github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-06-03 12:03:54 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

arm64: Convert ID_AA64MMFR0_EL1.TGRAN{4,16,64}_2 to UnsignedEnum

Browse Source 
ID_AA64MMFR0_EL1.TGRAN{4,16,64}_2 are currently represented as unordered
enumerations. However, the architecture treats them as Unsigned,
as hinted to by the MRS data:

(FEAT_S2TGran4K <=> (((UInt(ID_AA64MMFR0_EL1.TGran4_2) == 0) &&
		       FEAT_TGran4K) ||
		     (UInt(ID_AA64MMFR0_EL1.TGran4_2) >= 2))))

and similar descriptions exist for 16 and 64k.

This is also confirmed by D24.1.3.3 ("Alternative ID scheme used for
ID_AA64MMFR0_EL1 stage 2 granule sizes") in the L.b revision of
the ARM ARM.

Turn these fields into UnsignedEnum so that we can use the above
description more or less literally.

Reviewed-by: Fuad Tabba <tabba@google.com>
Tested-by: Fuad Tabba <tabba@google.com>
Link: https://patch.msgid.link/20251210173024.561160-3-maz@kernel.org
Signed-off-by: Marc Zyngier <maz@kernel.org>
This commit is contained in:
Marc Zyngier 2025-12-10 17:30:20 +00:00
parent a98cd5c298
commit f1640174c8
1 changed files with 3 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
arch/arm64/tools/sysreg
View File

@ -2098,18 +2098,18 @@ UnsignedEnum 47:44 EXS
0b0000 NI
0b0001 IMP
EndEnum
Enum 43:40 TGRAN4_2
UnsignedEnum 43:40 TGRAN4_2
0b0000 TGRAN4
0b0001 NI
0b0010 IMP
0b0011 52_BIT
EndEnum
Enum 39:36 TGRAN64_2
UnsignedEnum 39:36 TGRAN64_2
0b0000 TGRAN64
0b0001 NI
0b0010 IMP
EndEnum
Enum 35:32 TGRAN16_2
UnsignedEnum 35:32 TGRAN16_2
0b0000 TGRAN16
0b0001 NI
0b0010 IMP