mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-26 00:35:35 +07:00
a11940978b
If we echo an address the hypervisor doesn't like to /sys/devices/system/memory/probe we oops the box: # echo 0x10000000000 > /sys/devices/system/memory/probe kernel BUG at arch/powerpc/mm/hash_utils_64.c:541! The backtrace is: create_section_mapping arch_add_memory add_memory memory_probe_store sysdev_class_store sysfs_write_file vfs_write SyS_write In create_section_mapping we BUG if htab_bolt_mapping returned an error. A better approach is to return an error which will propagate back to userspace. Rerunning the test with this patch applied: # echo 0x10000000000 > /sys/devices/system/memory/probe -bash: echo: write error: Invalid argument Signed-off-by: Anton Blanchard <anton@samba.org> Cc: stable@kernel.org Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
33 lines
905 B
C
33 lines
905 B
C
#ifndef _ASM_POWERPC_SPARSEMEM_H
|
|
#define _ASM_POWERPC_SPARSEMEM_H 1
|
|
#ifdef __KERNEL__
|
|
|
|
#ifdef CONFIG_SPARSEMEM
|
|
/*
|
|
* SECTION_SIZE_BITS 2^N: how big each section will be
|
|
* MAX_PHYSADDR_BITS 2^N: how much physical address space we have
|
|
* MAX_PHYSMEM_BITS 2^N: how much memory we can have in that space
|
|
*/
|
|
#define SECTION_SIZE_BITS 24
|
|
|
|
#define MAX_PHYSADDR_BITS 44
|
|
#define MAX_PHYSMEM_BITS 44
|
|
|
|
#endif /* CONFIG_SPARSEMEM */
|
|
|
|
#ifdef CONFIG_MEMORY_HOTPLUG
|
|
extern int create_section_mapping(unsigned long start, unsigned long end);
|
|
extern int remove_section_mapping(unsigned long start, unsigned long end);
|
|
#ifdef CONFIG_NUMA
|
|
extern int hot_add_scn_to_nid(unsigned long scn_addr);
|
|
#else
|
|
static inline int hot_add_scn_to_nid(unsigned long scn_addr)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_NUMA */
|
|
#endif /* CONFIG_MEMORY_HOTPLUG */
|
|
|
|
#endif /* __KERNEL__ */
|
|
#endif /* _ASM_POWERPC_SPARSEMEM_H */
|