[PATCH 6.11 423/817] RISC-V: KVM: Fix APLIC in_clrip and clripnum write emulation

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6.11-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Yong-Xuan Wang <yongxuan.wang@xxxxxxxxxx>

[ 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@xxxxxxxxxx>
Reviewed-by: Vincent Chen <vincent.chen@xxxxxxxxxx>
Reviewed-by: Anup Patel <anup@xxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20241029085542.30541-1-yongxuan.wang@xxxxxxxxxx
Signed-off-by: Anup Patel <anup@xxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 arch/riscv/kvm/aia_aplic.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/riscv/kvm/aia_aplic.c b/arch/riscv/kvm/aia_aplic.c
index da6ff1bade0df..f59d1c0c8c43a 100644
--- a/arch/riscv/kvm/aia_aplic.c
+++ b/arch/riscv/kvm/aia_aplic.c
@@ -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
-- 
2.43.0







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