active interrupts, Peter Maydell, 2015/09/08
- [Qemu-devel] [PULL 01/20] armv7m_nvic: Implement ICSR without using internal GIC state, Peter Maydell, 2015/09/08
- [Qemu-devel] [PULL 08/20] hw/intc/arm_gic_common: Configure IRQs as NS if doing direct NS kernel boot, Peter Maydell, 2015/09/08
- [Qemu-devel] [PULL 04/20] hw/intc/arm_gic: Drop running_irq and last_active arrays, Peter Maydell, 2015/09/08
- [Qemu-devel] [PULL 12/20] target-arm: Fix default_exception_el() function for the case when EL3 is not supported, Peter Maydell, 2015/09/08
- [Qemu-devel] [PULL 07/20] hw/arm: new interface for devices which need to behave differently for kernel boot,
Peter Maydell <=
- [Qemu-devel] [PULL 17/20] ahci: Separate the AHCI state structure into the header, Peter Maydell, 2015/09/08
- [Qemu-devel] [PULL 10/20] hw/arm/virt: Default to not providing TrustZone support, Peter Maydell, 2015/09/08
- [Qemu-devel] [PULL 09/20] hw/cpu/{a15mpcore, a9mpcore}: enable TrustZone in GIC if it is enabled in CPUs, Peter Maydell, 2015/09/08
- [Qemu-devel] [PULL 02/20] hw/intc/arm_gic: Running priority is group priority, not full priority, Peter Maydell, 2015/09/08
- [Qemu-devel] [PULL 03/20] hw/intc/arm_gic: Fix handling of GICC_APR<n>, GICC_NSAPR<n> registers, Peter Maydell, 2015/09/08
- Re: [Qemu-devel] [PULL 00/20] target-arm queue, Peter Maydell, 2015/09/08