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* block: Separate blk_is_writable() and blk_supports_write_perm()Kevin Wolf2021-01-271-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, blk_is_read_only() tells whether a given BlockBackend can only be used in read-only mode because its root node is read-only. Some callers actually try to answer a slightly different question: Is the BlockBackend configured to be writable, by taking write permissions on the root node? This can differ, for example, for CD-ROM devices which don't take write permissions, but may be backed by a writable image file. scsi-cd allows write requests to the drive if blk_is_read_only() returns false. However, the write request will immediately run into an assertion failure because the write permission is missing. This patch introduces separate functions for both questions. blk_supports_write_perm() answers the question whether the block node/image file can support writable devices, whereas blk_is_writable() tells whether the BlockBackend is currently configured to be writable. All calls of blk_is_read_only() are converted to one of the two new functions. Fixes: https://bugs.launchpad.net/bugs/1906693 Cc: qemu-stable@nongnu.org Signed-off-by: Kevin Wolf <kwolf@redhat.com> Message-Id: <20210118123448.307825-2-kwolf@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
* qdev: Move softmmu properties to qdev-properties-system.hEduardo Habkost2020-12-181-0/+1
| | | | | | | | | | | Move the property types and property macros implemented in qdev-properties-system.c to a new qdev-properties-system.h header. Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Reviewed-by: Igor Mammedov <imammedo@redhat.com> Message-Id: <20201211220529.2290218-16-ehabkost@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
* parallel nor flash: Fix Lesser GPL version numberChetan Pant2020-11-151-1/+1
| | | | | | | | | | | | | There is no "version 2" of the "Lesser" General Public License. It is either "GPL version 2.0" or "Lesser GPL version 2.1". This patch replaces all occurrences of "Lesser GPL version 2" with "Lesser GPL version 2.1" in comment section. Signed-off-by: Chetan Pant <chetan4windows@gmail.com> Message-Id: <20201023123034.19609-1-chetan4windows@gmail.com> Reviewed-by: Thomas Huth <thuth@redhat.com> [thuth: Fixed subject] Signed-off-by: Thomas Huth <thuth@redhat.com>
* pflash: Use ERRP_GUARD()Vladimir Sementsov-Ogievskiy2020-07-101-4/+3Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If we want to check error after errp-function call, we need to introduce local_err and then propagate it to errp. Instead, use the ERRP_GUARD() macro, benefits are: 1. No need of explicit error_propagate call 2. No need of explicit local_err variable: use errp directly 3. ERRP_GUARD() leaves errp as is if it's not NULL or &error_fatal, this means that we don't break error_abort (we'll abort on error_set, not on error_propagate) If we want to add some info to errp (by error_prepend() or error_append_hint()), we must use the ERRP_GUARD() macro. Otherwise, this info will not be added when errp == &error_fatal (the program will exit prior to the error_append_hint() or error_prepend() call). No such cases are being fixed here. This commit is generated by command sed -n '/^Parallel NOR Flash devices$/,/^$/{s/^F: //p}' \ MAINTAINERS | \ xargs git ls-files | grep '\.[hc]$' | \ xargs spatch \ --sp-file scripts/coccinelle/errp-guard.cocci \ --macro-file scripts/cocci-macro-file.h \ --in-place --no-show-diff --max-width 80 Reported-by: Kevin Wolf <kwolf@redhat.com> Reported-by: Greg Kurz <groug@kaod.org> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> [Commit message tweaked] Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20200707165037.1026246-5-armbru@redhat.com> [ERRP_AUTO_PROPAGATE() renamed to ERRP_GUARD(), and auto-propagated-errp.cocci to errp-guard.cocci. Commit message tweaked again.]
