On Fri, 2023-04-28 at 19:59 +0100, Marc Zyngier wrote:
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>
> On 2023-04-28 11:36, Yi-De Wu wrote:
> > From: "Yingshiuan Pan" <yingshiuan.pan@xxxxxxxxxxxx>
> >
> > Enable GenieZone to handle virtual interrupt injection request.
> >
> > Signed-off-by: Yingshiuan Pan <yingshiuan.pan@xxxxxxxxxxxx>
> > Signed-off-by: Yi-De Wu <yi-de.wu@xxxxxxxxxxxx>
> > ---
> > arch/arm64/geniezone/Makefile | 2 +-
> > arch/arm64/geniezone/gzvm_arch.c | 24 ++++++--
> > arch/arm64/geniezone/gzvm_arch.h | 11 ++++
> > arch/arm64/geniezone/gzvm_irqchip.c | 88
> > +++++++++++++++++++++++++++++
> > drivers/virt/geniezone/gzvm_vm.c | 75 ++++++++++++++++++++++++
> > include/linux/gzvm_drv.h | 4 ++
> > include/uapi/linux/gzvm.h | 38 ++++++++++++-
> > 7 files changed, 235 insertions(+), 7 deletions(-)
> > create mode 100644 arch/arm64/geniezone/gzvm_irqchip.c
>
> [...]
>
> > +++ b/arch/arm64/geniezone/gzvm_irqchip.c
> > @@ -0,0 +1,88 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * Copyright (c) 2023 MediaTek Inc.
> > + */
> > +
> > +#include <linux/irqchip/arm-gic-v3.h>
> > +#include <kvm/arm_vgic.h>
>
> NAK.
>
> There is no way you can rely on anything from KVM in
> your own hypervisor code.
>
Same with previous discussion, we'd like to copy or rename the related
part from KVM and keep the maintainance at our own if it's ok.
> > +
> > +#include <linux/gzvm.h>
> > +#include <linux/gzvm_drv.h>
> > +#include "gzvm_arch.h"
> > +
> > +/**
> > + * gzvm_sync_vgic_state() - Check all LRs synced from gz
> > hypervisor
> > + *
> > + * Traverse all LRs, see if any EOIed vint, notify_acked_irq if
> > any.
> > + * GZ does not fold/unfold everytime KVM_RUN, so we have to
> > traverse
> > all saved
> > + * LRs. It will not takes much more time comparing to fold/unfold
> > everytime
> > + * GZVM_RUN, because there are only few LRs.
> > + */
> > +void gzvm_sync_vgic_state(struct gzvm_vcpu *vcpu)
> > +{
> > +}
> > +
> > +/* is_irq_valid() - Check the irq number and irq_type are matched
> > */
> > +static bool is_irq_valid(u32 irq, u32 irq_type)
> > +{
> > + switch (irq_type) {
> > + case GZVM_IRQ_TYPE_CPU:
> > + /* 0 ~ 15: SGI */
> > + if (likely(irq <= GZVM_IRQ_CPU_FIQ))
> > + return true;
> > + break;
> > + case GZVM_IRQ_TYPE_PPI:
> > + /* 16 ~ 31: PPI */
> > + if (likely(irq >= VGIC_NR_SGIS && irq <
> > VGIC_NR_PRIVATE_IRQS))
>
> What happens if I redefine all these macros tomorrow? None of
> this code should rely on anything that is *INTERNAL* to KVM.
>
> M.
> --
> Jazz is not dead. It just smells funny...
