Contributors: 32
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Heiko Carstens |
569 |
45.74% |
26 |
24.53% |
| Martin Schwidefsky |
162 |
13.02% |
9 |
8.49% |
| Halil Pasic |
119 |
9.57% |
1 |
0.94% |
| Linus Torvalds (pre-git) |
101 |
8.12% |
23 |
21.70% |
| Mike Rapoport |
72 |
5.79% |
7 |
6.60% |
| David Hildenbrand |
39 |
3.14% |
4 |
3.77% |
| Nico Boehr |
20 |
1.61% |
1 |
0.94% |
| Gerald Schaefer |
18 |
1.45% |
1 |
0.94% |
| Wei Yang |
14 |
1.13% |
1 |
0.94% |
| Tom Lendacky |
14 |
1.13% |
1 |
0.94% |
| Anshuman Khandual |
13 |
1.05% |
1 |
0.94% |
| Christoph Hellwig |
12 |
0.96% |
3 |
2.83% |
| Logan Gunthorpe |
11 |
0.88% |
2 |
1.89% |
| Vasily Gorbik |
10 |
0.80% |
2 |
1.89% |
| Wen Congyang |
9 |
0.72% |
1 |
0.94% |
| Juergen Gross |
8 |
0.64% |
2 |
1.89% |
| Sven Schnelle |
6 |
0.48% |
1 |
0.94% |
| Alexander Gordeev |
6 |
0.48% |
3 |
2.83% |
| Jiang Liu |
6 |
0.48% |
1 |
0.94% |
| Ard Biesheuvel |
5 |
0.40% |
1 |
0.94% |
| Linus Torvalds |
5 |
0.40% |
3 |
2.83% |
| Nicolas Saenz Julienne |
4 |
0.32% |
1 |
0.94% |
| Philipp Hachtmann |
3 |
0.24% |
1 |
0.94% |
| Pierre Morel |
3 |
0.24% |
1 |
0.94% |
| Avi Kivity |
3 |
0.24% |
1 |
0.94% |
| Laura Abbott |
3 |
0.24% |
1 |
0.94% |
| Dan J Williams |
2 |
0.16% |
1 |
0.94% |
| Michal Hocko |
2 |
0.16% |
2 |
1.89% |
| Gary Hade |
2 |
0.16% |
1 |
0.94% |
| Greg Kroah-Hartman |
1 |
0.08% |
1 |
0.94% |
| Joe Perches |
1 |
0.08% |
1 |
0.94% |
| Thiago Jung Bauermann |
1 |
0.08% |
1 |
0.94% |
| Total |
1244 |
|
106 |
|
// SPDX-License-Identifier: GPL-2.0
/*
* S390 version
* Copyright IBM Corp. 1999
* Author(s): Hartmut Penner (hp@de.ibm.com)
*
* Derived from "arch/i386/mm/init.c"
* Copyright (C) 1995 Linus Torvalds
*/
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/ptrace.h>
#include <linux/mman.h>
#include <linux/mm.h>
#include <linux/swap.h>
#include <linux/swiotlb.h>
#include <linux/smp.h>
#include <linux/init.h>
#include <linux/pagemap.h>
#include <linux/memblock.h>
#include <linux/memory.h>
#include <linux/pfn.h>
#include <linux/poison.h>
#include <linux/initrd.h>
#include <linux/export.h>
#include <linux/cma.h>
#include <linux/gfp.h>
#include <linux/dma-direct.h>
#include <linux/percpu.h>
#include <asm/processor.h>
#include <linux/uaccess.h>
#include <asm/pgalloc.h>
#include <asm/ctlreg.h>
#include <asm/kfence.h>
#include <asm/dma.h>
#include <asm/abs_lowcore.h>
#include <asm/tlb.h>
#include <asm/tlbflush.h>
#include <asm/sections.h>
#include <asm/sclp.h>
#include <asm/set_memory.h>
#include <asm/kasan.h>
#include <asm/dma-mapping.h>
#include <asm/uv.h>
#include <linux/virtio_anchor.h>
#include <linux/virtio_config.h>
#include <linux/execmem.h>
pgd_t swapper_pg_dir[PTRS_PER_PGD] __section(".bss..swapper_pg_dir");
pgd_t invalid_pg_dir[PTRS_PER_PGD] __section(".bss..invalid_pg_dir");
struct ctlreg __bootdata_preserved(s390_invalid_asce);
unsigned long empty_zero_page, zero_page_mask;
