| Message ID | 20231114235628.534334-2-gshan@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Unified CPU type check | expand |
On 11/14/23 15:55, Gavin Shan wrote: > 'ev67' CPU class will be returned to match everything, which makes > no sense as mentioned in the comments. Remove the logic to fall > back to 'ev67' CPU class to match everything. > > Signed-off-by: Gavin Shan <gshan@redhat.com> > --- > target/alpha/cpu.c | 7 ++----- > 1 file changed, 2 insertions(+), 5 deletions(-) The subject is wrong -- ev67 cpu class is still present. Better as target/alpha: Remove fallback to ev67 cpu class with that, Reviewed-by: Richard Henderson <richard.henderson@linaro.org> r~ > > diff --git a/target/alpha/cpu.c b/target/alpha/cpu.c > index 39cf841b3e..91fe8ae095 100644 > --- a/target/alpha/cpu.c > +++ b/target/alpha/cpu.c > @@ -141,11 +141,8 @@ static ObjectClass *alpha_cpu_class_by_name(const char *cpu_model) > typename = g_strdup_printf(ALPHA_CPU_TYPE_NAME("%s"), cpu_model); > oc = object_class_by_name(typename); > g_free(typename); > - > - /* TODO: remove match everything nonsense */ > - if (!oc || object_class_is_abstract(oc)) { > - /* Default to ev67; no reason not to emulate insns by default. */ > - oc = object_class_by_name(ALPHA_CPU_TYPE_NAME("ev67")); > + if (!oc || !object_class_dynamic_cast(oc, TYPE_ALPHA_CPU)) { > + return NULL; > } > > return oc;
On 15/11/23 01:22, Richard Henderson wrote: > On 11/14/23 15:55, Gavin Shan wrote: >> 'ev67' CPU class will be returned to match everything, which makes >> no sense as mentioned in the comments. Remove the logic to fall >> back to 'ev67' CPU class to match everything. >> >> Signed-off-by: Gavin Shan <gshan@redhat.com> >> --- >> target/alpha/cpu.c | 7 ++----- >> 1 file changed, 2 insertions(+), 5 deletions(-) > > The subject is wrong -- ev67 cpu class is still present. > Better as > > target/alpha: Remove fallback to ev67 cpu class > > with that, > Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Also: Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
On 15/11/23 00:55, Gavin Shan wrote: > 'ev67' CPU class will be returned to match everything, which makes > no sense as mentioned in the comments. Remove the logic to fall > back to 'ev67' CPU class to match everything. > > Signed-off-by: Gavin Shan <gshan@redhat.com> > --- > target/alpha/cpu.c | 7 ++----- > 1 file changed, 2 insertions(+), 5 deletions(-) > > diff --git a/target/alpha/cpu.c b/target/alpha/cpu.c > index 39cf841b3e..91fe8ae095 100644 > --- a/target/alpha/cpu.c > +++ b/target/alpha/cpu.c > @@ -141,11 +141,8 @@ static ObjectClass *alpha_cpu_class_by_name(const char *cpu_model) > typename = g_strdup_printf(ALPHA_CPU_TYPE_NAME("%s"), cpu_model); > oc = object_class_by_name(typename); > g_free(typename); > - > - /* TODO: remove match everything nonsense */ > - if (!oc || object_class_is_abstract(oc)) { > - /* Default to ev67; no reason not to emulate insns by default. */ > - oc = object_class_by_name(ALPHA_CPU_TYPE_NAME("ev67")); > + if (!oc || !object_class_dynamic_cast(oc, TYPE_ALPHA_CPU)) { > + return NULL; > } This breaks linux-user: qemu-alpha: unable to find CPU model 'any'
On 4/1/24 18:58, Philippe Mathieu-Daudé wrote: > On 15/11/23 00:55, Gavin Shan wrote: >> 'ev67' CPU class will be returned to match everything, which makes >> no sense as mentioned in the comments. Remove the logic to fall >> back to 'ev67' CPU class to match everything. >> >> Signed-off-by: Gavin Shan <gshan@redhat.com> >> --- >> target/alpha/cpu.c | 7 ++----- >> 1 file changed, 2 insertions(+), 5 deletions(-) >> >> diff --git a/target/alpha/cpu.c b/target/alpha/cpu.c >> index 39cf841b3e..91fe8ae095 100644 >> --- a/target/alpha/cpu.c >> +++ b/target/alpha/cpu.c >> @@ -141,11 +141,8 @@ static ObjectClass *alpha_cpu_class_by_name(const >> char *cpu_model) >> typename = g_strdup_printf(ALPHA_CPU_TYPE_NAME("%s"), cpu_model); >> oc = object_class_by_name(typename); >> g_free(typename); >> - >> - /* TODO: remove match everything nonsense */ >> - if (!oc || object_class_is_abstract(oc)) { >> - /* Default to ev67; no reason not to emulate insns by >> default. */ >> - oc = object_class_by_name(ALPHA_CPU_TYPE_NAME("ev67")); >> + if (!oc || !object_class_dynamic_cast(oc, TYPE_ALPHA_CPU)) { >> + return NULL; >> } > > This breaks linux-user: > > qemu-alpha: unable to find CPU model 'any' Thread 1 "qemu-alpha" hit Breakpoint 1, alpha_cpu_class_by_name (cpu_model=0x5555557202a0 "any") at target/alpha/cpu.c:123 123 { (gdb) bt #0 alpha_cpu_class_by_name (cpu_model=0x5555557202a0 "any") at target/alpha/cpu.c:123 #1 0x0000555555583956 in cpu_class_by_name (typename=typename@entry=0x555555674af8 "alpha-cpu", cpu_model=0x5555557202a0 "any") at hw/core/cpu-common.c:156 #2 0x00005555555904a1 in parse_cpu_option (cpu_option=<optimized out>) at cpu-target.c:257 #3 0x00005555555822e9 in main (argc=2, argv=0x7fffffffe318, envp=<optimized out>) at linux-user/main.c:784 in main(): 781 if (cpu_model == NULL) { 782 cpu_model = cpu_get_model(get_elf_eflags(execfd)); 783 } 784 cpu_type = parse_cpu_option(cpu_model); Having: $ cat linux-user/alpha/target_elf.h ... #ifndef ALPHA_TARGET_ELF_H #define ALPHA_TARGET_ELF_H static inline const char *cpu_get_model(uint32_t eflags) { return "any"; } #endif
On 4/1/24 19:03, Philippe Mathieu-Daudé wrote: > On 4/1/24 18:58, Philippe Mathieu-Daudé wrote: >> On 15/11/23 00:55, Gavin Shan wrote: >>> 'ev67' CPU class will be returned to match everything, which makes >>> no sense as mentioned in the comments. Remove the logic to fall >>> back to 'ev67' CPU class to match everything. >>> >>> Signed-off-by: Gavin Shan <gshan@redhat.com> >>> --- >>> target/alpha/cpu.c | 7 ++----- >>> 1 file changed, 2 insertions(+), 5 deletions(-) >>> >>> diff --git a/target/alpha/cpu.c b/target/alpha/cpu.c >>> index 39cf841b3e..91fe8ae095 100644 >>> --- a/target/alpha/cpu.c >>> +++ b/target/alpha/cpu.c >>> @@ -141,11 +141,8 @@ static ObjectClass >>> *alpha_cpu_class_by_name(const char *cpu_model) >>> typename = g_strdup_printf(ALPHA_CPU_TYPE_NAME("%s"), cpu_model); >>> oc = object_class_by_name(typename); >>> g_free(typename); >>> - >>> - /* TODO: remove match everything nonsense */ >>> - if (!oc || object_class_is_abstract(oc)) { >>> - /* Default to ev67; no reason not to emulate insns by >>> default. */ >>> - oc = object_class_by_name(ALPHA_CPU_TYPE_NAME("ev67")); >>> + if (!oc || !object_class_dynamic_cast(oc, TYPE_ALPHA_CPU)) { >>> + return NULL; >>> } >> >> This breaks linux-user: >> >> qemu-alpha: unable to find CPU model 'any' > > Thread 1 "qemu-alpha" hit Breakpoint 1, alpha_cpu_class_by_name > (cpu_model=0x5555557202a0 "any") at target/alpha/cpu.c:123 > 123 { > (gdb) bt > #0 alpha_cpu_class_by_name (cpu_model=0x5555557202a0 "any") at > target/alpha/cpu.c:123 > #1 0x0000555555583956 in cpu_class_by_name > (typename=typename@entry=0x555555674af8 "alpha-cpu", > cpu_model=0x5555557202a0 "any") > at hw/core/cpu-common.c:156 > #2 0x00005555555904a1 in parse_cpu_option (cpu_option=<optimized out>) > at cpu-target.c:257 > #3 0x00005555555822e9 in main (argc=2, argv=0x7fffffffe318, > envp=<optimized out>) at linux-user/main.c:784 > > in main(): > > 781 if (cpu_model == NULL) { > 782 cpu_model = cpu_get_model(get_elf_eflags(execfd)); > 783 } > 784 cpu_type = parse_cpu_option(cpu_model); > > Having: > > $ cat linux-user/alpha/target_elf.h > ... > #ifndef ALPHA_TARGET_ELF_H > #define ALPHA_TARGET_ELF_H > static inline const char *cpu_get_model(uint32_t eflags) > { > return "any"; > } > #endif Laurent, Richard, are you OK with this fix? -- >8 -- diff --git a/linux-user/alpha/target_elf.h b/linux-user/alpha/target_elf.h index 344e9f4d39..b77d638f6d 100644 --- a/linux-user/alpha/target_elf.h +++ b/linux-user/alpha/target_elf.h @@ -9,6 +9,6 @@ #define ALPHA_TARGET_ELF_H static inline const char *cpu_get_model(uint32_t eflags) { - return "any"; + return "ev67"; } #endif ---
diff --git a/target/alpha/cpu.c b/target/alpha/cpu.c index 39cf841b3e..91fe8ae095 100644 --- a/target/alpha/cpu.c +++ b/target/alpha/cpu.c @@ -141,11 +141,8 @@ static ObjectClass *alpha_cpu_class_by_name(const char *cpu_model) typename = g_strdup_printf(ALPHA_CPU_TYPE_NAME("%s"), cpu_model); oc = object_class_by_name(typename); g_free(typename); - - /* TODO: remove match everything nonsense */ - if (!oc || object_class_is_abstract(oc)) { - /* Default to ev67; no reason not to emulate insns by default. */ - oc = object_class_by_name(ALPHA_CPU_TYPE_NAME("ev67")); + if (!oc || !object_class_dynamic_cast(oc, TYPE_ALPHA_CPU)) { + return NULL; } return oc;
'ev67' CPU class will be returned to match everything, which makes no sense as mentioned in the comments. Remove the logic to fall back to 'ev67' CPU class to match everything. Signed-off-by: Gavin Shan <gshan@redhat.com> --- target/alpha/cpu.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-)