From: Zhen Lei <thunder.leiz...@huawei.com>
Make IOMMU_DEFAULT_LAZY default for when AMD_IOMMU config is set, which
matches current behaviour.
For "fullflush" param, just call iommu_set_dma_strict(true) directly.
Since this is called from __setup(), it should occur prior to
iommu_subsys_init(). As such, since we get a strict vs lazy mode print
there, drop the prints in amd_iommu_init_dma_ops().
Also drop global flag amd_iommu_unmap_flush, as it has no purpose
any longer.
Note that we should not conflict with iommu.strict param when we set
strict mode, as that param is not for x86.
[jpg: Rebase for relocated file an drop amd_iommu_unmap_flush]
Signed-off-by: Zhen Lei <thunder.leiz...@huawei.com>
Signed-off-by: John Garry <john.ga...@huawei.com>
---
drivers/iommu/Kconfig | 2 +-
drivers/iommu/amd/amd_iommu_types.h | 6 ------
drivers/iommu/amd/init.c | 3 +--
drivers/iommu/amd/iommu.c | 6 ------
4 files changed, 2 insertions(+), 15 deletions(-)
diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig
index 4467353f981b..8c1e0f2bba0d 100644
--- a/drivers/iommu/Kconfig
+++ b/drivers/iommu/Kconfig
@@ -94,7 +94,7 @@ choice
prompt "IOMMU default DMA mode"
depends on IOMMU_DMA
- default IOMMU_DEFAULT_LAZY if INTEL_IOMMU
+ default IOMMU_DEFAULT_LAZY if (AMD_IOMMU || INTEL_IOMMU)
default IOMMU_DEFAULT_STRICT
help
This option allows an IOMMU DMA mode to be chosen at build time, to
diff --git a/drivers/iommu/amd/amd_iommu_types.h
b/drivers/iommu/amd/amd_iommu_types.h
index 94c1a7a9876d..8dbe61e2b3c1 100644
--- a/drivers/iommu/amd/amd_iommu_types.h
+++ b/drivers/iommu/amd/amd_iommu_types.h
@@ -779,12 +779,6 @@ extern u16 amd_iommu_last_bdf;
/* allocation bitmap for domain ids */
extern unsigned long *amd_iommu_pd_alloc_bitmap;
-/*
- * If true, the addresses will be flushed on unmap time, not when
- * they are reused
- */
-extern bool amd_iommu_unmap_flush;
-
/* Smallest max PASID supported by any IOMMU in the system */
extern u32 amd_iommu_max_pasid;
diff --git a/drivers/iommu/amd/init.c b/drivers/iommu/amd/init.c
index 46280e6e1535..0e6ae6d68f14 100644
--- a/drivers/iommu/amd/init.c
+++ b/drivers/iommu/amd/init.c
@@ -161,7 +161,6 @@ u16 amd_iommu_last_bdf; /* largest PCI
device id we have
to handle */
LIST_HEAD(amd_iommu_unity_map); /* a list of required unity
mappings
we find in ACPI */
-bool amd_iommu_unmap_flush; /* if true, flush on every unmap */
LIST_HEAD(amd_iommu_list); /* list of all AMD IOMMUs in the
system */
@@ -3099,7 +3098,7 @@ static int __init parse_amd_iommu_options(char *str)
{
for (; *str; ++str) {
if (strncmp(str, "fullflush", 9) == 0)
- amd_iommu_unmap_flush = true;
+ iommu_set_dma_strict(true);
if (strncmp(str, "force_enable", 12) == 0)
amd_iommu_force_enable = true;
if (strncmp(str, "off", 3) == 0)
diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index b1fbf2c83df5..32b541ee2e11 100644
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -1775,12 +1775,6 @@ void amd_iommu_domain_update(struct protection_domain
*domain)
static void __init amd_iommu_init_dma_ops(void)
{
swiotlb = (iommu_default_passthrough() || sme_me_mask) ? 1 : 0;
-
- if (amd_iommu_unmap_flush)
- pr_info("IO/TLB flush on unmap enabled\n");
- else
- pr_info("Lazy IO/TLB flushing enabled\n");
- iommu_set_dma_strict(amd_iommu_unmap_flush);
}
int __init amd_iommu_init_api(void)
--
2.26.2
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