evie/android_kernel_oneplus_msm8998
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Merge "iommu/arm-smmu: support mapping before enabling S1 translations"

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Linux Build Service Account 2016-11-15 04:07:45 -08:00 • committed by Gerrit - the friendly Code Review server
commit 24eb8e0963
3 changed files with 52 additions and 1 deletions
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50
drivers/iommu/arm-smmu.c
View file

@ -528,6 +528,8 @@ static bool arm_smmu_is_static_cb(struct arm_smmu_device *smmu);
static bool arm_smmu_is_slave_side_secure(struct arm_smmu_domain *smmu_domain);
static bool arm_smmu_has_secure_vmid(struct arm_smmu_domain *smmu_domain);
static int arm_smmu_enable_s1_translations(struct arm_smmu_domain *smmu_domain);
static struct arm_smmu_domain *to_smmu_domain(struct iommu_domain *dom)
{
return container_of(dom, struct arm_smmu_domain, domain);
@ -1604,7 +1606,8 @@ static void arm_smmu_init_context_bank(struct arm_smmu_domain *smmu_domain,
/* SCTLR */
reg = SCTLR_CFCFG | SCTLR_CFIE | SCTLR_CFRE | SCTLR_EAE_SBOP;
if (!(smmu_domain->attributes & (1 << DOMAIN_ATTR_S1_BYPASS)) ||
if ((!(smmu_domain->attributes & (1 << DOMAIN_ATTR_S1_BYPASS)) &&
!(smmu_domain->attributes & (1 << DOMAIN_ATTR_EARLY_MAP))) ||
!stage1)
reg |= SCTLR_M;
if (stage1)
@ -3043,6 +3046,11 @@ static int arm_smmu_domain_get_attr(struct iommu_domain *domain,
ret = 0;
break;
}
case DOMAIN_ATTR_EARLY_MAP:
*((int *)data) = !!(smmu_domain->attributes
& (1 << DOMAIN_ATTR_EARLY_MAP));
ret = 0;
break;
default:
ret = -ENODEV;
break;
@ -3148,6 +3156,24 @@ static int arm_smmu_domain_set_attr(struct iommu_domain *domain,
smmu_domain->attributes |= 1 << DOMAIN_ATTR_FAST;
ret = 0;
break;
case DOMAIN_ATTR_EARLY_MAP: {
int early_map = *((int *)data);
ret = 0;
if (early_map) {
smmu_domain->attributes |=
1 << DOMAIN_ATTR_EARLY_MAP;
} else {
if (smmu_domain->smmu)
ret = arm_smmu_enable_s1_translations(
smmu_domain);
if (!ret)
smmu_domain->attributes &=
~(1 << DOMAIN_ATTR_EARLY_MAP);
}
break;
}
default:
ret = -ENODEV;
break;
@ -3158,6 +3184,28 @@ out_unlock:
return ret;
}
static int arm_smmu_enable_s1_translations(struct arm_smmu_domain *smmu_domain)
{
struct arm_smmu_cfg *cfg = &smmu_domain->cfg;
struct arm_smmu_device *smmu = smmu_domain->smmu;
void __iomem *cb_base;
u32 reg;
int ret;
cb_base = ARM_SMMU_CB_BASE(smmu) + ARM_SMMU_CB(smmu, cfg->cbndx);
ret = arm_smmu_enable_clocks(smmu);
if (ret)
return ret;
reg = readl_relaxed(cb_base + ARM_SMMU_CB_SCTLR);
reg |= SCTLR_M;
writel_relaxed(reg, cb_base + ARM_SMMU_CB_SCTLR);
arm_smmu_disable_clocks(smmu);
return ret;
}
static int arm_smmu_dma_supported(struct iommu_domain *domain,
struct device *dev, u64 mask)
{

2
drivers/iommu/iommu-debug.c
View file

@ -70,6 +70,8 @@ static const char *iommu_debug_attr_to_string(enum iommu_attr attr)
return "DOMAIN_ATTR_S1_BYPASS";
case DOMAIN_ATTR_FAST:
return "DOMAIN_ATTR_FAST";
case DOMAIN_ATTR_EARLY_MAP:
return "DOMAIN_ATTR_EARLY_MAP";
default:
return "Unknown attr!";
}

1
include/linux/iommu.h
View file

@ -133,6 +133,7 @@ enum iommu_attr {
DOMAIN_ATTR_S1_BYPASS,
DOMAIN_ATTR_FAST,
DOMAIN_ATTR_PGTBL_INFO,
DOMAIN_ATTR_EARLY_MAP,
DOMAIN_ATTR_MAX,
};