From 0459ff4873739986dccafbb417cfc69e71bdacf4 Mon Sep 17 00:00:00 2001 From: Michael Kelley Date: Sun, 26 Mar 2023 06:52:02 -0700 Subject: swiotlb: Remove bounce buffer remapping for Hyper-V With changes to how Hyper-V guest VMs flip memory between private (encrypted) and shared (decrypted), creating a second kernel virtual mapping for shared memory is no longer necessary. Everything needed for the transition to shared is handled by set_memory_decrypted(). As such, remove swiotlb_unencrypted_base and the associated code. Signed-off-by: Michael Kelley Acked-by: Christoph Hellwig Acked-by: Borislav Petkov (AMD) Link: https://lore.kernel.org/r/1679838727-87310-8-git-send-email-mikelley@microsoft.com Signed-off-by: Wei Liu --- include/linux/swiotlb.h | 2 -- 1 file changed, 2 deletions(-) (limited to 'include/linux') diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h index bcef10e20ea4..2ef25e6fa1b4 100644 --- a/include/linux/swiotlb.h +++ b/include/linux/swiotlb.h @@ -180,6 +180,4 @@ static inline bool is_swiotlb_for_alloc(struct device *dev) } #endif /* CONFIG_DMA_RESTRICTED_POOL */ -extern phys_addr_t swiotlb_unencrypted_base; - #endif /* __LINUX_SWIOTLB_H */ -- cgit v1.2.3