linux-kernel - Re: [PATCH 1/2] crypto: iaa

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Date: Mon, 18 Dec 2023 14:47:56 -0700
From: Dave Jiang <dave.jiang@...el.com>
To: Tom Zanussi <tom.zanussi@...ux.intel.com>, <herbert@...dor.apana.org.au>,
	<davem@...emloft.net>, <fenghua.yu@...el.com>
CC: <tony.luck@...el.com>, <jacob.jun.pan@...el.com>,
	<christophe.jaillet@...adoo.fr>, <linux-kernel@...r.kernel.org>,
	<linux-crypto@...r.kernel.org>, <dmaengine@...r.kernel.org>
Subject: Re: [PATCH 1/2] crypto: iaa - Change desc->priv to 0



On 12/18/23 13:47, Tom Zanussi wrote:
> In order for shared workqeues to work properly, desc->priv should be
> set to 0 rather than 1.  The need for this is described in commit
> f5ccf55e1028 (dmaengine/idxd: Re-enable kernel workqueue under DMA
> API), so we need to make IAA consistent with IOMMU settings, otherwise
> we get:
> 
>   [  141.948389] IOMMU: dmar15: Page request in Privilege Mode
>   [  141.948394] dmar15: Invalid page request: 2000026a100101 ffffb167
> 
> Dedicated workqueues ignore this field and are unaffected.
> 
> Signed-off-by: Tom Zanussi <tom.zanussi@...ux.intel.com>

Reviewed-by: Dave Jiang <dave.jiang@...el.com>

> ---
>  drivers/crypto/intel/iaa/iaa_crypto_main.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/crypto/intel/iaa/iaa_crypto_main.c b/drivers/crypto/intel/iaa/iaa_crypto_main.c
> index eafa2dd7a5bb..5093361b0107 100644
> --- a/drivers/crypto/intel/iaa/iaa_crypto_main.c
> +++ b/drivers/crypto/intel/iaa/iaa_crypto_main.c
> @@ -484,7 +484,7 @@ static int decompress_header(struct iaa_device_compression_mode *device_mode,
>  
>  	desc->decompr_flags = mode->gen_decomp_table_flags;
>  
> -	desc->priv = 1;
> +	desc->priv = 0;
>  
>  	desc->completion_addr = idxd_desc->compl_dma;
>  
> @@ -1255,7 +1255,7 @@ static int iaa_compress(struct crypto_tfm *tfm,	struct acomp_req *req,
>  		IDXD_OP_FLAG_RD_SRC2_AECS | IDXD_OP_FLAG_CC;
>  	desc->opcode = IAX_OPCODE_COMPRESS;
>  	desc->compr_flags = IAA_COMP_FLAGS;
> -	desc->priv = 1;
> +	desc->priv = 0;
>  
>  	desc->src1_addr = (u64)src_addr;
>  	desc->src1_size = slen;
> @@ -1409,7 +1409,7 @@ static int iaa_compress_verify(struct crypto_tfm *tfm, struct acomp_req *req,
>  	desc->flags = IDXD_OP_FLAG_CRAV | IDXD_OP_FLAG_RCR | IDXD_OP_FLAG_CC;
>  	desc->opcode = IAX_OPCODE_DECOMPRESS;
>  	desc->decompr_flags = IAA_DECOMP_FLAGS | IAA_DECOMP_SUPPRESS_OUTPUT;
> -	desc->priv = 1;
> +	desc->priv = 0;
>  
>  	desc->src1_addr = (u64)dst_addr;
>  	desc->src1_size = *dlen;
> @@ -1495,7 +1495,7 @@ static int iaa_decompress(struct crypto_tfm *tfm, struct acomp_req *req,
>  	desc->opcode = IAX_OPCODE_DECOMPRESS;
>  	desc->max_dst_size = PAGE_SIZE;
>  	desc->decompr_flags = IAA_DECOMP_FLAGS;
> -	desc->priv = 1;
> +	desc->priv = 0;
>  
>  	desc->src1_addr = (u64)src_addr;
>  	desc->dst_addr = (u64)dst_addr;