Merge git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6: (46 commits)
ide: constify struct ide_dma_ops
ide: add struct ide_dma_ops (take 3)
ide: add IDE_HFLAG_SERIALIZE_DMA host flag
sl82c105: check bridge revision in sl82c105_init_one()
au1xxx-ide: use ->init_dma method
palm_bk3710: use ->init_dma method
sgiioc4: use ->init_dma method
icside: use ->init_dma method
ide-pmac: use ->init_dma method
ide: do complete DMA setup in ->init_dma method (take 2)
au1xxx-ide: fix MWDMA support
ide: cleanup ide_setup_dma()
ide: factor out setting PCI bus-mastering from ide_hwif_setup_dma()
ide: export ide_allocate_dma_engine()
ide: move ide_setup_dma() call out from ->init_dma method
alim15x3: skip DMA initialization completely on revs < 0x20
pdc202xx_old: remove init_dma_pdc202xx()
ide: don't display "BIOS" settings in ide_setup_dma()
ide: remove ->cds field from ide_hwif_t (take 2)
ide: remove ide_dma_iobase()
...
diff --git a/Documentation/i386/boot.txt b/Documentation/i386/boot.txt
index 2eb1610..0fac346 100644
--- a/Documentation/i386/boot.txt
+++ b/Documentation/i386/boot.txt
@@ -42,6 +42,8 @@
Protocol 2.06: (Kernel 2.6.22) Added a field that contains the size of
the boot command line
+Protocol 2.09: (kernel 2.6.26) Added a field of 64-bit physical
+ pointer to single linked list of struct setup_data.
**** MEMORY LAYOUT
@@ -172,6 +174,8 @@
0240/8 2.07+ hardware_subarch_data Subarchitecture-specific data
0248/4 2.08+ payload_offset Offset of kernel payload
024C/4 2.08+ payload_length Length of kernel payload
+0250/8 2.09+ setup_data 64-bit physical pointer to linked list
+ of struct setup_data
(1) For backwards compatibility, if the setup_sects field contains 0, the
real value is 4.
@@ -572,6 +576,28 @@
covered by setup_move_size, so you may need to adjust this
field.
+Field name: setup_data
+Type: write (obligatory)
+Offset/size: 0x250/8
+Protocol: 2.09+
+
+ The 64-bit physical pointer to NULL terminated single linked list of
+ struct setup_data. This is used to define a more extensible boot
+ parameters passing mechanism. The definition of struct setup_data is
+ as follow:
+
+ struct setup_data {
+ u64 next;
+ u32 type;
+ u32 len;
+ u8 data[0];
+ };
+
+ Where, the next is a 64-bit physical pointer to the next node of
+ linked list, the next field of the last node is 0; the type is used
+ to identify the contents of data; the len is the length of data
+ field; the data holds the real payload.
