qemu-e2k/bootdevice.c

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/*
* QEMU Boot Device Implement
*
* Copyright (c) 2014 HUAWEI TECHNOLOGIES CO., LTD.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu/osdep.h"
2016-03-14 09:01:28 +01:00
#include "qapi/error.h"
#include "sysemu/sysemu.h"
#include "qapi/visitor.h"
#include "qemu/error-report.h"
#include "sysemu/reset.h"
#include "hw/qdev-core.h"
#include "hw/boards.h"
typedef struct FWBootEntry FWBootEntry;
struct FWBootEntry {
QTAILQ_ENTRY(FWBootEntry) link;
int32_t bootindex;
DeviceState *dev;
char *suffix;
};
static QTAILQ_HEAD(, FWBootEntry) fw_boot_order =
QTAILQ_HEAD_INITIALIZER(fw_boot_order);
static QEMUBootSetHandler *boot_set_handler;
static void *boot_set_opaque;
void qemu_register_boot_set(QEMUBootSetHandler *func, void *opaque)
{
boot_set_handler = func;
boot_set_opaque = opaque;
}
void qemu_boot_set(const char *boot_order, Error **errp)
{
Error *local_err = NULL;
if (!boot_set_handler) {
error_setg(errp, "no function defined to set boot device list for"
" this architecture");
return;
}
validate_bootdevices(boot_order, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
boot_set_handler(boot_set_opaque, boot_order, errp);
}
void validate_bootdevices(const char *devices, Error **errp)
{
/* We just do some generic consistency checks */
const char *p;
int bitmap = 0;
for (p = devices; *p != '\0'; p++) {
/* Allowed boot devices are:
* a-b: floppy disk drives
* c-f: IDE disk drives
* g-m: machine implementation dependent drives
* n-p: network devices
* It's up to each machine implementation to check if the given boot
* devices match the actual hardware implementation and firmware
* features.
*/
if (*p < 'a' || *p > 'p') {
error_setg(errp, "Invalid boot device '%c'", *p);
return;
}
if (bitmap & (1 << (*p - 'a'))) {
error_setg(errp, "Boot device '%c' was given twice", *p);
return;
}
bitmap |= 1 << (*p - 'a');
}
}
void restore_boot_order(void *opaque)
{
char *normal_boot_order = opaque;
static int first = 1;
/* Restore boot order and remove ourselves after the first boot */
if (first) {
first = 0;
return;
}
if (boot_set_handler) {
qemu_boot_set(normal_boot_order, &error_abort);
}
qemu_unregister_reset(restore_boot_order, normal_boot_order);
g_free(normal_boot_order);
}
void check_boot_index(int32_t bootindex, Error **errp)
{
FWBootEntry *i;
if (bootindex >= 0) {
QTAILQ_FOREACH(i, &fw_boot_order, link) {
if (i->bootindex == bootindex) {
error_setg(errp, "The bootindex %d has already been used",
bootindex);
return;
}
}
}
}
void del_boot_device_path(DeviceState *dev, const char *suffix)
{
FWBootEntry *i;
if (dev == NULL) {
return;
}
QTAILQ_FOREACH(i, &fw_boot_order, link) {
if ((!suffix || !g_strcmp0(i->suffix, suffix)) &&
i->dev == dev) {
QTAILQ_REMOVE(&fw_boot_order, i, link);
g_free(i->suffix);
g_free(i);
break;
}
}
}
void add_boot_device_path(int32_t bootindex, DeviceState *dev,
const char *suffix)
{
FWBootEntry *node, *i;
if (bootindex < 0) {
del_boot_device_path(dev, suffix);
return;
}
assert(dev != NULL || suffix != NULL);
del_boot_device_path(dev, suffix);
node = g_malloc0(sizeof(FWBootEntry));
node->bootindex = bootindex;
node->suffix = g_strdup(suffix);
node->dev = dev;
QTAILQ_FOREACH(i, &fw_boot_order, link) {
if (i->bootindex == bootindex) {
error_report("Two devices with same boot index %d", bootindex);
