diff options
Diffstat (limited to 'arch/s390/include/asm/msi.h')
| -rw-r--r-- | arch/s390/include/asm/msi.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/s390/include/asm/msi.h b/arch/s390/include/asm/msi.h new file mode 100644 index 000000000..399343ed9 --- /dev/null +++ b/arch/s390/include/asm/msi.h @@ -0,0 +1,17 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_S390_MSI_H +#define _ASM_S390_MSI_H +#include <asm-generic/msi.h> + +/* + * Work around S390 not using irq_domain at all so we can't set + * IRQ_DOMAIN_FLAG_ISOLATED_MSI. See for an explanation how it works: + * + * https://lore.kernel.org/r/31af8174-35e9-ebeb-b9ef-74c90d4bfd93@linux.ibm.com/ + * + * Note this is less isolated than the ARM/x86 versions as userspace can trigger + * MSI belonging to kernel devices within the same gisa. + */ +#define arch_is_isolated_msi() true + +#endif |