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Note that the usage of alloc_color_heap_page() is selected at boot time, and it's a system wide decision. Once enabled all domains will use alloc_color_heap_page() for allocations, which ignores any outstanding claims. The hypercall can be enabled if/when LLC coloring is adjusted to support claims. Fixes: 95debe51a936 ("xen: add cache coloring allocator for domains") Signed-off-by: Roger Pau Monn=C3=A9 Reviewed-by: Andrew Cooper --- xen/common/memory.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/xen/common/memory.c b/xen/common/memory.c index ae805ccbe4d1..3d978227276a 100644 --- a/xen/common/memory.c +++ b/xen/common/memory.c @@ -1660,6 +1660,9 @@ long do_memory_op(unsigned long cmd, XEN_GUEST_HANDLE= _PARAM(void) arg) break; =20 case XENMEM_claim_pages: + if ( llc_coloring_enabled ) + return -EOPNOTSUPP; + if ( unlikely(start_extent) ) return -EINVAL; =20 --=20 2.51.0