tmakin/tegra-linux-noble
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

RISC-V: KVM: Fix APLIC in_clrip and clripnum write emulation

Browse Source 
BugLink: https://bugs.launchpad.net/bugs/2101915

[ Upstream commit 60821fb4dd7345e5662094accf0a52845306de8c ]

In the section "4.7 Precise effects on interrupt-pending bits"
of the RISC-V AIA specification defines that:

"If the source mode is Level1 or Level0 and the interrupt domain
is configured in MSI delivery mode (domaincfg.DM = 1):
The pending bit is cleared whenever the rectified input value is
low, when the interrupt is forwarded by MSI, or by a relevant
write to an in_clrip register or to clripnum."

Update the aplic_write_pending() to match the spec.

Fixes: d8dd9f113e16 ("RISC-V: KVM: Fix APLIC setipnum_le/be write emulation")
Signed-off-by: Yong-Xuan Wang <yongxuan.wang@sifive.com>
Reviewed-by: Vincent Chen <vincent.chen@sifive.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20241029085542.30541-1-yongxuan.wang@sifive.com
Signed-off-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Koichiro Den <koichiro.den@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
This commit is contained in:
Yong-Xuan Wang
2025-03-11 08:51:19 +09:00
committed by Stefan Bader
parent eb0cf4dee2
commit 676acd00a0
1 changed files with 2 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
arch/riscv/kvm/aia_aplic.c
+2 -1
View File
@@ -143,7 +143,7 @@ static void aplic_write_pending(struct aplic *aplic, u32 irq, bool pending)
if (sm == APLIC_SOURCECFG_SM_LEVEL_HIGH ||
sm == APLIC_SOURCECFG_SM_LEVEL_LOW) {
if (!pending)
goto skip_write_pending;
goto noskip_write_pending;
if ((irqd->state & APLIC_IRQ_STATE_INPUT) &&
sm == APLIC_SOURCECFG_SM_LEVEL_LOW)
goto skip_write_pending;
@@ -152,6 +152,7 @@ static void aplic_write_pending(struct aplic *aplic, u32 irq, bool pending)
goto skip_write_pending;
}
noskip_write_pending:
if (pending)
irqd->state |= APLIC_IRQ_STATE_PENDING;
else