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| author | Juergen Gross <jgross@suse.com> | 2023-11-24 08:48:52 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-12-08 08:51:20 +0100 |
| commit | b3b839fb636b0983a0064d3cb97853962a0ac59e (patch) | |
| tree | 2d0e86497e5e2f998419c24c108fb9ebf90313c5 /kernel/irq/msi.c | |
| parent | 00bc8b2cf44cc59c1177a167b2551294c6ed91eb (diff) | |
x86/xen: fix percpu vcpu_info allocation
[ Upstream commit db2832309a82b9acc4b8cc33a1831d36507ec13e ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'kernel/irq/msi.c')
0 files changed, 0 insertions, 0 deletions