This bug was fixed in the package linux-aws - 4.15.0-1087.92
---------------
linux-aws (4.15.0-1087.92) bionic; urgency=medium
* bionic/linux-aws: 4.15.0-1087.92 -proposed tracker (LP: #1900674)
* CVE-2020-12351 // CVE-2020-12352 // CVE-2020-24490
- [Config] aws: Disable BlueZ highspeed support
* EFA: add support for 0xefa1 devices (LP: #1896791)
- RDMA/efa: Expose maximum TX doorbell batch
- RDMA/efa: Expose minimum SQ size
- RDMA/efa: User/kernel compatibility handshake mechanism
- RDMA/efa: Add EFA 0xefa1 PCI ID
* aws: enable PCI write-combine for arm64 (LP: #1893817)
- SAUCE: arm64: Enable PCI write-combine resources under sysfs
[ Ubuntu: 4.15.0-122.124 ]
* bionic/linux: 4.15.0-122.124 -proposed tracker (LP: #1899941)
* CVE-2020-12351 // CVE-2020-12352 // CVE-2020-24490
- Bluetooth: Disable High Speed by default
- Bluetooth: MGMT: Fix not checking if BT_HS is enabled
- [Config] Disable BlueZ highspeed support
* CVE-2020-12351
- Bluetooth: L2CAP: Fix calling sk_filter on non-socket based channel
* CVE-2020-12352
- Bluetooth: A2MP: Fix not initializing all members
-- Stefan Bader <stefan.ba...@canonical.com> Tue, 20 Oct 2020 12:01:06
+0200
** Changed in: linux-aws (Ubuntu Bionic)
Status: Fix Committed => Fix Released
** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2020-12351
** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2020-12352
** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2020-24490
** Changed in: linux-aws (Ubuntu Focal)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1893817
Title:
aws: enable PCI write-combine for arm64
Status in linux-aws package in Ubuntu:
Fix Released
Status in linux-aws source package in Bionic:
Fix Released
Status in linux-aws source package in Focal:
Fix Released
Status in linux-aws source package in Groovy:
Fix Released
Bug description:
To improve PCI performance on certain arm64 AWS instance types, enable
arch_can_pci_mmap_wc() via the patch:
From: Clint Sbisa <csb...@amazon.com>
Subject: [PATCH] arm64: Enable PCI write-combine resources under sysfs
https://lore.kernel.org/linux-
pci/20200831151827.pumm2p54fyj7f...@amazon.com/
--------------
[Impact]
* AWS requires PCI-write-combine be enabled for arm64 via this one-
line patch, to effect a significant performance improvement on certain
AWS arm64 instance types.
* After considerable discussion, upstream indicates that this patch
will be accepted into mainline[0] once additional documentation
details get added to the commit description.
* Applying this patch to linux-aws affects only AWS arm64 instance
types.
[Test Case]
* Has been performance-tested by AWS; smoke-tested by me.
[Regression Potential]
* Low.
[0] https://lore.kernel.org/linux-
pci/20200917140116.ga4...@e121166-lin.cambridge.arm.com/
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