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ce2918cbc3
The qemu coding standard is to use CamelCase for type and structure names, and the pseries code follows that... sort of. There are quite a lot of places where we bend the rules in order to preserve the capitalization of internal acronyms like "PHB", "TCE", "DIMM" and most commonly "sPAPR". That was a bad idea - it frequently leads to names ending up with hard to read clusters of capital letters, and means they don't catch the eye as type identifiers, which is kind of the point of the CamelCase convention in the first place. In short, keeping type identifiers look like CamelCase is more important than preserving standard capitalization of internal "words". So, this patch renames a heap of spapr internal type names to a more standard CamelCase. In addition to case changes, we also make some other identifier renames: VIOsPAPR* -> SpaprVio* The reverse word ordering was only ever used to mitigate the capital cluster, so revert to the natural ordering. VIOsPAPRVTYDevice -> SpaprVioVty VIOsPAPRVLANDevice -> SpaprVioVlan Brevity, since the "Device" didn't add useful information sPAPRDRConnector -> SpaprDrc sPAPRDRConnectorClass -> SpaprDrcClass Brevity, and makes it clearer this is the same thing as a "DRC" mentioned in many other places in the code This is 100% a mechanical search-and-replace patch. It will, however, conflict with essentially any and all outstanding patches touching the spapr code. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
278 lines
7.5 KiB
C
278 lines
7.5 KiB
C
#include "qemu/osdep.h"
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#include "qemu/error-report.h"
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#include "qapi/error.h"
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#include "qemu-common.h"
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#include "cpu.h"
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#include "hw/qdev.h"
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#include "chardev/char-fe.h"
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#include "hw/ppc/spapr.h"
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#include "hw/ppc/spapr_vio.h"
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#define VTERM_BUFSIZE 16
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typedef struct SpaprVioVty {
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SpaprVioDevice sdev;
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CharBackend chardev;
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uint32_t in, out;
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uint8_t buf[VTERM_BUFSIZE];
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} SpaprVioVty;
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#define TYPE_VIO_SPAPR_VTY_DEVICE "spapr-vty"
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#define VIO_SPAPR_VTY_DEVICE(obj) \
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OBJECT_CHECK(SpaprVioVty, (obj), TYPE_VIO_SPAPR_VTY_DEVICE)
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static int vty_can_receive(void *opaque)
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{
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SpaprVioVty *dev = VIO_SPAPR_VTY_DEVICE(opaque);
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return VTERM_BUFSIZE - (dev->in - dev->out);
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}
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static void vty_receive(void *opaque, const uint8_t *buf, int size)
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{
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SpaprVioVty *dev = VIO_SPAPR_VTY_DEVICE(opaque);
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int i;
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if ((dev->in == dev->out) && size) {
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/* toggle line to simulate edge interrupt */
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qemu_irq_pulse(spapr_vio_qirq(&dev->sdev));
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}
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for (i = 0; i < size; i++) {
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if (dev->in - dev->out >= VTERM_BUFSIZE) {
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static bool reported;
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if (!reported) {
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error_report("VTY input buffer exhausted - characters dropped."
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" (input size = %i)", size);
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reported = true;
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}
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break;
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}
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dev->buf[dev->in++ % VTERM_BUFSIZE] = buf[i];
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}
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}
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static int vty_getchars(SpaprVioDevice *sdev, uint8_t *buf, int max)
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{
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SpaprVioVty *dev = VIO_SPAPR_VTY_DEVICE(sdev);
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int n = 0;
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while ((n < max) && (dev->out != dev->in)) {
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buf[n++] = dev->buf[dev->out++ % VTERM_BUFSIZE];
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/* PowerVM's vty implementation has a bug where it inserts a
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* \0 after every \r going to the guest. Existing guests have
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* a workaround for this which removes every \0 immediately
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* following a \r, so here we make ourselves bug-for-bug
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* compatible, so that the guest won't drop a real \0-after-\r
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* that happens to occur in a binary stream. */
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if (buf[n - 1] == '\r') {
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if (n < max) {
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buf[n++] = '\0';
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} else {
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/* No room for the extra \0, roll back and try again
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* next time */
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dev->out--;
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n--;
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break;
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}
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}
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}
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qemu_chr_fe_accept_input(&dev->chardev);
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return n;
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}
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void vty_putchars(SpaprVioDevice *sdev, uint8_t *buf, int len)
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{
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SpaprVioVty *dev = VIO_SPAPR_VTY_DEVICE(sdev);
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/* XXX this blocks entire thread. Rewrite to use
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* qemu_chr_fe_write and background I/O callbacks */
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qemu_chr_fe_write_all(&dev->chardev, buf, len);
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}
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static void spapr_vty_realize(SpaprVioDevice *sdev, Error **errp)
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{
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SpaprVioVty *dev = VIO_SPAPR_VTY_DEVICE(sdev);
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if (!qemu_chr_fe_backend_connected(&dev->chardev)) {
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error_setg(errp, "chardev property not set");
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return;
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}
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qemu_chr_fe_set_handlers(&dev->chardev, vty_can_receive,
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vty_receive, NULL, NULL, dev, NULL, true);
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}
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/* Forward declaration */
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static target_ulong h_put_term_char(PowerPCCPU *cpu, SpaprMachineState *spapr,
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target_ulong opcode, target_ulong *args)
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{
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target_ulong reg = args[0];
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target_ulong len = args[1];
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target_ulong char0_7 = args[2];
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target_ulong char8_15 = args[3];
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SpaprVioDevice *sdev;
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uint8_t buf[16];
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sdev = vty_lookup(spapr, reg);
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if (!sdev) {
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return H_PARAMETER;
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}
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if (len > 16) {
