RISC-V: KVM: Fix APLIC in_clrip[x] read emulation

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The reads to APLIC in_clrip[x] registers returns rectified input values
of the interrupt sources.

A rectified input value of an interrupt source is defined by the section
"4.5.2 Source configurations (sourcecfg[1]–sourcecfg[1023])" of the
RISC-V AIA specification as:

    rectified input value = (incoming wire value) XOR (source is inverted)

Update the riscv_aplic_input() implementation to match the above.

Cc: stable@vger.kernel.org
Fixes: 74967aa208 ("RISC-V: KVM: Add in-kernel emulation of AIA APLIC")
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Signed-off-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20240321085041.1955293-3-apatel@ventanamicro.com

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Anup Patel 2024-03-21 14:20:41 +05:30 • committed by Anup Patel

parent d8dd9f113e

commit 8e936e9871

1 changed files with 18 additions and 3 deletions

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arch/riscv/kvm/aia_aplic.c

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