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| author | Juergen Gross <jgross@suse.com> | 2022-06-22 09:38:36 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-08-17 16:15:41 +0300 |
| commit | e5f57aaccbd3e17e9c0c2080cc4193221230868b (patch) | |
| tree | 3ea19511c2da7d192a819400107b1305b340c5e7 /arch/x86/mm/mem_encrypt_amd.c | |
| parent | b737d48db8fe1887a77d61998a8219583183a2ef (diff) | |
| download | linux-e5f57aaccbd3e17e9c0c2080cc4193221230868b.tar.xz | |
virtio: replace restricted mem access flag with callback
[ Upstream commit a603002eea8213eec5211be5a85db8340aea06d0 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'arch/x86/mm/mem_encrypt_amd.c')
| -rw-r--r-- | arch/x86/mm/mem_encrypt_amd.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/mm/mem_encrypt_amd.c b/arch/x86/mm/mem_encrypt_amd.c index f6d038e2cd8e..97452688f99f 100644 --- a/arch/x86/mm/mem_encrypt_amd.c +++ b/arch/x86/mm/mem_encrypt_amd.c @@ -20,8 +20,8 @@ #include <linux/bitops.h> #include <linux/dma-mapping.h> #include <linux/virtio_config.h> +#include <linux/virtio_anchor.h> #include <linux/cc_platform.h> -#include <linux/platform-feature.h> #include <asm/tlbflush.h> #include <asm/fixmap.h> @@ -245,7 +245,7 @@ void __init sev_setup_arch(void) swiotlb_adjust_size(size); /* Set restricted memory access for virtio. */ - platform_set(PLATFORM_VIRTIO_RESTRICTED_MEM_ACCESS); + virtio_set_mem_acc_cb(virtio_require_restricted_mem_acc); } static unsigned long pg_level_to_pfn(int level, pte_t *kpte, pgprot_t *ret_prot) |