* qdev: Make qdev_prop_set_drive() match the other helpersMarkus Armbruster2020-06-231-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | qdev_prop_set_drive() can fail. None of the other qdev_prop_set_FOO() can; they abort on error. To clean up this inconsistency, rename qdev_prop_set_drive() to qdev_prop_set_drive_err(), and create a qdev_prop_set_drive() that aborts on error. Coccinelle script to update callers: @ depends on !(file in "hw/core/qdev-properties-system.c")@ expression dev, name, value; symbol error_abort; @@ - qdev_prop_set_drive(dev, name, value, &error_abort); + qdev_prop_set_drive(dev, name, value); @@ expression dev, name, value, errp; @@ - qdev_prop_set_drive(dev, name, value, errp); + qdev_prop_set_drive_err(dev, name, value, errp); Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20200622094227.1271650-14-armbru@redhat.com>
* sysbus: Convert to sysbus_realize() etc. with CoccinelleMarkus Armbruster2020-06-151-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Convert from qdev_realize(), qdev_realize_and_unref() with null @bus argument to sysbus_realize(), sysbus_realize_and_unref(). Coccinelle script: @@ expression dev, errp; @@ - qdev_realize(DEVICE(dev), NULL, errp); + sysbus_realize(SYS_BUS_DEVICE(dev), errp); @@ expression sysbus_dev, dev, errp; @@ + sysbus_dev = SYS_BUS_DEVICE(dev); - qdev_realize_and_unref(dev, NULL, errp); + sysbus_realize_and_unref(sysbus_dev, errp); - sysbus_dev = SYS_BUS_DEVICE(dev); @@ expression sysbus_dev, dev, errp; expression expr; @@ sysbus_dev = SYS_BUS_DEVICE(dev); ... when != dev = expr; - qdev_realize_and_unref(dev, NULL, errp); + sysbus_realize_and_unref(sysbus_dev, errp); @@ expression dev, errp; @@ - qdev_realize_and_unref(DEVICE(dev), NULL, errp); + sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), errp); @@ expression dev, errp; @@ - qdev_realize_and_unref(dev, NULL, errp); + sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), errp); Whitespace changes minimized manually. Signed-off-by: Markus Armbruster <armbru@redhat.com> Acked-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <20200610053247.1583243-46-armbru@redhat.com> [Conflicts in hw/misc/empty_slot.c and hw/sparc/leon3.c resolved]
* qdev: Convert uses of qdev_create() with CoccinelleMarkus Armbruster2020-06-151-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is the transformation explained in the commit before previous. Takes care of just one pattern that needs conversion. More to come in this series. Coccinelle script: @ depends on !(file in "hw/arm/highbank.c")@ expression bus, type_name, dev, expr; @@ - dev = qdev_create(bus, type_name); + dev = qdev_new(type_name); ... when != dev = expr - qdev_init_nofail(dev); + qdev_realize_and_unref(dev, bus, &error_fatal); @@ expression bus, type_name, dev, expr; identifier DOWN; @@ - dev = DOWN(qdev_create(bus, type_name)); + dev = DOWN(qdev_new(type_name)); ... when != dev = expr - qdev_init_nofail(DEVICE(dev)); + qdev_realize_and_unref(DEVICE(dev), bus, &error_fatal); @@ expression bus, type_name, expr; identifier dev; @@ - DeviceState *dev = qdev_create(bus, type_name); + DeviceState *dev = qdev_new(type_name); ... when != dev = expr - qdev_init_nofail(dev); + qdev_realize_and_unref(dev, bus, &error_fatal); @@ expression bus, type_name, dev, expr, errp; symbol true; @@ - dev = qdev_create(bus, type_name); + dev = qdev_new(type_name); ... when != dev = expr - object_property_set_bool(OBJECT(dev), true, "realized", errp); + qdev_realize_and_unref(dev, bus, errp); @@ expression bus, type_name, expr, errp; identifier dev; symbol true; @@ - DeviceState *dev = qdev_create(bus, type_name); + DeviceState *dev = qdev_new(type_name); ... when != dev = expr - object_property_set_bool(OBJECT(dev), true, "realized", errp); + qdev_realize_and_unref(dev, bus, errp); The first rule exempts hw/arm/highbank.c, because it matches along two control flow paths there, with different @type_name. Covered by the next commit's manual conversions. Missing #include "qapi/error.h" added manually. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <20200610053247.1583243-10-armbru@redhat.com> [Conflicts in hw/misc/empty_slot.c and hw/sparc/leon3.c resolved]
* hw/block/pflash: Check return value of blk_pwrite()Mansour Ahmadi2020-05-221-1/+7
| | | | | | | | | | | When updating the PFLASH file contents, we should check for a possible failure of blk_pwrite(). Similar to commit 3a688294e. Reported-by: Coverity (CID 1357678 CHECKED_RETURN) Signed-off-by: Mansour Ahmadi <mansourweb@gmail.com> Message-Id: <20200408003552.58095-1-mansourweb@gmail.com> [PMD: Add missing "qemu/error-report.h" include and TODO comment] Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
* hw: Use QEMU_IS_ALIGNED() on parallel flash block sizePhilippe Mathieu-Daudé2020-05-181-1/+1
