build: rebase and refactor kernel patches
This commit is contained in:
Fabian Grünbichler
parent
754ba827c1
commit
b9e76370ab
7 changed files with 97 additions and 44 deletions
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@ -0,0 +1,46 @@
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From 3e7aff6b22287eb04b8b5c4966b886b0ac1e8b06 Mon Sep 17 00:00:00 2001
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From: Ben Hutchings <ben@decadent.org.uk>
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Date: Tue, 12 May 2015 19:29:22 +0100
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Subject: [PATCH 1/4] Make mkcompile_h accept an alternate timestamp string
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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We want to include the Debian version in the utsname::version string
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instead of a full timestamp string. However, we still need to provide
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a standard timestamp string for gen_initramfs_list.sh to make the
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kernel image reproducible.
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Make mkcompile_h use $KBUILD_BUILD_VERSION_TIMESTAMP in preference to
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$KBUILD_BUILD_TIMESTAMP.
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Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
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---
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scripts/mkcompile_h | 10 +++++++---
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1 file changed, 7 insertions(+), 3 deletions(-)
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diff --git a/scripts/mkcompile_h b/scripts/mkcompile_h
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index fd8fdb91581d..1e35ac9fc810 100755
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--- a/scripts/mkcompile_h
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+++ b/scripts/mkcompile_h
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@@ -37,10 +37,14 @@ else
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VERSION=$KBUILD_BUILD_VERSION
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fi
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-if [ -z "$KBUILD_BUILD_TIMESTAMP" ]; then
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- TIMESTAMP=`date`
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+if [ -z "$KBUILD_BUILD_VERSION_TIMESTAMP" ]; then
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+ if [ -z "$KBUILD_BUILD_TIMESTAMP" ]; then
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+ TIMESTAMP=`date`
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+ else
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+ TIMESTAMP=$KBUILD_BUILD_TIMESTAMP
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+ fi
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else
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- TIMESTAMP=$KBUILD_BUILD_TIMESTAMP
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+ TIMESTAMP=$KBUILD_BUILD_VERSION_TIMESTAMP
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fi
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if test -z "$KBUILD_BUILD_USER"; then
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LINUX_COMPILE_BY=$(whoami | sed 's/\\/\\\\/')
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--
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2.11.0
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@ -0,0 +1,38 @@
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From 400ed0a6a0992f685b547e12f0fd5d35176e1275 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Fabian=20Gr=C3=BCnbichler?= <f.gruenbichler@proxmox.com>
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Date: Thu, 14 Sep 2017 11:02:18 +0200
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Subject: [PATCH 2/4] bridge: keep MAC of first assigned port
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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original commit message:
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Default bridge changes MAC dynamically using smallest MAC of all
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connected ports (for no real reason). To avoid problems with ARP
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we simply use the MAC of the first connected port.
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Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
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---
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net/bridge/br_stp_if.c | 5 +----
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1 file changed, 1 insertion(+), 4 deletions(-)
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diff --git a/net/bridge/br_stp_if.c b/net/bridge/br_stp_if.c
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index 89110319ef0f..5e73fff65f47 100644
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--- a/net/bridge/br_stp_if.c
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+++ b/net/bridge/br_stp_if.c
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@@ -259,10 +259,7 @@ bool br_stp_recalculate_bridge_id(struct net_bridge *br)
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return false;
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list_for_each_entry(p, &br->port_list, list) {
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- if (addr == br_mac_zero ||
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- memcmp(p->dev->dev_addr, addr, ETH_ALEN) < 0)
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- addr = p->dev->dev_addr;
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-
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+ addr = p->dev->dev_addr;
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}
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if (ether_addr_equal(br->bridge_id.addr, addr))
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--
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2.11.0
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@ -0,0 +1,199 @@
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From e39d70502f7a981f821243160501303b7ee26d52 Mon Sep 17 00:00:00 2001
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From: Mark Weiman <mark.weiman@markzz.com>
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Date: Sat, 29 Jul 2017 09:15:32 -0400
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Subject: [PATCH 3/4] pci: Enable overrides for missing ACS capabilities
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(4.12+)
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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This an updated version of Alex Williamson's patch from:
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https://lkml.org/lkml/2013/5/30/513
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Original commit message follows:
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PCIe ACS (Access Control Services) is the PCIe 2.0+ feature that
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allows us to control whether transactions are allowed to be redirected
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in various subnodes of a PCIe topology. For instance, if two
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endpoints are below a root port or downsteam switch port, the
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downstream port may optionally redirect transactions between the
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devices, bypassing upstream devices. The same can happen internally
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on multifunction devices. The transaction may never be visible to the
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upstream devices.
