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| author | Vit Kabele <vit@kabele.me> | 2022-10-27 19:50:59 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2022-10-28 17:28:22 +0200 |
| commit | 8ff2906513f5ad2f6665b94d1763a26e30bfa47b (patch) | |
| tree | 6f9a96da2a40a1148337bef3bdbf3eb119f59591 /drivers/acpi/acpica/tbutils.c | |
| parent | 4fe54f509304ea6cc80a40620cac860c57edf7f3 (diff) | |
ACPICA: Do not touch VGA memory when EBDA < 1ki_b
ACPICA commit a36eda9631e84f271319c41288889dd5b1329369
The ACPICA code assumes that EBDA region must be at least 1ki_b in size.
Because this is not guaranteed, it might happen that while scanning the
memory for RSDP pointer, the kernel touches memory above 640ki_b.
This is unwanted as the VGA memory range may not be decoded or
even present when running under virtualization.
Link: https://github.com/acpica/acpica/commit/a36eda96
Signed-off-by: Vit Kabele <vit@kabele.me>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/acpica/tbutils.c')
0 files changed, 0 insertions, 0 deletions