diff options
| author | Juergen Gross <[email protected]> | 2023-05-02 14:09:29 +0200 |
|---|---|---|
| committer | Borislav Petkov (AMD) <[email protected]> | 2023-06-01 15:04:33 +0200 |
| commit | 973df1942068c0cc72244ce7dce5e5aeca03ad5f (patch) | |
| tree | 3fc6230c4acde5b2c7ede986d865766d2a765b1f /arch/x86/mm/pgtable.c | |
| parent | 8227f40ade2362982505f66f1614b78a3a083ec9 (diff) | |
x86/mtrr: Don't let mtrr_type_lookup() return MTRR_TYPE_INVALID
mtrr_type_lookup() should always return a valid memory type. In case
there is no information available, it should return the default UC.
This will remove the last case where mtrr_type_lookup() can return
MTRR_TYPE_INVALID, so adjust the comment in include/uapi/asm/mtrr.h.
Note that removing the MTRR_TYPE_INVALID #define from that header
could break user code, so it has to stay.
At the same time the mtrr_type_lookup() stub for the !CONFIG_MTRR
case should set uniform to 1, as if the memory range would be
covered by no MTRR at all.
Suggested-by: Linus Torvalds <[email protected]>
Signed-off-by: Juergen Gross <[email protected]>
Signed-off-by: Borislav Petkov (AMD) <[email protected]>
Tested-by: Michael Kelley <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Borislav Petkov (AMD) <[email protected]>
Diffstat (limited to 'arch/x86/mm/pgtable.c')
0 files changed, 0 insertions, 0 deletions