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kvm: add support for -machine kernel_irqchip=split

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This patch adds the initial plumbing for split IRQ chip mode via
KVM_CAP_SPLIT_IRQCHIP. In addition to option processing, a number of
kvm_*_in_kernel macros are defined to help clarify which component is
where.

Signed-off-by: Matt Gingell <gingell@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Matt Gingell 2015-11-16 10:03:06 -08:00 • committed by Paolo Bonzini
parent ff99aa64b1
commit 32c18a2dba
6 changed files with 73 additions and 9 deletions
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2
include/hw/boards.h
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@ -35,6 +35,7 @@ extern MachineState *current_machine;
bool machine_usb(MachineState *machine);
bool machine_kernel_irqchip_allowed(MachineState *machine);
bool machine_kernel_irqchip_required(MachineState *machine);
bool machine_kernel_irqchip_split(MachineState *machine);
int machine_kvm_shadow_mem(MachineState *machine);
int machine_phandle_start(MachineState *machine);
bool machine_dump_guest_core(MachineState *machine);
@ -111,6 +112,7 @@ struct MachineState {
char *accel;
bool kernel_irqchip_allowed;
bool kernel_irqchip_required;
bool kernel_irqchip_split;
int kvm_shadow_mem;
char *dtb;
char *dumpdtb;

11
include/sysemu/kvm.h
View file

@ -43,6 +43,7 @@
extern bool kvm_allowed;
extern bool kvm_kernel_irqchip;
extern bool kvm_split_irqchip;
extern bool kvm_async_interrupts_allowed;
extern bool kvm_halt_in_kernel_allowed;
extern bool kvm_eventfds_allowed;
@ -70,6 +71,16 @@ extern bool kvm_ioeventfd_any_length_allowed;
*/
#define kvm_irqchip_in_kernel() (kvm_kernel_irqchip)
/**
* kvm_irqchip_is_split:
*
* Returns: true if the user asked us to split the irqchip
* implementation between user and kernel space. The details are
* architecture and machine specific. On PC, it means that the PIC,
* IOAPIC, and PIT are in user space while the LAPIC is in the kernel.
*/
#define kvm_irqchip_is_split() (kvm_split_irqchip)
/**
* kvm_async_interrupts_enabled:
*