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    Subject[PATCH 2/7] xen: Import cpuid.h from Xen
    Date
    From: Keir Fraser <keir.fraser@citrix.com>

    Which would be used by CPUID detection later

    Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
    Signed-off-by: Sheng Yang <sheng@linux.intel.com>
    ---
    arch/x86/include/asm/xen/cpuid.h | 68 ++++++++++++++++++++++++++++++++++++++
    1 files changed, 68 insertions(+), 0 deletions(-)
    create mode 100644 arch/x86/include/asm/xen/cpuid.h

    diff --git a/arch/x86/include/asm/xen/cpuid.h b/arch/x86/include/asm/xen/cpuid.h
    new file mode 100644
    index 0000000..8787f03
    --- /dev/null
    +++ b/arch/x86/include/asm/xen/cpuid.h
    @@ -0,0 +1,68 @@
    +/******************************************************************************
    + * arch/include/asm/xen/cpuid.h
    + *
    + * CPUID interface to Xen.
    + *
    + * Permission is hereby granted, free of charge, to any person obtaining a copy
    + * of this software and associated documentation files (the "Software"), to
    + * deal in the Software without restriction, including without limitation the
    + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
    + * sell copies of the Software, and to permit persons to whom the Software is
    + * furnished to do so, subject to the following conditions:
    + *
    + * The above copyright notice and this permission notice shall be included in
    + * all copies or substantial portions of the Software.
    + *
    + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
    + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
    + * DEALINGS IN THE SOFTWARE.
    + *
    + * Copyright (c) 2007 Citrix Systems, Inc.
    + *
    + * Authors:
    + * Keir Fraser <keir.fraser@citrix.com>
    + */
    +
    +#ifndef __ASM_X86_XEN_CPUID_H__
    +#define __ASM_X86_XEN_CPUID_H__
    +
    +/* Xen identification leaves start at 0x40000000. */
    +#define XEN_CPUID_FIRST_LEAF 0x40000000
    +#define XEN_CPUID_LEAF(i) (XEN_CPUID_FIRST_LEAF + (i))
    +
    +/*
    + * Leaf 1 (0x40000000)
    + * EAX: Largest Xen-information leaf. All leaves up to an including @EAX
    + * are supported by the Xen host.
    + * EBX-EDX: "XenVMMXenVMM" signature, allowing positive identification
    + * of a Xen host.
    + */
    +#define XEN_CPUID_SIGNATURE_EBX 0x566e6558 /* "XenV" */
    +#define XEN_CPUID_SIGNATURE_ECX 0x65584d4d /* "MMXe" */
    +#define XEN_CPUID_SIGNATURE_EDX 0x4d4d566e /* "nVMM" */
    +
    +/*
    + * Leaf 2 (0x40000001)
    + * EAX[31:16]: Xen major version.
    + * EAX[15: 0]: Xen minor version.
    + * EBX-EDX: Reserved (currently all zeroes).
    + */
    +
    +/*
    + * Leaf 3 (0x40000002)
    + * EAX: Number of hypercall transfer pages. This register is always guaranteed
    + * to specify one hypercall page.
    + * EBX: Base address of Xen-specific MSRs.
    + * ECX: Features 1. Unused bits are set to zero.
    + * EDX: Features 2. Unused bits are set to zero.
    + */
    +
    +/* Does the host support MMU_PT_UPDATE_PRESERVE_AD for this guest? */
    +#define _XEN_CPUID_FEAT1_MMU_PT_UPDATE_PRESERVE_AD 0
    +#define XEN_CPUID_FEAT1_MMU_PT_UPDATE_PRESERVE_AD (1u<<0)
    +
    +#endif /* __XEN_PUBLIC_ARCH_X86_CPUID_H__ */
    --
    1.5.4.5


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