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dma/swiotlb: Remove swiotlb_set_mem_attributes() 

Now that set_memory_decrypted() is always available we can just call it
directly.

Tested-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Jon Mason <jdmason@kudzu.us>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Muli Ben-Yehuda <mulix@mulix.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: iommu@lists.linux-foundation.org
Link: http://lkml.kernel.org/r/20180319103826.12853-12-hch@lst.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Christoph Hellwig 2018-03-19 11:38:23 +01:00 committed by Ingo Molnar
parent b7fa07460b
commit e7de6c7cc2
3 changed files with 6 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/x86/include/asm/mem_encrypt.h
View File

@ -49,8 +49,6 @@ int __init early_set_memory_encrypted(unsigned long vaddr, unsigned long size);
/* Architecture __weak replacement functions */
void __init mem_encrypt_init(void);
void swiotlb_set_mem_attributes(void *vaddr, unsigned long size);
bool sme_active(void);
bool sev_active(void);

8
arch/x86/mm/mem_encrypt.c
View File

@ -441,11 +441,3 @@ void __init mem_encrypt_init(void)
: "Secure Memory Encryption (SME)");
}
void swiotlb_set_mem_attributes(void *vaddr, unsigned long size)
{
WARN(PAGE_ALIGN(size) != size,
"size is not page-aligned (%#lx)\n", size);
/* Make the SWIOTLB buffer area decrypted */
set_memory_decrypted((unsigned long)vaddr, size >> PAGE_SHIFT);
}

12
lib/swiotlb.c
View File

@ -31,6 +31,7 @@
#include <linux/gfp.h>
#include <linux/scatterlist.h>
#include <linux/mem_encrypt.h>
#include <linux/set_memory.h>
#include <asm/io.h>
#include <asm/dma.h>
@ -156,8 +157,6 @@ unsigned long swiotlb_size_or_default(void)
return size ? size : (IO_TLB_DEFAULT_SIZE);
}
void __weak swiotlb_set_mem_attributes(void *vaddr, unsigned long size) { }
/* For swiotlb, clear memory encryption mask from dma addresses */
static dma_addr_t swiotlb_phys_to_dma(struct device *hwdev,
phys_addr_t address)
@ -209,12 +208,12 @@ void __init swiotlb_update_mem_attributes(void)
vaddr = phys_to_virt(io_tlb_start);
bytes = PAGE_ALIGN(io_tlb_nslabs << IO_TLB_SHIFT);
swiotlb_set_mem_attributes(vaddr, bytes);
set_memory_decrypted((unsigned long)vaddr, bytes >> PAGE_SHIFT);
memset(vaddr, 0, bytes);
vaddr = phys_to_virt(io_tlb_overflow_buffer);
bytes = PAGE_ALIGN(io_tlb_overflow);
swiotlb_set_mem_attributes(vaddr, bytes);
set_memory_decrypted((unsigned long)vaddr, bytes >> PAGE_SHIFT);
memset(vaddr, 0, bytes);
}
@ -355,7 +354,7 @@ swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs)
io_tlb_start = virt_to_phys(tlb);
io_tlb_end = io_tlb_start + bytes;
swiotlb_set_mem_attributes(tlb, bytes);
set_memory_decrypted((unsigned long)tlb, bytes >> PAGE_SHIFT);
memset(tlb, 0, bytes);
/*
@ -366,7 +365,8 @@ swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs)
if (!v_overflow_buffer)
goto cleanup2;
swiotlb_set_mem_attributes(v_overflow_buffer, io_tlb_overflow);
set_memory_decrypted((unsigned long)v_overflow_buffer,
io_tlb_overflow >> PAGE_SHIFT);
memset(v_overflow_buffer, 0, io_tlb_overflow);
io_tlb_overflow_buffer = virt_to_phys(v_overflow_buffer);