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kvm: Decouple 'GSI routing' from 'kernel irqchip'

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Don't assume having an in-kernel irqchip means that GSI
routing is enabled.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Peter Maydell 2012-07-26 15:35:16 +01:00 committed by Avi Kivity
parent 614e41bc26
commit f3e1bed8da
4 changed files with 15 additions and 2 deletions
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3
kvm-all.c
View File

@ -103,6 +103,7 @@ bool kvm_kernel_irqchip;
bool kvm_async_interrupts_allowed;
bool kvm_irqfds_allowed;
bool kvm_msi_via_irqfd_allowed;
bool kvm_gsi_routing_allowed;
static const KVMCapabilityInfo kvm_required_capabilites[] = {
KVM_CAP_INFO(USER_MEMORY),
@ -1099,7 +1100,7 @@ int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg)
struct kvm_irq_routing_entry kroute;
int virq;
if (!kvm_irqchip_in_kernel()) {
if (!kvm_gsi_routing_enabled()) {
return -ENOSYS;
}

1
kvm-stub.c
View File

@ -22,6 +22,7 @@ bool kvm_kernel_irqchip;
bool kvm_async_interrupts_allowed;
bool kvm_irqfds_allowed;
bool kvm_msi_via_irqfd_allowed;
bool kvm_gsi_routing_allowed;
int kvm_init_vcpu(CPUArchState *env)
{

10
kvm.h
View File

@ -27,6 +27,7 @@ extern bool kvm_kernel_irqchip;
extern bool kvm_async_interrupts_allowed;
extern bool kvm_irqfds_allowed;
extern bool kvm_msi_via_irqfd_allowed;
extern bool kvm_gsi_routing_allowed;
#if defined CONFIG_KVM || !defined NEED_CPU_H
#define kvm_enabled() (kvm_allowed)
@ -60,12 +61,21 @@ extern bool kvm_msi_via_irqfd_allowed;
*/
#define kvm_msi_via_irqfd_enabled() (kvm_msi_via_irqfd_allowed)
/**
* kvm_gsi_routing_enabled:
*
* Returns: true if GSI routing is enabled (ie the kernel supports
* it and we're running in a configuration that permits it).
*/
#define kvm_gsi_routing_enabled() (kvm_gsi_routing_allowed)
#else
#define kvm_enabled() (0)
#define kvm_irqchip_in_kernel() (false)
#define kvm_async_interrupts_enabled() (false)
#define kvm_irqfds_enabled() (false)
#define kvm_msi_via_irqfd_enabled() (false)
#define kvm_gsi_routing_allowed() (false)
#endif
struct kvm_run;

3
target-i386/kvm.c
View File

@ -2049,8 +2049,9 @@ void kvm_arch_init_irq_routing(KVMState *s)
}
/* We know at this point that we're using the in-kernel
* irqchip, so we can use irqfds, and on x86 we know
* we can use msi via irqfd.
* we can use msi via irqfd and GSI routing.
*/
kvm_irqfds_allowed = true;
kvm_msi_via_irqfd_allowed = true;
kvm_gsi_routing_allowed = true;
}