kernel 5.11.7

1 files changed, 0 insertions, 98 deletions

diff --git a/SOURCES/0001-iommu-arm-smmu-workaround-DMA-mode-issues.patch b/SOURCES/0001-iommu-arm-smmu-workaround-DMA-mode-issues.patch
deleted file mode 100644
index 743be19..0000000
--- a/SOURCES/0001-iommu-arm-smmu-workaround-DMA-mode-issues.patch
+++ /dev/null
@@ -1,98 +0,0 @@
-From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
-From: Laura Abbott <labbott@redhat.com>
-Date: Mon, 20 May 2019 22:21:02 -0400
-Subject: [PATCH] iommu/arm-smmu: workaround DMA mode issues
-
-Message-id: <20190520222102.19488-1-labbott@redhat.com>
-Patchwork-id: 259215
-O-Subject: [ARK INTERNAL PATCH] iommu/arm-smmu: workaround DMA mode issues
-Bugzilla:
-RH-Acked-by: Mark Langsdorf <mlangsdo@redhat.com>
-RH-Acked-by: Mark Salter <msalter@redhat.com>
-
-From: Mark Salter <msalter@redhat.com>
-
-Rebased for v5.2-rc1
-
-	Bugzilla: 1652259
-	Brew: https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=19244562
-	Upstream status: RHEL only.
-
-	rhel8 commit 65feb1ed0ec9a088a63a90d46c0f7563ac96ad0f
-	Author: Mark Salter <msalter@redhat.com>
-	Date:   Wed Nov 21 17:15:59 2018 +0100
-
-	    [iommu] iommu/arm-smmu: workaround DMA mode issues
-
-	    Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1624077
-	    Brew: https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=18112820
-	    Testing: Verified iommu.passthrough=1 no longer needed on gigabyte platforms.
-	    Upstream Status: RHEL-only
-
-	    In RHEL_ALT 7.5 we carried a RHEL-only patch which forced the arm smmuv2
-	    into bypass mode due to performance issues on CN88xx. This was intended
-	    to be a temporary hack until the issues were resolved. Another vendor
-	    had issues with the iommu in bypass mode so we reverted the RHEL-only
-	    patch so that iommu is in DMA mode by default (upstream default).
-
-	    It turns on that there are remaining SMMU DMA mode issues on Gigabyte
-	    platformws with CN88xx cpus. The problem manifests itself by pcie
-	    card drivers failing to initialize the cards when SMMU is in DMA mode.
-	    The root cause has not been determined yet, but looks likely to be
-	    a hw or firmware issue. This patch forces bypass mode for Gigabyte
-	    platforms. CN88xx isn't officially supported in RHEL but we have a
-	    lot of them being used internally for testing, so I think we want
-	    this to support that use case in RHEL8.
-
-	    Signed-off-by: Mark Salter <msalter@redhat.com>
-	    Signed-off-by: Herton R. Krzesinski <herton@redhat.com>
-
-	Acked-by: Mark Salter <msalter@redhat.com>
-	Acked-by: Donald Dutile <ddutile@redhat.com>
-
-Upstream Status: RHEL only
-Signed-off-by: Laura Abbott <labbott@redhat.com>
----
- drivers/iommu/iommu.c | 22 ++++++++++++++++++++++
- 1 file changed, 22 insertions(+)
-
-diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
-index 609bd25bf154..c701912b13ab 100644
---- a/drivers/iommu/iommu.c
-+++ b/drivers/iommu/iommu.c
-@@ -7,6 +7,7 @@
- #define pr_fmt(fmt)    "iommu: " fmt
-
- #include <linux/device.h>
-+#include <linux/dmi.h>
- #include <linux/kernel.h>
- #include <linux/bug.h>
- #include <linux/types.h>
-@@ -2849,3 +2850,24 @@ int iommu_sva_get_pasid(struct iommu_sva *handle)
- 	return ops->sva_get_pasid(handle);
- }
- EXPORT_SYMBOL_GPL(iommu_sva_get_pasid);
-+
-+#ifdef CONFIG_ARM64
-+static int __init iommu_quirks(void)
-+{
-+	const char *vendor, *name;
-+
-+	vendor = dmi_get_system_info(DMI_SYS_VENDOR);
-+	name = dmi_get_system_info(DMI_PRODUCT_NAME);
-+
-+	if (vendor &&
-+	    (strncmp(vendor, "GIGABYTE", 8) == 0 && name &&
-+	     (strncmp(name, "R120", 4) == 0 ||
-+	      strncmp(name, "R270", 4) == 0))) {
-+		pr_warn("Gigabyte %s detected, force iommu passthrough mode", name);
-+		iommu_def_domain_type = IOMMU_DOMAIN_IDENTITY;
-+	}
-+
-+	return 0;
-+}
-+arch_initcall(iommu_quirks);
-+#endif
--- 
-2.28.0
-