From: Zhen Lei <thunder.leizhen@huawei.com>
To: Jean-Philippe Brucker <jean-philippe.brucker@arm.com>,
John Garry <john.garry@huawei.com>,
Robin Murphy <robin.murphy@arm.com>,
Will Deacon <will.deacon@arm.com>, Joerg Roedel <joro@8bytes.org>,
Jonathan Corbet <corbet@lwn.net>,
linux-doc <linux-doc@vger.kernel.org>,
Sebastian Ott <sebott@linux.ibm.com>,
Gerald Schaefer <gerald.schaefer@de.ibm.com>,
"Martin Schwidefsky" <schwidefsky@de.ibm.com>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
"Michael Ellerman" <mpe@ellerman.id.au>,
Tony Luck <tony.luck@intel.com>,
Fenghua Yu <fenghua.yu@intel.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
"H . Peter Anvin" <hpa@zytor.com>,
David Woodhouse <dwmw2@infradead.org>,
iommu <iommu@lists.linux-foundation.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
linux-s390 <linux-s390@vger.kernel.org>,
linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
x86 <x86@kernel.org>, linux-ia64 <linux-ia64@vger.kernel.org>
Cc: Hanjun Guo <guohanjun@huawei.com>, Zhen Lei <thunder.leizhen@huawei.com>
Subject: [PATCH v8 5/7] iommu/vt-d: add support for IOMMU default DMA mode build options
Date: Thu, 30 May 2019 11:48:29 +0800 [thread overview]
Message-ID: <20190530034831.4184-6-thunder.leizhen@huawei.com> (raw)
In-Reply-To: <20190530034831.4184-1-thunder.leizhen@huawei.com>
The default DMA mode of INTEL IOMMU is LAZY, this patch make it can be
set to STRICT at build time. It can be overridden by boot option.
There is no functional change.
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
---
drivers/iommu/Kconfig | 2 +-
drivers/iommu/intel-iommu.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig
index b5af859956c4fda..af580274b7c5270 100644
--- a/drivers/iommu/Kconfig
+++ b/drivers/iommu/Kconfig
@@ -79,7 +79,7 @@ choice
prompt "IOMMU default DMA mode"
depends on IOMMU_API
default IOMMU_DEFAULT_PASSTHROUGH if (PPC_POWERNV && PCI)
- default IOMMU_DEFAULT_LAZY if S390_IOMMU
+ default IOMMU_DEFAULT_LAZY if (INTEL_IOMMU || S390_IOMMU)
default IOMMU_DEFAULT_STRICT
help
This option allows IOMMU DMA mode to be chose at build time, to
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index a209199f3af6460..50d74ea0acdbdca 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -362,7 +362,7 @@ static int domain_detach_iommu(struct dmar_domain *domain,
static int dmar_map_gfx = 1;
static int dmar_forcedac;
-static int intel_iommu_strict;
+static int intel_iommu_strict = IS_ENABLED(CONFIG_IOMMU_DEFAULT_STRICT);
static int intel_iommu_superpage = 1;
static int intel_iommu_sm;
static int iommu_identity_mapping;
--
1.8.3
next prev parent reply other threads:[~2019-05-30 4:15 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-30 3:48 [PATCH v8 0/7] iommu: enhance IOMMU default DMA mode build options Zhen Lei
2019-05-30 3:48 ` [PATCH v8 1/7] " Zhen Lei
2019-05-30 12:20 ` John Garry
2019-05-31 10:03 ` Leizhen (ThunderTown)
2019-05-31 10:42 ` John Garry
2019-06-13 8:30 ` Leizhen (ThunderTown)
2019-05-30 3:48 ` [PATCH v8 2/7] x86/dma: use IS_ENABLED() to simplify the code Zhen Lei
2019-06-12 5:16 ` Borislav Petkov
2019-06-12 6:26 ` Leizhen (ThunderTown)
2019-05-30 3:48 ` [PATCH v8 3/7] s390/pci: add support for IOMMU default DMA mode build options Zhen Lei
2019-06-03 11:51 ` Sebastian Ott
2019-05-30 3:48 ` [PATCH v8 4/7] powernv/iommu: " Zhen Lei
2019-05-30 3:48 ` Zhen Lei [this message]
2019-05-30 3:48 ` [PATCH v8 6/7] iommu/amd: " Zhen Lei
2019-05-30 3:48 ` [PATCH v8 7/7] ia64: hide build option IOMMU_DEFAULT_PASSTHROUGH Zhen Lei
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