| | | | | | | | | | | | Use the QEMU_IS_ALIGNED() macro to verify the flash block size is properly aligned. It is quicker to process when reviewing. Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20200511205246.24621-1-philmd@redhat.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Acked-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
* qdev: Unrealize must not failMarkus Armbruster2020-05-151-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Devices may have component devices and buses. Device realization may fail. Realization is recursive: a device's realize() method realizes its components, and device_set_realized() realizes its buses (which should in turn realize the devices on that bus, except bus_set_realized() doesn't implement that, yet). When realization of a component or bus fails, we need to roll back: unrealize everything we realized so far. If any of these unrealizes failed, the device would be left in an inconsistent state. Must not happen. device_set_realized() lets it happen: it ignores errors in the roll back code starting at label child_realize_fail. Since realization is recursive, unrealization must be recursive, too. But how could a partly failed unrealize be rolled back? We'd have to re-realize, which can fail. This design is fundamentally broken. device_set_realized() does not roll back at all. Instead, it keeps unrealizing, ignoring further errors. It can screw up even for a device with no buses: if the lone dc->unrealize() fails, it still unregisters vmstate, and calls listeners' unrealize() callback. bus_set_realized() does not roll back either. Instead, it stops unrealizing. Fortunately, no unrealize method can fail, as we'll see below. To fix the design error, drop parameter @errp from all the unrealize methods. Any unrealize method that uses @errp now needs an update. This leads us to unrealize() methods that can fail. Merely passing it to another unrealize method cannot cause failure, though. Here are the ones that do other things with @errp: * virtio_serial_device_unrealize() Fails when qbus_set_hotplug_handler() fails, but still does all the other work. On failure, the device would stay realized with its resources completely gone. Oops. Can't happen, because qbus_set_hotplug_handler() can't actually fail here. Pass &error_abort to qbus_set_hotplug_handler() instead. * hw/ppc/spapr_drc.c's unrealize() Fails when object_property_del() fails, but all the other work is already done. On failure, the device would stay realized with its vmstate registration gone. Oops. Can't happen, because object_property_del() can't actually fail here. Pass &error_abort to object_property_del() instead. * spapr_phb_unrealize() Fails and bails out when remove_drcs() fails, but other work is already done. On failure, the device would stay realized with some of its resources gone. Oops. remove_drcs() fails only when chassis_from_bus()'s object_property_get_uint() fails, and it can't here. Pass &error_abort to remove_drcs() instead. Therefore, no unrealize method can fail before this patch. device_set_realized()'s recursive unrealization via bus uses object_property_set_bool(). Can't drop @errp there, so pass &error_abort. We similarly unrealize with object_property_set_bool() elsewhere, always ignoring errors. Pass &error_abort instead. Several unrealize methods no longer handle errors from other unrealize methods: virtio_9p_device_unrealize(), virtio_input_device_unrealize(), scsi_qdev_unrealize(), ... Much of the deleted error handling looks wrong anyway. One unrealize methods no longer ignore such errors: usb_ehci_pci_exit(). Several realize methods no longer ignore errors when rolling back: v9fs_device_realize_common(), pci_qdev_unrealize(), spapr_phb_realize(), usb_qdev_realize(), vfio_ccw_realize(), virtio_device_realize(). Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <20200505152926.18877-17-armbru@redhat.com>
* hw/block/pflash_cfi02: Remove unneeded variable assignmentPhilippe Mathieu-Daudé2020-02-181-1/+0Star
| | | | | | | | | | | | | | | Fix warning reported by Clang static code analyzer: CC hw/block/pflash_cfi02.o hw/block/pflash_cfi02.c:311:5: warning: Value stored to 'ret' is never read ret = -1; ^ ~~ Reported-by: Clang Static Analyzer Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20200215161557.4077-4-philmd@redhat.com> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
* qdev: set properties with device_class_set_props()Marc-André Lureau2020-01-241-1/+1
| | | | | | | | | | | | | | | | | | | | | The following patch will need to handle properties registration during class_init time. Let's use a device_class_set_props() setter. spatch --macro-file scripts/cocci-macro-file.h --sp-file ./scripts/coccinelle/qdev-set-props.cocci --keep-comments --in-place --dir . @@ typedef DeviceClass; DeviceClass *d; expression val; @@ - d->props = val + device_class_set_props(d, val) Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <20200110153039.1379601-20-marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* hw/block/pflash: Remove dynamic field width from trace eventsPhilippe Mathieu-Daudé2019-11-191-4/+4
