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authorRichard Levitte <levitte@openssl.org>2015-09-04 12:49:06 +0200
committerRichard Levitte <levitte@openssl.org>2015-09-06 01:35:54 +0200
commitbdd58d98467e9f0f6635c1628e1eae304383afb1 (patch)
tree1927fc4a65f8fd8b5705c5c5e0278beabf2c2b28 /apps/pkeyutl.c
parentd303b9d85e1888494785f87ebd9bd233e63564a9 (diff)
Change the way apps open their input and output files
The different apps had the liberty to decide whether they would open their input and output files in binary mode or not, which could be confusing if two different apps were handling the same type of file in different ways. The solution is to centralise the decision of low level file organisation, and that the apps would use a selection of formats to state the intent of the file. Reviewed-by: Tim Hudson <tjh@openssl.org>
Diffstat (limited to 'apps/pkeyutl.c')
-rw-r--r--apps/pkeyutl.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/apps/pkeyutl.c b/apps/pkeyutl.c
index 741dd642b1..c3e18895a7 100644
--- a/apps/pkeyutl.c
+++ b/apps/pkeyutl.c
@@ -249,11 +249,11 @@ int pkeyutl_main(int argc, char **argv)
app_RAND_load_file(NULL, 0);
if (pkey_op != EVP_PKEY_OP_DERIVE) {
- in = bio_open_default(infile, "rb");
+ in = bio_open_default(infile, 'r', FORMAT_BINARY);
if (in == NULL)
goto end;
}
- out = bio_open_default(outfile, "wb");
+ out = bio_open_default(outfile, 'w', FORMAT_BINARY);
if (out == NULL)
goto end;
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-19 03:02:46 +0000
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/*
 *  Copyright 2010
 *  by Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
 *
 * This code provides a IOMMU for Xen PV guests with PCI passthrough.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License v2.0 as published by
 * the Free Software Foundation
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * PV guests under Xen are running in an non-contiguous memory architecture.
 *
 * When PCI pass-through is utilized, this necessitates an IOMMU for
 * translating bus (DMA) to virtual and vice-versa and also providing a
 * mechanism to have contiguous pages for device drivers operations (say DMA
 * operations).
 *
 * Specifically, under Xen the Linux idea of pages is an illusion. It
 * assumes that pages start at zero and go up to the available memory. To
 * help with that, the Linux Xen MMU provides a lookup mechanism to
 * translate the page frame numbers (PFN) to machine frame numbers (MFN)
 * and vice-versa. The MFN are the "real" frame numbers. Furthermore
 * memory is not contiguous. Xen hypervisor stitches memory for guests
 * from different pools, which means there is no guarantee that PFN==MFN
 * and PFN+1==MFN+1. Lastly with Xen 4.0, pages (in debug mode) are
 * allocated in descending order (high to low), meaning the guest might
 * never get any MFN's under the 4GB mark.
 *
 */

#define pr_fmt(fmt) "xen:" KBUILD_MODNAME ": " fmt

#include <linux/bootmem.h>
#include <linux/dma-mapping.h>
#include <linux/export.h>
#include <xen/swiotlb-xen.h>
#include <xen/page.h>
#include <xen/xen-ops.h>
#include <xen/hvc-console.h>
#include <asm/dma-mapping.h>
#include <asm/xen/page-coherent.h>
/*
 * Used to do a quick range check in swiotlb_tbl_unmap_single and
 * swiotlb_tbl_sync_single_*, to see if the memory was in fact allocated by this
 * API.
 */

#ifndef CONFIG_X86
static unsigned long dma_alloc_coherent_mask(struct device *dev,
					    gfp_t gfp)
{
	unsigned long dma_mask = 0;

	dma_mask = dev->coherent_dma_mask;
	if (!dma_mask)
		dma_mask = (gfp & GFP_DMA) ? DMA_BIT_MASK(24) : DMA_BIT_MASK(32);

	return dma_mask;
}
#endif

static char *xen_io_tlb_start, *xen_io_tlb_end;
static unsigned long xen_io_tlb_nslabs;
/*
 * Quick lookup value of the bus address of the IOTLB.
 */

static u64 start_dma_addr;

static dma_addr_t xen_phys_to_bus(phys_addr_t paddr)
{
	return phys_to_machine(XPADDR(paddr)).maddr;
}

static phys_addr_t xen_bus_to_phys(dma_addr_t baddr)
{
	return machine_to_phys(XMADDR(baddr)).paddr;
}

static dma_addr_t xen_virt_to_bus(void *address)
{
	return xen_phys_to_bus(virt_to_phys(address));
}

static int check_pages_physically_contiguous(unsigned long pfn,
					     unsigned int offset,
					     size_t length)
{
	unsigned long next_mfn;
	int i;
	int nr_pages;

	next_mfn = pfn_to_mfn(pfn);
	nr_pages = (offset + length + PAGE_SIZE-1) >> PAGE_SHIFT;

	for (i = 1; i < nr_pages; i++) {
		if (pfn_to_mfn(++pfn) != ++next_mfn)
			return 0;
	}
	return 1;
}

static int range_straddles_page_boundary(phys_addr_t p, size_t size)
{
	unsigned long pfn = PFN_DOWN(p);
	unsigned int offset = p & ~PAGE_MASK;

	if (offset + size <= PAGE_SIZE)
		return 0;
	if (check_pages_physically_contiguous(pfn, offset, size))
		return 0;
	return 1;
}

static int is_xen_swiotlb_buffer(dma_addr_t dma_addr)
{
	unsigned long mfn = PFN_DOWN(dma_addr);
	unsigned long pfn = mfn_to_local_pfn(mfn);
	phys_addr_t paddr;

