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dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=jcrouse@codeaurora.org From: Jordan Crouse To: freedreno@lists.freedesktop.org Subject: [PATCH v3 04/16] iommu/arm-smmu: Add support for DOMAIN_ATTR_SPLIT_TABLES Date: Wed, 29 May 2019 14:54:40 -0600 Message-Id: <1559163292-4792-5-git-send-email-jcrouse@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1559163292-4792-1-git-send-email-jcrouse@codeaurora.org> References: <1559163292-4792-1-git-send-email-jcrouse@codeaurora.org> Cc: jean-philippe.brucker@arm.com, linux-arm-msm@vger.kernel.org, Will Deacon , dianders@chromium.org, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, hoegsberg@google.com, Robin Murphy , linux-arm-kernel@lists.infradead.org X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: iommu-bounces@lists.linux-foundation.org Errors-To: iommu-bounces@lists.linux-foundation.org If DOMAIN_ATTR_SPLIT_TABLES is specified for a domain pass ARM_64_LPAE_SPLIT_S1 to io_pgtable_ops to allocate and initialize TTBR0 and TTBR1 pagetables. v3: Moved all the pagetable specific work into io-pgtable-arm in previous patch Signed-off-by: Jordan Crouse --- drivers/iommu/arm-smmu.c | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c index 7537639..33e6928 100644 --- a/drivers/iommu/arm-smmu.c +++ b/drivers/iommu/arm-smmu.c @@ -260,6 +260,7 @@ struct arm_smmu_domain { bool non_strict; struct mutex init_mutex; /* Protects smmu pointer */ spinlock_t cb_lock; /* Serialises ATS1* ops and TLB syncs */ + u32 attributes; struct iommu_domain domain; }; @@ -835,7 +836,11 @@ static int arm_smmu_init_domain_context(struct iommu_domain *domain, ias = smmu->va_size; oas = smmu->ipa_size; if (cfg->fmt == ARM_SMMU_CTX_FMT_AARCH64) { - fmt = ARM_64_LPAE_S1; + if (smmu_domain->attributes & + (1 << DOMAIN_ATTR_SPLIT_TABLES)) + fmt = ARM_64_LPAE_SPLIT_S1; + else + fmt = ARM_64_LPAE_S1; } else if (cfg->fmt == ARM_SMMU_CTX_FMT_AARCH32_L) { fmt = ARM_32_LPAE_S1; ias = min(ias, 32UL); @@ -1622,6 +1627,10 @@ static int arm_smmu_domain_get_attr(struct iommu_domain *domain, case DOMAIN_ATTR_NESTING: *(int *)data = (smmu_domain->stage == ARM_SMMU_DOMAIN_NESTED); return 0; + case DOMAIN_ATTR_SPLIT_TABLES: + *(int *)data = !!(smmu_domain->attributes & + (1 << DOMAIN_ATTR_SPLIT_TABLES)); + return 0; default: return -ENODEV; } @@ -1662,6 +1671,11 @@ static int arm_smmu_domain_set_attr(struct iommu_domain *domain, else smmu_domain->stage = ARM_SMMU_DOMAIN_S1; break; + case DOMAIN_ATTR_SPLIT_TABLES: + if (*((int *)data)) + smmu_domain->attributes |= + (1 << DOMAIN_ATTR_SPLIT_TABLES); + break; default: ret = -ENODEV; } -- 2.7.4 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu