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| author | Felix Fietkau <nbd@nbd.name> | 2023-07-24 13:17:44 +0200 |
|---|---|---|
| committer | Felix Fietkau <nbd@nbd.name> | 2023-07-24 20:19:11 +0200 |
| commit | e5dea9e37f1953d0cc4b846a530ff4247bf08ee0 (patch) | |
| tree | 294a8a2b23037bb83ff632b1090ec9d92ee718c5 | |
| parent | 476bf135fcec4c1ceb5114029e539a07131e970f (diff) | |
| download | upstream-e5dea9e37f1953d0cc4b846a530ff4247bf08ee0.tar.gz upstream-e5dea9e37f1953d0cc4b846a530ff4247bf08ee0.tar.bz2 upstream-e5dea9e37f1953d0cc4b846a530ff4247bf08ee0.zip | |
ramips: mt7621: disable highmem support and remove highmem offset patch
On MT7621 it was observed, that enabling highmem support causes a significant
performance drop, as documented in: https://github.com/openwrt/openwrt/issues/13151
By adjusting the highmem start offset, we avoid leaving any RAM unaddressable,
even on devices with 512 MB
Fixes: https://github.com/openwrt/openwrt/issues/13151
Signed-off-by: Felix Fietkau <nbd@nbd.name>
(cherry picked from commit cd2b74e01e8d5f5b80b82db1cb204c13ed99dd58)
| -rw-r--r-- | target/linux/ramips/mt7621/config-5.15 | 3 | ||||
| -rw-r--r-- | target/linux/ramips/patches-5.15/120-highmem-start-offset.patch | 19 |
2 files changed, 19 insertions, 3 deletions
diff --git a/target/linux/ramips/mt7621/config-5.15 b/target/linux/ramips/mt7621/config-5.15 index b366dac723..05e4c1ce87 100644 --- a/target/linux/ramips/mt7621/config-5.15 +++ b/target/linux/ramips/mt7621/config-5.15 @@ -7,7 +7,6 @@ CONFIG_ARCH_SUSPEND_POSSIBLE=y CONFIG_AT803X_PHY=y CONFIG_BLK_MQ_PCI=y CONFIG_BOARD_SCACHE=y -CONFIG_BOUNCE=y CONFIG_CEVT_R4K=y CONFIG_CLKSRC_MIPS_GIC=y CONFIG_CLK_MT7621=y @@ -91,7 +90,6 @@ CONFIG_HARDWARE_WATCHPOINTS=y CONFIG_HAS_DMA=y CONFIG_HAS_IOMEM=y CONFIG_HAS_IOPORT_MAP=y -CONFIG_HIGHMEM=y CONFIG_I2C=y CONFIG_I2C_ALGOBIT=y CONFIG_I2C_BOARDINFO=y @@ -106,7 +104,6 @@ CONFIG_IRQ_DOMAIN_HIERARCHY=y CONFIG_IRQ_FORCED_THREADING=y CONFIG_IRQ_MIPS_CPU=y CONFIG_IRQ_WORK=y -CONFIG_KMAP_LOCAL=y CONFIG_LED_TRIGGER_PHY=y CONFIG_LIBFDT=y CONFIG_LOCK_DEBUGGING_SUPPORT=y diff --git a/target/linux/ramips/patches-5.15/120-highmem-start-offset.patch b/target/linux/ramips/patches-5.15/120-highmem-start-offset.patch new file mode 100644 index 0000000000..629c7bfa5c --- /dev/null +++ b/target/linux/ramips/patches-5.15/120-highmem-start-offset.patch @@ -0,0 +1,19 @@ +From: Felix Fietkau <nbd@nbd.name> +Date: Mon Jul 24 13:29:13 CEST 2023 +Subject: [PATCH] mips: ralink: increase highmem start + +Increase highmem start address in order to support devices with 512 MB memory +and MT7621 SoC + +Signed-off-by: Felix Fietkau <nbd@nbd.name> +--- +--- a/arch/mips/include/asm/mach-ralink/spaces.h ++++ b/arch/mips/include/asm/mach-ralink/spaces.h +@@ -5,6 +5,7 @@ + #define PCI_IOBASE _AC(0xa0000000, UL) + #define PCI_IOSIZE SZ_16M + #define IO_SPACE_LIMIT (PCI_IOSIZE - 1) ++#define HIGHMEM_START _AC(0x24000000, UL) + + #include <asm/mach-generic/spaces.h> + #endif |