diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/xen/balloon.c | 12 | ||||
| -rw-r--r-- | drivers/xen/events.c | 4 |
2 files changed, 12 insertions, 4 deletions
diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c index 2b17ad5b4b3..43f9f02c7db 100644 --- a/drivers/xen/balloon.c +++ b/drivers/xen/balloon.c @@ -412,8 +412,16 @@ static int __init balloon_init(void) register_balloon(&balloon_sysdev); - /* Initialise the balloon with excess memory space. */ - extra_pfn_end = min(e820_end_of_ram_pfn(), + /* + * Initialise the balloon with excess memory space. We need + * to make sure we don't add memory which doesn't exist or + * logically exist. The E820 map can be trimmed to be smaller + * than the amount of physical memory due to the mem= command + * line parameter. And if this is a 32-bit non-HIGHMEM kernel + * on a system with memory which requires highmem to access, + * don't try to use it. + */ + extra_pfn_end = min(min(max_pfn, e820_end_of_ram_pfn()), (unsigned long)PFN_DOWN(xen_extra_mem_start + xen_extra_mem_size)); for (pfn = PFN_UP(xen_extra_mem_start); pfn < extra_pfn_end; diff --git a/drivers/xen/events.c b/drivers/xen/events.c index 2811bb988ea..0009e489272 100644 --- a/drivers/xen/events.c +++ b/drivers/xen/events.c @@ -423,7 +423,7 @@ static int find_unbound_irq(void) if (irq == start) goto no_irqs; - res = irq_alloc_desc_at(irq, 0); + res = irq_alloc_desc_at(irq, -1); if (WARN_ON(res != irq)) return -1; @@ -630,7 +630,7 @@ int xen_map_pirq_gsi(unsigned pirq, unsigned gsi, int shareable, char *name) if (identity_mapped_irq(gsi) || (!xen_initial_domain() && xen_pv_domain())) { irq = gsi; - irq_alloc_desc_at(irq, 0); + irq_alloc_desc_at(irq, -1); } else irq = find_unbound_irq(); |