From 215e79c01c4e6f766eb9add56c56453e9ea1d948 Mon Sep 17 00:00:00 2001 From: Alexander Graf Date: Wed, 24 Apr 2013 22:24:12 +0200 Subject: KVM: Don't assume that mpstate exists with in-kernel PIC always On PPC, we don't support MP state. So far it's not necessary and I'm not convinced yet that we really need to support it ever. However, the current idle logic in QEMU assumes that an in-kernel PIC also means we support MP state. This assumption is not true anymore. Let's split up the two cases into two different variables. That way PPC can expose an in-kernel PIC, while not implementing MP state. Signed-off-by: Alexander Graf CC: Jan Kiszka --- cpus.c | 2 +- include/sysemu/kvm.h | 10 ++++++++++ kvm-all.c | 2 ++ 3 files changed, 13 insertions(+), 1 deletion(-) diff --git a/cpus.c b/cpus.c index 86571f913c..20958e5a59 100644 --- a/cpus.c +++ b/cpus.c @@ -71,7 +71,7 @@ static bool cpu_thread_is_idle(CPUState *cpu) return true; } if (!cpu->halted || qemu_cpu_has_work(cpu) || - kvm_async_interrupts_enabled()) { + kvm_halt_in_kernel()) { return false; } return true; diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h index fe8bc4077c..24c8e9569c 100644 --- a/include/sysemu/kvm.h +++ b/include/sysemu/kvm.h @@ -42,6 +42,7 @@ extern bool kvm_allowed; extern bool kvm_kernel_irqchip; extern bool kvm_async_interrupts_allowed; +extern bool kvm_halt_in_kernel_allowed; extern bool kvm_irqfds_allowed; extern bool kvm_msi_via_irqfd_allowed; extern bool kvm_gsi_routing_allowed; @@ -72,6 +73,14 @@ extern bool kvm_readonly_mem_allowed; */ #define kvm_async_interrupts_enabled() (kvm_async_interrupts_allowed) +/** + * kvm_halt_in_kernel + * + * Returns: true if halted cpus should still get a KVM_RUN ioctl to run + * inside of kernel space. This only works if MP state is implemented. + */ +#define kvm_halt_in_kernel() (kvm_halt_in_kernel_allowed) + /** * kvm_irqfds_enabled: * @@ -110,6 +119,7 @@ extern bool kvm_readonly_mem_allowed; #define kvm_enabled() (0) #define kvm_irqchip_in_kernel() (false) #define kvm_async_interrupts_enabled() (false) +#define kvm_halt_in_kernel() (false) #define kvm_irqfds_enabled() (false) #define kvm_msi_via_irqfd_enabled() (false) #define kvm_gsi_routing_allowed() (false) diff --git a/kvm-all.c b/kvm-all.c index 7a1684ed78..82ecebb784 100644 --- a/kvm-all.c +++ b/kvm-all.c @@ -107,6 +107,7 @@ struct KVMState KVMState *kvm_state; bool kvm_kernel_irqchip; bool kvm_async_interrupts_allowed; +bool kvm_halt_in_kernel_allowed; bool kvm_irqfds_allowed; bool kvm_msi_via_irqfd_allowed; bool kvm_gsi_routing_allowed; @@ -1303,6 +1304,7 @@ static int kvm_irqchip_create(KVMState *s) * interrupt delivery (though the reverse is not necessarily true) */ kvm_async_interrupts_allowed = true; + kvm_halt_in_kernel_allowed = true; kvm_init_irq_routing(s); -- cgit v1.2.3