UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

x86: Log resource clipping for E820 regions 

When remove_e820_regions() clips a resource because an E820 region overlaps
it, log a note in dmesg to add in debugging.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Bjorn Helgaas 2022-04-07 17:42:02 -05:00
parent 93d256cd3c
commit 31bf0f4333
1 changed files with 7 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
arch/x86/kernel/resource.c
View File

@ -1,5 +1,6 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/ioport.h>
#include <linux/printk.h>
#include <asm/e820/api.h>
static void resource_clip(struct resource *res, resource_size_t start,
@ -28,6 +29,7 @@ static void remove_e820_regions(struct resource *avail)
int i;
struct e820_entry *entry;
u64 e820_start, e820_end;
struct resource orig = *avail;
for (i = 0; i < e820_table->nr_entries; i++) {
entry = &e820_table->entries[i];
@ -35,6 +37,11 @@ static void remove_e820_regions(struct resource *avail)
e820_end = entry->addr + entry->size - 1;
resource_clip(avail, e820_start, e820_end);
if (orig.start != avail->start || orig.end != avail->end) {
pr_info("clipped %pR to %pR for e820 entry [mem %#010Lx-%#010Lx]\n",
&orig, avail, e820_start, e820_end);
orig = *avail;
}
}
}