| | | | | | | | | | | | | | | | | | Since not all trace backends support dynamic field width in format (dtrace via stap does not), replace by a static field width instead. We previously passed to the trace API 'width << 1' as the number of hex characters to display (the dynamic field width). We don't need this anymore. Instead, display the size of bytes accessed. Fixes: e8aa2d95ea ("pflash: Simplify trace_pflash_io_read/write") Fixes: c1474acd5d ("pflash: Simplify trace_pflash_data_read/write") Reported-by: Eric Blake <eblake@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Buglink: https://bugs.launchpad.net/qemu/+bug/1844817 Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
* Include hw/qdev-properties.h lessMarkus Armbruster2019-08-161-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | In my "build everything" tree, changing hw/qdev-properties.h triggers a recompile of some 2700 out of 6600 objects (not counting tests and objects that don't depend on qemu/osdep.h). Many places including hw/qdev-properties.h (directly or via hw/qdev.h) actually need only hw/qdev-core.h. Include hw/qdev-core.h there instead. hw/qdev.h is actually pointless: all it does is include hw/qdev-core.h and hw/qdev-properties.h, which in turn includes hw/qdev-core.h. Replace the remaining uses of hw/qdev.h by hw/qdev-properties.h. While there, delete a few superfluous inclusions of hw/qdev-core.h. Touching hw/qdev-properties.h now recompiles some 1200 objects. Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: "Daniel P. Berrangé" <berrange@redhat.com> Cc: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eduardo Habkost <ehabkost@redhat.com> Message-Id: <20190812052359.30071-22-armbru@redhat.com>
* Include hw/hw.h exactly where neededMarkus Armbruster2019-08-161-1/+0Star
| | | | | | | | | | | | | | | | In my "build everything" tree, changing hw/hw.h triggers a recompile of some 2600 out of 6600 objects (not counting tests and objects that don't depend on qemu/osdep.h). The previous commits have left only the declaration of hw_error() in hw/hw.h. This permits dropping most of its inclusions. Touching it now recompiles less than 200 objects. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Message-Id: <20190812052359.30071-19-armbru@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
* Include migration/vmstate.h lessMarkus Armbruster2019-08-161-0/+1
| | | | | | | | | | | | | | | | | | In my "build everything" tree, changing migration/vmstate.h triggers a recompile of some 2700 out of 6600 objects (not counting tests and objects that don't depend on qemu/osdep.h). hw/hw.h supposedly includes it for convenience. Several other headers include it just to get VMStateDescription. The previous commit made that unnecessary. Include migration/vmstate.h only where it's still needed. Touching it now recompiles only some 1600 objects. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Message-Id: <20190812052359.30071-16-armbru@redhat.com> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
* hw/block/pflash_cfi02: Rewrite a fall through commentPhilippe Mathieu-Daudé2019-07-231-1/+1
| | | | | | | | | | | | | | | | | | | | | | GCC9 is confused by this comment when building with CFLAG -Wimplicit-fallthrough=2: hw/block/pflash_cfi02.c: In function ‘pflash_write’: hw/block/pflash_cfi02.c:574:16: error: this statement may fall through [-Werror=implicit-fallthrough=] 574 | if (boff == 0x55 && cmd == 0x98) { | ^ hw/block/pflash_cfi02.c:581:9: note: here 581 | default: | ^~~~~~~ cc1: all warnings being treated as errors Rewrite the comment using 'fall through' which is recognized by GCC and static analyzers. Reported-by: Stefan Weil <sw@weilnetz.de> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Message-Id: <20190719131425.10835-4-philmd@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
* hw/block/pflash_cfi02: Explicit switch fallthrough for ERASE commandsPhilippe Mathieu-Daudé2019-07-161-0/+1
| | | | | | | | | | | | | | | Previous to commit ddb6f2254, the DQ2 bit was incorrectly set during PROGRAM command (0xA0). The commit reordered the switch cases to only set the DQ2 bit for the ERASE commands using a fallthrough, but did not explicit the fallthrough is intentional. Mark the switch fallthrough with a comment interpretable by C preprocessors and static analysis tools. Reported-by: Coverity (CID 1403012) Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Message-Id: <20190711130759.27720-1-philmd@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
