x86/fpu: Add a pkru argument to copy_uabi_from_kernel_to_xstate().

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Both KVM (through KVM_SET_XSTATE) and ptrace (through PTRACE_SETREGSET
with NT_X86_XSTATE) ultimately call copy_uabi_from_kernel_to_xstate(),
but the canonical locations for the current PKRU value for KVM guests
and processes in a ptrace stop are different (in the kvm_vcpu_arch and
the thread_state structs respectively).

In preparation for eventually handling PKRU in
copy_uabi_to_xstate, pass in a pointer to the PKRU location.

Signed-off-by: Kyle Huey <me@kylehuey.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Link: https://lore.kernel.org/all/20221115230932.7126-3-khuey%40kylehuey.com

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Kyle Huey 2022-11-15 15:09:28 -08:00 • committed by Dave Hansen

parent 6a877d2450

commit 1c813ce030

4 changed files with 4 additions and 4 deletions

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arch/x86/kernel/fpu/core.c

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arch/x86/kernel/fpu/regset.c

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arch/x86/kernel/fpu/xstate.c

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arch/x86/kernel/fpu/xstate.h

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