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KVM: arm64: guest debug, define API headers
This commit defines the API headers for guest debugging. There are two architecture specific debug structures: - kvm_guest_debug_arch, allows us to pass in HW debug registers - kvm_debug_exit_arch, signals exception and possible faulting address The type of debugging being used is controlled by the architecture specific control bits of the kvm_guest_debug->control flags in the ioctl structure. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Reviewed-by: Andrew Jones <drjones@redhat.com> Acked-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
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@ -100,12 +100,39 @@ struct kvm_sregs {
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struct kvm_fpu {
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};
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/*
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* See v8 ARM ARM D7.3: Debug Registers
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*
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* The architectural limit is 16 debug registers of each type although
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* in practice there are usually less (see ID_AA64DFR0_EL1).
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*
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* Although the control registers are architecturally defined as 32
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* bits wide we use a 64 bit structure here to keep parity with
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* KVM_GET/SET_ONE_REG behaviour which treats all system registers as
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* 64 bit values. It also allows for the possibility of the
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* architecture expanding the control registers without having to
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* change the userspace ABI.
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*/
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#define KVM_ARM_MAX_DBG_REGS 16
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struct kvm_guest_debug_arch {
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__u64 dbg_bcr[KVM_ARM_MAX_DBG_REGS];
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__u64 dbg_bvr[KVM_ARM_MAX_DBG_REGS];
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__u64 dbg_wcr[KVM_ARM_MAX_DBG_REGS];
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__u64 dbg_wvr[KVM_ARM_MAX_DBG_REGS];
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};
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struct kvm_debug_exit_arch {
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__u32 hsr;
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__u64 far; /* used for watchpoints */
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};
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/*
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* Architecture specific defines for kvm_guest_debug->control
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*/
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#define KVM_GUESTDBG_USE_SW_BP (1 << 16)
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#define KVM_GUESTDBG_USE_HW (1 << 17)
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struct kvm_sync_regs {
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};
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