* Revert "hw/block/pflash_cfi02: Reduce I/O accesses to 16-bit"Philippe Mathieu-Daudé2019-07-091-1/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This reverts commit 3ae0343db69c379beb5750b4ed70794bbed51b85. Stephen Checkoway noticed commit 3ae0343db69 is incorrect. This commit state all parallel flashes are limited to 16-bit accesses, however the x32 configuration exists in some models, such the Cypress S29CL032J, which CFI Device Geometry Definition announces: CFI ADDR DATA 0x28,0x29 = 0x0003 (x32-only asynchronous interface) Guests should not be affected by the previous change, because QEMU does not announce itself as x32 capable: /* Flash device interface (8 & 16 bits) */ pfl->cfi_table[0x28] = 0x02; pfl->cfi_table[0x29] = 0x00; Commit 3ae0343db69 does not restrict the bus to 16-bit accesses, but restrict the implementation as 16-bit access max, so a guest 32-bit access will result in 2x 16-bit calls. Now, we have 2 boards that register the flash device in 32-bit access: - PPC: taihu_405ep The CFI id matches the S29AL008J that is a 1MB in x16, while the code QEMU forces it to be 2MB, and checking Linux it expects a 4MB flash. - ARM: Digic4 While the comment says "Samsung K8P3215UQB 64M Bit (4Mx16)", this flash is 32Mb (2MB). Also note the CFI id does not match the comment. To avoid unexpected side effect, we revert commit 3ae0343db69, and will clean the board code later. Reported-by: Stephen Checkoway <stephen.checkoway@oberlin.edu> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
* hw/block/pflash_cfi02: Reduce I/O accesses to 16-bitPhilippe Mathieu-Daudé2019-07-021-4/+1Star
| | | | | | | | | Parallel NOR flashes are limited to 16-bit bus accesses. Remove the 32-bit dead code. Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Message-Id: <20190627202719.17739-29-philmd@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
* hw/block/pflash_cfi02: Document commandsPhilippe Mathieu-Daudé2019-07-021-21/+19Star
| | | | | | Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Message-Id: <20190627202719.17739-28-philmd@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
* hw/block/pflash_cfi02: Use chip erase time specified in the CFI tableStephen Checkoway2019-07-021-2/+2
| | | | | | | | | | | | | | | When erasing the chip, use the typical time specified in the CFI table rather than arbitrarily selecting 5 seconds. Since the currently unconfigurable value set in the table is 12, this means a chip erase takes 4096 ms so this isn't a big change in behavior. Signed-off-by: Stephen Checkoway <stephen.checkoway@oberlin.edu> Message-Id: <20190426162624.55977-11-stephen.checkoway@oberlin.edu> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
* hw/block/pflash_cfi02: Implement erase suspend/resumeStephen Checkoway2019-07-021-14/+140
| | | | | | | | | | | | | | | | | | | | During a sector erase (but not a chip erase), the embeded erase program can be suspended. Once suspended, the sectors not selected for erasure may be read and programmed. Autoselect mode is allowed during erase suspend mode. Presumably, CFI queries are similarly allowed so this commit allows them as well. Since guest firmware can use status bits DQ7, DQ6, DQ3, and DQ2 to determine the current state of sector erasure, these bits are properly implemented. Signed-off-by: Stephen Checkoway <stephen.checkoway@oberlin.edu> Message-Id: <20190426162624.55977-10-stephen.checkoway@oberlin.edu> Acked-by: Thomas Huth <thuth@redhat.com> Acked-by: Philippe Mathieu-Daudé <philmd@redhat.com> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com> [PMD: Rebased] Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
* hw/block/pflash_cfi02: Implement multi-sector eraseStephen Checkoway2019-07-021-18/+76
| | | | | | | | | | | | | | | After two unlock cycles and a sector erase command, the AMD flash chips start a 50 us erase time out. Any additional sector erase commands add a sector to be erased and restart the 50 us timeout. During the timeout, status bit DQ3 is cleared. After the time out, DQ3 is asserted during erasure. Signed-off-by: Stephen Checkoway <stephen.checkoway@oberlin.edu> Message-Id: <20190426162624.55977-9-stephen.checkoway@oberlin.edu> Acked-by: Thomas Huth <thuth@redhat.com> Acked-by: Philippe Mathieu-Daudé <philmd@redhat.com> [PMD: Rebased] Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
* hw/block/pflash_cfi02: Fix reset command not ignored during eraseStephen Checkoway2019-07-021-1/+2
| | | | | | | | | | | | | | | | When the flash device is performing a chip erase, all commands are ignored. When it is performing a sector erase, only the erase suspend command is valid, which is currently not supported. In particular, the reset command should not cause the device to reset to read array mode while programming is on going. Signed-off-by: Stephen Checkoway <stephen.checkoway@oberlin.edu> Message-Id: <20190426162624.55977-8-stephen.checkoway@oberlin.edu> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
* hw/block/pflash_cfi02: Fix CFI in autoselect modeStephen Checkoway2019-07-021-4/+18
