[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH v4 02/17] xen/arm: implement helpers to get and update NUMA status
From: Wei Chen <wei.chen@xxxxxxx> NUMA has one global and one implementation specific switches. For ACPI NUMA implementation, Xen has acpi_numa, so we introduce device_tree_numa for device tree NUMA implementation. And use enumerations to indicate init, off and on status. arch_numa_disabled will get device_tree_numa status, but for arch_numa_setup we have not provided boot arguments to setup device_tree_numa. So we just return -EINVAL in this patch. Signed-off-by: Wei Chen <wei.chen@xxxxxxx> Signed-off-by: Henry Wang <Henry.Wang@xxxxxxx> --- v3 -> v4: 1. No change. v2 -> v3: 1. Rename the first entry of enum dt_numa_status as DT_NUMA_DEFAULT. 2. Make enum dt_numa_status device_tree_numa as __ro_after_init and assign it explicitly to DT_NUMA_DEFAULT. 3. Update the year in copyright to 2023. 4. Don't move the x86 numa_disabled() and make Arm's numa_disabled() a static inline function for !CONFIG_NUMA. v1 -> v2: 1. Use arch_numa_disabled to replace numa_enable_with_firmware. 2. Introduce enumerations for device tree numa status. 3. Use common numa_disabled, drop Arm version numa_disabled. 4. Introduce arch_numa_setup for Arm. 5. Rename bad_srat to numa_bad. 6. Add numa_enable_with_firmware helper. 7. Add numa_disabled helper. 8. Refine commit message. --- xen/arch/arm/include/asm/numa.h | 17 +++++++++++ xen/arch/arm/numa.c | 50 +++++++++++++++++++++++++++++++++ 2 files changed, 67 insertions(+) create mode 100644 xen/arch/arm/numa.c diff --git a/xen/arch/arm/include/asm/numa.h b/xen/arch/arm/include/asm/numa.h index 7d6ae36a19..83f60ad05b 100644 --- a/xen/arch/arm/include/asm/numa.h +++ b/xen/arch/arm/include/asm/numa.h @@ -22,6 +22,8 @@ typedef u8 nodeid_t; */ #define NR_NODE_MEMBLKS NR_MEM_BANKS +extern bool numa_disabled(void); + #else /* Fake one node for now. See also node_online_map. */ @@ -39,6 +41,21 @@ extern mfn_t first_valid_mfn; #define node_start_pfn(nid) (mfn_x(first_valid_mfn)) #define __node_distance(a, b) (20) +static inline bool numa_disabled(void) +{ + return true; +} + +static inline bool arch_numa_unavailable(void) +{ + return true; +} + +static inline bool arch_numa_broken(void) +{ + return true; +} + #endif #define arch_want_default_dmazone() (false) diff --git a/xen/arch/arm/numa.c b/xen/arch/arm/numa.c new file mode 100644 index 0000000000..eb5d0632cb --- /dev/null +++ b/xen/arch/arm/numa.c @@ -0,0 +1,50 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Arm Architecture support layer for NUMA. + * + * Copyright (C) 2023 Arm Ltd + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + * + */ +#include <xen/init.h> +#include <xen/numa.h> + +enum dt_numa_status { + DT_NUMA_DEFAULT, + DT_NUMA_ON, + DT_NUMA_OFF, +}; + +static enum dt_numa_status __ro_after_init device_tree_numa = DT_NUMA_DEFAULT; + +void __init numa_fw_bad(void) +{ + printk(KERN_ERR "NUMA: device tree numa info table not used.\n"); + device_tree_numa = DT_NUMA_OFF; +} + +bool __init arch_numa_unavailable(void) +{ + return device_tree_numa != DT_NUMA_ON; +} + +bool arch_numa_disabled(void) +{ + return device_tree_numa == DT_NUMA_OFF; +} + +int __init arch_numa_setup(const char *opt) +{ + return -EINVAL; +} -- 2.25.1
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