lkml.org 
[lkml]   [2019]   [Apr]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v4 5/6] powernv/iommu: use common boot option iommu.dma_mode
Date
iommu=nobypass can be replaced with iommu.dma_mode=strict.

Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
---
Documentation/admin-guide/kernel-parameters.txt | 2 --
arch/powerpc/platforms/powernv/pci-ioda.c | 23 +----------------------
drivers/iommu/Kconfig | 1 +
3 files changed, 2 insertions(+), 24 deletions(-)

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index a2df11945b33fc9..f88a8bff3c0caa0 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -1789,8 +1789,6 @@
soft
pt [x86]
nopt [x86]
- nobypass [PPC/POWERNV]
- Disable IOMMU bypass, using IOMMU for PCI devices.


iommu.dma_mode= [ARM64] Configure default dma mode. if unset, use the
diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c
index 3ead4c237ed0ec9..be0234c170316bc 100644
--- a/arch/powerpc/platforms/powernv/pci-ioda.c
+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
@@ -85,29 +85,8 @@ void pe_level_printk(const struct pnv_ioda_pe *pe, const char *level,
va_end(args);
}

-static bool pnv_iommu_bypass_disabled __read_mostly;
static bool pci_reset_phbs __read_mostly;

-static int __init iommu_setup(char *str)
-{
- if (!str)
- return -EINVAL;
-
- while (*str) {
- if (!strncmp(str, "nobypass", 8)) {
- pnv_iommu_bypass_disabled = true;
- pr_info("PowerNV: IOMMU bypass window disabled.\n");
- break;
- }
- str += strcspn(str, ",");
- if (*str == ',')
- str++;
- }
-
- return 0;
-}
-early_param("iommu", iommu_setup);
-
static int __init pci_reset_phbs_setup(char *str)
{
pci_reset_phbs = true;
@@ -2456,7 +2435,7 @@ static long pnv_pci_ioda2_setup_default_config(struct pnv_ioda_pe *pe)
return rc;
}

- if (!pnv_iommu_bypass_disabled)
+ if (IOMMU_DMA_MODE_IS_PASSTHROUGH())
pnv_pci_ioda2_set_bypass(pe, true);

return 0;
diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig
index d88dc44d60d88ea..b053eeaa82ebca8 100644
--- a/drivers/iommu/Kconfig
+++ b/drivers/iommu/Kconfig
@@ -77,6 +77,7 @@ config IOMMU_DEBUGFS
choice
prompt "IOMMU dma mode"
depends on IOMMU_API
+ default IOMMU_DMA_MODE_PASSTHROUGH if (PPC_POWERNV && PCI)
default IOMMU_DMA_MODE_LAZY if S390_IOMMU
default IOMMU_DMA_MODE_STRICT
help
--
1.8.3

\
 
 \ /
  Last update: 2019-04-07 14:49    [W:0.114 / U:0.532 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site