diff options
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/include/asm/xen/events.h | 11 | ||||
| -rw-r--r-- | arch/x86/pci/xen.c | 2 | ||||
| -rw-r--r-- | arch/x86/xen/enlighten_hvm.c | 12 | ||||
| -rw-r--r-- | arch/x86/xen/smp_hvm.c | 5 | ||||
| -rw-r--r-- | arch/x86/xen/time.c | 8 |
5 files changed, 33 insertions, 5 deletions
diff --git a/arch/x86/include/asm/xen/events.h b/arch/x86/include/asm/xen/events.h index 608a79d5a466..e6911caf5bbf 100644 --- a/arch/x86/include/asm/xen/events.h +++ b/arch/x86/include/asm/xen/events.h @@ -20,4 +20,15 @@ static inline int xen_irqs_disabled(struct pt_regs *regs) /* No need for a barrier -- XCHG is a barrier on x86. */ #define xchg_xen_ulong(ptr, val) xchg((ptr), (val)) +extern int xen_have_vector_callback; + +/* + * Events delivered via platform PCI interrupts are always + * routed to vcpu 0 and hence cannot be rebound. + */ +static inline bool xen_support_evtchn_rebind(void) +{ + return (!xen_hvm_domain() || xen_have_vector_callback); +} + #endif /* _ASM_X86_XEN_EVENTS_H */ diff --git a/arch/x86/pci/xen.c b/arch/x86/pci/xen.c index 292ab0364a89..c4b3646bd04c 100644 --- a/arch/x86/pci/xen.c +++ b/arch/x86/pci/xen.c @@ -447,7 +447,7 @@ void __init xen_msi_init(void) int __init pci_xen_hvm_init(void) { - if (!xen_feature(XENFEAT_hvm_pirqs)) + if (!xen_have_vector_callback || !xen_feature(XENFEAT_hvm_pirqs)) return 0; #ifdef CONFIG_ACPI diff --git a/arch/x86/xen/enlighten_hvm.c b/arch/x86/xen/enlighten_hvm.c index 72df54a481d6..078c512b8720 100644 --- a/arch/x86/xen/enlighten_hvm.c +++ b/arch/x86/xen/enlighten_hvm.c @@ -18,6 +18,9 @@ #include "mmu.h" #include "smp.h" +__read_mostly int xen_have_vector_callback; +EXPORT_SYMBOL_GPL(xen_have_vector_callback); + void __ref xen_hvm_init_shared_info(void) { int cpu; @@ -123,7 +126,7 @@ static int xen_cpu_up_prepare_hvm(unsigned int cpu) per_cpu(xen_vcpu_id, cpu) = cpu; xen_vcpu_setup(cpu); - if (xen_feature(XENFEAT_hvm_safe_pvclock)) + if (xen_have_vector_callback && xen_feature(XENFEAT_hvm_safe_pvclock)) xen_setup_timer(cpu); rc = xen_smp_intr_init(cpu); @@ -139,7 +142,7 @@ static int xen_cpu_dead_hvm(unsigned int cpu) { xen_smp_intr_free(cpu); - if (xen_feature(XENFEAT_hvm_safe_pvclock)) + if (xen_have_vector_callback && xen_feature(XENFEAT_hvm_safe_pvclock)) xen_teardown_timer(cpu); return 0; @@ -156,7 +159,8 @@ static void __init xen_hvm_guest_init(void) xen_panic_handler_init(); - BUG_ON(!xen_feature(XENFEAT_hvm_callback_vector)); + if (xen_feature(XENFEAT_hvm_callback_vector)) + xen_have_vector_callback = 1; xen_hvm_smp_init(); WARN_ON(xen_cpuhp_setup(xen_cpu_up_prepare_hvm, xen_cpu_dead_hvm)); @@ -189,7 +193,7 @@ bool xen_hvm_need_lapic(void) return false; if (!xen_hvm_domain()) return false; - if (xen_feature(XENFEAT_hvm_pirqs)) + if (xen_feature(XENFEAT_hvm_pirqs) && xen_have_vector_callback) return false; return true; } diff --git a/arch/x86/xen/smp_hvm.c b/arch/x86/xen/smp_hvm.c index 8bed434cd7d7..f18561bbf5c9 100644 --- a/arch/x86/xen/smp_hvm.c +++ b/arch/x86/xen/smp_hvm.c @@ -1,5 +1,7 @@ #include <asm/smp.h> +#include <xen/events.h> + #include "xen-ops.h" #include "smp.h" @@ -49,6 +51,9 @@ static void xen_hvm_cpu_die(unsigned int cpu) void __init xen_hvm_smp_init(void) { + if (!xen_have_vector_callback) + return; + smp_ops.smp_prepare_cpus = xen_hvm_smp_prepare_cpus; smp_ops.smp_send_reschedule = xen_smp_send_reschedule; smp_ops.cpu_die = xen_hvm_cpu_die; diff --git a/arch/x86/xen/time.c b/arch/x86/xen/time.c index 7a3089285c59..090c7eb4dca9 100644 --- a/arch/x86/xen/time.c +++ b/arch/x86/xen/time.c @@ -436,6 +436,14 @@ static void xen_hvm_setup_cpu_clockevents(void) void __init xen_hvm_init_time_ops(void) { + /* + * vector callback is needed otherwise we cannot receive interrupts + * on cpu > 0 and at this point we don't know how many cpus are + * available. + */ + if (!xen_have_vector_callback) + return; + if (!xen_feature(XENFEAT_hvm_safe_pvclock)) { printk(KERN_INFO "Xen doesn't support pvclock on HVM," "disable pv timer\n"); |