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return H_PARAMETER;
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}
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*((uint64_t *)buf) = cpu_to_be64(char0_7);
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*((uint64_t *)buf + 1) = cpu_to_be64(char8_15);
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vty_putchars(sdev, buf, len);
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return H_SUCCESS;
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}
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static target_ulong h_get_term_char(PowerPCCPU *cpu, SpaprMachineState *spapr,
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target_ulong opcode, target_ulong *args)
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{
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target_ulong reg = args[0];
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target_ulong *len = args + 0;
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target_ulong *char0_7 = args + 1;
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target_ulong *char8_15 = args + 2;
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SpaprVioDevice *sdev;
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uint8_t buf[16];
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sdev = vty_lookup(spapr, reg);
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if (!sdev) {
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return H_PARAMETER;
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}
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*len = vty_getchars(sdev, buf, sizeof(buf));
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if (*len < 16) {
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memset(buf + *len, 0, 16 - *len);
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}
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*char0_7 = be64_to_cpu(*((uint64_t *)buf));
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*char8_15 = be64_to_cpu(*((uint64_t *)buf + 1));
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return H_SUCCESS;
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}
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void spapr_vty_create(SpaprVioBus *bus, Chardev *chardev)
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{
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DeviceState *dev;
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dev = qdev_create(&bus->bus, "spapr-vty");
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qdev_prop_set_chr(dev, "chardev", chardev);
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qdev_init_nofail(dev);
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}
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static Property spapr_vty_properties[] = {
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DEFINE_SPAPR_PROPERTIES(SpaprVioVty, sdev),
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DEFINE_PROP_CHR("chardev", SpaprVioVty, chardev),
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DEFINE_PROP_END_OF_LIST(),
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};
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static const VMStateDescription vmstate_spapr_vty = {
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.name = "spapr_vty",
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.version_id = 1,
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.minimum_version_id = 1,
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.fields = (VMStateField[]) {
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VMSTATE_SPAPR_VIO(sdev, SpaprVioVty),
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VMSTATE_UINT32(in, SpaprVioVty),
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VMSTATE_UINT32(out, SpaprVioVty),
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VMSTATE_BUFFER(buf, SpaprVioVty),
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VMSTATE_END_OF_LIST()
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},
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};
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static void spapr_vty_class_init(ObjectClass *klass, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(klass);
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SpaprVioDeviceClass *k = VIO_SPAPR_DEVICE_CLASS(klass);
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k->realize = spapr_vty_realize;
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k->dt_name = "vty";
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k->dt_type = "serial";
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k->dt_compatible = "hvterm1";
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set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
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dc->props = spapr_vty_properties;
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dc->vmsd = &vmstate_spapr_vty;
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}
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static const TypeInfo spapr_vty_info = {
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.name = TYPE_VIO_SPAPR_VTY_DEVICE,
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.parent = TYPE_VIO_SPAPR_DEVICE,
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.instance_size = sizeof(SpaprVioVty),
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.class_init = spapr_vty_class_init,
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};
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SpaprVioDevice *spapr_vty_get_default(SpaprVioBus *bus)
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{
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SpaprVioDevice *sdev, *selected;
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BusChild *kid;
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/*
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* To avoid the console bouncing around we want one VTY to be
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* the "default". We haven't really got anything to go on, so
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* arbitrarily choose the one with the lowest reg value.
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*/
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selected = NULL;
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QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
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DeviceState *iter = kid->child;
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/* Only look at VTY devices */
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if (!object_dynamic_cast(OBJECT(iter), TYPE_VIO_SPAPR_VTY_DEVICE)) {
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continue;
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}
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sdev = VIO_SPAPR_DEVICE(iter);
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/* First VTY we've found, so it is selected for now */
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if (!selected) {
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selected = sdev;
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continue;
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}
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/* Choose VTY with lowest reg value */
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if (sdev->reg < selected->reg) {
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selected = sdev;
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}
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}
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return selected;
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}
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SpaprVioDevice *vty_lookup(SpaprMachineState *spapr, target_ulong reg)
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{
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SpaprVioDevice *sdev;
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sdev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
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if (!sdev && reg == 0) {
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/* Hack for kernel early debug, which always specifies reg==0.
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* We search all VIO devices, and grab the vty with the lowest
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* reg. This attempts to mimic existing PowerVM behaviour
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* (early debug does work there, despite having no vty with
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* reg==0. */
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return spapr_vty_get_default(spapr->vio_bus);
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}
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if (!object_dynamic_cast(OBJECT(sdev), TYPE_VIO_SPAPR_VTY_DEVICE)) {
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return NULL;
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}
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return sdev;
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}
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static void spapr_vty_register_types(void)
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{
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spapr_register_hypercall(H_PUT_TERM_CHAR, h_put_term_char);
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spapr_register_hypercall(H_GET_TERM_CHAR, h_get_term_char);
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type_register_static(&spapr_vty_info);
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}
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type_init(spapr_vty_register_types)
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