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| author | Eric Blake | 2021-02-11 21:44:37 +0100 |
|---|---|---|
| committer | Eric Blake | 2021-03-08 20:36:37 +0100 |
| commit | f174cd3350c5e97db000e7383be974c66046b8f5 (patch) | |
| tree | 01833a8fd59c747e40595918a2b82252b76ef734 /docs/system | |
| parent | utils: Improve qemu_strtosz() to have 64 bits of precision (diff) | |
| download | qemu-f174cd3350c5e97db000e7383be974c66046b8f5.tar.gz qemu-f174cd3350c5e97db000e7383be974c66046b8f5.tar.xz qemu-f174cd3350c5e97db000e7383be974c66046b8f5.zip | |
utils: Deprecate hex-with-suffix sizes
Supporting '0x20M' looks odd, particularly since we have a 'B' suffix
that is ambiguous for bytes, as well as a less-frequently-used 'E'
suffix for extremely large exibytes. In practice, people using hex
inputs are specifying values in bytes (and would have written
0x2000000, or possibly relied on default_suffix in the case of
qemu_strtosz_MiB), and the use of scaling suffixes makes the most
sense for inputs in decimal (where the user would write 32M). But
rather than outright dropping support for hex-with-suffix, let's
follow our deprecation policy. Sadly, since qemu_strtosz() does not
have an Err** parameter, and plumbing that in would be a much larger
task, we instead go with just directly emitting the deprecation
warning to stderr.
Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <20210211204438.1184395-4-eblake@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Diffstat (limited to 'docs/system')
| -rw-r--r-- | docs/system/deprecated.rst | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/docs/system/deprecated.rst b/docs/system/deprecated.rst index cfabe69846..ecff6bf8c6 100644 --- a/docs/system/deprecated.rst +++ b/docs/system/deprecated.rst @@ -166,6 +166,14 @@ Using ``-M kernel-irqchip=off`` with x86 machine types that include a local APIC is deprecated. The ``split`` setting is supported, as is using ``-M kernel-irqchip=off`` with the ISA PC machine type. +hexadecimal sizes with scaling multipliers (since 6.0) +'''''''''''''''''''''''''''''''''''''''''''''''''''''' + +Input parameters that take a size value should only use a size suffix +(such as 'k' or 'M') when the base is written in decimal, and not when +the value is hexadecimal. That is, '0x20M' is deprecated, and should +be written either as '32M' or as '0x2000000'. + QEMU Machine Protocol (QMP) commands ------------------------------------ |