[5/7] target/i386/cpu: Improve errors for out of bounds property values

Commit Message

Markus Armbruster Oct. 10, 2024, 2:56 p.m. UTC

The error message for a "stepping" value that is out of bounds is a
bit odd:

    $ qemu-system-x86_64 -cpu qemu64,stepping=16
    qemu-system-x86_64: can't apply global qemu64-x86_64-cpu.stepping=16: Property .stepping doesn't take value 16 (minimum: 0, maximum: 15)

The "can't apply global" part is an unfortunate artifact of -cpu's
implementation.  Left for another day.

The remainder feels overly verbose.  Change it to

    qemu64-x86_64-cpu: can't apply global qemu64-x86_64-cpu.stepping=16: parameter 'stepping' can be at most 15

Likewise for "family", "model", and "tsc-frequency".

Signed-off-by: Markus Armbruster <[e-mail]>
---
 target/i386/cpu.c | 20 +++++++++-----------
 1 file changed, 9 insertions(+), 11 deletions(-)

Comments

Daniel P. Berrangé Oct. 10, 2024, 3:56 p.m. UTC | #1

On Thu, Oct 10, 2024 at 04:56:28PM +0200, Markus Armbruster wrote:
> The error message for a "stepping" value that is out of bounds is a
> bit odd:
> 
>     $ qemu-system-x86_64 -cpu qemu64,stepping=16
>     qemu-system-x86_64: can't apply global qemu64-x86_64-cpu.stepping=16: Property .stepping doesn't take value 16 (minimum: 0, maximum: 15)
> 
> The "can't apply global" part is an unfortunate artifact of -cpu's
> implementation.  Left for another day.
> 
> The remainder feels overly verbose.  Change it to
> 
>     qemu64-x86_64-cpu: can't apply global qemu64-x86_64-cpu.stepping=16: parameter 'stepping' can be at most 15
> 
> Likewise for "family", "model", and "tsc-frequency".
> 
> Signed-off-by: Markus Armbruster <[e-mail]>
> ---
>  target/i386/cpu.c | 20 +++++++++-----------
>  1 file changed, 9 insertions(+), 11 deletions(-)

Reviewed-by: Daniel P. Berrangé <[e-mail]>


With regards,
Daniel

Patch

diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 4f8fa60432..de2c7041c5 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -31,7 +31,6 @@ 
 #include "qapi/error.h"
 #include "qemu/error-report.h"
 #include "qapi/qapi-visit-machine.h"
-#include "qapi/qmp/qerror.h"
 #include "standard-headers/asm-x86/kvm_para.h"
 #include "hw/qdev-properties.h"
 #include "hw/i386/topology.h"
@@ -5455,8 +5454,8 @@  static void x86_cpuid_version_set_family(Object *obj, Visitor *v,
         return;
     }
     if (value > max) {
-        error_setg(errp, QERR_PROPERTY_VALUE_OUT_OF_RANGE, "",
-                   name ? name : "null", value, (int64_t)0, (int64_t)max);
+        error_setg(errp, "parameter '%s' can be at most %" PRIu64,
+                   name ? name : "null", max);
         return;
     }
 
@@ -5494,8 +5493,8 @@  static void x86_cpuid_version_set_model(Object *obj, Visitor *v,
         return;
     }
     if (value > max) {
-        error_setg(errp, QERR_PROPERTY_VALUE_OUT_OF_RANGE, "",
-                   name ? name : "null", value, (int64_t)0, (int64_t)max);
+        error_setg(errp, "parameter '%s' can be at most %" PRIu64,
+                   name ? name : "null", max);
         return;
     }
 
@@ -5528,8 +5527,8 @@  static void x86_cpuid_version_set_stepping(Object *obj, Visitor *v,
         return;
     }
     if (value > max) {
-        error_setg(errp, QERR_PROPERTY_VALUE_OUT_OF_RANGE, "",
-                   name ? name : "null", value, (int64_t)0, (int64_t)max);
+        error_setg(errp, "parameter '%s' can be at most %" PRIu64,
+                   name ? name : "null", max);
         return;
     }
 
@@ -5623,16 +5622,15 @@  static void x86_cpuid_set_tsc_freq(Object *obj, Visitor *v, const char *name,
                                    void *opaque, Error **errp)
 {
     X86CPU *cpu = X86_CPU(obj);
-    const int64_t min = 0;
     const int64_t max = INT64_MAX;
     int64_t value;
 
     if (!visit_type_int(v, name, &value, errp)) {
         return;
     }
-    if (value < min || value > max) {
-        error_setg(errp, QERR_PROPERTY_VALUE_OUT_OF_RANGE, "",
-                   name ? name : "null", value, min, max);
+    if (value < 0 || value > max) {
+        error_setg(errp, "parameter '%s' can be at most %" PRId64,
+                   name ? name : "null", max);
         return;
     }