exit(1);
} else if (i->bootindex < bootindex) {
continue;
}
QTAILQ_INSERT_BEFORE(i, node, link);
return;
}
QTAILQ_INSERT_TAIL(&fw_boot_order, node, link);
}
DeviceState *get_boot_device(uint32_t position)
{
uint32_t counter = 0;
FWBootEntry *i = NULL;
DeviceState *res = NULL;
if (!QTAILQ_EMPTY(&fw_boot_order)) {
QTAILQ_FOREACH(i, &fw_boot_order, link) {
if (counter == position) {
res = i->dev;
break;
}
counter++;
}
}
return res;
}
static char *get_boot_device_path(DeviceState *dev, bool ignore_suffixes,
const char *suffix)
{
char *devpath = NULL, *s = NULL, *d, *bootpath;
if (dev) {
devpath = qdev_get_fw_dev_path(dev);
assert(devpath);
}
if (!ignore_suffixes) {
if (dev) {
d = qdev_get_own_fw_dev_path_from_handler(dev->parent_bus, dev);
if (d) {
assert(!suffix);
s = d;
} else {
s = g_strdup(suffix);
}
} else {
s = g_strdup(suffix);
}
}
bootpath = g_strdup_printf("%s%s",
devpath ? devpath : "",
s ? s : "");
g_free(devpath);
g_free(s);
return bootpath;
}
/*
* This function returns null terminated string that consist of new line
* separated device paths.
*
* memory pointed by "size" is assigned total length of the array in bytes
*
*/
char *get_boot_devices_list(size_t *size)
{
FWBootEntry *i;
size_t total = 0;
char *list = NULL;
MachineClass *mc = MACHINE_GET_CLASS(qdev_get_machine());
bool ignore_suffixes = mc->ignore_boot_device_suffixes;
QTAILQ_FOREACH(i, &fw_boot_order, link) {
char *bootpath;
size_t len;
bootpath = get_boot_device_path(i->dev, ignore_suffixes, i->suffix);
if (total) {
list[total-1] = '\n';
}
len = strlen(bootpath) + 1;
list = g_realloc(list, total + len);
memcpy(&list[total], bootpath, len);
total += len;
g_free(bootpath);
}
*size = total;
if (boot_strict && *size > 0) {
list[total-1] = '\n';
list = g_realloc(list, total + 5);
memcpy(&list[total], "HALT", 5);
*size = total + 5;
}
return list;
}
typedef struct {
int32_t *bootindex;
const char *suffix;
DeviceState *dev;
} BootIndexProperty;
static void device_get_bootindex(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
BootIndexProperty *prop = opaque;
qapi: Swap visit_* arguments for consistent 'name' placement JSON uses "name":value, but many of our visitor interfaces were called with visit_type_FOO(v, &value, name, errp). This can be a bit confusing to have to mentally swap the parameter order to match JSON order. It's particularly bad for visit_start_struct(), where the 'name' parameter is smack in the middle of the otherwise-related group of 'obj, kind, size' parameters! It's time to do a global swap of the parameter ordering, so that the 'name' parameter is always immediately after the Visitor argument. Additional reason in favor of the swap: the existing include/qjson.h prefers listing 'name' first in json_prop_*(), and I have plans to unify that file with the qapi visitors; listing 'name' first in qapi will minimize churn to the (admittedly few) qjson.h clients. Later patches will then fix docs, object.h, visitor-impl.h, and those clients to match. Done by first patching scripts/qapi*.py by hand to make generated files do what I want, then by running the following Coccinelle script to affect the rest of the code base: $ spatch --sp-file script `git grep -l '\bvisit_' -- '**/*.