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9a8797722e
VMbus ring buffer are shared with host and it's need to be accessed via extra address space of Isolation VM with AMD SNP support. This patch is to map the ring buffer address in extra address space via vmap_pfn(). Hyperv set memory host visibility hvcall smears data in the ring buffer and so reset the ring buffer memory to zero after mapping. Reviewed-by: Michael Kelley <mikelley@microsoft.com> Signed-off-by: Tianyu Lan <Tianyu.Lan@microsoft.com> Link: https://lore.kernel.org/r/20211025122116.264793-10-ltykernel@gmail.com Signed-off-by: Wei Liu <wei.liu@kernel.org>
32 lines
783 B
Text
32 lines
783 B
Text
# SPDX-License-Identifier: GPL-2.0
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menu "Microsoft Hyper-V guest support"
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config HYPERV
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tristate "Microsoft Hyper-V client drivers"
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depends on ACPI && ((X86 && X86_LOCAL_APIC && HYPERVISOR_GUEST) \
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|| (ARM64 && !CPU_BIG_ENDIAN))
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select PARAVIRT
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select X86_HV_CALLBACK_VECTOR if X86
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select VMAP_PFN
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help
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Select this option to run Linux as a Hyper-V client operating
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system.
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config HYPERV_TIMER
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def_bool HYPERV && X86
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config HYPERV_UTILS
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tristate "Microsoft Hyper-V Utilities driver"
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depends on HYPERV && CONNECTOR && NLS
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help
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Select this option to enable the Hyper-V Utilities.
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config HYPERV_BALLOON
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tristate "Microsoft Hyper-V Balloon driver"
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depends on HYPERV
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select PAGE_REPORTING
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help
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Select this option to enable Hyper-V Balloon driver.
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endmenu
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