diff options
author | Christoffer Dall <c.dall@virtualopensystems.com> | 2013-01-20 18:28:10 -0500 |
---|---|---|
committer | Christoffer Dall <c.dall@virtualopensystems.com> | 2013-01-23 13:29:14 -0500 |
commit | 1138245ccf9652429630c09fb068e9b12c56c3d3 (patch) | |
tree | f4ef6b0be9f30ee57e7044a5311bf6487bb8bfa1 /arch/arm/include/asm/kvm_host.h | |
parent | 5b3e5e5bf230f56309706dfc05fc0cb173cc83aa (diff) |
KVM: ARM: User space API for getting/setting co-proc registers
The following three ioctls are implemented:
- KVM_GET_REG_LIST
- KVM_GET_ONE_REG
- KVM_SET_ONE_REG
Now we have a table for all the cp15 registers, we can drive a generic
API.
The register IDs carry the following encoding:
ARM registers are mapped using the lower 32 bits. The upper 16 of that
is the register group type, or coprocessor number:
ARM 32-bit CP15 registers have the following id bit patterns:
0x4002 0000 000F <zero:1> <crn:4> <crm:4> <opc1:4> <opc2:3>
ARM 64-bit CP15 registers have the following id bit patterns:
0x4003 0000 000F <zero:1> <zero:4> <crm:4> <opc1:4> <zero:3>
For futureproofing, we need to tell QEMU about the CP15 registers the
host lets the guest access.
It will need this information to restore a current guest on a future
CPU or perhaps a future KVM which allow some of these to be changed.
We use a separate table for these, as they're only for the userspace API.
Reviewed-by: Will Deacon <will.deacon@arm.com>
Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Christoffer Dall <c.dall@virtualopensystems.com>
Diffstat (limited to 'arch/arm/include/asm/kvm_host.h')
-rw-r--r-- | arch/arm/include/asm/kvm_host.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm/include/asm/kvm_host.h b/arch/arm/include/asm/kvm_host.h index e1d4168d4f1..ed79043d792 100644 --- a/arch/arm/include/asm/kvm_host.h +++ b/arch/arm/include/asm/kvm_host.h @@ -27,6 +27,7 @@ #define KVM_MEMORY_SLOTS 32 #define KVM_PRIVATE_MEM_SLOTS 4 #define KVM_COALESCED_MMIO_PAGE_OFFSET 1 +#define KVM_HAVE_ONE_REG #define KVM_VCPU_MAX_FEATURES 0 @@ -137,6 +138,9 @@ int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end); void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte); +unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu); +int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices); + /* We do not have shadow page tables, hence the empty hooks */ static inline int kvm_age_hva(struct kvm *kvm, unsigned long hva) { |