EXPORT_SYMBOL(empty_zero_page);
EXPORT_SYMBOL(zero_page_mask);
static void __init setup_zero_pages(void)
{
unsigned long total_pages = PHYS_PFN(memblock_phys_mem_size() - memblock_reserved_size());
unsigned int order;
struct page *page;
int i;
/* Latest machines require a mapping granularity of 512KB */
order = 7;
/* Limit number of empty zero pages for small memory sizes */
while (order > 2 && (total_pages >> 10) < (1UL << order))
order--;
empty_zero_page = __get_free_pages(GFP_KERNEL | __GFP_ZERO, order);
if (!empty_zero_page)
panic("Out of memory in setup_zero_pages");
page = virt_to_page((void *) empty_zero_page);
split_page(page, order);
for (i = 1 << order; i > 0; i--) {
mark_page_reserved(page);
page++;
}
zero_page_mask = ((PAGE_SIZE << order) - 1) & PAGE_MASK;
}
/*
* paging_init() sets up the page tables
*/
void __init paging_init(void)
{
unsigned long max_zone_pfns[MAX_NR_ZONES];
vmem_map_init();
sparse_init();
zone_dma_bits = 31;
memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
max_zone_pfns[ZONE_DMA] = virt_to_pfn(MAX_DMA_ADDRESS);
max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
free_area_init(max_zone_pfns);
}
void mark_rodata_ro(void)
{
unsigned long size = __end_ro_after_init - __start_ro_after_init;
if (MACHINE_HAS_NX)
system_ctl_set_bit(0, CR0_INSTRUCTION_EXEC_PROTECTION_BIT);
__set_memory_ro(__start_ro_after_init, __end_ro_after_init);
pr_info("Write protected read-only-after-init data: %luk\n", size >> 10);
}
int set_memory_encrypted(unsigned long vaddr, int numpages)
{
int i;
/* make specified pages unshared, (swiotlb, dma_free) */
for (i = 0; i < numpages; ++i) {
uv_remove_shared(virt_to_phys((void *)vaddr));
vaddr += PAGE_SIZE;
}
return 0;
}
int set_memory_decrypted(unsigned long vaddr, int numpages)
{
int i;
/* make specified pages shared (swiotlb, dma_alloca) */
for (i = 0; i < numpages; ++i) {
uv_set_shared(virt_to_phys((void *)vaddr));
vaddr += PAGE_SIZE;
}
return 0;
}
/* are we a protected virtualization guest? */
bool force_dma_unencrypted(struct device *dev)
{
return is_prot_virt_guest();
}
/* protected virtualization */
static void pv_init(void)
{
if (!is_prot_virt_guest())
return;
virtio_set_mem_acc_cb(virtio_require_restricted_mem_acc);
/* make sure bounce buffers are shared */
swiotlb_init(true, SWIOTLB_FORCE | SWIOTLB_VERBOSE);
swiotlb_update_mem_attributes();
}
void __init mem_init(void)
{
cpumask_set_cpu(0, &init_mm.context.cpu_attach_mask);
cpumask_set_cpu(0, mm_cpumask(&init_mm));
set_max_mapnr(max_low_pfn);
high_memory = (void *) __va(max_low_pfn * PAGE_SIZE);
pv_init();
kfence_split_mapping();
/* this will put all low memory onto the freelists */
memblock_free_all();
setup_zero_pages(); /* Setup zeroed pages. */
}
unsigned long memory_block_size_bytes(void)
{
/*
* Make sure the memory block size is always greater
* or equal than the memory increment size.