	/* If the address is outside our domain, it CAN
	 * have the same virtual address as another address
	 * in our domain. Therefore _only_ check address within our domain.
	 */
	if (pfn_valid(pfn)) {
		paddr = PFN_PHYS(pfn);
		return paddr >= virt_to_phys(xen_io_tlb_start) &&
		       paddr < virt_to_phys(xen_io_tlb_end);
	}
	return 0;
}

static int max_dma_bits = 32;

static int
xen_swiotlb_fixup(void *buf, size_t size, unsigned long nslabs)
{
	int i, rc;
	int dma_bits;
	dma_addr_t dma_handle;
	phys_addr_t p = virt_to_phys(buf);

	dma_bits = get_order(IO_TLB_SEGSIZE << IO_TLB_SHIFT) + PAGE_SHIFT;

	i = 0;
	do {
		int slabs = min(nslabs - i, (unsigned long)IO_TLB_SEGSIZE);

		do {
			rc = xen_create_contiguous_region(
				p + (i << IO_TLB_SHIFT),
				get_order(slabs << IO_TLB_SHIFT),
				dma_bits, &dma_handle);
		} while (rc && dma_bits++ < max_dma_bits);
		if (rc)
			return rc;

		i += slabs;
	} while (i < nslabs);
	return 0;
}
static unsigned long xen_set_nslabs(unsigned long nr_tbl)
{
	if (!nr_tbl) {
		xen_io_tlb_nslabs = (64 * 1024 * 1024 >> IO_TLB_SHIFT);
		xen_io_tlb_nslabs = ALIGN(xen_io_tlb_nslabs, IO_TLB_SEGSIZE);
	} else
		xen_io_tlb_nslabs = nr_tbl;

	return xen_io_tlb_nslabs << IO_TLB_SHIFT;
}

enum xen_swiotlb_err {
	XEN_SWIOTLB_UNKNOWN = 0,
	XEN_SWIOTLB_ENOMEM,
	XEN_SWIOTLB_EFIXUP
};

static const char *xen_swiotlb_error(enum xen_swiotlb_err err)
{
	switch (err) {
	case XEN_SWIOTLB_ENOMEM:
		return "Cannot allocate Xen-SWIOTLB buffer\n";
	case XEN_SWIOTLB_EFIXUP:
		return "Failed to get contiguous memory for DMA from Xen!\n"\
		    "You either: don't have the permissions, do not have"\
		    " enough free memory under 4GB, or the hypervisor memory"\
		    " is too fragmented!";
	default:
		break;
	}
	return "";
}
int __ref xen_swiotlb_init(int verbose, bool early)
{
	unsigned long bytes, order;
	int rc = -ENOMEM;
	enum xen_swiotlb_err m_ret = XEN_SWIOTLB_UNKNOWN;
	unsigned int repeat = 3;

	xen_io_tlb_nslabs = swiotlb_nr_tbl();
retry:
	bytes = xen_set_nslabs(xen_io_tlb_nslabs);
	order = get_order(xen_io_tlb_nslabs << IO_TLB_SHIFT);
	/*
	 * Get IO TLB memory from any location.
	 */
	if (early)
		xen_io_tlb_start = alloc_bootmem_pages(PAGE_ALIGN(bytes));
	else {
#define SLABS_PER_PAGE (1 << (PAGE_SHIFT - IO_TLB_SHIFT))
#define IO_TLB_MIN_SLABS ((1<<20) >> IO_TLB_SHIFT)
		while ((SLABS_PER_PAGE << order) > IO_TLB_MIN_SLABS) {
			xen_io_tlb_start = (void *)__get_free_pages(__GFP_NOWARN, order);
			if (xen_io_tlb_start)
				break;
			order--;
		}
		if (order != get_order(bytes)) {
			pr_warn("Warning: only able to allocate %ld MB for software IO TLB\n",
				(PAGE_SIZE << order) >> 20);
			xen_io_tlb_nslabs = SLABS_PER_PAGE << order;
			bytes = xen_io_tlb_nslabs << IO_TLB_SHIFT;
		}
	}
	if (!xen_io_tlb_start) {
		m_ret = XEN_SWIOTLB_ENOMEM;
		goto error;
	}
	xen_io_tlb_end = xen_io_tlb_start + bytes;
	/*
	 * And replace that memory with pages under 4GB.
	 */
	rc = xen_swiotlb_fixup(xen_io_tlb_start,
			       bytes,
			       xen_io_tlb_nslabs);
	if (rc) {
		if (early)
			free_bootmem(__pa(xen_io_tlb_start), PAGE_ALIGN(bytes));
		else {