Hi Shannon,
On 17/03/16 09:41, Shannon Zhao wrote:
From: Shannon Zhao <shannon.z...@linaro.org>
Store the event-channel interrupt number and flag in HVM parameter
HVM_PARAM_CALLBACK_IRQ. Then Dom0 could get it through hypercall
HVMOP_get_param.
Signed-off-by: Shannon Zhao <shannon.z...@linaro.org>
Reviewed-by: Stefano Stabellini <stefano.stabell...@eu.citrix.com>
---
xen/arch/arm/domain_build.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
index a4abf28..dcbcc4c 100644
--- a/xen/arch/arm/domain_build.c
+++ b/xen/arch/arm/domain_build.c
@@ -2008,6 +2008,7 @@ static void initrd_load(struct kernel_info *kinfo)
static void evtchn_fixup(struct domain *d, struct kernel_info *kinfo)
{
int res, node;
+ u64 val;
gic_interrupt_t intr;
/*
@@ -2023,6 +2024,15 @@ static void evtchn_fixup(struct domain *d, struct
kernel_info *kinfo)
printk("Allocating PPI %u for event channel interrupt\n",
d->arch.evtchn_irq);
+ /* Set the value of domain param HVM_PARAM_CALLBACK_IRQ */
+ val = (u64)HVM_PARAM_CALLBACK_TYPE_PPI << 56;
+ val |= (2 << 8); /* Active-low level-sensitive */
+ val |= d->arch.evtchn_irq & 0xff;
+ d->arch.hvm_domain.params[HVM_PARAM_CALLBACK_IRQ] = val;
+
+ if ( !acpi_disabled )
+ return;
Please add a comment to explain that you can only get the event channel
interrupt via hypercall when ACPI is used.
+
/* Fix up "interrupts" in /hypervisor node */
node = fdt_path_offset(kinfo->fdt, "/hypervisor");
if ( node < 0 )
Regards,
--
Julien Grall
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