From: Rui Salvaterra <rsalvaterra@gmail.com>
Date: Mon, 3 Jan 2022 13:36:36 +0000 (+0000)
Subject: kernel: 5.10: allocate last level PTEs in high memory
X-Git-Tag: v22.03.0-rc1~265
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=72d2c54ccbfec20503b2ae9ff3ea66cfcf3c8703;p=openwrt%2Fopenwrt.git

kernel: 5.10: allocate last level PTEs in high memory

Enable support for allocating user space page table entries in high memory [1],
for the targets which support this feature. This saves precious low memory
(permanently mapped, the only type of memory directly accessible by the kernel).

[1] https://www.kernel.org/doc/html/latest/vm/highmem.html

Signed-off-by: Rui Salvaterra <rsalvaterra@gmail.com>
---

diff --git a/target/linux/bcm53xx/config-5.10 b/target/linux/bcm53xx/config-5.10
index 3dd0359113..6049641898 100644
--- a/target/linux/bcm53xx/config-5.10
+++ b/target/linux/bcm53xx/config-5.10
@@ -159,7 +159,7 @@ CONFIG_HAS_IOMEM=y
 CONFIG_HAS_IOPORT_MAP=y
 CONFIG_HAVE_SMP=y
 CONFIG_HIGHMEM=y
-# CONFIG_HIGHPTE is not set
+CONFIG_HIGHPTE=y
 CONFIG_HW_RANDOM=y
 CONFIG_HW_RANDOM_BCM2835=y
 CONFIG_HZ_FIXED=0
diff --git a/target/linux/ipq40xx/config-5.10 b/target/linux/ipq40xx/config-5.10
index 3ebc7b3e1e..403ed6e6e4 100644
--- a/target/linux/ipq40xx/config-5.10
+++ b/target/linux/ipq40xx/config-5.10
@@ -189,7 +189,7 @@ CONFIG_HAS_IOMEM=y
 CONFIG_HAS_IOPORT_MAP=y
 CONFIG_HAVE_SMP=y
 CONFIG_HIGHMEM=y
-# CONFIG_HIGHPTE is not set
+CONFIG_HIGHPTE=y
 CONFIG_HWSPINLOCK=y
 CONFIG_HWSPINLOCK_QCOM=y
 CONFIG_HW_RANDOM=y
diff --git a/target/linux/ipq806x/config-5.10 b/target/linux/ipq806x/config-5.10
index 827447d8eb..d22ac6cd04 100644
--- a/target/linux/ipq806x/config-5.10
+++ b/target/linux/ipq806x/config-5.10
@@ -176,7 +176,7 @@ CONFIG_HAS_IOMEM=y
 CONFIG_HAS_IOPORT_MAP=y
 CONFIG_HAVE_SMP=y
 CONFIG_HIGHMEM=y
-# CONFIG_HIGHPTE is not set
+CONFIG_HIGHPTE=y
 CONFIG_HWMON=y
 CONFIG_HWSPINLOCK=y
 CONFIG_HWSPINLOCK_QCOM=y
diff --git a/target/linux/mediatek/mt7623/config-5.10 b/target/linux/mediatek/mt7623/config-5.10
index 142ffd7998..3d017400a0 100644
--- a/target/linux/mediatek/mt7623/config-5.10
+++ b/target/linux/mediatek/mt7623/config-5.10
@@ -265,7 +265,7 @@ CONFIG_HAVE_SMP=y
 CONFIG_HDMI=y
 CONFIG_HID=y
 CONFIG_HIGHMEM=y
-# CONFIG_HIGHPTE is not set
+CONFIG_HIGHPTE=y
 CONFIG_HOTPLUG_CPU=y
 CONFIG_HW_CONSOLE=y
 CONFIG_HWMON=y
diff --git a/target/linux/mvebu/config-5.10 b/target/linux/mvebu/config-5.10
index ee9331252c..0bce22daee 100644
--- a/target/linux/mvebu/config-5.10
+++ b/target/linux/mvebu/config-5.10
@@ -198,7 +198,7 @@ CONFIG_HAS_IOMEM=y
 CONFIG_HAS_IOPORT_MAP=y
 CONFIG_HAVE_SMP=y
 CONFIG_HIGHMEM=y
-# CONFIG_HIGHPTE is not set
+CONFIG_HIGHPTE=y
 CONFIG_HOTPLUG_CPU=y
 CONFIG_HWBM=y
 CONFIG_HWMON=y
diff --git a/target/linux/x86/config-5.10 b/target/linux/x86/config-5.10
index 2d07f5a905..ec27bb7945 100644
--- a/target/linux/x86/config-5.10
+++ b/target/linux/x86/config-5.10
@@ -146,7 +146,7 @@ CONFIG_HID=y
 CONFIG_HIGHMEM=y
 CONFIG_HIGHMEM4G=y
 # CONFIG_HIGHMEM64G is not set
-# CONFIG_HIGHPTE is not set
+CONFIG_HIGHPTE=y
 CONFIG_HPET_EMULATE_RTC=y
 CONFIG_HPET_TIMER=y
 # CONFIG_HP_WATCHDOG is not set
diff --git a/target/linux/zynq/config-5.10 b/target/linux/zynq/config-5.10
index 35b7f03a9b..7e960d4ad0 100644
--- a/target/linux/zynq/config-5.10
+++ b/target/linux/zynq/config-5.10
@@ -225,7 +225,7 @@ CONFIG_HID=y
 CONFIG_HID_GENERIC=y
 CONFIG_HID_MICROSOFT=y
 CONFIG_HIGHMEM=y
-# CONFIG_HIGHPTE is not set
+CONFIG_HIGHPTE=y
 CONFIG_HOTPLUG_CPU=y
 CONFIG_HWMON=y
 CONFIG_HW_CONSOLE=y