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Ian Campbell
1c38a1e937
struct cpu_user_regs is currently used as both internal state
(specifically at the base of the stack) and a guest/toolstack
visible API (via struct vcpu_guest_context used by
XEN_DOMCTL_{g,s}etvcpucontext and VCPUOP_initialise).
This causes problems when we want to make the API 64-bit clean since
we don't really want to change the size of the on-stack struct.
So split into vcpu_guest_core_regs which is the API facing struct
and keep cpu_user_regs purely internal, translate between the two.
In the user API arrange for both 64- and 32-bit registers to be
included in a layout which does not differ depending on toolstack
architecture. Also switch to using the more formal banked register
names (e.g. with the _usr suffix) for clarity.
This is an ABI change. Note that the kernel doesn't currently use
this data structure so it affects the tools interface only.
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Tim Deegan <tim@xen.org>
59 lines
1.4 KiB
Python
59 lines
1.4 KiB
Python
# configuration: what needs translation
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unions = [ "vcpu_cr_regs",
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"vcpu_ar_regs" ];
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structs = [ "start_info",
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"trap_info",
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"cpu_user_regs",
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"vcpu_guest_core_regs",
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"vcpu_guest_context",
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"arch_vcpu_info",
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"vcpu_time_info",
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"vcpu_info",
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"arch_shared_info",
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"shared_info" ];
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defines = [ "__arm__",
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"__aarch64__",
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"__i386__",
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"__x86_64__",
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# arm
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# None
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# x86_{32,64}
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"FLAT_RING1_CS",
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"FLAT_RING1_DS",
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"FLAT_RING1_SS",
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"FLAT_RING3_CS64",
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"FLAT_RING3_DS64",
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"FLAT_RING3_SS64",
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"FLAT_KERNEL_CS64",
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"FLAT_KERNEL_DS64",
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"FLAT_KERNEL_SS64",
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"FLAT_KERNEL_CS",
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"FLAT_KERNEL_DS",
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"FLAT_KERNEL_SS",
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# x86_{32,64}
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"_VGCF_i387_valid",
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"VGCF_i387_valid",
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"_VGCF_in_kernel",
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"VGCF_in_kernel",
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"_VGCF_failsafe_disables_events",
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"VGCF_failsafe_disables_events",
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"_VGCF_syscall_disables_events",
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"VGCF_syscall_disables_events",
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"_VGCF_online",
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"VGCF_online",
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# all archs
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"xen_pfn_to_cr3",
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"xen_cr3_to_pfn",
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"XEN_LEGACY_MAX_VCPUS",
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"MAX_GUEST_CMDLINE" ];
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