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-rw-r--r--arch/ia64/Makefile4
-rw-r--r--arch/ia64/ia32/sys_ia32.c16
-rw-r--r--arch/ia64/kernel/efi.c160
-rw-r--r--arch/ia64/kernel/entry.S1
-rw-r--r--arch/ia64/kernel/head.S2
-rw-r--r--arch/ia64/kernel/ia64_ksyms.c2
-rw-r--r--arch/ia64/kernel/ptrace.c9
-rw-r--r--arch/ia64/oprofile/backtrace.c2
8 files changed, 121 insertions, 75 deletions
diff --git a/arch/ia64/Makefile b/arch/ia64/Makefile
index 67932ad5308..57b047c27e4 100644
--- a/arch/ia64/Makefile
+++ b/arch/ia64/Makefile
@@ -37,10 +37,6 @@ $(error Sorry, you need a newer version of the assember, one that is built from
ftp://ftp.hpl.hp.com/pub/linux-ia64/gas-030124.tar.gz)
endif
-ifneq ($(shell if [ $(GCC_VERSION) -lt 0300 ] ; then echo "bad"; fi ;),)
-$(error Sorry, your compiler is too old. GCC v2.96 is known to generate bad code.)
-endif
-
ifeq ($(GCC_VERSION),0304)
cflags-$(CONFIG_ITANIUM) += -mtune=merced
cflags-$(CONFIG_MCKINLEY) += -mtune=mckinley
diff --git a/arch/ia64/ia32/sys_ia32.c b/arch/ia64/ia32/sys_ia32.c
index dc282710421..9f8e8d55887 100644
--- a/arch/ia64/ia32/sys_ia32.c
+++ b/arch/ia64/ia32/sys_ia32.c
@@ -1761,21 +1761,15 @@ sys32_ptrace (int request, pid_t pid, unsigned int addr, unsigned int data)
lock_kernel();
if (request == PTRACE_TRACEME) {
- ret = sys_ptrace(request, pid, addr, data);
+ ret = ptrace_traceme();
goto out;
}
- ret = -ESRCH;
- read_lock(&tasklist_lock);
- child = find_task_by_pid(pid);
- if (child)
- get_task_struct(child);
- read_unlock(&tasklist_lock);
- if (!child)
+ child = ptrace_get_task_struct(pid);
+ if (IS_ERR(child)) {
+ ret = PTR_ERR(child);
goto out;
- ret = -EPERM;
- if (pid == 1) /* no messing around with init! */
- goto out_tsk;
+ }
if (request == PTRACE_ATTACH) {
ret = sys_ptrace(request, pid, addr, data);
diff --git a/arch/ia64/kernel/efi.c b/arch/ia64/kernel/efi.c
index a3aa45cbcfa..c485a3b32ba 100644
--- a/arch/ia64/kernel/efi.c
+++ b/arch/ia64/kernel/efi.c
@@ -247,6 +247,32 @@ typedef struct kern_memdesc {
static kern_memdesc_t *kern_memmap;
+#define efi_md_size(md) (md->num_pages << EFI_PAGE_SHIFT)
+
+static inline u64
+kmd_end(kern_memdesc_t *kmd)
+{
+ return (kmd->start + (kmd->num_pages << EFI_PAGE_SHIFT));
+}
+
+static inline u64
+efi_md_end(efi_memory_desc_t *md)
+{
+ return (md->phys_addr + efi_md_size(md));
+}
+
+static inline int
+efi_wb(efi_memory_desc_t *md)
+{
+ return (md->attribute & EFI_MEMORY_WB);
+}
+
+static inline int
+efi_uc(efi_memory_desc_t *md)
+{
+ return (md->attribute & EFI_MEMORY_UC);
+}
+
static void
walk (efi_freemem_callback_t callback, void *arg, u64 attr)
{
@@ -595,8 +621,8 @@ efi_get_iobase (void)
return 0;
}
-u32
-efi_mem_type (unsigned long phys_addr)
+static efi_memory_desc_t *
+efi_memory_descriptor (unsigned long phys_addr)
{
void *efi_map_start, *efi_map_end, *p;
efi_memory_desc_t *md;
@@ -610,13 +636,13 @@ efi_mem_type (unsigned long phys_addr)
md = p;
if (phys_addr - md->phys_addr < (md->num_pages << EFI_PAGE_SHIFT))
- return md->type;
+ return md;
}
return 0;
}
-u64
-efi_mem_attributes (unsigned long phys_addr)
