LoongArch: KVM: Support various access size with pch_pic emulation

[PATCH 0/5] LoongArch: KVM: Support various access size with pch_pic emulation

Posted by Bibo Mao 1 month, 3 weeks ago

With PCH PIC interrupt controller emulation driver, its access size is
hardcoded now. Instead the MMIO register can be accessed with different
size such 1/2/4/8.

This patchset adds various read/write size support with emulation
function loongarch_pch_pic_read() and loongarch_pch_pic_write().

Bibo Mao (5):
  LoongArch: KVM: Set version information at initial stage
  LoongArch: KVM: Add read length support in loongarch_pch_pic_read()
  LoongArch: KVM: Add IRR and ISR register read emulation
  LoongArch: KVM: Add different length support in
    loongarch_pch_pic_write()
  LoongArch: KVM: Add address alignment check in pch_pic register access

 arch/loongarch/include/asm/kvm_pch_pic.h |  15 +-
 arch/loongarch/kvm/intc/pch_pic.c        | 239 ++++++++++-------------
 2 files changed, 120 insertions(+), 134 deletions(-)


base-commit: 8f5ae30d69d7543eee0d70083daf4de8fe15d585
-- 
2.39.3

Re: [PATCH 0/5] LoongArch: KVM: Support various access size with pch_pic emulation

Posted by Huacai Chen 1 month ago

Applied with some modifications (e.g. rename LoongArchPIC_ID to
pch_pic_id for kernel coding style), so you'd better test it [1].

[1] https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson.git/log/?h=loongarch-kvm


Huacai

On Mon, Aug 11, 2025 at 10:13 AM Bibo Mao <maobibo@loongson.cn> wrote:
>
> With PCH PIC interrupt controller emulation driver, its access size is
> hardcoded now. Instead the MMIO register can be accessed with different
> size such 1/2/4/8.
>
> This patchset adds various read/write size support with emulation
> function loongarch_pch_pic_read() and loongarch_pch_pic_write().
>
> Bibo Mao (5):
>   LoongArch: KVM: Set version information at initial stage
>   LoongArch: KVM: Add read length support in loongarch_pch_pic_read()
>   LoongArch: KVM: Add IRR and ISR register read emulation
>   LoongArch: KVM: Add different length support in
>     loongarch_pch_pic_write()
>   LoongArch: KVM: Add address alignment check in pch_pic register access
>
>  arch/loongarch/include/asm/kvm_pch_pic.h |  15 +-
>  arch/loongarch/kvm/intc/pch_pic.c        | 239 ++++++++++-------------
>  2 files changed, 120 insertions(+), 134 deletions(-)
>
>
> base-commit: 8f5ae30d69d7543eee0d70083daf4de8fe15d585
> --
> 2.39.3
>
>