49d8e36618
commit 28a2775217b17208811fa43a9e96bd1fdf417b86 upstream Having everything in nospec-branch.h creates a hell of dependencies when adding the prctl based switching mechanism. Move everything which is not required in nospec-branch.h to spec-ctrl.h and fix up the includes in the relevant files. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Reviewed-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: David Woodhouse <dwmw@amazon.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Srivatsa S. Bhat <srivatsa@csail.mit.edu> Reviewed-by: Matt Helsley (VMware) <matt.helsley@gmail.com> Reviewed-by: Alexey Makhalov <amakhalov@vmware.com> Reviewed-by: Bo Gan <ganb@vmware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
22 lines
670 B
C
22 lines
670 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_X86_SPECCTRL_H_
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#define _ASM_X86_SPECCTRL_H_
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#include <asm/nospec-branch.h>
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/*
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* On VMENTER we must preserve whatever view of the SPEC_CTRL MSR
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* the guest has, while on VMEXIT we restore the host view. This
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* would be easier if SPEC_CTRL were architecturally maskable or
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* shadowable for guests but this is not (currently) the case.
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* Takes the guest view of SPEC_CTRL MSR as a parameter.
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*/
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extern void x86_spec_ctrl_set_guest(u64);
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extern void x86_spec_ctrl_restore_host(u64);
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/* AMD specific Speculative Store Bypass MSR data */
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extern u64 x86_amd_ls_cfg_base;
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extern u64 x86_amd_ls_cfg_rds_mask;
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#endif
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