diff options
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/xen/mmu_pv.c | 5 | ||||
| -rw-r--r-- | arch/x86/xen/setup.c | 34 | ||||
| -rw-r--r-- | arch/x86/xen/xen-ops.h | 3 |
3 files changed, 31 insertions, 11 deletions
diff --git a/arch/x86/xen/mmu_pv.c b/arch/x86/xen/mmu_pv.c index f1ce39d6d32c..839e6613753d 100644 --- a/arch/x86/xen/mmu_pv.c +++ b/arch/x86/xen/mmu_pv.c @@ -2018,10 +2018,7 @@ void __init xen_reserve_special_pages(void) void __init xen_pt_check_e820(void) { - if (xen_is_e820_reserved(xen_pt_base, xen_pt_size)) { - xen_raw_console_write("Xen hypervisor allocated page table memory conflicts with E820 map\n"); - BUG(); - } + xen_chk_is_e820_usable(xen_pt_base, xen_pt_size, "page table"); } static unsigned char dummy_mapping[PAGE_SIZE] __page_aligned_bss; diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c index 4bcc70a71b7d..96765180514b 100644 --- a/arch/x86/xen/setup.c +++ b/arch/x86/xen/setup.c @@ -567,7 +567,7 @@ static void __init xen_ignore_unusable(void) } } -bool __init xen_is_e820_reserved(phys_addr_t start, phys_addr_t size) +static bool __init xen_is_e820_reserved(phys_addr_t start, phys_addr_t size) { struct e820_entry *entry; unsigned mapcnt; @@ -625,6 +625,23 @@ phys_addr_t __init xen_find_free_area(phys_addr_t size) } /* + * Check for an area in physical memory to be usable for non-movable purposes. + * An area is considered to usable if the used E820 map lists it to be RAM. + * In case the area is not usable, crash the system with an error message. + */ +void __init xen_chk_is_e820_usable(phys_addr_t start, phys_addr_t size, + const char *component) +{ + if (!xen_is_e820_reserved(start, size)) + return; + + xen_raw_console_write("Xen hypervisor allocated "); + xen_raw_console_write(component); + xen_raw_console_write(" memory conflicts with E820 map\n"); + BUG(); +} + +/* * Like memcpy, but with physical addresses for dest and src. */ static void __init xen_phys_memcpy(phys_addr_t dest, phys_addr_t src, @@ -824,11 +841,16 @@ char * __init xen_memory_setup(void) * Failing now is better than running into weird problems later due * to relocating (and even reusing) pages with kernel text or data. */ - if (xen_is_e820_reserved(__pa_symbol(_text), - __pa_symbol(_end) - __pa_symbol(_text))) { - xen_raw_console_write("Xen hypervisor allocated kernel memory conflicts with E820 map\n"); - BUG(); - } + xen_chk_is_e820_usable(__pa_symbol(_text), + __pa_symbol(_end) - __pa_symbol(_text), + "kernel"); + + /* + * Check for a conflict of the xen_start_info memory with the target + * E820 map. + */ + xen_chk_is_e820_usable(__pa(xen_start_info), sizeof(*xen_start_info), + "xen_start_info"); /* * Check for a conflict of the hypervisor supplied page tables with diff --git a/arch/x86/xen/xen-ops.h b/arch/x86/xen/xen-ops.h index 0cf16fc79e0b..9a27d1d653d3 100644 --- a/arch/x86/xen/xen-ops.h +++ b/arch/x86/xen/xen-ops.h @@ -48,7 +48,8 @@ void xen_mm_unpin_all(void); void __init xen_relocate_p2m(void); #endif -bool __init xen_is_e820_reserved(phys_addr_t start, phys_addr_t size); +void __init xen_chk_is_e820_usable(phys_addr_t start, phys_addr_t size, + const char *component); unsigned long __ref xen_chk_extra_mem(unsigned long pfn); void __init xen_inv_extra_mem(void); void __init xen_remap_memory(void); |