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| author | Juergen Gross <jgross@suse.com> | 2022-06-22 08:38:36 +0200 |
|---|---|---|
| committer | Juergen Gross <jgross@suse.com> | 2022-08-01 07:42:49 +0200 |
| commit | a603002eea8213eec5211be5a85db8340aea06d0 (patch) | |
| tree | 5154e240ad4f487a866e74a055671d66b8b12b6d /arch/s390/mm/init.c | |
| parent | 8441dac05e7f346abc4f63a15d4af0adeabfaa9b (diff) | |
| download | lwn-a603002eea8213eec5211be5a85db8340aea06d0.tar.gz lwn-a603002eea8213eec5211be5a85db8340aea06d0.zip | |
virtio: replace restricted mem access flag with callback
Instead of having a global flag to require restricted memory access
for all virtio devices, introduce a callback which can select that
requirement on a per-device basis.
For convenience add a common function returning always true, which can
be used for use cases like SEV.
Per default use a callback always returning false.
As the callback needs to be set in early init code already, add a
virtio anchor which is builtin in case virtio is enabled.
Signed-off-by: Juergen Gross <jgross@suse.com>
Tested-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com> # Arm64 guest using Xen
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Link: https://lore.kernel.org/r/20220622063838.8854-2-jgross@suse.com
Signed-off-by: Juergen Gross <jgross@suse.com>
Diffstat (limited to 'arch/s390/mm/init.c')
| -rw-r--r-- | arch/s390/mm/init.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c index 6a0ac00d5a42..4a154a084966 100644 --- a/arch/s390/mm/init.c +++ b/arch/s390/mm/init.c @@ -31,7 +31,6 @@ #include <linux/cma.h> #include <linux/gfp.h> #include <linux/dma-direct.h> -#include <linux/platform-feature.h> #include <asm/processor.h> #include <linux/uaccess.h> #include <asm/pgalloc.h> @@ -48,6 +47,7 @@ #include <asm/kasan.h> #include <asm/dma-mapping.h> #include <asm/uv.h> +#include <linux/virtio_anchor.h> #include <linux/virtio_config.h> pgd_t swapper_pg_dir[PTRS_PER_PGD] __section(".bss..swapper_pg_dir"); @@ -175,7 +175,7 @@ static void pv_init(void) if (!is_prot_virt_guest()) return; - platform_set(PLATFORM_VIRTIO_RESTRICTED_MEM_ACCESS); + virtio_set_mem_acc_cb(virtio_require_restricted_mem_acc); /* make sure bounce buffers are shared */ swiotlb_init(true, SWIOTLB_FORCE | SWIOTLB_VERBOSE); |