[PATCH v2 0/2] Few timer and AIA fixes for KVM RISC-V
patchwork-bot+linux-riscv at kernel.org
patchwork-bot+linux-riscv at kernel.org
Wed Aug 6 10:15:40 PDT 2025
Hello:
This series was applied to riscv/linux.git (for-next)
by Anup Patel <anup at brainfault.org>:
On Mon, 7 Jul 2025 09:23:42 +0530 you wrote:
> The RISC-V Privileged specificaiton says the following: "WFI is also
> required to resume execution for locally enabled interrupts pending
> at any privilege level, regardless of the global interrupt enable at
> each privilege level."
>
> Based on the above, if there is pending VS-timer interrupt when the
> host (aka HS-mode) executes WFI then such a WFI will simply become NOP
> and not do anything. This result in QEMU RISC-V consuming a lot of CPU
> time on the x86 machine where it is running. The PATCH1 solves this
> issue by adding appropriate cleanup in KVM RISC-V timer virtualization.
>
> [...]
Here is the summary with links:
- [v2,1/2] RISC-V: KVM: Disable vstimecmp before exiting to user-space
https://git.kernel.org/riscv/c/57f576e860d3
- [v2,2/2] RISC-V: KVM: Move HGEI[E|P] CSR access to IMSIC virtualization
(no matching commit)
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