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arm64/kvm: Add generic v8 KVM target

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This patch adds a generic ARM v8 KVM target cpu type for use
by the new CPUs which eventualy ends up using the common sys_reg
table. For backward compatibility the existing targets have been
preserved. Any new target CPU that can be covered by generic v8
sys_reg tables should make use of the new generic target.

Signed-off-by: Suzuki K. Poulose <suzuki.poulose@arm.com>
Acked-by: Marc Zyngier <Marc.Zyngier@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Suzuki K. Poulose 2015-06-17 10:00:46 +01:00 committed by Marc Zyngier
parent eef8c85a3b
commit bca556ac46
3 changed files with 12 additions and 3 deletions
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10
arch/arm64/include/uapi/asm/kvm.h
View File

@ -53,14 +53,20 @@ struct kvm_regs {
struct user_fpsimd_state fp_regs; struct user_fpsimd_state fp_regs;
}; };
/* Supported Processor Types */ /*
* Supported CPU Targets - Adding a new target type is not recommended,
* unless there are some special registers not supported by the
* genericv8 syreg table.
*/
#define KVM_ARM_TARGET_AEM_V8 0 #define KVM_ARM_TARGET_AEM_V8 0
#define KVM_ARM_TARGET_FOUNDATION_V8 1 #define KVM_ARM_TARGET_FOUNDATION_V8 1
#define KVM_ARM_TARGET_CORTEX_A57 2 #define KVM_ARM_TARGET_CORTEX_A57 2
#define KVM_ARM_TARGET_XGENE_POTENZA 3 #define KVM_ARM_TARGET_XGENE_POTENZA 3
#define KVM_ARM_TARGET_CORTEX_A53 4 #define KVM_ARM_TARGET_CORTEX_A53 4
/* Generic ARM v8 target */
#define KVM_ARM_TARGET_GENERIC_V8 5
#define KVM_ARM_NUM_TARGETS 5 #define KVM_ARM_NUM_TARGETS 6
/* KVM_ARM_SET_DEVICE_ADDR ioctl id encoding */ /* KVM_ARM_SET_DEVICE_ADDR ioctl id encoding */
#define KVM_ARM_DEVICE_TYPE_SHIFT 0 #define KVM_ARM_DEVICE_TYPE_SHIFT 0

3
arch/arm64/kvm/guest.c
View File

@ -295,7 +295,8 @@ int __attribute_const__ kvm_target_cpu(void)
break; break;
}; };
return -EINVAL; /* Return a default generic target */
return KVM_ARM_TARGET_GENERIC_V8;
} }
int kvm_vcpu_preferred_target(struct kvm_vcpu_init *init) int kvm_vcpu_preferred_target(struct kvm_vcpu_init *init)

2
arch/arm64/kvm/sys_regs_generic_v8.c
View File

@ -94,6 +94,8 @@ static int __init sys_reg_genericv8_init(void)
&genericv8_target_table); &genericv8_target_table);
kvm_register_target_sys_reg_table(KVM_ARM_TARGET_XGENE_POTENZA, kvm_register_target_sys_reg_table(KVM_ARM_TARGET_XGENE_POTENZA,
&genericv8_target_table); &genericv8_target_table);
kvm_register_target_sys_reg_table(KVM_ARM_TARGET_GENERIC_V8,
&genericv8_target_table);
return 0; return 0;
} }