Re: [PATCH v1 1/7] x86/mm: Move force_dma_unencrypted() to common code

[Tom Lendacky]

On 6/9/21 4:55 PM, Kuppuswamy Sathyanarayanan wrote:
> From: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>
> 
> diff --git a/arch/x86/mm/mem_encrypt_common.c b/arch/x86/mm/mem_encrypt_common.c
> new file mode 100644
> index 000000000000..4a9a4d5f36cd
> --- /dev/null
> +++ b/arch/x86/mm/mem_encrypt_common.c
> @@ -0,0 +1,20 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Memory Encryption Support Common Code
> + *
> + * Copyright (C) 2021 Intel Corporation
> + *
> + * Author: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@xxxxxxxxxxxxxxx>
> + */
> +
> +#include <asm/mem_encrypt_common.h>
> +#include <linux/dma-mapping.h>
> +
> +/* Override for DMA direct allocation check - ARCH_HAS_FORCE_DMA_UNENCRYPTED */
> +bool force_dma_unencrypted(struct device *dev)
> +{
> +	if (sev_active() || sme_active())
> +		return amd_force_dma_unencrypted(dev);
> +
> +	return false;

Until other stuff is added, this should probably just be:

	return amd_force_dma_unencrypted(dev);

Thanks,
Tom

> +}
>