[ch]'` I then had to apply some touchups (Coccinelle insisted on TAB indentation in visitor.h, and botched the signature of visit_type_enum() by rewriting 'const char *const strings[]' to the syntactically invalid 'const char*const[] strings'). The movement of parameters is sufficient to provoke compiler errors if any callers were missed. // Part 1: Swap declaration order @@ type TV, TErr, TObj, T1, T2; identifier OBJ, ARG1, ARG2; @@ void visit_start_struct -(TV v, TObj OBJ, T1 ARG1, const char *name, T2 ARG2, TErr errp) +(TV v, const char *name, TObj OBJ, T1 ARG1, T2 ARG2, TErr errp) { ... } @@ type bool, TV, T1; identifier ARG1; @@ bool visit_optional -(TV v, T1 ARG1, const char *name) +(TV v, const char *name, T1 ARG1) { ... } @@ type TV, TErr, TObj, T1; identifier OBJ, ARG1; @@ void visit_get_next_type -(TV v, TObj OBJ, T1 ARG1, const char *name, TErr errp) +(TV v, const char *name, TObj OBJ, T1 ARG1, TErr errp) { ... } @@ type TV, TErr, TObj, T1, T2; identifier OBJ, ARG1, ARG2; @@ void visit_type_enum -(TV v, TObj OBJ, T1 ARG1, T2 ARG2, const char *name, TErr errp) +(TV v, const char *name, TObj OBJ, T1 ARG1, T2 ARG2, TErr errp) { ... } @@ type TV, TErr, TObj; identifier OBJ; identifier VISIT_TYPE =~ "^visit_type_"; @@ void VISIT_TYPE -(TV v, TObj OBJ, const char *name, TErr errp) +(TV v, const char *name, TObj OBJ, TErr errp) { ... } // Part 2: swap caller order @@ expression V, NAME, OBJ, ARG1, ARG2, ERR; identifier VISIT_TYPE =~ "^visit_type_"; @@ ( -visit_start_struct(V, OBJ, ARG1, NAME, ARG2, ERR) +visit_start_struct(V, NAME, OBJ, ARG1, ARG2, ERR) | -visit_optional(V, ARG1, NAME) +visit_optional(V, NAME, ARG1) | -visit_get_next_type(V, OBJ, ARG1, NAME, ERR) +visit_get_next_type(V, NAME, OBJ, ARG1, ERR) | -visit_type_enum(V, OBJ, ARG1, ARG2, NAME, ERR) +visit_type_enum(V, NAME, OBJ, ARG1, ARG2, ERR) | -VISIT_TYPE(V, OBJ, NAME, ERR) +VISIT_TYPE(V, NAME, OBJ, ERR) ) Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <1454075341-13658-19-git-send-email-eblake@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2016-01-29 14:48:54 +01:00
visit_type_int32(v, name, prop->bootindex, errp);
}
static void device_set_bootindex(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
BootIndexProperty *prop = opaque;
int32_t boot_index;
Error *local_err = NULL;
if (!visit_type_int32(v, name, &boot_index, errp)) {
return;
}
/* check whether bootindex is present in fw_boot_order list */
check_boot_index(boot_index, &local_err);
if (local_err) {
goto out;
}
/* change bootindex to a new one */
*prop->bootindex = boot_index;
add_boot_device_path(*prop->bootindex, prop->dev, prop->suffix);
out:
error_propagate(errp, local_err);
}
static void property_release_bootindex(Object *obj, const char *name,
void *opaque)
{
BootIndexProperty *prop = opaque;
del_boot_device_path(prop->dev, prop->suffix);
g_free(prop);
}
void device_add_bootindex_property(Object *obj, int32_t *bootindex,
const char *name, const char *suffix,
DeviceState *dev)
{
BootIndexProperty *prop = g_malloc0(sizeof(*prop));
prop->bootindex = bootindex;
prop->suffix = suffix;
prop->dev = dev;
object_property_add(obj, name, "int32",
device_get_bootindex,
device_set_bootindex,
property_release_bootindex,
