x86: hv: Add function to allocate zeroed page for Hyper-V
Hyper-V assumes page size to be 4K. While this assumption holds true on x86 architecture, it might not be true for ARM64 architecture. Hence define hyper-v specific function to allocate a zeroed page which can have a different implementation on ARM64 architecture to handle the conflict between hyper-v's assumed page size and actual guest page size. Signed-off-by: NHimadri Pandya <himadri18.07@gmail.com> Reviewed-by: NMichael Kelley <mikelley@microsoft.com> Signed-off-by: NSasha Levin <sashal@kernel.org>
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