| Message ID | 20161005130657.3399-2-rkrcmar@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Wed, Oct 05, 2016 at 03:06:50PM +0200, Radim Krčmář wrote: > Every configuration has only up to one APIC class and we'll be extending > the class with a function that can be called without an instanced > object, so a direct access to the class is convenient. > > This patch will break compilation if some code uses apic_get_class() > with CONFIG_USER_ONLY. > > Suggested-by: Eduardo Habkost <ehabkost@redhat.com> > Signed-off-by: Radim Krčmář <rkrcmar@redhat.com> Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
On Wed, Oct 05, 2016 at 03:06:50PM +0200, Radim Krčmář wrote: > Every configuration has only up to one APIC class and we'll be extending > the class with a function that can be called without an instanced > object, so a direct access to the class is convenient. > > This patch will break compilation if some code uses apic_get_class() > with CONFIG_USER_ONLY. > > Suggested-by: Eduardo Habkost <ehabkost@redhat.com> > Signed-off-by: Radim Krčmář <rkrcmar@redhat.com> Reviewed-by: Peter Xu <peterx@redhat.com>
diff --git a/hw/intc/apic_common.c b/hw/intc/apic_common.c index 14ac43c18666..8d01c9c8750e 100644 --- a/hw/intc/apic_common.c +++ b/hw/intc/apic_common.c @@ -18,6 +18,7 @@ * License along with this library; if not, see <http://www.gnu.org/licenses/> */ #include "qemu/osdep.h" +#include "qemu/error-report.h" #include "qapi/error.h" #include "qemu-common.h" #include "cpu.h" diff --git a/include/hw/i386/apic_internal.h b/include/hw/i386/apic_internal.h index 06c4e9f6f95b..286684857e9f 100644 --- a/include/hw/i386/apic_internal.h +++ b/include/hw/i386/apic_internal.h @@ -222,4 +222,6 @@ static inline int apic_get_bit(uint32_t *tab, int index) return !!(tab[i] & mask); } +APICCommonClass *apic_get_class(void); + #endif /* QEMU_APIC_INTERNAL_H */ diff --git a/target-i386/cpu.c b/target-i386/cpu.c index 1c57fce81bcd..13505ab156e0 100644 --- a/target-i386/cpu.c +++ b/target-i386/cpu.c @@ -2848,9 +2848,8 @@ static void mce_init(X86CPU *cpu) } #ifndef CONFIG_USER_ONLY -static void x86_cpu_apic_create(X86CPU *cpu, Error **errp) +APICCommonClass *apic_get_class(void) { - APICCommonState *apic; const char *apic_type = "apic"; if (kvm_apic_in_kernel()) { @@ -2859,7 +2858,15 @@ static void x86_cpu_apic_create(X86CPU *cpu, Error **errp) apic_type = "xen-apic"; } - cpu->apic_state = DEVICE(object_new(apic_type)); + return APIC_COMMON_CLASS(object_class_by_name(apic_type)); +} + +static void x86_cpu_apic_create(X86CPU *cpu, Error **errp) +{ + APICCommonState *apic; + ObjectClass *apic_class = OBJECT_CLASS(apic_get_class()); + + cpu->apic_state = DEVICE(object_new(object_class_get_name(apic_class))); object_property_add_child(OBJECT(cpu), "lapic", OBJECT(cpu->apic_state), &error_abort);
Every configuration has only up to one APIC class and we'll be extending the class with a function that can be called without an instanced object, so a direct access to the class is convenient. This patch will break compilation if some code uses apic_get_class() with CONFIG_USER_ONLY. Suggested-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com> --- v4: do not use private class attribute [Eduardo] v3: completely rewrite the mechanism [Eduardo] v2: assert() instead of error_report() and exit() [Peter] It still looks horrible, so I'll be glad for any advice. And what is CONFIG_USER_ONLY? --- hw/intc/apic_common.c | 1 + include/hw/i386/apic_internal.h | 2 ++ target-i386/cpu.c | 13 ++++++++++--- 3 files changed, 13 insertions(+), 3 deletions(-)