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| 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/kvm/guest.c | |
| 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/kvm/guest.c')
| -rw-r--r-- | arch/arm/kvm/guest.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/arch/arm/kvm/guest.c b/arch/arm/kvm/guest.c index a12eb229021d..2339d9609d36 100644 --- a/arch/arm/kvm/guest.c +++ b/arch/arm/kvm/guest.c @@ -26,6 +26,7 @@ #include <asm/kvm.h> #include <asm/kvm_asm.h> #include <asm/kvm_emulate.h> +#include <asm/kvm_coproc.h> #define VM_STAT(x) { #x, offsetof(struct kvm, stat.x), KVM_STAT_VM } #define VCPU_STAT(x) { #x, offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU } @@ -119,7 +120,7 @@ static unsigned long num_core_regs(void) */ unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu) { - return num_core_regs(); + return num_core_regs() + kvm_arm_num_coproc_regs(vcpu); } /** @@ -138,7 +139,7 @@ int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *uindices) uindices++; } - return 0; + return kvm_arm_copy_coproc_indices(vcpu, uindices); } int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg) @@ -151,7 +152,7 @@ int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg) if ((reg->id & KVM_REG_ARM_COPROC_MASK) == KVM_REG_ARM_CORE) return get_core_reg(vcpu, reg); - return -EINVAL; + return kvm_arm_coproc_get_reg(vcpu, reg); } int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg) @@ -164,7 +165,7 @@ int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg) if ((reg->id & KVM_REG_ARM_COPROC_MASK) == KVM_REG_ARM_CORE) return set_core_reg(vcpu, reg); - return -EINVAL; + return kvm_arm_coproc_set_reg(vcpu, reg); } int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, |