| | | | | | | | | | | | | | After a flash device enters CFI mode from autoselect mode, the reset command returns the device to autoselect mode. An additional reset command is necessary to return to read array mode. Signed-off-by: Stephen Checkoway <stephen.checkoway@oberlin.edu> Message-Id: <20190426162624.55977-7-stephen.checkoway@oberlin.edu> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com> Acked-by: Thomas Huth <thuth@redhat.com> Acked-by: Alistair Francis <alistair.francis@wdc.com> Acked-by: Philippe Mathieu-Daudé <philmd@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
* hw/block/pflash_cfi02: Split if() conditionPhilippe Mathieu-Daudé2019-07-021-2/+4
| | | | | | | | | Split the if() condition check and arrange the indentation to ease the review of the next patches. No logical change. Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Message-Id: <20190627202719.17739-21-philmd@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
* hw/block/pflash_cfi02: Extract pflash_regions_count()Philippe Mathieu-Daudé2019-07-021-2/+6
| | | | | | | | | Extract the pflash_regions_count() function, the code will be easier to review. Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Message-Id: <20190627202719.17739-20-philmd@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
* hw/block/pflash_cfi02: Implement nonuniform sector sizesStephen Checkoway2019-07-021-27/+114
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some flash chips support sectors of different sizes. For example, the AMD AM29LV160DT has 31 64 kB sectors, one 32 kB sector, two 8 kB sectors, and a 16 kB sector, in that order. The AM29LV160DB has those in the reverse order. The `num-blocks` and `sector-length` properties work exactly as they did before: a flash device with uniform sector lengths. To get non-uniform sector lengths for up to four regions, the following properties may be set - region 0. `num-blocks0` and `sector-length0`; - region 1. `num-blocks1` and `sector-length1`; - region 2. `num-blocks2` and `sector-length2`; and - region 3. `num-blocks3` and `sector-length3`. If the uniform and nonuniform properties are set, then both must specify a flash device with the same total size. It would be better to disallow both being set, or make `num-blocks0` and `sector-length0` alias `num-blocks` and `sector-length`, but that would make testing currently impossible. Signed-off-by: Stephen Checkoway <stephen.checkoway@oberlin.edu> Message-Id: <20190426162624.55977-6-stephen.checkoway@oberlin.edu> Acked-by: Thomas Huth <thuth@redhat.com> Acked-by: Philippe Mathieu-Daudé <philmd@redhat.com> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com> [PMD: Rebased, add assert() on pri_offset] Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
* hw/block/pflash_cfi02: Document 'Page Mode' operations are not supportedPhilippe Mathieu-Daudé2019-07-021-1/+3
| | | | | | | | | | | | | | The 'page mode' feature entry was implicitly set as zero (not supported). Document it exists, so we won't discard it if we squeeze the CFI table. Signed-off-by: Stephen Checkoway <stephen.checkoway@oberlin.edu> Message-Id: <20190426162624.55977-6-stephen.checkoway@oberlin.edu> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com> [PMD: Extracted from bigger patch] Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
* hw/block/pflash_cfi02: Hold the PRI table offset in a variablePhilippe Mathieu-Daudé2019-07-021-14/+17
| | | | | | | | | | | Manufacturers are allowed to move the PRI table, this is why the offset is queryable via fixed offsets 0x15/0x16. Add a variable to hold the offset, so it will be easier to later move the PRI table. Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Message-Id: <20190627202719.17739-17-philmd@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
* hw/block/pflash_cfi02: Document the current CFI valuesPhilippe Mathieu-Daudé2019-07-021-1/+10
| | | | | | | | | Signed-off-by: Stephen Checkoway <stephen.checkoway@oberlin.edu> Message-Id: <20190426162624.55977-6-stephen.checkoway@oberlin.edu> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> [PMD: Extracted from bigger patch] Acked-by: Alistair Francis <alistair.francis@wdc.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
* hw/block/pflash_cfi02: Remove pointless local variablePhilippe Mathieu-Daudé2019-07-021-8/+6Star
| | | | | | | | | | | | | We can directly use pfl->total_len, remove the local 'chip_len' variable. Signed-off-by: Stephen Checkoway <stephen.checkoway@oberlin.edu> Message-Id: <20190426162624.55977-6-stephen.checkoway@oberlin.edu> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com> [PMD: Extracted from bigger patch] Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
* hw/block/pflash_cfi02: Fix command address comparisonStephen Checkoway2019-07-021-1/+7
