On 2020-08-21 14:05, Cornelia Huck wrote:
On Wed, 19 Aug 2020 18:23:18 +0200
Pierre Morel <pmo...@linux.ibm.com> wrote:

If protected virtualization is active on s390, VIRTIO has retricted

s/retricted/only restricted/

access to the guest memory.
Define CONFIG_ARCH_HAS_RESTRICTED_VIRTIO_MEMORY_ACCESS and export
arch_has_restricted_virtio_memory_access to advertize VIRTIO if that's
the case, preventing a host error on access attempt.

Signed-off-by: Pierre Morel <pmo...@linux.ibm.com>
---
  arch/s390/Kconfig   |  1 +
  arch/s390/mm/init.c | 11 +++++++++++
  2 files changed, 12 insertions(+)

(...)

diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c
index 6dc7c3b60ef6..8febd73ed6ca 100644
--- a/arch/s390/mm/init.c
+++ b/arch/s390/mm/init.c
@@ -45,6 +45,7 @@
  #include <asm/kasan.h>
  #include <asm/dma-mapping.h>
  #include <asm/uv.h>
+#include <linux/virtio_config.h>

I don't think you need this include anymore.

right,

pgd_t swapper_pg_dir[PTRS_PER_PGD] __section(.bss..swapper_pg_dir);

(...)

With the nit fixed,

Reviewed-by: Cornelia Huck <coh...@redhat.com>


Thanks,

Pierre

--
Pierre Morel
IBM Lab Boeblingen
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