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ca834defd3
Prepare for replacing the KVM copy xstate to user function by extending copy_xstate_to_uabi_buf() with a pkru argument which allows the caller to hand in the pkru value, which is required for KVM because the guest PKRU is not accessible via current. Fixup all callsites accordingly. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Borislav Petkov <bp@suse.de> Link: https://lkml.kernel.org/r/20211015011539.191902137@linutronix.de
21 lines
589 B
C
21 lines
589 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __X86_KERNEL_FPU_XSTATE_H
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#define __X86_KERNEL_FPU_XSTATE_H
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#include <asm/cpufeature.h>
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#include <asm/fpu/xstate.h>
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static inline void xstate_init_xcomp_bv(struct xregs_state *xsave, u64 mask)
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{
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/*
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* XRSTORS requires these bits set in xcomp_bv, or it will
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* trigger #GP:
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*/
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if (cpu_feature_enabled(X86_FEATURE_XSAVES))
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xsave->header.xcomp_bv = mask | XCOMP_BV_COMPACTED_FORMAT;
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}
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extern void __copy_xstate_to_uabi_buf(struct membuf to, struct xregs_state *xsave,
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u32 pkru_val, enum xstate_copy_mode copy_mode);
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#endif
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