+
**** MEMORY LAYOUT OF THE REAL-MODE CODE
diff --git a/arch/x86/boot/header.S b/arch/x86/boot/header.S
index 6d2df8d..af86e43 100644
--- a/arch/x86/boot/header.S
+++ b/arch/x86/boot/header.S
@@ -120,7 +120,7 @@
# Part 2 of the header, from the old setup.S
.ascii "HdrS" # header signature
- .word 0x0208 # header version number (>= 0x0105)
+ .word 0x0209 # header version number (>= 0x0105)
# or else old loadlin-1.5 will fail)
.globl realmode_swtch
realmode_swtch: .word 0, 0 # default_switch, SETUPSEG
@@ -227,6 +227,10 @@
payload_offset: .long input_data
payload_length: .long input_data_end-input_data
+setup_data: .quad 0 # 64-bit physical pointer to
+ # single linked list of
+ # struct setup_data
+
# End of setup header #####################################################
.section ".inittext", "ax"
diff --git a/arch/x86/kernel/e820_64.c b/arch/x86/kernel/e820_64.c
index cbd42e5..79f0d52 100644
--- a/arch/x86/kernel/e820_64.c
+++ b/arch/x86/kernel/e820_64.c
@@ -84,6 +84,28 @@
strncpy(r->name, name, sizeof(r->name) - 1);
}
+void __init free_early(unsigned long start, unsigned long end)
+{
+ struct early_res *r;
+ int i, j;
+
+ for (i = 0; i < MAX_EARLY_RES && early_res[i].end; i++) {
+ r = &early_res[i];
+ if (start == r->start && end == r->end)
+ break;
+ }
+ if (i >= MAX_EARLY_RES || !early_res[i].end)
+ panic("free_early on not reserved area: %lx-%lx!", start, end);
+
+ for (j = i + 1; j < MAX_EARLY_RES && early_res[j].end; j++)
+ ;
+
+ memcpy(&early_res[i], &early_res[i + 1],
+ (j - 1 - i) * sizeof(struct early_res));
+
+ early_res[j - 1].end = 0;
+}
+
void __init early_res_to_bootmem(void)
{
int i;
diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c
index d31d6b7..e25c57b 100644
--- a/arch/x86/kernel/head64.c
+++ b/arch/x86/kernel/head64.c
@@ -11,6 +11,7 @@
#include <linux/string.h>
#include <linux/percpu.h>
#include <linux/start_kernel.h>
+#include <linux/io.h>
#include <asm/processor.h>
#include <asm/proto.h>
@@ -100,6 +101,24 @@
reserve_early(lowmem, 0x100000, "BIOS reserved");
}
+static void __init reserve_setup_data(void)
+{
+ struct setup_data *data;
+ unsigned long pa_data;
+ char buf[32];
+
+ if (boot_params.hdr.version < 0x0209)
+ return;
+ pa_data = boot_params.hdr.setup_data;
+ while (pa_data) {
+ data = early_ioremap(pa_data, sizeof(*data));
+ sprintf(buf, "setup data %x", data->type);
+ reserve_early(pa_data, pa_data+sizeof(*data)+data->len, buf);
+ pa_data = data->next;
+ early_iounmap(data, sizeof(*data));
+ }
+}
+
void __init x86_64_start_kernel(char * real_mode_data)
{
int i;
@@ -156,6 +175,7 @@
#endif
reserve_ebda_region();
+ reserve_setup_data();
/*
* At this point everything still needed from the boot loader
diff --git a/arch/x86/kernel/kdebugfs.c b/arch/x86/kernel/kdebugfs.c
index 7335430..c032059 100644
--- a/arch/x86/kernel/kdebugfs.c
+++ b/arch/x86/kernel/kdebugfs.c
@@ -6,23 +6,171 @@
*
* This file is released under the GPLv2.
*/
-
#include <linux/debugfs.h>
+#include <linux/uaccess.h>
#include <linux/stat.h>
#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/mm.h>
#include <asm/setup.h>
#ifdef CONFIG_DEBUG_BOOT_PARAMS
+struct setup_data_node {
+ u64 paddr;
+ u32 type;
+ u32 len;
+};
+
+static ssize_t
+setup_data_read(struct file *file, char __user *user_buf, size_t count,
