x86/xen: ignore error to fetch memory map in xen_arch_init_physmem()

Some implementations of Xen don't expose the XENMEM_memory_map hypercall.
Shallow the error from XENMEM_memory_map in xen_arch_init_physmem() and just
return 0. This will fallback to using the non-arch specific mechanism for
allocating scratch space.

Reported by:	cperciva
Reviewed by:	Elliott Mitchell
Fixes:	69c47485b5 ('x86/xen: use UNUSABLE e820 regions for external mappings')
Sponsored by:	Cloud Software Group
Differential revision:	https://reviews.freebsd.org/D46205

This commit is contained in:

Roger Pau Monné

2024-08-02 20:10:38 -07:00

committed by

Colin Percival

parent b45d64fd0c

commit c1287a3bb1

1 changed files with 1 additions and 1 deletions

									
										sys/x86/xen/hvm.c
									
		+1
		-1
	
												View File
												
				@@ -563,7 +563,7 @@ xen_arch_init_physmem(device_t dev, struct rman *mem)

					set_xen_guest_handle(memmap.buffer, smap);

					error = HYPERVISOR_memory_op(XENMEM_memory_map, &memmap);

					if (error != 0)

						return (error);

						return (0);

					/*

					 * Fill with UNUSABLE regions, as it's always fine to use those for