+static int
+efi_memmap_has_mmio (void)
{
void *efi_map_start, *efi_map_end, *p;
efi_memory_desc_t *md;
@@ -629,36 +655,98 @@ efi_mem_attributes (unsigned long phys_addr)
for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
md = p;
- if (phys_addr - md->phys_addr < (md->num_pages << EFI_PAGE_SHIFT))
- return md->attribute;
+ if (md->type == EFI_MEMORY_MAPPED_IO)
+ return 1;
}
return 0;
}
+
+u32
+efi_mem_type (unsigned long phys_addr)
+{
+ efi_memory_desc_t *md = efi_memory_descriptor(phys_addr);
+
+ if (md)
+ return md->type;
+ return 0;
+}
+
+u64
+efi_mem_attributes (unsigned long phys_addr)
+{
+ efi_memory_desc_t *md = efi_memory_descriptor(phys_addr);
+
+ if (md)
+ return md->attribute;
+ return 0;
+}
EXPORT_SYMBOL(efi_mem_attributes);
+/*
+ * Determines whether the memory at phys_addr supports the desired
+ * attribute (WB, UC, etc). If this returns 1, the caller can safely
+ * access *size bytes at phys_addr with the specified attribute.
+ */
+static int
+efi_mem_attribute_range (unsigned long phys_addr, unsigned long *size, u64 attr)
+{
+ efi_memory_desc_t *md = efi_memory_descriptor(phys_addr);
+ unsigned long md_end;
+
+ if (!md || (md->attribute & attr) != attr)
+ return 0;
+
+ do {
+ md_end = efi_md_end(md);
+ if (phys_addr + *size <= md_end)
+ return 1;
+
+ md = efi_memory_descriptor(md_end);
+ if (!md || (md->attribute & attr) != attr) {
+ *size = md_end - phys_addr;
+ return 1;
+ }
+ } while (md);
+ return 0;
+}
+
+/*
+ * For /dev/mem, we only allow read & write system calls to access
+ * write-back memory, because read & write don't allow the user to
+ * control access size.
+ */
int
valid_phys_addr_range (unsigned long phys_addr, unsigned long *size)
{
- void *efi_map_start, *efi_map_end, *p;
- efi_memory_desc_t *md;
- u64 efi_desc_size;
+ return efi_mem_attribute_range(phys_addr, size, EFI_MEMORY_WB);
+}
- efi_map_start = __va(ia64_boot_param->efi_memmap);
- efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
- efi_desc_size = ia64_boot_param->efi_memdesc_size;
+/*
+ * We allow mmap of anything in the EFI memory map that supports
+ * either write-back or uncacheable access. For uncacheable regions,
+ * the supported access sizes are system-dependent, and the user is
+ * responsible for using the correct size.
+ *
+ * Note that this doesn't currently allow access to hot-added memory,
+ * because that doesn't appear in the boot-time EFI memory map.
+ */
+int
+valid_mmap_phys_addr_range (unsigned long phys_addr, unsigned long *size)
+{
+ if (efi_mem_attribute_range(phys_addr, size, EFI_MEMORY_WB))
+ return 1;
- for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
- md = p;
+ if (efi_mem_attribute_range(phys_addr, size, EFI_MEMORY_UC))
+ return 1;
- if (phys_addr - md->phys_addr < (md->num_pages << EFI_PAGE_SHIFT)) {
- if (!(md->attribute & EFI_MEMORY_WB))
- return 0;
+ /*
+ * Some firmware doesn't report MMIO regions in the EFI memory map.
+ * The Intel BigSur (a.k.a. HP i2000) has this problem. In this
+ * case, we can't use the EFI memory map to validate mmap requests.
