RISC-V: KVM: Redirect AMO load/store misaligned traps to guest

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The M-mode redirects an unhandled misaligned trap back
to S-mode when not delegating it to VS-mode(hedeleg).
However, KVM running in HS-mode terminates the VS-mode
software when back from M-mode.
The KVM should redirect the trap back to VS-mode, and
let VS-mode trap handler decide the next step.
Here is a way to handle misaligned traps in KVM,
not only directing them to VS-mode or terminate it.

Signed-off-by: wchen <waylingII@gmail.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Anup Patel <anup@brainfault.org>

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wchen 2023-05-20 23:01:16 +08:00 • committed by Anup Patel

parent 78329084b8

commit 19bff88e65

2 changed files with 4 additions and 0 deletions

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2

arch/riscv/include/asm/csr.h

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2

arch/riscv/kvm/vcpu_exit.c

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