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pseries: Move CPU compatibility property to machine

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Server class POWER CPUs have a "compat" property, which is used to set the
backwards compatibility mode for the processor.  However, this only makes
sense for machine types which don't give the guest access to hypervisor
privilege - otherwise the compatibility level is under the guest's control.

To reflect this, this removes the CPU 'compat' property and instead
creates a 'max-cpu-compat' property on the pseries machine.  Strictly
speaking this breaks compatibility, but AFAIK the 'compat' option was
never (directly) used with -device or device_add.

The option was used with -cpu.  So, to maintain compatibility, this
patch adds a hack to the cpu option parsing to strip out any compat
options supplied with -cpu and set them on the machine property
instead of the now deprecated cpu property.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Tested-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Reviewed-by: Greg Kurz <groug@kaod.org>
Tested-by: Greg Kurz <groug@kaod.org>
Tested-by: Andrea Bolognani <abologna@redhat.com>
This commit is contained in:
David Gibson 2017-06-11 20:33:59 +08:00
parent a733371214
commit 7843c0d60d
7 changed files with 201 additions and 73 deletions
Download patch file Download diff file Expand all files Collapse all files

5
target/ppc/cpu.h
View file

@ -1189,7 +1189,6 @@ typedef struct PPCVirtualHypervisorClass PPCVirtualHypervisorClass;
* PowerPCCPU:
* @env: #CPUPPCState
* @cpu_dt_id: CPU index used in the device tree. KVM uses this index too
* @max_compat: Maximal supported logical PVR from the command line
* @compat_pvr: Current logical PVR, zero if in "raw" mode
*
* A PowerPC CPU.
@ -1201,7 +1200,6 @@ struct PowerPCCPU {
CPUPPCState env;
int cpu_dt_id;
uint32_t max_compat;
uint32_t compat_pvr;
PPCVirtualHypervisor *vhyp;
Object *intc;
@ -1375,6 +1373,9 @@ void ppc_set_compat(PowerPCCPU *cpu, uint32_t compat_pvr, Error **errp);
void ppc_set_compat_all(uint32_t compat_pvr, Error **errp);
#endif
int ppc_compat_max_threads(PowerPCCPU *cpu);
void ppc_compat_add_property(Object *obj, const char *name,
uint32_t *compat_pvr, const char *basedesc,
Error **errp);
#endif /* defined(TARGET_PPC64) */
#include "exec/cpu-all.h"