[PATCH] crypto: fsl_hash: fix flush dcache alignment in caam_hash()

[Peng Fan]

On Fri, Feb 28, 2025 at 09:00:28AM +0100, Benjamin Lemouzy wrote:
>Hi Peng,
>
>On Fri, 28 Feb 2025 12:17:56 +0800
>Peng Fan <peng.fan at oss.nxp.com> wrote:
>
>> Hi Benjamin,
>> 
>> On Fri, Feb 21, 2025 at 08:05:01AM +0100, blemouzy.ml at gmail.com wrote:
>> >From: Benjamin Lemouzy <blemouzy at centralp.fr>
>> >
>> >Loading a FIT kernel image with hash hardware acceleration enabled
>> >(CONFIG_SHA_HW_ACCEL=y) displays the following CACHE warning:  
>> 
>> Sorry for my lazyness, the following patch should be able to solve
>> your issue. I will prepare a PR soon.
>> https://patchwork.ozlabs.org/project/uboot/patch/1bd862e53b50825f6030bf9f212127c776fff881.camel@googlemail.com/
>
>I just tested the suggested patch and it's not working:

Thanks for help testing.

Thanks,
Peng

>
>	## Loading kernel from FIT Image at 16000000 ...
>	   Using 'conf-imx6q-xxx.dtb' configuration
>	   Trying 'kernel-1' kernel subimage
>		 Description:  Linux kernel
>		 Type:         Kernel Image
>		 Compression:  uncompressed
>		 Data Start:   0x16000128
>		 Data Size:    7600544 Bytes = 7.2 MiB
>		 Architecture: ARM
>		 OS:           Linux
>		 Load Address: 0x10008000
>		 Entry Point:  0x10008000
>		 Hash algo:    sha256
>		 Hash value:   a664f6c4d4ac97e2d867b8ee4f38cf934a48f99c65f19f824162b7ca077cb0d9
>	   Verifying Hash Integrity ... sha256+ OK
>	## Loading ramdisk from FIT Image at 16000000 ...
>	   Using 'conf-imx6q-xxx.dtb' configuration
>	   Trying 'ramdisk-1' ramdisk subimage
>		 Description:  ctp-image-base-initramfs
>		 Type:         RAMDisk Image
>		 Compression:  uncompressed
>		 Data Start:   0x1676d6d4
>		 Data Size:    12635898 Bytes = 12.1 MiB
>		 Architecture: ARM
>		 OS:           Linux
>		 Load Address: 0x13000000
>		 Entry Point:  unavailable
>		 Hash algo:    sha256
>		 Hash value:   e1fe9087261f33679b95cd82b387317fa31b58f6365406fad1df1f27d46923e9
>	   Verifying Hash Integrity ... sha256CAAM was not setup properly or it is faulty
>	 error!
>	Bad hash value for 'hash-1' hash node in 'ramdisk-1' image node
>	Bad Data Hash
>	Ramdisk image is corrupt or invalid
>
>Benjamin
>
>> Thanks,
>> Peng
>> >
>> >    [...]
>> >    Trying 'kernel-1' kernel subimage
>> >    [...]
>> >    Verifying Hash Integrity ... sha256CACHE: Misaligned operation at
>> >range [16000128, 1673fae8]
>> >    [...]
>> >    Trying 'ramdisk-1' ramdisk subimage
>> >    [...]
>> >    Verifying Hash Integrity ... sha256CACHE: Misaligned operation at
>> >range [1676d6d4, 1737a5d4]
>> >    [...]
>> >    Trying 'fdt-imx6q-xxx.dtb' fdt subimage
>> >    [...]
>> >    Verifying Hash Integrity ... sha256CACHE: Misaligned operation at
>> >range [1673fbdc, 1674b0dc]
>> >    [...]
>> >
>> >This patch fixes it.
>> >
>> >Tested on:
>> >- i.MX 6 custom board
>> >- LS1021A custom board
>> >
>> >Signed-off-by: Benjamin Lemouzy <blemouzy at centralp.fr>
>> >---
>> > drivers/crypto/fsl/fsl_hash.c | 6 ++++--
>> > 1 file changed, 4 insertions(+), 2 deletions(-)
>> >
>> >diff --git a/drivers/crypto/fsl/fsl_hash.c
>> >b/drivers/crypto/fsl/fsl_hash.c index 79b32e2627..b721c86609 100644
>> >--- a/drivers/crypto/fsl/fsl_hash.c
>> >+++ b/drivers/crypto/fsl/fsl_hash.c
>> >@@ -183,6 +183,7 @@ int caam_hash(const unsigned char *pbuf,
>> >unsigned int buf_len,
>> > {
>> > 	int ret = 0;
>> > 	uint32_t *desc;
>> >+	unsigned long pbuf_aligned;
>> > 	unsigned int size;
>> > 
>> > 	desc = malloc_cache_aligned(sizeof(int) *
>> > MAX_CAAM_DESCSIZE);
>> >@@ -191,8 +192,9 @@ int caam_hash(const unsigned char *pbuf,
>> >unsigned int buf_len,
>> > 		return -ENOMEM;
>> > 	}
>> > 
>> >-	size = ALIGN(buf_len, ARCH_DMA_MINALIGN);
>> >-	flush_dcache_range((unsigned long)pbuf, (unsigned long)pbuf
>> >+ size);
>> >+	pbuf_aligned = ALIGN_DOWN((unsigned long)pbuf,
>> >ARCH_DMA_MINALIGN);
>> >+	size = ALIGN(buf_len + ((unsigned long)pbuf -
>> >pbuf_aligned), ARCH_DMA_MINALIGN);
>> >+	flush_dcache_range(pbuf_aligned, pbuf_aligned + size);
>> > 
>> > 	inline_cnstr_jobdesc_hash(desc, pbuf, buf_len, pout,
>> > 				  driver_hash[algo].alg_type,
>> >-- 
>> >2.43.0
>> >  
>