mirror of
https://git.openwrt.org/openwrt/openwrt.git
synced 2024-11-22 04:56:15 +00:00
538a1d740c
The patches were generated from the RPi repo with the following command: git format-patch v6.6.58..rpi-6.6.y Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
183 lines
4.6 KiB
Diff
183 lines
4.6 KiB
Diff
From b1a0f9c705912ec0434645f2d2bcf914c635564d Mon Sep 17 00:00:00 2001
|
|
From: =?UTF-8?q?Ma=C3=ADra=20Canal?= <mcanal@igalia.com>
|
|
Date: Fri, 17 May 2024 11:40:23 -0300
|
|
Subject: [PATCH 1338/1350] numa: Add simple generic NUMA emulation
|
|
MIME-Version: 1.0
|
|
Content-Type: text/plain; charset=UTF-8
|
|
Content-Transfer-Encoding: 8bit
|
|
|
|
Add some common code for splitting the memory into N emulated NUMA memory
|
|
nodes.
|
|
|
|
Individual architecture can then enable selecting this option and use the
|
|
existing numa=fake=<N> kernel argument to enable it.
|
|
|
|
Memory is always split into equally sized chunks.
|
|
|
|
Signed-off-by: Maíra Canal <mcanal@igalia.com>
|
|
Co-developed-by: Tvrtko Ursulin <tvrtko.ursulin@igalia.com>
|
|
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@igalia.com>
|
|
Cc: Catalin Marinas <catalin.marinas@arm.com>
|
|
Cc: Will Deacon <will@kernel.org>
|
|
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
Cc: “Rafael J. Wysocki" <rafael@kernel.org>
|
|
---
|
|
drivers/base/Kconfig | 7 ++++
|
|
drivers/base/Makefile | 1 +
|
|
drivers/base/arch_numa.c | 6 ++++
|
|
drivers/base/numa_emulation.c | 67 +++++++++++++++++++++++++++++++++++
|
|
drivers/base/numa_emulation.h | 21 +++++++++++
|
|
5 files changed, 102 insertions(+)
|
|
create mode 100644 drivers/base/numa_emulation.c
|
|
create mode 100644 drivers/base/numa_emulation.h
|
|
|
|
--- a/drivers/base/Kconfig
|
|
+++ b/drivers/base/Kconfig
|
|
@@ -230,6 +230,13 @@ config GENERIC_ARCH_NUMA
|
|
Enable support for generic NUMA implementation. Currently, RISC-V
|
|
and ARM64 use it.
|
|
|
|
+config GENERIC_ARCH_NUMA_EMULATION
|
|
+ bool
|
|
+ depends on GENERIC_ARCH_NUMA
|
|
+ help
|
|
+ Enable NUMA emulation. Note that NUMA emulation will only be used if
|
|
+ the machine has no NUMA node.
|
|
+
|
|
config FW_DEVLINK_SYNC_STATE_TIMEOUT
|
|
bool "sync_state() behavior defaults to timeout instead of strict"
|
|
help
|
|
--- a/drivers/base/Makefile
|
|
+++ b/drivers/base/Makefile
|
|
@@ -25,6 +25,7 @@ obj-$(CONFIG_DEV_COREDUMP) += devcoredum
|
|
obj-$(CONFIG_GENERIC_MSI_IRQ) += platform-msi.o
|
|
obj-$(CONFIG_GENERIC_ARCH_TOPOLOGY) += arch_topology.o
|
|
obj-$(CONFIG_GENERIC_ARCH_NUMA) += arch_numa.o
|
|
+obj-$(CONFIG_GENERIC_ARCH_NUMA_EMULATION) += numa_emulation.o
|
|
obj-$(CONFIG_ACPI) += physical_location.o
|
|
|
|
obj-y += test/
|
|
--- a/drivers/base/arch_numa.c
|
|
+++ b/drivers/base/arch_numa.c
|
|
@@ -15,6 +15,8 @@
|
|
|
|
#include <asm/sections.h>
|
|
|
|
+#include "numa_emulation.h"
|
|
+
|
|
struct pglist_data *node_data[MAX_NUMNODES] __read_mostly;
|
|
EXPORT_SYMBOL(node_data);
|
|
nodemask_t numa_nodes_parsed __initdata;
|
|
@@ -30,6 +32,8 @@ static __init int numa_parse_early_param
|
|
return -EINVAL;
|
|
if (str_has_prefix(opt, "off"))
|
|
numa_off = true;
|
|
+ if (str_has_prefix(opt, "fake="))
|
|
+ return numa_emu_cmdline(opt + 5);
|
|
|
|
return 0;
|
|
}
|
|
@@ -471,6 +475,8 @@ void __init arch_numa_init(void)
|
|
return;
|
|
if (acpi_disabled && !numa_init(of_numa_init))
|
|
return;
|
|
+ if (!numa_init(numa_emu_init))
|
|
+ return;
|
|
}
|
|
|
|
numa_init(dummy_numa_init);
|
|
--- /dev/null
|
|
+++ b/drivers/base/numa_emulation.c
|
|
@@ -0,0 +1,67 @@
|
|
+// SPDX-License-Identifier: GPL-2.0-only
|
|
+/*
|
|
+ * Simple NUMA emulation.
|
|
+ *
|
|
+ * Copyright © 2024 Raspberry Pi Ltd
|
|
+ *
|
|
+ * Author: Maíra Canal <mcanal@igalia.com>
|
|
+ * Author: Tvrtko Ursulin <tursulin@igalia.com>
|
|
+ */
|
|
+#include <linux/memblock.h>
|
|
+
|
|
+#include "numa_emulation.h"
|
|
+
|
|
+static unsigned int emu_nodes;
|
|
+
|
|
+int __init numa_emu_cmdline(char *str)
|
|
+{
|
|
+ int ret;
|
|
+
|
|
+ ret = kstrtouint(str, 10, &emu_nodes);
|
|
+ if (ret)
|
|
+ return ret;
|
|
+
|
|
+ if (emu_nodes > MAX_NUMNODES) {
|
|
+ pr_notice("numa=fake=%u too large, reducing to %u\n",
|
|
+ emu_nodes, MAX_NUMNODES);
|
|
+ emu_nodes = MAX_NUMNODES;
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+int __init numa_emu_init(void)
|
|
+{
|
|
+ phys_addr_t start, end;
|
|
+ unsigned long size;
|
|
+ unsigned int i;
|
|
+ int ret;
|
|
+
|
|
+ if (!emu_nodes)
|
|
+ return -EINVAL;
|
|
+
|
|
+ start = memblock_start_of_DRAM();
|
|
+ end = memblock_end_of_DRAM() - 1;
|
|
+
|
|
+ size = DIV_ROUND_DOWN_ULL(end - start + 1, emu_nodes);
|
|
+ size = PAGE_ALIGN_DOWN(size);
|
|
+
|
|
+ for (i = 0; i < emu_nodes; i++) {
|
|
+ u64 s, e;
|
|
+
|
|
+ s = start + i * size;
|
|
+ e = s + size - 1;
|
|
+
|
|
+ if (i == (emu_nodes - 1) && e != end)
|
|
+ e = end;
|
|
+
|
|
+ pr_info("Faking a node at [mem %pap-%pap]\n", &s, &e);
|
|
+ ret = numa_add_memblk(i, s, e + 1);
|
|
+ if (ret) {
|
|
+ pr_err("Failed to add fake NUMA node %d!\n", i);
|
|
+ break;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ return ret;
|
|
+}
|
|
--- /dev/null
|
|
+++ b/drivers/base/numa_emulation.h
|
|
@@ -0,0 +1,21 @@
|
|
+/* SPDX-License-Identifier: GPL-2.0-only */
|
|
+/*
|
|
+ * NUMA emulation header
|
|
+ *
|
|
+ * Copyright © 2024 Raspberry Pi Ltd
|
|
+ */
|
|
+
|
|
+#ifdef CONFIG_GENERIC_ARCH_NUMA_EMULATION
|
|
+int numa_emu_cmdline(char *str);
|
|
+int __init numa_emu_init(void);
|
|
+#else
|
|
+static inline int numa_emu_cmdline(char *str)
|
|
+{
|
|
+ return -EINVAL;
|
|
+}
|
|
+
|
|
+static int __init numa_emu_init(void)
|
|
+{
|
|
+ return -EOPNOTSUPP;
|
|
+}
|
|
+#endif /* CONFIG_NUMA_EMU */
|