diff options
| author | Baoquan He <bhe@redhat.com> | 2017-07-09 14:37:40 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-07-18 11:11:11 +0200 |
| commit | 87891b01b54210763117f0a67b022cd94de6cd13 (patch) | |
| tree | 448739f43e6533731b5aace529a4b9266e9fddd9 /arch | |
| parent | x86/boot/KASLR: Wrap e820 entries walking code into new function process_e820... (diff) | |
| download | linux-87891b01b54210763117f0a67b022cd94de6cd13.tar.xz linux-87891b01b54210763117f0a67b022cd94de6cd13.zip | |
x86/boot/KASLR: Switch to pass struct mem_vector to process_e820_entry()
This makes process_e820_entry() be able to process any kind of memory
region.
Signed-off-by: Baoquan He <bhe@redhat.com>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: fanc.fnst@cn.fujitsu.com
Cc: izumi.taku@jp.fujitsu.com
Cc: matt@codeblueprint.co.uk
Cc: thgarnie@google.com
Link: http://lkml.kernel.org/r/1499603862-11516-3-git-send-email-bhe@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/boot/compressed/kaslr.c | 25 |
1 files changed, 14 insertions, 11 deletions
diff --git a/arch/x86/boot/compressed/kaslr.c b/arch/x86/boot/compressed/kaslr.c index 1485f48aeda1..36ff9f729c43 100644 --- a/arch/x86/boot/compressed/kaslr.c +++ b/arch/x86/boot/compressed/kaslr.c @@ -479,31 +479,31 @@ static unsigned long slots_fetch_random(void) return 0; } -static void process_e820_entry(struct boot_e820_entry *entry, +static void process_e820_entry(struct mem_vector *entry, unsigned long minimum, unsigned long image_size) { struct mem_vector region, overlap; struct slot_area slot_area; unsigned long start_orig, end; - struct boot_e820_entry cur_entry; + struct mem_vector cur_entry; /* On 32-bit, ignore entries entirely above our maximum. */ - if (IS_ENABLED(CONFIG_X86_32) && entry->addr >= KERNEL_IMAGE_SIZE) + if (IS_ENABLED(CONFIG_X86_32) && entry->start >= KERNEL_IMAGE_SIZE) return; /* Ignore entries entirely below our minimum. */ - if (entry->addr + entry->size < minimum) + if (entry->start + entry->size < minimum) return; /* Ignore entries above memory limit */ - end = min(entry->size + entry->addr, mem_limit); - if (entry->addr >= end) + end = min(entry->size + entry->start, mem_limit); + if (entry->start >= end) return; - cur_entry.addr = entry->addr; - cur_entry.size = end - entry->addr; + cur_entry.start = entry->start; + cur_entry.size = end - entry->start; - region.start = cur_entry.addr; + region.start = cur_entry.start; region.size = cur_entry.size; /* Give up if slot area array is full. */ @@ -518,7 +518,7 @@ static void process_e820_entry(struct boot_e820_entry *entry, region.start = ALIGN(region.start, CONFIG_PHYSICAL_ALIGN); /* Did we raise the address above this e820 region? */ - if (region.start > cur_entry.addr + cur_entry.size) + if (region.start > cur_entry.start + cur_entry.size) return; /* Reduce size by any delta from the original address. */ @@ -562,6 +562,7 @@ static void process_e820_entries(unsigned long minimum, unsigned long image_size) { int i; + struct mem_vector region; struct boot_e820_entry *entry; /* Verify potential e820 positions, appending to slots list. */ @@ -570,7 +571,9 @@ static void process_e820_entries(unsigned long minimum, /* Skip non-RAM entries. */ if (entry->type != E820_TYPE_RAM) continue; - process_e820_entry(entry, minimum, image_size); + region.start = entry->addr; + region.size = entry->size; + process_e820_entry(®ion, minimum, image_size); if (slot_area_index == MAX_SLOT_AREA) { debug_putstr("Aborted e820 scan (slot_areas full)!\n"); break; |