| | | | | | | | | | | | | | Most AMD commands only examine 11 bits of the address. This masks the addresses used in the comparison to 11 bits. The exceptions are word or sector addresses which use offset directly rather than the shifted offset, boff. Signed-off-by: Stephen Checkoway <stephen.checkoway@oberlin.edu> Message-Id: <20190426162624.55977-4-stephen.checkoway@oberlin.edu> Acked-by: Thomas Huth <thuth@redhat.com> Acked-by: Alistair Francis <alistair.francis@wdc.com> Acked-by: Philippe Mathieu-Daudé <philmd@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
* hw/block/pflash_cfi02: Unify the MemoryRegionOpsPhilippe Mathieu-Daudé2019-07-021-45/+15Star
| | | | | | | | | | | | | | | | The pflash_read()/pflash_write() can check the device endianess via the pfl->be variable, so remove the 'int be' argument. Since the big/little MemoryRegionOps are now identical, it is pointless to declare them both. Unify them. Signed-off-by: Stephen Checkoway <stephen.checkoway@oberlin.edu> Message-Id: <20190426162624.55977-3-stephen.checkoway@oberlin.edu> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com> [PMD: Extracted from bigger patch to ease review] Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
* hw/block/pflash_cfi02: Extract the pflash_data_read() functionPhilippe Mathieu-Daudé2019-07-021-10/+14
| | | | | | | | | | | | Extract the code block in a new function, remove a goto statement. Signed-off-by: Stephen Checkoway <stephen.checkoway@oberlin.edu> Message-Id: <20190426162624.55977-3-stephen.checkoway@oberlin.edu> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com> [PMD: Extracted from bigger patch, remove the XXX tracing comment] Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
* hw/block/pflash_cfi02: Use the ldst API in pflash_read()Philippe Mathieu-Daudé2019-07-021-27/+5Star
| | | | | | | | | | | | The load/store API eases code review. Signed-off-by: Stephen Checkoway <stephen.checkoway@oberlin.edu> Message-Id: <20190426162624.55977-3-stephen.checkoway@oberlin.edu> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com> [PMD: Extracted from bigger patch, simplified tracing] Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
* hw/block/pflash_cfi02: Use the ldst API in pflash_write()Philippe Mathieu-Daudé2019-07-021-30/+8Star
| | | | | | | | | | | | The load/store API eases code review. Signed-off-by: Stephen Checkoway <stephen.checkoway@oberlin.edu> Message-Id: <20190426162624.55977-3-stephen.checkoway@oberlin.edu> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com> [PMD: Extracted from bigger patch] Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
* hw/block/pflash_cfi02: Simplify a statement using fall throughPhilippe Mathieu-Daudé2019-07-021-3/+3
| | | | | | | | | | Signed-off-by: Stephen Checkoway <stephen.checkoway@oberlin.edu> Message-Id: <20190426162624.55977-3-stephen.checkoway@oberlin.edu> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com> [PMD: Extracted from bigger patch] Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
* hw/block/pflash_cfi02: Add helpers to manipulate the status bitsPhilippe Mathieu-Daudé2019-07-021-6/+34
| | | | | | | | | | | | | | | | Pull out all of the code to modify the status into simple helper functions. Status handling becomes more complex once multiple chips are interleaved to produce a single device. No change in functionality is intended with this commit. Signed-off-by: Stephen Checkoway <stephen.checkoway@oberlin.edu> Message-Id: <20190426162624.55977-3-stephen.checkoway@oberlin.edu> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com> [PMD: Extracted from bigger patch] Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
* hw/block/pflash_cfi02: Add an enum to define the write cyclesPhilippe Mathieu-Daudé2019-07-021-2/+8
| | | | | | | | | | | | No change in functionality is intended with this commit. Signed-off-by: Stephen Checkoway <stephen.checkoway@oberlin.edu> Message-Id: <20190426162624.55977-3-stephen.checkoway@oberlin.edu> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com> [PMD: Extracted from bigger patch] Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
* hw/block/pflash_cfi02: Fix debug format stringPhilippe Mathieu-Daudé2019-07-021-12/+6Star
| | | | | | | | | | | | | Always compile the debug code to prevent format string to bitrot. Delete dead code. Signed-off-by: Stephen Checkoway <stephen.checkoway@oberlin.edu> Message-Id: <20190426162624.55977-3-stephen.checkoway@oberlin.edu> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com> [PMD: Extracted from bigger patch, use PRIx32] Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
* hw/block/pflash: Simplify trace_pflash_data_read/write()Philippe Mathieu-Daudé2019-07-021-4/+2Star
| | | | | | | | | Use a field width format to have a single function to log the different width accesses. Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Message-Id: <20190627202719.17739-4-philmd@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
* hw/block/pflash: Simplify trace_pflash_io_read/write()Philippe Mathieu-Daudé2019-07-021-4/+2Star