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One upstream device that we particularly care about is the IOMMU. If
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a redirection occurs in the topology below the IOMMU, then the IOMMU
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cannot provide isolation between devices. This is why the PCIe spec
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encourages topologies to include ACS support. Without it, we have to
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assume peer-to-peer DMA within a hierarchy can bypass IOMMU isolation.
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Unfortunately, far too many topologies do not support ACS to make this
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a steadfast requirement. Even the latest chipsets from Intel are only
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sporadically supporting ACS. We have trouble getting interconnect
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vendors to include the PCIe spec required PCIe capability, let alone
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suggested features.
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Therefore, we need to add some flexibility. The pcie_acs_override=
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boot option lets users opt-in specific devices or sets of devices to
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assume ACS support. The "downstream" option assumes full ACS support
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on root ports and downstream switch ports. The "multifunction"
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option assumes the subset of ACS features available on multifunction
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endpoints and upstream switch ports are supported. The "id:nnnn:nnnn"
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option enables ACS support on devices matching the provided vendor
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and device IDs, allowing more strategic ACS overrides. These options
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may be combined in any order. A maximum of 16 id specific overrides
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are available. It's suggested to use the most limited set of options
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necessary to avoid completely disabling ACS across the topology.
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Note to hardware vendors, we have facilities to permanently quirk
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specific devices which enforce isolation but not provide an ACS
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capability. Please contact me to have your devices added and save
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your customers the hassle of this boot option.
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Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
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---
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Documentation/admin-guide/kernel-parameters.txt | 9 +++
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drivers/pci/quirks.c | 102 ++++++++++++++++++++++++
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2 files changed, 111 insertions(+)
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diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
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index f8ce2089146c..d4ace16bd59a 100644
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--- a/Documentation/admin-guide/kernel-parameters.txt
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+++ b/Documentation/admin-guide/kernel-parameters.txt
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@@ -2918,6 +2918,15 @@
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nomsi [MSI] If the PCI_MSI kernel config parameter is
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enabled, this kernel boot option can be used to
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disable the use of MSI interrupts system-wide.
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+ pci_acs_override =
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+ [PCIE] Override missing PCIe ACS support for:
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+ downstream
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+ All downstream ports - full ACS capabilities
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+ multfunction
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+ All multifunction devices - multifunction ACS subset
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+ id:nnnn:nnnn
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+ Specfic device - full ACS capabilities
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+ Specified as vid:did (vendor/device ID) in hex
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noioapicquirk [APIC] Disable all boot interrupt quirks.
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Safety option to keep boot IRQs enabled. This
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should never be necessary.
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diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
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index b7832fd4dbf4..f128ca4aea2b 100644
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--- a/drivers/pci/quirks.c
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+++ b/drivers/pci/quirks.c
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@@ -3687,6 +3687,107 @@ static int __init pci_apply_final_quirks(void)
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fs_initcall_sync(pci_apply_final_quirks);
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+static bool acs_on_downstream;
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+static bool acs_on_multifunction;
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+
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+#define NUM_ACS_IDS 16
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+struct acs_on_id {
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+ unsigned short vendor;
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+ unsigned short device;
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+};
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+static struct acs_on_id acs_on_ids[NUM_ACS_IDS];
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+static u8 max_acs_id;
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+
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+static __init int pcie_acs_override_setup(char *p)
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+{
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+ if (!p)
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+ return -EINVAL;
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+
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+ while (*p) {
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+ if (!strncmp(p, "downstream", 10))
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+ acs_on_downstream = true;
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+ if (!strncmp(p, "multifunction", 13))
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+ acs_on_multifunction = true;
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+ if (!strncmp(p, "id:", 3)) {
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+ char opt[5];
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+ int ret;
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+ long val;
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+
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+ if (max_acs_id >= NUM_ACS_IDS - 1) {
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+ pr_warn("Out of PCIe ACS override slots (%d)\n",
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+ NUM_ACS_IDS);
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+ goto next;
