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hw/misc/sifive_u_otp: Use IF_PFLASH for the OTP device instead of IF_NONE

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Configuring a drive with "if=none" is meant for creation of a backend
only, it should not get automatically assigned to a device frontend.
Use "if=pflash" for the One-Time-Programmable device instead (like
it is e.g. also done for the efuse device in hw/arm/xlnx-zcu102.c).

Since the old way of configuring the device has already been published
with the previous QEMU versions, we cannot remove this immediately, but
have to deprecate it and support it for at least two more releases.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Acked-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20211119102549.217755-1-thuth@redhat.com
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
Thomas Huth 2021-11-19 11:25:49 +01:00 committed by Alistair Francis
parent c5fbdd60cf
commit 6b717a8d44
2 changed files with 14 additions and 1 deletions
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6
docs/about/deprecated.rst
View File

@ -192,6 +192,12 @@ as short-form boolean values, and passed to plugins as ``arg_name=on``.
However, short-form booleans are deprecated and full explicit ``arg_name=on``
form is preferred.
``-drive if=none`` for the sifive_u OTP device (since 6.2)
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
Using ``-drive if=none`` to configure the OTP device of the sifive_u
RISC-V machine is deprecated. Use ``-drive if=pflash`` instead.
QEMU Machine Protocol (QMP) commands
------------------------------------

9
hw/misc/sifive_u_otp.c
View File

@ -209,7 +209,14 @@ static void sifive_u_otp_realize(DeviceState *dev, Error **errp)
TYPE_SIFIVE_U_OTP, SIFIVE_U_OTP_REG_SIZE);
sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->mmio);
dinfo = drive_get_next(IF_NONE);
dinfo = drive_get_next(IF_PFLASH);
if (!dinfo) {
dinfo = drive_get_next(IF_NONE);
if (dinfo) {
warn_report("using \"-drive if=none\" for the OTP is deprecated, "
"use \"-drive if=pflash\" instead.");
}
}
if (dinfo) {
int ret;
uint64_t perm;