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authorJuergen Gross <jgross@suse.com>2023-11-24 08:48:52 +0100
committerJuergen Gross <jgross@suse.com>2023-11-28 12:47:11 +0100
commitdb2832309a82b9acc4b8cc33a1831d36507ec13e (patch)
tree372b03193c3333e5cef2b001c67adcca0944c189 /scripts/checkpatch.pl
parentarm/xen: fix xen_vcpu_info allocation alignment (diff)
downloadlinux-db2832309a82b9acc4b8cc33a1831d36507ec13e.tar.xz
linux-db2832309a82b9acc4b8cc33a1831d36507ec13e.zip
x86/xen: fix percpu vcpu_info allocation
Today the percpu struct vcpu_info is allocated via DEFINE_PER_CPU(), meaning that it could cross a page boundary. In this case registering it with the hypervisor will fail, resulting in a panic(). This can easily be fixed by using DEFINE_PER_CPU_ALIGNED() instead, as struct vcpu_info is guaranteed to have a size of 64 bytes, matching the cache line size of x86 64-bit processors (Xen doesn't support 32-bit processors). Fixes: 5ead97c84fa7 ("xen: Core Xen implementation") Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.con> Link: https://lore.kernel.org/r/20231124074852.25161-1-jgross@suse.com Signed-off-by: Juergen Gross <jgross@suse.com>
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