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author | Alex Bennée <alex.bennee@linaro.org> | 2015-07-07 19:29:54 +0300 |
---|---|---|
committer | Marc Zyngier <marc.zyngier@arm.com> | 2015-07-21 14:47:08 +0300 |
commit | 21b6f32f9471284f6d4621fc8be71719266db557 (patch) | |
tree | 4a506a24a9b053193ae5a617b47fbba20b8e8e6a /arch | |
parent | 8ab30c1538b14424015e45063c41d509b24c1dea (diff) | |
download | linux-21b6f32f9471284f6d4621fc8be71719266db557.tar.xz |
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>
Diffstat (limited to 'arch')
-rw-r--r-- | arch/arm64/include/uapi/asm/kvm.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/arch/arm64/include/uapi/asm/kvm.h b/arch/arm64/include/uapi/asm/kvm.h index d26832022127..d82f3f316ba4 100644 --- a/arch/arm64/include/uapi/asm/kvm.h +++ b/arch/arm64/include/uapi/asm/kvm.h @@ -100,12 +100,39 @@ struct kvm_sregs { struct kvm_fpu { }; +/* + * See v8 ARM ARM D7.3: Debug Registers + * + * The architectural limit is 16 debug registers of each type although + * in practice there are usually less (see ID_AA64DFR0_EL1). + * + * Although the control registers are architecturally defined as 32 + * bits wide we use a 64 bit structure here to keep parity with + * KVM_GET/SET_ONE_REG behaviour which treats all system registers as + * 64 bit values. It also allows for the possibility of the + * architecture expanding the control registers without having to + * change the userspace ABI. + */ +#define KVM_ARM_MAX_DBG_REGS 16 struct kvm_guest_debug_arch { + __u64 dbg_bcr[KVM_ARM_MAX_DBG_REGS]; + __u64 dbg_bvr[KVM_ARM_MAX_DBG_REGS]; + __u64 dbg_wcr[KVM_ARM_MAX_DBG_REGS]; + __u64 dbg_wvr[KVM_ARM_MAX_DBG_REGS]; }; struct kvm_debug_exit_arch { + __u32 hsr; + __u64 far; /* used for watchpoints */ }; +/* + * Architecture specific defines for kvm_guest_debug->control + */ + +#define KVM_GUESTDBG_USE_SW_BP (1 << 16) +#define KVM_GUESTDBG_USE_HW (1 << 17) + struct kvm_sync_regs { }; |