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+ }
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+
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+ p += 3;
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+ snprintf(opt, 5, "%s", p);
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+ ret = kstrtol(opt, 16, &val);
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+ if (ret) {
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+ pr_warn("PCIe ACS ID parse error %d\n", ret);
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+ goto next;
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+ }
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+ acs_on_ids[max_acs_id].vendor = val;
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+
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+ p += strcspn(p, ":");
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+ if (*p != ':') {
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+ pr_warn("PCIe ACS invalid ID\n");
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+ goto next;
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+ }
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+
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+ p++;
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+ snprintf(opt, 5, "%s", p);
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+ ret = kstrtol(opt, 16, &val);
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+ if (ret) {
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+ pr_warn("PCIe ACS ID parse error %d\n", ret);
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+ goto next;
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+ }
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+ acs_on_ids[max_acs_id].device = val;
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+ max_acs_id++;
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+ }
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+next:
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+ p += strcspn(p, ",");
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+ if (*p == ',')
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+ p++;
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+ }
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+
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+ if (acs_on_downstream || acs_on_multifunction || max_acs_id)
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+ pr_warn("Warning: PCIe ACS overrides enabled; This may allow non-IOMMU protected peer-to-peer DMA\n");
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+
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+ return 0;
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+}
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+early_param("pcie_acs_override", pcie_acs_override_setup);
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+
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+static int pcie_acs_overrides(struct pci_dev *dev, u16 acs_flags)
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+{
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+ int i;
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+
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+ /* Never override ACS for legacy devices or devices with ACS caps */
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+ if (!pci_is_pcie(dev) ||
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+ pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ACS))
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+ return -ENOTTY;
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+
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+ for (i = 0; i < max_acs_id; i++)
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+ if (acs_on_ids[i].vendor == dev->vendor &&
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+ acs_on_ids[i].device == dev->device)
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+ return 1;
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+
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+ switch (pci_pcie_type(dev)) {
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+ case PCI_EXP_TYPE_DOWNSTREAM:
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+ case PCI_EXP_TYPE_ROOT_PORT:
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+ if (acs_on_downstream)
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+ return 1;
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+ break;
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+ case PCI_EXP_TYPE_ENDPOINT:
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+ case PCI_EXP_TYPE_UPSTREAM:
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+ case PCI_EXP_TYPE_LEG_END:
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+ case PCI_EXP_TYPE_RC_END:
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+ if (acs_on_multifunction && dev->multifunction)
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+ return 1;
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+ }
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+
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+ return -ENOTTY;
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+}
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+
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/*
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* Following are device-specific reset methods which can be used to
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* reset a single function if other methods (e.g. FLR, PM D0->D3) are
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@@ -4490,6 +4591,7 @@ static const struct pci_dev_acs_enabled {
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{ 0x10df, 0x720, pci_quirk_mf_endpoint_acs }, /* Emulex Skyhawk-R */
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/* Cavium ThunderX */
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{ PCI_VENDOR_ID_CAVIUM, PCI_ANY_ID, pci_quirk_cavium_acs },
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+ { PCI_ANY_ID, PCI_ANY_ID, pcie_acs_overrides },
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{ 0 }
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};
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--
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2.11.0
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@ -0,0 +1,29 @@
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From c60cb6add5a95c3e7bfb7b0d92c01ce66bfec8d6 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Fabian=20Gr=C3=BCnbichler?= <f.gruenbichler@proxmox.com>
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Date: Thu, 14 Sep 2017 11:09:58 +0200
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Subject: [PATCH 4/4] kvm: disable default dynamic halt polling growth
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
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---
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virt/kvm/kvm_main.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
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index 4d81f6ded88e..bfa9c4d34102 100644
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--- a/virt/kvm/kvm_main.c
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+++ b/virt/kvm/kvm_main.c
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@@ -77,7 +77,7 @@ module_param(halt_poll_ns, uint, 0644);
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EXPORT_SYMBOL_GPL(halt_poll_ns);
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/* Default doubles per-vcpu halt_poll_ns. */
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-unsigned int halt_poll_ns_grow = 2;
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+unsigned int halt_poll_ns_grow = 0;
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module_param(halt_poll_ns_grow, uint, 0644);
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EXPORT_SYMBOL_GPL(halt_poll_ns_grow);
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--
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2.11.0
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