Message ID | 1480960154-211541-3-git-send-email-athorlton@sgi.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show |
On 05/12/16 18:49, Alex Thorlton wrote: > On systems with sufficiently large e820 tables, and several IOAPICs, it > is possible for the XENMEM_machine_memory_map callback (and its > counterpart, XENMEM_memory_map) to attempt to return an e820 table with > more than 128 entries. This callback adds entries to the BIOS-provided > e820 table to account for IOAPIC registers, which, on sufficiently large > systems, can result in an e820 table that is too large to copy back into > xen_e820_map. > > This change simply increases the size of xen_e820_map to E820_X_MAX to > ensure that there is enough room to store the entire e820 map returned > from this callback. > > Signed-off-by: Alex Thorlton <athorlton@sgi.com> > Suggested-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> > Reviewed-by: Juergen Gross <jgross@suse.com> Commited to xen/tip.git for-linus-4.10 Juergen
diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c index f8960fc..8c394e3 100644 --- a/arch/x86/xen/setup.c +++ b/arch/x86/xen/setup.c @@ -41,7 +41,7 @@ unsigned long xen_released_pages; /* E820 map used during setting up memory. */ -static struct e820entry xen_e820_map[E820MAX] __initdata; +static struct e820entry xen_e820_map[E820_X_MAX] __initdata; static u32 xen_e820_map_entries __initdata; /* @@ -750,7 +750,7 @@ char * __init xen_memory_setup(void) max_pfn = min(max_pfn, xen_start_info->nr_pages); mem_end = PFN_PHYS(max_pfn); - memmap.nr_entries = E820MAX; + memmap.nr_entries = ARRAY_SIZE(xen_e820_map); set_xen_guest_handle(memmap.buffer, xen_e820_map); op = xen_initial_domain() ? @@ -923,7 +923,7 @@ char * __init xen_auto_xlated_memory_setup(void) int i; int rc; - memmap.nr_entries = E820MAX; + memmap.nr_entries = ARRAY_SIZE(xen_e820_map); set_xen_guest_handle(memmap.buffer, xen_e820_map); rc = HYPERVISOR_memory_op(XENMEM_memory_map, &memmap);