All of lore.kernel.org
 help / color / mirror / Atom feed
From: Lu Baolu <baolu.lu@linux.intel.com>
To: Joerg Roedel <joro@8bytes.org>
Cc: iommu@lists.linux-foundation.org
Subject: [PATCH 5/5] iommu/vt-d: Unnecessary to handle default identity domain
Date: Wed, 15 Jan 2020 11:03:59 +0800	[thread overview]
Message-ID: <20200115030359.13471-6-baolu.lu@linux.intel.com> (raw)
In-Reply-To: <20200115030359.13471-1-baolu.lu@linux.intel.com>

The iommu default domain framework has been designed to take
care of setting identity default domain type. It's unnecessary
to handle this again in the VT-d driver. Hence, remove it.

Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
---
 drivers/iommu/intel-iommu.c | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 3446da5a2186..f1f812cb7b9d 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -387,7 +387,6 @@ static int intel_iommu_superpage = 1;
 static int iommu_identity_mapping;
 static int intel_no_bounce;
 
-#define IDENTMAP_ALL		1
 #define IDENTMAP_GFX		2
 #define IDENTMAP_AZALIA		4
 
@@ -3079,8 +3078,7 @@ static int device_def_domain_type(struct device *dev)
 			return IOMMU_DOMAIN_DMA;
 	}
 
-	return (iommu_identity_mapping & IDENTMAP_ALL) ?
-			IOMMU_DOMAIN_IDENTITY : 0;
+	return 0;
 }
 
 static void intel_iommu_init_qi(struct intel_iommu *iommu)
@@ -3424,9 +3422,6 @@ static int __init init_dmars(void)
 		iommu->flush.flush_iotlb(iommu, 0, 0, 0, DMA_TLB_GLOBAL_FLUSH);
 	}
 
-	if (iommu_default_passthrough())
-		iommu_identity_mapping |= IDENTMAP_ALL;
-
 #ifdef CONFIG_INTEL_IOMMU_BROKEN_GFX_WA
 	dmar_map_gfx = 0;
 #endif
@@ -5038,7 +5033,7 @@ static int __init platform_optin_force_iommu(void)
 	 * map for all devices except those marked as being untrusted.
 	 */
 	if (dmar_disabled)
-		iommu_identity_mapping |= IDENTMAP_ALL;
+		iommu_set_default_passthrough(false);
 
 	dmar_disabled = 0;
 	no_iommu = 0;
-- 
2.17.1

_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu

  parent reply	other threads:[~2020-01-15  3:05 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-15  3:03 [PULL REQUEST] iommu/vt-d: patches for v5.6 - 2nd wave Lu Baolu
2020-01-15  3:03 ` [PATCH 1/5] iommu/vt-d: Don't reject Host Bridge due to scope mismatch Lu Baolu
2020-01-15  3:03 ` [PATCH 2/5] iommu/vt-d: Mark firmware tainted if RMRR fails sanity check Lu Baolu
2020-01-15  3:03 ` [PATCH 3/5] iommu/vt-d: Add RMRR base and end addresses " Lu Baolu
2020-01-15  3:03 ` [PATCH 4/5] iommu/vt-d: Allow devices with RMRRs to use identity domain Lu Baolu
2020-01-15  3:03 ` Lu Baolu [this message]
2020-01-17  9:58 ` [PULL REQUEST] iommu/vt-d: patches for v5.6 - 2nd wave Joerg Roedel

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20200115030359.13471-6-baolu.lu@linux.intel.com \
    --to=baolu.lu@linux.intel.com \
    --cc=iommu@lists.linux-foundation.org \
    --cc=joro@8bytes.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.