*/
return max_t(unsigned long, MIN_MEMORY_BLOCK_SIZE, sclp.rzm);
}
unsigned long __per_cpu_offset[NR_CPUS] __read_mostly;
EXPORT_SYMBOL(__per_cpu_offset);
static int __init pcpu_cpu_distance(unsigned int from, unsigned int to)
{
return LOCAL_DISTANCE;
}
static int __init pcpu_cpu_to_node(int cpu)
{
return 0;
}
void __init setup_per_cpu_areas(void)
{
unsigned long delta;
unsigned int cpu;
int rc;
/*
* Always reserve area for module percpu variables. That's
* what the legacy allocator did.
*/
rc = pcpu_embed_first_chunk(PERCPU_MODULE_RESERVE,
PERCPU_DYNAMIC_RESERVE, PAGE_SIZE,
pcpu_cpu_distance,
pcpu_cpu_to_node);
if (rc < 0)
panic("Failed to initialize percpu areas.");
delta = (unsigned long)pcpu_base_addr - (unsigned long)__per_cpu_start;
for_each_possible_cpu(cpu)
__per_cpu_offset[cpu] = delta + pcpu_unit_offsets[cpu];
}
#ifdef CONFIG_MEMORY_HOTPLUG
#ifdef CONFIG_CMA
/* Prevent memory blocks which contain cma regions from going offline */
struct s390_cma_mem_data {
unsigned long start;
unsigned long end;
};
static int s390_cma_check_range(struct cma *cma, void *data)
{
struct s390_cma_mem_data *mem_data;
unsigned long start, end;
mem_data = data;
start = cma_get_base(cma);
end = start + cma_get_size(cma);
if (end < mem_data->start)
return 0;
if (start >= mem_data->end)
return 0;
return -EBUSY;
}
static int s390_cma_mem_notifier(struct notifier_block *nb,
unsigned long action, void *data)
{
struct s390_cma_mem_data mem_data;
struct memory_notify *arg;
int rc = 0;
arg = data;
mem_data.start = arg->start_pfn << PAGE_SHIFT;
mem_data.end = mem_data.start + (arg->nr_pages << PAGE_SHIFT);
if (action == MEM_GOING_OFFLINE)
rc = cma_for_each_area(s390_cma_check_range, &mem_data);
return notifier_from_errno(rc);
}
static struct notifier_block s390_cma_mem_nb = {
.notifier_call = s390_cma_mem_notifier,
};
static int __init s390_cma_mem_init(void)
{
return register_memory_notifier(&s390_cma_mem_nb);
}
device_initcall(s390_cma_mem_init);
#endif /* CONFIG_CMA */
int arch_add_memory(int nid, u64 start, u64 size,
struct mhp_params *params)
{
unsigned long start_pfn = PFN_DOWN(start);
unsigned long size_pages = PFN_DOWN(size);
int rc;
if (WARN_ON_ONCE(params->pgprot.pgprot != PAGE_KERNEL.pgprot))
return -EINVAL;
VM_BUG_ON(!mhp_range_allowed(start, size, true));
rc = vmem_add_mapping(start, size);
if (rc)
return rc;
rc = __add_pages(nid, start_pfn, size_pages, params);
if (rc)
vmem_remove_mapping(start, size);
return rc;
}
void arch_remove_memory(u64 start, u64 size, struct vmem_altmap *altmap)
{
unsigned long start_pfn = start >> PAGE_SHIFT;
unsigned long nr_pages = size >> PAGE_SHIFT;
__remove_pages(start_pfn, nr_pages, altmap);
vmem_remove_mapping(start, size);
}
#endif /* CONFIG_MEMORY_HOTPLUG */
#ifdef CONFIG_EXECMEM
static struct execmem_info execmem_info __ro_after_init;
struct execmem_info __init *execmem_arch_setup(void)
{
unsigned long module_load_offset = 0;
unsigned long start;
if (kaslr_enabled())
module_load_offset = get_random_u32_inclusive(1, 1024) * PAGE_SIZE;
start = MODULES_VADDR + module_load_offset;
execmem_info = (struct execmem_info){
.ranges = {
[EXECMEM_DEFAULT] = {
.flags = EXECMEM_KASAN_SHADOW,
.start = start,
.end = MODULES_END,
.pgprot = PAGE_KERNEL,
.alignment = MODULE_ALIGN,
},
},
};
return &execmem_info;
}
#endif /* CONFIG_EXECMEM */