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| author | Dave Patel <dave.patel@riscstar.com> | 2026-05-18 14:00:23 +0530 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2026-05-18 14:02:28 +0530 |
| commit | 22d7e99ed2f9c66012a05a82318785d80dd451a0 (patch) | |
| tree | b52fc051cdf3879c865b6eb65a1027020147950e /include | |
| parent | 718e1d194f5a41c657dfe094392abdeb02356680 (diff) | |
| download | opensbi-22d7e99ed2f9c66012a05a82318785d80dd451a0.tar.gz opensbi-22d7e99ed2f9c66012a05a82318785d80dd451a0.zip | |
lib: sbi: domain FP/Vector context support for context switch
This patch adds proper support for per-domain floating-point (FP) and
vector (V) contexts in the domain context switch logic. Each domain
now maintains its own FP and vector state, which is saved and restored
during domain switches.
Conditionalize FP and Vector save/restore based on extensions, unconditional
save and restore of floating-point (FP) and Vector registers fails on
generic platform firmware. This firmware must run on multiple platforms
that may lack these extensions.
Address this by conditionally executing FP save/restore only if the underlying
hart supports the F or D extensions. Similarly, perform Vector save/restore
only if the hart supports the Vector extension.
This improves support for multi-domain systems with FP and Vector
extensions, and prevents corruption of FP/Vector state during domain
switches.
Signed-off-by: Dave Patel <dave.patel@riscstar.com>
Signed-off-by: Anup Patel <anup.patel@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260518083023.997323-4-anup.patel@oss.qualcomm.com
Signed-off-by: Anup Patel <anup@brainfault.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/sbi/sbi_hart.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/sbi/sbi_hart.h b/include/sbi/sbi_hart.h index 937cdf29..543393bb 100644 --- a/include/sbi/sbi_hart.h +++ b/include/sbi/sbi_hart.h @@ -89,6 +89,12 @@ enum sbi_hart_extensions { SBI_HART_EXT_XSIFIVE_CEASE, /** Hart has Smrnmi extension */ SBI_HART_EXT_SMRNMI, + /** Hart has V extension */ + SBI_HART_EXT_V, + /** Hart has F extension */ + SBI_HART_EXT_F, + /** Hart has D extension */ + SBI_HART_EXT_D, /** Maximum index of Hart extension */ SBI_HART_EXT_MAX, |