+ */
+ if (!efi_memmap_has_mmio())
+ return 1;
- if (*size > md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT) - phys_addr)
- *size = md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT) - phys_addr;
- return 1;
- }
- }
return 0;
}
@@ -707,32 +795,6 @@ efi_uart_console_only(void)
return 0;
}
-#define efi_md_size(md) (md->num_pages << EFI_PAGE_SHIFT)
-
-static inline u64
-kmd_end(kern_memdesc_t *kmd)
-{
- return (kmd->start + (kmd->num_pages << EFI_PAGE_SHIFT));
-}
-
-static inline u64
-efi_md_end(efi_memory_desc_t *md)
-{
- return (md->phys_addr + efi_md_size(md));
-}
-
-static inline int
-efi_wb(efi_memory_desc_t *md)
-{
- return (md->attribute & EFI_MEMORY_WB);
-}
-
-static inline int
-efi_uc(efi_memory_desc_t *md)
-{
- return (md->attribute & EFI_MEMORY_UC);
-}
-
/*
* Look for the first granule aligned memory descriptor memory
* that is big enough to hold EFI memory map. Make sure this
diff --git a/arch/ia64/kernel/entry.S b/arch/ia64/kernel/entry.S
index 0741b066b98..7a6ffd61378 100644
--- a/arch/ia64/kernel/entry.S
+++ b/arch/ia64/kernel/entry.S
@@ -1600,5 +1600,6 @@ sys_call_table:
data8 sys_inotify_init
data8 sys_inotify_add_watch
data8 sys_inotify_rm_watch
+ data8 sys_migrate_pages // 1280
.org sys_call_table + 8*NR_syscalls // guard against failures to increase NR_syscalls
diff --git a/arch/ia64/kernel/head.S b/arch/ia64/kernel/head.S
index bfe65b2e862..fbc7ea35dd5 100644
--- a/arch/ia64/kernel/head.S
+++ b/arch/ia64/kernel/head.S
@@ -1060,7 +1060,7 @@ SET_REG(b5);
* the clobber lists for spin_lock() in include/asm-ia64/spinlock.h.
*/
-#if __GNUC__ < 3 || (__GNUC__ == 3 && __GNUC_MINOR__ < 3)
+#if (__GNUC__ == 3 && __GNUC_MINOR__ < 3)
GLOBAL_ENTRY(ia64_spinlock_contention_pre3_4)
.prologue
diff --git a/arch/ia64/kernel/ia64_ksyms.c b/arch/ia64/kernel/ia64_ksyms.c
index 5db9d3bcbbc..e72de580ebb 100644
--- a/arch/ia64/kernel/ia64_ksyms.c
+++ b/arch/ia64/kernel/ia64_ksyms.c
@@ -103,7 +103,7 @@ EXPORT_SYMBOL(unw_init_running);
#ifdef ASM_SUPPORTED
# ifdef CONFIG_SMP
-# if __GNUC__ < 3 || (__GNUC__ == 3 && __GNUC_MINOR__ < 3)
+# if (__GNUC__ == 3 && __GNUC_MINOR__ < 3)
/*
* This is not a normal routine and we don't want a function descriptor for it, so we use
* a fake declaration here.
diff --git a/arch/ia64/kernel/ptrace.c b/arch/ia64/kernel/ptrace.c
index 4b19d041063..8d88eeea02d 100644
--- a/arch/ia64/kernel/ptrace.c
+++ b/arch/ia64/kernel/ptrace.c
@@ -1422,14 +1422,7 @@ sys_ptrace (long request, pid_t pid, unsigned long addr, unsigned long data)
lock_kernel();
ret = -EPERM;
if (request == PTRACE_TRACEME) {
- /* are we already being traced? */
- if (current->ptrace & PT_PTRACED)
- goto out;
- ret = security_ptrace(current->parent, current);
- if (ret)
- goto out;
- current->ptrace |= PT_PTRACED;
- ret = 0;
+ ret = ptrace_traceme();
goto out;
}
diff --git a/arch/ia64/oprofile/backtrace.c b/arch/ia64/oprofile/backtrace.c
index b7dabbfb0d6..adb01566bd5 100644
--- a/arch/ia64/oprofile/backtrace.c
+++ b/arch/ia64/oprofile/backtrace.c
@@ -32,7 +32,7 @@ typedef struct
u64 *prev_pfs_loc; /* state for WAR for old spinlock ool code */
} ia64_backtrace_t;
-#if __GNUC__ < 3 || (__GNUC__ == 3 && __GNUC_MINOR__ < 3)
+#if (__GNUC__ == 3 && __GNUC_MINOR__ < 3)
/*
* Returns non-zero if the PC is in the spinlock contention out-of-line code
* with non-standard calling sequence (on older compilers).
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-04 23:52:42 +0000