qom: Drop parameter @errp of object_property_add() & friends The only way object_property_add() can fail is when a property with the same name already exists. Since our property names are all hardcoded, failure is a programming error, and the appropriate way to handle it is passing &error_abort. Same for its variants, except for object_property_add_child(), which additionally fails when the child already has a parent. Parentage is also under program control, so this is a programming error, too. We have a bit over 500 callers. Almost half of them pass &error_abort, slightly fewer ignore errors, one test case handles errors, and the remaining few callers pass them to their own callers. The previous few commits demonstrated once again that ignoring programming errors is a bad idea. Of the few ones that pass on errors, several violate the Error API. The Error ** argument must be NULL, &error_abort, &error_fatal, or a pointer to a variable containing NULL. Passing an argument of the latter kind twice without clearing it in between is wrong: if the first call sets an error, it no longer points to NULL for the second call. ich9_pm_add_properties(), sparc32_ledma_realize(), sparc32_dma_realize(), xilinx_axidma_realize(), xilinx_enet_realize() are wrong that way. When the one appropriate choice of argument is &error_abort, letting users pick the argument is a bad idea. Drop parameter @errp and assert the preconditions instead. There's one exception to "duplicate property name is a programming error": the way object_property_add() implements the magic (and undocumented) "automatic arrayification". Don't drop @errp there. Instead, rename object_property_add() to object_property_try_add(), and add the obvious wrapper object_property_add(). Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <20200505152926.18877-15-armbru@redhat.com> [Two semantic rebase conflicts resolved]
2020-05-05 17:29:22 +02:00
prop);
/* initialize devices' bootindex property to -1 */
object_property_set_int(obj, -1, name, NULL);
}
typedef struct FWLCHSEntry FWLCHSEntry;
struct FWLCHSEntry {
QTAILQ_ENTRY(FWLCHSEntry) link;
DeviceState *dev;
char *suffix;
uint32_t lcyls;
uint32_t lheads;
uint32_t lsecs;
};
static QTAILQ_HEAD(, FWLCHSEntry) fw_lchs =
QTAILQ_HEAD_INITIALIZER(fw_lchs);
void add_boot_device_lchs(DeviceState *dev, const char *suffix,
uint32_t lcyls, uint32_t lheads, uint32_t lsecs)
{
FWLCHSEntry *node;
if (!lcyls && !lheads && !lsecs) {
return;
}
assert(dev != NULL || suffix != NULL);
node = g_malloc0(sizeof(FWLCHSEntry));
node->suffix = g_strdup(suffix);
node->dev = dev;
node->lcyls = lcyls;
node->lheads = lheads;
node->lsecs = lsecs;
QTAILQ_INSERT_TAIL(&fw_lchs, node, link);
}
void del_boot_device_lchs(DeviceState *dev, const char *suffix)
{
FWLCHSEntry *i;
if (dev == NULL) {
return;
}
QTAILQ_FOREACH(i, &fw_lchs, link) {
if ((!suffix || !g_strcmp0(i->suffix, suffix)) &&
i->dev == dev) {
QTAILQ_REMOVE(&fw_lchs, i, link);
g_free(i->suffix);
g_free(i);
break;
}
}
}
char *get_boot_devices_lchs_list(size_t *size)
{
FWLCHSEntry *i;
size_t total = 0;
char *list = NULL;
QTAILQ_FOREACH(i, &fw_lchs, link) {
char *bootpath;
char *chs_string;
size_t len;
bootpath = get_boot_device_path(i->dev, false, i->suffix);
chs_string = g_strdup_printf("%s %" PRIu32 " %" PRIu32 " %" PRIu32,
bootpath, i->lcyls, i->lheads, i->lsecs);
if (total) {
list[total - 1] = '\n';
}
len = strlen(chs_string) + 1;
list = g_realloc(list, total + len);
memcpy(&list[total], chs_string, len);
total += len;
g_free(chs_string);
g_free(bootpath);
}
*size = total;
return list;
}