lkml.org 
[lkml]   [2019]   [Jun]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 5/6] iommu/vt-d: Cleanup after delegating DMA domain to generic iommu
Date
From: Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>

[No functional changes]

1. Starting with commit df4f3c603aeb ("iommu/vt-d: Remove static identity
map code") there are no callers for iommu_prepare_rmrr_dev() but the
implementation of the function still exists, so remove it. Also, as a
ripple effect remove get_domain_for_dev() and iommu_prepare_identity_map()
because they aren't being used either.

2. init_dmars() runs the same loop (for_each_active_iommu(iommu, drhd))
over different functions back to back. So, remove the duplicate loop to
make it a single for_each_active_iommu().

3. Cleanup few double spaces.

Cc: Joerg Roedel <joro@8bytes.org>
Cc: Ashok Raj <ashok.raj@intel.com>
Cc: Lu Baolu <baolu.lu@linux.intel.com>
Cc: Sohil Mehta <sohil.mehta@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Signed-off-by: Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>
---
drivers/iommu/intel-iommu.c | 68 ++++---------------------------------
1 file changed, 6 insertions(+), 62 deletions(-)

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index d1cd7e449161..d60cf0fd9500 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -909,7 +909,6 @@ static struct dma_pte *pfn_to_dma_pte(struct dmar_domain *domain,
return pte;
}

-
/* return address's pte at specific level */
static struct dma_pte *dma_pfn_level_pte(struct dmar_domain *domain,
unsigned long pfn,
@@ -1578,7 +1577,6 @@ static void iommu_disable_translation(struct intel_iommu *iommu)
raw_spin_unlock_irqrestore(&iommu->register_lock, flag);
}

-
static int iommu_init_domains(struct intel_iommu *iommu)
{
u32 ndomains, nlongs;
@@ -1616,8 +1614,6 @@ static int iommu_init_domains(struct intel_iommu *iommu)
return -ENOMEM;
}

-
-
/*
* If Caching mode is set, then invalid translations are tagged
* with domain-id 0, hence we need to pre-allocate it. We also
@@ -2649,29 +2645,6 @@ static struct dmar_domain *set_domain_for_dev(struct device *dev,
return domain;
}

-static struct dmar_domain *get_domain_for_dev(struct device *dev, int gaw)
-{
- struct dmar_domain *domain, *tmp;
-
- domain = find_domain(dev);
- if (domain)
- goto out;
-
- domain = find_or_alloc_domain(dev, gaw);
- if (!domain)
- goto out;
-
- tmp = set_domain_for_dev(dev, domain);
- if (!tmp || domain != tmp) {
- domain_exit(domain);
- domain = tmp;
- }
-
-out:
-
- return domain;
-}
-
static int iommu_domain_identity_map(struct dmar_domain *domain,
unsigned long long start,
unsigned long long end)
@@ -2736,33 +2709,6 @@ static int domain_prepare_identity_map(struct device *dev,
return iommu_domain_identity_map(domain, start, end);
}

-static int iommu_prepare_identity_map(struct device *dev,
- unsigned long long start,
- unsigned long long end)
-{
- struct dmar_domain *domain;
- int ret;
-
- domain = get_domain_for_dev(dev, DEFAULT_DOMAIN_ADDRESS_WIDTH);
- if (!domain)
- return -ENOMEM;
-
- ret = domain_prepare_identity_map(dev, domain, start, end);
- if (ret)
- domain_exit(domain);
-
- return ret;
-}
-
-static inline int iommu_prepare_rmrr_dev(struct dmar_rmrr_unit *rmrr,
- struct device *dev)
-{
- if (dev->archdata.iommu == DUMMY_DEVICE_DOMAIN_INFO)
- return 0;
- return iommu_prepare_identity_map(dev, rmrr->base_address,
- rmrr->end_address);
-}
-
static int md_domain_init(struct dmar_domain *domain, int guest_width);

static int __init si_domain_init(int hw)
@@ -3306,14 +3252,13 @@ static int __init init_dmars(void)
if (pasid_supported(iommu))
intel_svm_init(iommu);
#endif
- }

- /*
- * Now that qi is enabled on all iommus, set the root entry and flush
- * caches. This is required on some Intel X58 chipsets, otherwise the
- * flush_context function will loop forever and the boot hangs.
- */
- for_each_active_iommu(iommu, drhd) {
+ /*
+ * Now that qi is enabled on all iommus, set the root entry and
+ * flush caches. This is required on some Intel X58 chipsets,
+ * otherwise the flush_context function will loop forever and
+ * the boot hangs.
+ */
iommu_flush_write_buffer(iommu);
iommu_set_root_entry(iommu);
iommu->flush.flush_context(iommu, 0, 0, 0, DMA_CCMD_GLOBAL_INVL);
@@ -4058,7 +4003,6 @@ static void __init init_iommu_pm_ops(void)
static inline void init_iommu_pm_ops(void) {}
#endif /* CONFIG_PM */

-
int __init dmar_parse_one_rmrr(struct acpi_dmar_header *header, void *arg)
{
struct acpi_dmar_reserved_memory *rmrr;
--
2.17.1
\
 
 \ /
  Last update: 2019-06-09 04:46    [W:0.074 / U:8.444 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site