+ loff_t *ppos)
+{
+ struct setup_data_node *node = file->private_data;
+ unsigned long remain;
+ loff_t pos = *ppos;
+ struct page *pg;
+ void *p;
+ u64 pa;
+
+ if (pos < 0)
+ return -EINVAL;
+ if (pos >= node->len)
+ return 0;
+
+ if (count > node->len - pos)
+ count = node->len - pos;
+ pa = node->paddr + sizeof(struct setup_data) + pos;
+ pg = pfn_to_page((pa + count - 1) >> PAGE_SHIFT);
+ if (PageHighMem(pg)) {
+ p = ioremap_cache(pa, count);
+ if (!p)
+ return -ENXIO;
+ } else {
+ p = __va(pa);
+ }
+
+ remain = copy_to_user(user_buf, p, count);
+
+ if (PageHighMem(pg))
+ iounmap(p);
+
+ if (remain)
+ return -EFAULT;
+
+ *ppos = pos + count;
+
+ return count;
+}
+
+static int setup_data_open(struct inode *inode, struct file *file)
+{
+ file->private_data = inode->i_private;
+ return 0;
+}
+
+static const struct file_operations fops_setup_data = {
+ .read = setup_data_read,
+ .open = setup_data_open,
+};
+
+static int __init
+create_setup_data_node(struct dentry *parent, int no,
+ struct setup_data_node *node)
+{
+ struct dentry *d, *type, *data;
+ char buf[16];
+ int error;
+
+ sprintf(buf, "%d", no);
+ d = debugfs_create_dir(buf, parent);
+ if (!d) {
+ error = -ENOMEM;
+ goto err_return;
+ }
+ type = debugfs_create_x32("type", S_IRUGO, d, &node->type);
+ if (!type) {
+ error = -ENOMEM;
+ goto err_dir;
+ }
+ data = debugfs_create_file("data", S_IRUGO, d, node, &fops_setup_data);
+ if (!data) {
+ error = -ENOMEM;
+ goto err_type;
+ }
+ return 0;
+
+err_type:
+ debugfs_remove(type);
+err_dir:
+ debugfs_remove(d);
+err_return:
+ return error;
+}
+
+static int __init create_setup_data_nodes(struct dentry *parent)
+{
+ struct setup_data_node *node;
+ struct setup_data *data;
+ int error, no = 0;
+ struct dentry *d;
+ struct page *pg;
+ u64 pa_data;
+
+ d = debugfs_create_dir("setup_data", parent);
+ if (!d) {
+ error = -ENOMEM;
+ goto err_return;
+ }
+
+ pa_data = boot_params.hdr.setup_data;
+
+ while (pa_data) {
+ node = kmalloc(sizeof(*node), GFP_KERNEL);
+ if (!node) {
+ error = -ENOMEM;
+ goto err_dir;
+ }
+ pg = pfn_to_page((pa_data+sizeof(*data)-1) >> PAGE_SHIFT);
+ if (PageHighMem(pg)) {
+ data = ioremap_cache(pa_data, sizeof(*data));
+ if (!data) {
+ error = -ENXIO;
+ goto err_dir;
+ }
+ } else {
+ data = __va(pa_data);
+ }
+
+ node->paddr = pa_data;
+ node->type = data->type;
+ node->len = data->len;
+ error = create_setup_data_node(d, no, node);
+ pa_data = data->next;
+
+ if (PageHighMem(pg))
+ iounmap(data);
+ if (error)
+ goto err_dir;
+ no++;
+ }
+ return 0;
+
+err_dir:
+ debugfs_remove(d);
+err_return:
+ return error;
+}
+
static struct debugfs_blob_wrapper boot_params_blob = {
- .data = &boot_params,
- .size = sizeof(boot_params),
+ .data = &boot_params,
+ .size = sizeof(boot_params),
};
static int __init boot_params_kdebugfs_init(void)
{
- int error;
struct dentry *dbp, *version, *data;
+ int error;
dbp = debugfs_create_dir("boot_params", NULL);
if (!dbp) {
@@ -41,7 +189,13 @@
error = -ENOMEM;
goto err_version;
}
+ error = create_setup_data_nodes(dbp);
+ if (error)
+ goto err_data;
return 0;
+
+err_data:
+ debugfs_remove(data);
err_version:
debugfs_remove(version);
err_dir:
@@ -61,5 +215,4 @@
return error;
}
-
arch_initcall(arch_kdebugfs_init);
