lkml.org 
[lkml]   [2022]   [Jan]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 3/3] efi: enforce usable memory range after reserving regions
Date
The usable memory range may be restricted through parameters that
did not come from EFI, like the FDT "linux,usable-memory-range"
property.

Enforce this range after the EFI memory map regions have been
processed.

Signed-off-by: Frank van der Linden <fllinden@amazon.com>
---
drivers/firmware/efi/efi-init.c | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/drivers/firmware/efi/efi-init.c b/drivers/firmware/efi/efi-init.c
index b19ce1a83f91..280e9178c7df 100644
--- a/drivers/firmware/efi/efi-init.c
+++ b/drivers/firmware/efi/efi-init.c
@@ -204,6 +204,13 @@ static __init void reserve_regions(void)
memblock_reserve(paddr, size);
}
}
+
+ /*
+ * Done, filter !nomap memory we just added so that the
+ * usable range is enforced. This is normally only set
+ * for crash kernels on some architectures.
+ */
+ memblock_enforce_usable_range();
}

void __init efi_init(void)
--
2.32.0
\
 
 \ /
  Last update: 2022-01-10 22:11    [W:0.104 / U:0.548 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site