On Wed, May 06, 2015 at 05:23:16PM +0100, Alex Bennée wrote:
> Bring into line with the comments for the other structures and their
> KVM_EXIT_* cases. Also update api.txt to reflect use in kvm_run
> documentation.
>
> Signed-off-by: Alex Bennée
> Reviewed-by: David Hildenbrand
> Reviewed-by: An
On Wed, May 06, 2015 at 05:23:17PM +0100, Alex Bennée wrote:
> Currently x86, powerpc and soon arm64 use the same two architecture
> specific bits for guest debug support for software and hardware
> breakpoints. This makes the shared values explicit while leaving the
> gate open for another archite
On Wed, May 06, 2015 at 05:23:18PM +0100, Alex Bennée wrote:
> 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 pos
On 08/05/2015 11:23, Christoffer Dall wrote:
> On Wed, May 06, 2015 at 05:23:17PM +0100, Alex Bennée wrote:
>> Currently x86, powerpc and soon arm64 use the same two architecture
>> specific bits for guest debug support for software and hardware
>> breakpoints. This makes the shared values explic
On Wed, May 06, 2015 at 05:23:20PM +0100, Alex Bennée wrote:
> This is a precursor for later patches which will need to do more to
> setup debug state before entering the hyp.S switch code. The existing
> functionality for setting mdcr_el2 has been moved out of hyp.S and now
> uses the value kept i
On Wed, May 06, 2015 at 05:23:21PM +0100, Alex Bennée wrote:
> This adds support for SW breakpoints inserted by userspace.
>
> We do this by trapping all guest software debug exceptions to the
> hypervisor (MDCR_EL2.TDE). The exit handler sets an exit reason of
> KVM_EXIT_DEBUG with the kvm_debug_
On Wed, May 06, 2015 at 05:23:22PM +0100, Alex Bennée wrote:
> This adds support for single-stepping the guest. To do this we need to
> manipulate the guests PSTATE.SS and MDSCR_EL1.SS bits which we do in the
> kvm_arm_setup/clear_debug() so we don't affect the apparent state of the
> guest. Additi
On Wed, May 06, 2015 at 05:23:19PM +0100, Alex Bennée wrote:
> This commit adds a stub function to support the KVM_SET_GUEST_DEBUG
> ioctl. Any unsupported flag will return -EINVAL. For now, only
> KVM_GUESTDBG_ENABLE is supported, although it won't have any effects.
>
> Signed-off-by: Alex Bennée
On Thu, May 07, 2015 at 10:07:11AM +0100, Alex Bennée wrote:
> This is a pre-cursor to sharing the code with the guest debug support.
> This replaces the big macro that fishes data out of a fixed location
> with a more general helper macro to restore a set of debug registers. It
> uses macro substi
BSYM() should only be used when refering to local symbols in the same
assembly file which are resolved by the assembler, and not for
linker-fixed up symbols. The use of BSYM() with panic is incorrect as
the linker is involved in fixing up this relocation, and it knows
whether panic() is ARM or Thu
On Fri, 8 May 2015, Russell King wrote:
> BSYM() should only be used when refering to local symbols in the same
> assembly file which are resolved by the assembler, and not for
> linker-fixed up symbols. The use of BSYM() with panic is incorrect as
> the linker is involved in fixing up this reloc
On Fri, May 08, 2015 at 05:08:42PM +0100, Russell King wrote:
> BSYM() should only be used when refering to local symbols in the same
> assembly file which are resolved by the assembler, and not for
> linker-fixed up symbols. The use of BSYM() with panic is incorrect as
> the linker is involved in
On Thu, May 07, 2015 at 10:07:12AM +0100, Alex Bennée wrote:
> This adds support for userspace to control the HW debug registers for
> guest debug. In the debug ioctl we copy the IMPDEF defined number of
> registers into a new register set called host_debug_state. There is now
> a new vcpu paramete
On Wed, May 06, 2015 at 05:23:15PM +0100, Alex Bennée wrote:
> Hi,
>
> Here is V3 of the KVM Guest Debug support for arm64.
>
> This sees the return of hyp.S re-factoring code which has been
> expanded to handle both the save and restore legs. The HW debug patch
> then adds a simple indirection t
On Thu, May 07, 2015 at 10:07:13AM +0100, Alex Bennée wrote:
> When we are using the hardware registers for guest debug we need to deal
> with the guests access to them. There is already a mechanism for dealing
> with these accesses so we build on top of that.
>
> - any access to mdscr_el1 is no
On Thu, May 07, 2015 at 10:07:14AM +0100, Alex Bennée wrote:
> Finally advertise the KVM capability for SET_GUEST_DEBUG. Once arm
> support is added this check can be moved to the common
> kvm_vm_ioctl_check_extension() code.
>
> Signed-off-by: Alex Bennée
>
Acked-by: Christoffer Dall
_
On Thu, May 07, 2015 at 10:07:15AM +0100, Alex Bennée wrote:
> This includes trace points for:
> kvm_arch_setup_guest_debug
> kvm_arch_clear_guest_debug
> kvm_handle_guest_debug
>
> I've also added some generic register setting trace events and also a
> trace point to dump the array of hardw
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