diff --git a/arch/x86/kernel/setup_64.c b/arch/x86/kernel/setup_64.c
index 17bdf23..b04e2c0 100644
--- a/arch/x86/kernel/setup_64.c
+++ b/arch/x86/kernel/setup_64.c
@@ -264,6 +264,28 @@
machine_specific_memory_setup();
}
+static void __init parse_setup_data(void)
+{
+ struct setup_data *data;
+ unsigned long pa_data;
+
+ if (boot_params.hdr.version < 0x0209)
+ return;
+ pa_data = boot_params.hdr.setup_data;
+ while (pa_data) {
+ data = early_ioremap(pa_data, PAGE_SIZE);
+ switch (data->type) {
+ default:
+ break;
+ }
+#ifndef CONFIG_DEBUG_BOOT_PARAMS
+ free_early(pa_data, pa_data+sizeof(*data)+data->len);
+#endif
+ pa_data = data->next;
+ early_iounmap(data, PAGE_SIZE);
+ }
+}
+
/*
* setup_arch - architecture-specific boot-time initializations
*
@@ -316,6 +338,8 @@
strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
*cmdline_p = command_line;
+ parse_setup_data();
+
parse_early_param();
#ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c
index 9851265..e7ca7fc 100644
--- a/arch/x86/mm/pat.c
+++ b/arch/x86/mm/pat.c
@@ -16,6 +16,7 @@
#include <asm/msr.h>
#include <asm/tlbflush.h>
#include <asm/processor.h>
+#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/pat.h>
#include <asm/e820.h>
@@ -477,6 +478,33 @@
return vma_prot;
}
+#ifdef CONFIG_NONPROMISC_DEVMEM
+/* This check is done in drivers/char/mem.c in case of NONPROMISC_DEVMEM*/
+static inline int range_is_allowed(unsigned long pfn, unsigned long size)
+{
+ return 1;
+}
+#else
+static inline int range_is_allowed(unsigned long pfn, unsigned long size)
+{
+ u64 from = ((u64)pfn) << PAGE_SHIFT;
+ u64 to = from + size;
+ u64 cursor = from;
+
+ while (cursor < to) {
+ if (!devmem_is_allowed(pfn)) {
+ printk(KERN_INFO
+ "Program %s tried to access /dev/mem between %Lx->%Lx.\n",
+ current->comm, from, to);
+ return 0;
+ }
+ cursor += PAGE_SIZE;
+ pfn++;
+ }
+ return 1;
+}
+#endif /* CONFIG_NONPROMISC_DEVMEM */
+
int phys_mem_access_prot_allowed(struct file *file, unsigned long pfn,
unsigned long size, pgprot_t *vma_prot)
{
@@ -485,6 +513,9 @@
unsigned long ret_flags;
int retval;
+ if (!range_is_allowed(pfn, size))
+ return 0;
+
if (file->f_flags & O_SYNC) {
flags = _PAGE_CACHE_UC;
}
diff --git a/include/asm-x86/bootparam.h b/include/asm-x86/bootparam.h
index 5115135..e865990 100644
--- a/include/asm-x86/bootparam.h
+++ b/include/asm-x86/bootparam.h
@@ -9,6 +9,17 @@
#include <asm/ist.h>
#include <video/edid.h>
+/* setup data types */
+#define SETUP_NONE 0
+
+/* extensible setup data list node */
+struct setup_data {
+ u64 next;
+ u32 type;
+ u32 len;
+ u8 data[0];
+};
+
struct setup_header {
__u8 setup_sects;
__u16 root_flags;
@@ -46,6 +57,9 @@
__u32 cmdline_size;
__u32 hardware_subarch;
__u64 hardware_subarch_data;
+ __u32 payload_offset;
+ __u32 payload_length;
+ __u64 setup_data;
} __attribute__((packed));
struct sys_desc_table {
diff --git a/include/asm-x86/e820_64.h b/include/asm-x86/e820_64.h
index f478c57..b5e02e3 100644
--- a/include/asm-x86/e820_64.h
+++ b/include/asm-x86/e820_64.h
@@ -48,6 +48,7 @@
extern void update_e820(void);
extern void reserve_early(unsigned long start, unsigned long end, char *name);
+extern void free_early(unsigned long start, unsigned long end);
extern void early_res_to_bootmem(void);
#endif/*!__ASSEMBLY__*/