target/i386/cpu.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-)
If cpu->host_phys_bits_limit is set, QEMU will make
cpu->phys_bits be lower than host_phys_bits on some cases. This
triggers a warning that was supposed to be printed only if
phys-bits was explicitly set in the command-line.
Reorder the code so the value of cpu->phys_bits is validated
before the cpu->host_phys_bits handling. This will avoid
unexpected warnings when cpu->host_phys_bits_limit is set.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
---
target/i386/cpu.c | 18 +++++++++---------
1 file changed, 9 insertions(+), 9 deletions(-)
diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 7e5b545005..1327e4901a 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -5269,15 +5269,6 @@ static void x86_cpu_realizefn(DeviceState *dev, Error **errp)
uint32_t host_phys_bits = x86_host_phys_bits();
static bool warned;
- if (cpu->host_phys_bits) {
- /* The user asked for us to use the host physical bits */
- cpu->phys_bits = host_phys_bits;
- if (cpu->host_phys_bits_limit &&
- cpu->phys_bits > cpu->host_phys_bits_limit) {
- cpu->phys_bits = cpu->host_phys_bits_limit;
- }
- }
-
/* Print a warning if the user set it to a value that's not the
* host value.
*/
@@ -5289,6 +5280,15 @@ static void x86_cpu_realizefn(DeviceState *dev, Error **errp)
warned = true;
}
+ if (cpu->host_phys_bits) {
+ /* The user asked for us to use the host physical bits */
+ cpu->phys_bits = host_phys_bits;
+ if (cpu->host_phys_bits_limit &&
+ cpu->phys_bits > cpu->host_phys_bits_limit) {
+ cpu->phys_bits = cpu->host_phys_bits_limit;
+ }
+ }
+
if (cpu->phys_bits &&
(cpu->phys_bits > TARGET_PHYS_ADDR_SPACE_BITS ||
cpu->phys_bits < 32)) {
--
2.18.0.rc1.1.g3f1ff2140
* Eduardo Habkost (ehabkost@redhat.com) wrote: > If cpu->host_phys_bits_limit is set, QEMU will make > cpu->phys_bits be lower than host_phys_bits on some cases. This > triggers a warning that was supposed to be printed only if > phys-bits was explicitly set in the command-line. > > Reorder the code so the value of cpu->phys_bits is validated > before the cpu->host_phys_bits handling. This will avoid > unexpected warnings when cpu->host_phys_bits_limit is set. > > Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> I think that's OK; note I think that means you can trigger an erroneous warning in the case where the user does something odd like: phys_bits=50,host_phys_bits=true so you print the warning and *then* set phys_bits = host_phys_bits. Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com> > --- > target/i386/cpu.c | 18 +++++++++--------- > 1 file changed, 9 insertions(+), 9 deletions(-) > > diff --git a/target/i386/cpu.c b/target/i386/cpu.c > index 7e5b545005..1327e4901a 100644 > --- a/target/i386/cpu.c > +++ b/target/i386/cpu.c > @@ -5269,15 +5269,6 @@ static void x86_cpu_realizefn(DeviceState *dev, Error **errp) > uint32_t host_phys_bits = x86_host_phys_bits(); > static bool warned; > > - if (cpu->host_phys_bits) { > - /* The user asked for us to use the host physical bits */ > - cpu->phys_bits = host_phys_bits; > - if (cpu->host_phys_bits_limit && > - cpu->phys_bits > cpu->host_phys_bits_limit) { > - cpu->phys_bits = cpu->host_phys_bits_limit; > - } > - } > - > /* Print a warning if the user set it to a value that's not the > * host value. > */ > @@ -5289,6 +5280,15 @@ static void x86_cpu_realizefn(DeviceState *dev, Error **errp) > warned = true; > } > > + if (cpu->host_phys_bits) { > + /* The user asked for us to use the host physical bits */ > + cpu->phys_bits = host_phys_bits; > + if (cpu->host_phys_bits_limit && > + cpu->phys_bits > cpu->host_phys_bits_limit) { > + cpu->phys_bits = cpu->host_phys_bits_limit; > + } > + } > + > if (cpu->phys_bits && > (cpu->phys_bits > TARGET_PHYS_ADDR_SPACE_BITS || > cpu->phys_bits < 32)) { > -- > 2.18.0.rc1.1.g3f1ff2140 > -- Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK
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