diff options
| author | Simon Glass <[email protected]> | 2025-03-15 14:25:42 +0000 |
|---|---|---|
| committer | Tom Rini <[email protected]> | 2025-04-03 11:41:55 -0600 |
| commit | 8bd563707d909d7bb414de2c0ff4ab66eb8009db (patch) | |
| tree | 2c2c62b064691532cc3f4721072d7ff3ab04533e /arch/x86/include | |
| parent | 5ee60f3afa146e45752e1e99c382f18dd7f8200e (diff) | |
x86: Add functions to convert between mtrr size and mask
Rather than repeating the same code in several places, add some
functions which can do the conversion.
Use the cpu_phys_address_size() function to obtain the physical-address
size, since it is more reliable with kvm, where the host CPU may have a
different value from the emulation CPU.
Signed-off-by: Simon Glass <[email protected]>
Diffstat (limited to 'arch/x86/include')
| -rw-r--r-- | arch/x86/include/asm/mtrr.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/x86/include/asm/mtrr.h b/arch/x86/include/asm/mtrr.h index 2e995f54061..67e897daa25 100644 --- a/arch/x86/include/asm/mtrr.h +++ b/arch/x86/include/asm/mtrr.h @@ -91,6 +91,22 @@ struct mtrr_info { }; /** + * mtrr_to_size() - Convert a mask to a size value + * + * @mask: Value of the mask register + * Return: associated size + */ +u64 mtrr_to_size(u64 mask); + +/** + * mtrr_to_mask() - Convert a size to a mask value + * + * @size: Value of the size register + * Return: associated mask, without MTRR_PHYS_MASK_VALID + */ +u64 mtrr_to_mask(u64 size); + +/** * mtrr_open() - Prepare to adjust MTRRs * * Use mtrr_open() passing in a structure - this function will init it. Then |