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xen/events: only register debug interrupt for 2-level events

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[ Upstream commit d04b1ae5a9 ]

xen_debug_interrupt() is specific to 2-level event handling. So don't
register it with fifo event handling being active.

Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Link: https://lore.kernel.org/r/20201022094907.28560-4-jgross@suse.com
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Stable-dep-of: 69143f6086 ("x86/xen: Fix memory leak in xen_smp_intr_init{_pv}()")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Juergen Gross 2020-10-22 11:49:05 +02:00 committed by Greg Kroah-Hartman
parent 314d510535
commit 6e98158d97
3 changed files with 19 additions and 12 deletions
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19
arch/x86/xen/smp.c
View file

@ -88,14 +88,17 @@ int xen_smp_intr_init(unsigned int cpu)
per_cpu(xen_callfunc_irq, cpu).irq = rc;
per_cpu(xen_callfunc_irq, cpu).name = callfunc_name;
debug_name = kasprintf(GFP_KERNEL, "debug%d", cpu);
rc = bind_virq_to_irqhandler(VIRQ_DEBUG, cpu, xen_debug_interrupt,
IRQF_PERCPU | IRQF_NOBALANCING,
debug_name, NULL);
if (rc < 0)
goto fail;
per_cpu(xen_debug_irq, cpu).irq = rc;
per_cpu(xen_debug_irq, cpu).name = debug_name;
if (!xen_fifo_events) {
debug_name = kasprintf(GFP_KERNEL, "debug%d", cpu);
rc = bind_virq_to_irqhandler(VIRQ_DEBUG, cpu,
xen_debug_interrupt,
IRQF_PERCPU | IRQF_NOBALANCING,
debug_name, NULL);
if (rc < 0)
goto fail;
per_cpu(xen_debug_irq, cpu).irq = rc;
per_cpu(xen_debug_irq, cpu).name = debug_name;
}
callfunc_name = kasprintf(GFP_KERNEL, "callfuncsingle%d", cpu);
rc = bind_ipi_to_irqhandler(XEN_CALL_FUNCTION_SINGLE_VECTOR,

2
arch/x86/xen/xen-ops.h
View file

@ -30,6 +30,8 @@ extern struct start_info *xen_start_info;
extern struct shared_info xen_dummy_shared_info;
extern struct shared_info *HYPERVISOR_shared_info;
extern bool xen_fifo_events;
void xen_setup_mfn_list_list(void);
void xen_build_mfn_list_list(void);
void xen_setup_machphys_mapping(void);

10
drivers/xen/events/events_base.c
View file

@ -2101,8 +2101,8 @@ void xen_callback_vector(void)
void xen_callback_vector(void) {}
#endif
static bool fifo_events = true;
module_param(fifo_events, bool, 0);
bool xen_fifo_events = true;
module_param_named(fifo_events, xen_fifo_events, bool, 0);
static int xen_evtchn_cpu_prepare(unsigned int cpu)
{
@ -2131,10 +2131,12 @@ void __init xen_init_IRQ(void)
int ret = -EINVAL;
unsigned int evtchn;
if (fifo_events)
if (xen_fifo_events)
ret = xen_evtchn_fifo_init();
if (ret < 0)
if (ret < 0) {
xen_evtchn_2l_init();
xen_fifo_events = false;
}
xen_cpu_init_eoi(smp_processor_id());