| | | | | | | | | | | Call the read() trace function after the value is set, so we can log the returned value. Rename the I/O trace functions with '_io_' in their name. Reviewed-by: Stephen Checkoway <stephen.checkoway@oberlin.edu> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Message-Id: <20190627202719.17739-3-philmd@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
* Include qemu/module.h where needed, drop it from qemu-common.hMarkus Armbruster2019-06-121-0/+1
| | | | | | | | | Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20190523143508.25387-4-armbru@redhat.com> [Rebased with conflicts resolved automatically, except for hw/usb/dev-hub.c hw/misc/exynos4210_rng.c hw/misc/bcm2835_rng.c hw/misc/aspeed_scu.c hw/display/virtio-vga.c hw/arm/stm32f205_soc.c; ui/cocoa.m fixed up]
* pflash: Bury disabled code to limit device sizesAlex Bennée2019-03-261-6/+0Star
| | | | | | | | | | | We disabled code to limit device sizes to 8, 16, 32 or 64MiB more than a decade ago in commit 95d1f3edd5e and c8b153d7949, v0.9.1. Bury. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Laszlo Ersek <lersek@redhat.com> [Extracted from a larger patch, extended to pflash_cfi02.c] Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20190319163551.32499-3-armbru@redhat.com>
* pflash: Require backend size to match device, improve errorsMarkus Armbruster2019-03-261-4/+3Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We reject undersized backends with a rather enigmatic "failed to read the initial flash content" error. For instance: $ qemu-system-ppc64 -S -display none -M sam460ex -drive if=pflash,format=raw,file=eins.img qemu-system-ppc64: Initialization of device cfi.pflash02 failed: failed to read the initial flash content We happily accept oversized images, ignoring their tail. Throwing away parts of firmware that way is pretty much certain to end in an even more enigmatic failure to boot. Require the backend's size to match the device's size exactly. Report mismatch like this: qemu-system-ppc64: Initialization of device cfi.pflash01 failed: device requires 1048576 bytes, block backend provides 512 bytes Improve the error for actual read failures to "can't read block backend". To avoid duplicating even more code between the two pflash device models, do all that in new helper blk_check_size_and_read_all(). The error reporting can still be confusing. For instance: qemu-system-ppc64 -S -display none -M taihu -drive if=pflash,format=raw,file=eins.img -drive if=pflash,unit=1,format=raw,file=zwei.img qemu-system-ppc64: Initialization of device cfi.pflash02 failed: device requires 2097152 bytes, block backend provides 512 bytes Leaves the user guessing which of the two -drive is wrong. Mention the issue in a TODO comment. Suggested-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20190319163551.32499-2-armbru@redhat.com> Reviewed-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
* pflash: Clean up after commit 368a354f02b, part 2Markus Armbruster2019-03-111-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | | Our pflash devices are simplistically modelled has having "num-blocks" sectors of equal size "sector-length". Real hardware commonly has sectors of different sizes. How our "sector-length" property is related to the physical device's multiple sector sizes is unclear. Helper functions pflash_cfi01_register() and pflash_cfi02_register() create a pflash device, set properties including "sector-length" and "num-blocks", and realize. They take parameters @size, @sector_len and @nb_blocs. QOMification left parameter @size unused. Obviously, @size should match @sector_len and @nb_blocs, i.e. size == sector_len * nb_blocs. All callers satisfy this. Remove @nb_blocs and compute it from @size and @sector_len. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20190308094610.21210-16-armbru@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
* pflash: Clean up after commit 368a354f02b, part 1Markus Armbruster2019-03-111-1/+1
| | | | | | | | | | | | QOMification left parameter @qdev unused in pflash_cfi01_register() and pflash_cfi02_register(). All callers pass NULL. Remove. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20190308094610.21210-15-armbru@redhat.com>
* hw: Use PFLASH_CFI0{1,2} and TYPE_PFLASH_CFI0{1,2}Markus Armbruster2019-03-111-3/+0Star
| | | | | | | | | | | | | | | | We have two open-coded copies of macro PFLASH_CFI01(). Move the macro to the header, so we can ditch the copies. Move PFLASH_CFI02() to the header for symmetry. We define macros TYPE_PFLASH_CFI01 and TYPE_PFLASH_CFI02 for type name strings, then mostly use the strings. If the macros are worth defining, they are worth using. Replace the strings by the macros. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20190308094610.21210-6-armbru@redhat.com>
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