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| author | Andrew Jones <ajones@ventanamicro.com> | 2025-02-17 09:45:10 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-03-07 18:25:36 +0100 |
| commit | ab306f492c27d6ffaf3eff87ebccbeed2cab66ff (patch) | |
| tree | d2abfe759129b3ebc9a0356712f6b61e615696ae /scripts/patch-kernel | |
| parent | f5009ddfd70af1abea1f97313c6631ae2954395a (diff) | |
| download | linux-ab306f492c27d6ffaf3eff87ebccbeed2cab66ff.tar.gz linux-ab306f492c27d6ffaf3eff87ebccbeed2cab66ff.tar.bz2 linux-ab306f492c27d6ffaf3eff87ebccbeed2cab66ff.zip | |
riscv: KVM: Fix SBI IPI error generation
[ Upstream commit 0611f78f83c93c000029ab01daa28166d03590ed ]
When an invalid function ID of an SBI extension is used we should
return not-supported, not invalid-param. Also, when we see that at
least one hartid constructed from the base and mask parameters is
invalid, then we should return invalid-param. Finally, rather than
relying on overflowing a left shift to result in zero and then using
that zero in a condition which [correctly] skips sending an IPI (but
loops unnecessarily), explicitly check for overflow and exit the loop
immediately.
Fixes: 5f862df5585c ("RISC-V: KVM: Add v0.1 replacement SBI extensions defined in v0.2")
Signed-off-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20250217084506.18763-10-ajones@ventanamicro.com
Signed-off-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'scripts/patch-kernel')
0 files changed, 0 insertions, 0 deletions