The patch below does not apply to the 6.6-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y git checkout FETCH_HEAD git cherry-pick -x b7b88b4939e71ef2aed8238976a2bbabcb63a790 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2025082132-trimmer-going-5925@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^..
Possible dependencies:
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From b7b88b4939e71ef2aed8238976a2bbabcb63a790 Mon Sep 17 00:00:00 2001 From: Bharat Bhushan bbhushan2@marvell.com Date: Thu, 22 May 2025 15:36:25 +0530 Subject: [PATCH] crypto: octeontx2 - Fix address alignment issue on ucode loading
octeontx2 crypto driver allocates memory using kmalloc/kzalloc, and uses this memory for dma (does dma_map_single()). It assumes that kmalloc/kzalloc will return 128-byte aligned address. But kmalloc/kzalloc returns 8-byte aligned address after below changes: "9382bc44b5f5 arm64: allow kmalloc() caches aligned to the smaller cache_line_size()"
Completion address should be 32-Byte alignment when loading microcode.
Signed-off-by: Bharat Bhushan bbhushan2@marvell.com Cc: stable@vger.kernel.org # v6.5+ Signed-off-by: Herbert Xu herbert@gondor.apana.org.au
diff --git a/drivers/crypto/marvell/octeontx2/otx2_cptpf_ucode.c b/drivers/crypto/marvell/octeontx2/otx2_cptpf_ucode.c index 9095dea2748d..56645b3eb717 100644 --- a/drivers/crypto/marvell/octeontx2/otx2_cptpf_ucode.c +++ b/drivers/crypto/marvell/octeontx2/otx2_cptpf_ucode.c @@ -1491,12 +1491,13 @@ int otx2_cpt_discover_eng_capabilities(struct otx2_cptpf_dev *cptpf) union otx2_cpt_opcode opcode; union otx2_cpt_res_s *result; union otx2_cpt_inst_s inst; + dma_addr_t result_baddr; dma_addr_t rptr_baddr; struct pci_dev *pdev; - u32 len, compl_rlen; int timeout = 10000; + void *base, *rptr; int ret, etype; - void *rptr; + u32 len;
/* * We don't get capabilities if it was already done @@ -1519,22 +1520,28 @@ int otx2_cpt_discover_eng_capabilities(struct otx2_cptpf_dev *cptpf) if (ret) goto delete_grps;
- compl_rlen = ALIGN(sizeof(union otx2_cpt_res_s), OTX2_CPT_DMA_MINALIGN); - len = compl_rlen + LOADFVC_RLEN; + /* Allocate extra memory for "rptr" and "result" pointer alignment */ + len = LOADFVC_RLEN + ARCH_DMA_MINALIGN + + sizeof(union otx2_cpt_res_s) + OTX2_CPT_RES_ADDR_ALIGN;
- result = kzalloc(len, GFP_KERNEL); - if (!result) { + base = kzalloc(len, GFP_KERNEL); + if (!base) { ret = -ENOMEM; goto lf_cleanup; } - rptr_baddr = dma_map_single(&pdev->dev, (void *)result, len, - DMA_BIDIRECTIONAL); + + rptr = PTR_ALIGN(base, ARCH_DMA_MINALIGN); + rptr_baddr = dma_map_single(&pdev->dev, rptr, len, DMA_BIDIRECTIONAL); if (dma_mapping_error(&pdev->dev, rptr_baddr)) { dev_err(&pdev->dev, "DMA mapping failed\n"); ret = -EFAULT; - goto free_result; + goto free_rptr; } - rptr = (u8 *)result + compl_rlen; + + result = (union otx2_cpt_res_s *)PTR_ALIGN(rptr + LOADFVC_RLEN, + OTX2_CPT_RES_ADDR_ALIGN); + result_baddr = ALIGN(rptr_baddr + LOADFVC_RLEN, + OTX2_CPT_RES_ADDR_ALIGN);
/* Fill in the command */ opcode.s.major = LOADFVC_MAJOR_OP; @@ -1546,14 +1553,14 @@ int otx2_cpt_discover_eng_capabilities(struct otx2_cptpf_dev *cptpf) /* 64-bit swap for microcode data reads, not needed for addresses */ cpu_to_be64s(&iq_cmd.cmd.u); iq_cmd.dptr = 0; - iq_cmd.rptr = rptr_baddr + compl_rlen; + iq_cmd.rptr = rptr_baddr; iq_cmd.cptr.u = 0;
for (etype = 1; etype < OTX2_CPT_MAX_ENG_TYPES; etype++) { result->s.compcode = OTX2_CPT_COMPLETION_CODE_INIT; iq_cmd.cptr.s.grp = otx2_cpt_get_eng_grp(&cptpf->eng_grps, etype); - otx2_cpt_fill_inst(&inst, &iq_cmd, rptr_baddr); + otx2_cpt_fill_inst(&inst, &iq_cmd, result_baddr); lfs->ops->send_cmd(&inst, 1, &cptpf->lfs.lf[0]); timeout = 10000;
@@ -1576,8 +1583,8 @@ int otx2_cpt_discover_eng_capabilities(struct otx2_cptpf_dev *cptpf)
error_no_response: dma_unmap_single(&pdev->dev, rptr_baddr, len, DMA_BIDIRECTIONAL); -free_result: - kfree(result); +free_rptr: + kfree(base); lf_cleanup: otx2_cptlf_shutdown(lfs); delete_grps: