Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...

* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86: Remove redundant non-NUMA topology functions
  x86: early_printk: Protect against using the same device twice
  x86: Reduce verbosity of "PAT enabled" kernel message
  x86: Reduce verbosity of "TSC is reliable" message
  x86: mce: Use safer ways to access MCE registers
  x86: mce, inject: Use real inject-msg in raise_local
  x86: mce: Fix thermal throttling message storm
  x86: mce: Clean up thermal throttling state tracking code
  x86: split NX setup into separate file to limit unstack-protected code
  xen: check EFER for NX before setting up GDT mapping
  x86: Cleanup linker script using new linker script macros.
  x86: Use section .data.page_aligned for the idt_table.
  x86: convert to use __HEAD and HEAD_TEXT macros.
  x86: convert compressed loader to use __HEAD and HEAD_TEXT macros.
  x86: fix fragile computation of vsyscall address

diff --git a/arch/x86/boot/compressed/head_32.S b/arch/x86/boot/compressed/head_32.S
index 75e4f001e7061e5d3036197ac202dbee8e3d07a2..f543b70ffae25b24e89c15bc03b17576124efc7b 100644 (file)
--- a/arch/x86/boot/compressed/head_32.S
+++ b/arch/x86/boot/compressed/head_32.S
@@ -23,13 +23,14 @@
  */
        .text
 
+#include <linux/init.h>
 #include <linux/linkage.h>
 #include <asm/segment.h>
 #include <asm/page_types.h>
 #include <asm/boot.h>
 #include <asm/asm-offsets.h>
 
-       .section ".text.head","ax",@progbits
+       __HEAD
 ENTRY(startup_32)
        cld
        /*

diff --git a/arch/x86/boot/compressed/head_64.S b/arch/x86/boot/compressed/head_64.S
index f62c284db9eb5c94edf1df794b26e13ace0b4113..077e1b69198e75d2a14fe7cfe0ff8a421f8686a3 100644 (file)
--- a/arch/x86/boot/compressed/head_64.S
+++ b/arch/x86/boot/compressed/head_64.S
@@ -24,6 +24,7 @@
        .code32
        .text
 
+#include <linux/init.h>
 #include <linux/linkage.h>
 #include <asm/segment.h>
 #include <asm/pgtable_types.h>
@@ -33,7 +34,7 @@
 #include <asm/processor-flags.h>
 #include <asm/asm-offsets.h>
 
-       .section ".text.head"
+       __HEAD
        .code32
 ENTRY(startup_32)
        cld

diff --git a/arch/x86/boot/compressed/vmlinux.lds.S b/arch/x86/boot/compressed/vmlinux.lds.S
index cc353e1b3ffd49185f2cf0683e21894462f0c1de..f4193bb487825706146c0baee980e6c962955231 100644 (file)
--- a/arch/x86/boot/compressed/vmlinux.lds.S
+++ b/arch/x86/boot/compressed/vmlinux.lds.S
@@ -1,3 +1,5 @@
+#include <asm-generic/vmlinux.lds.h>
+
 OUTPUT_FORMAT(CONFIG_OUTPUT_FORMAT, CONFIG_OUTPUT_FORMAT, CONFIG_OUTPUT_FORMAT)
 
 #undef i386
@@ -18,9 +20,9 @@ SECTIONS
         * address 0.
         */
        . = 0;
-       .text.head : {
+       .head.text : {
                _head = . ;
-               *(.text.head)
+               HEAD_TEXT
                _ehead = . ;
        }
        .rodata.compressed : {

diff --git a/arch/x86/include/asm/pgtable_types.h b/arch/x86/include/asm/pgtable_types.h
index 7b467bf3c68067218d1a79a40818018b9ed90134..d1f4a760be23dc6cfe9a2feff61a7b07d1dc8c46 100644 (file)
--- a/arch/x86/include/asm/pgtable_types.h
+++ b/arch/x86/include/asm/pgtable_types.h
@@ -277,6 +277,7 @@ static inline pteval_t pte_flags(pte_t pte)
 typedef struct page *pgtable_t;
 
 extern pteval_t __supported_pte_mask;
+extern void set_nx(void);
 extern int nx_enabled;
 
 #define pgprot_writecombine    pgprot_writecombine

diff --git a/arch/x86/include/asm/topology.h b/arch/x86/include/asm/topology.h
index 6f0695d744bf1a44304862fe8898cf24ce815ece..25a92842dd994f688239186211b0d76b8d5772cb 100644 (file)
--- a/arch/x86/include/asm/topology.h
+++ b/arch/x86/include/asm/topology.h
@@ -165,21 +165,11 @@ static inline int numa_node_id(void)
        return 0;
 }
 
-static inline int cpu_to_node(int cpu)
-{
-       return 0;
-}
-
 static inline int early_cpu_to_node(int cpu)
 {
        return 0;
 }
 
-static inline const struct cpumask *cpumask_of_node(int node)
-{
-       return cpu_online_mask;
-}
-
 static inline void setup_node_to_cpumask_map(void) { }
 
 #endif

diff --git a/arch/x86/kernel/cpu/mcheck/mce-inject.c b/arch/x86/kernel/cpu/mcheck/mce-inject.c
index 7029f0e2acadef9bc0e6d93820cc4ab08bb09797..472763d9209841dd247c9052bb29144b8682b097 100644 (file)
--- a/arch/x86/kernel/cpu/mcheck/mce-inject.c
+++ b/arch/x86/kernel/cpu/mcheck/mce-inject.c
@@ -98,8 +98,9 @@ static struct notifier_block mce_raise_nb = {
 };
 
 /* Inject mce on current CPU */
-static int raise_local(struct mce *m)
+static int raise_local(void)
 {
+       struct mce *m = &__get_cpu_var(injectm);
        int context = MCJ_CTX(m->inject_flags);
        int ret = 0;
        int cpu = m->extcpu;
@@ -167,12 +168,12 @@ static void raise_mce(struct mce *m)
                        }
                        cpu_relax();
                }
-               raise_local(m);
+               raise_local();
                put_cpu();
                put_online_cpus();
        } else
 #endif
-               raise_local(m);
+               raise_local();
 }
 
 /* Error injection interface */

diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index 2f5aab26320e120b3531247e7682b1221721f96e..4b2af86e3e8d2388a74b2dec2b1145253b43427a 100644 (file)
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -305,13 +305,25 @@ static int msr_to_offset(u32 msr)
 static u64 mce_rdmsrl(u32 msr)
 {
        u64 v;
+
        if (__get_cpu_var(injectm).finished) {
                int offset = msr_to_offset(msr);
+
                if (offset < 0)
                        return 0;
                return *(u64 *)((char *)&__get_cpu_var(injectm) + offset);
        }
-       rdmsrl(msr, v);
+
+       if (rdmsrl_safe(msr, &v)) {
+               WARN_ONCE(1, "mce: Unable to read msr %d!\n", msr);
+               /*
+                * Return zero in case the access faulted. This should
+                * not happen normally but can happen if the CPU does
+                * something weird, or if the code is buggy.
+                */
+               v = 0;
+       }
+
        return v;
 }
 
@@ -319,6 +331,7 @@ static void mce_wrmsrl(u32 msr, u64 v)
 {
        if (__get_cpu_var(injectm).finished) {
                int offset = msr_to_offset(msr);
+
                if (offset >= 0)
                        *(u64 *)((char *)&__get_cpu_var(injectm) + offset) = v;
                return;
@@ -415,7 +428,7 @@ static inline void mce_get_rip(struct mce *m, struct pt_regs *regs)
                m->ip = mce_rdmsrl(rip_msr);
 }
 
-#ifdef CONFIG_X86_LOCAL_APIC 
+#ifdef CONFIG_X86_LOCAL_APIC
 /*
  * Called after interrupts have been reenabled again
  * when a MCE happened during an interrupts off region
@@ -1172,6 +1185,7 @@ static int mce_banks_init(void)
                return -ENOMEM;
        for (i = 0; i < banks; i++) {
                struct mce_bank *b = &mce_banks[i];
+
                b->ctl = -1ULL;
                b->init = 1;
        }
@@ -1203,6 +1217,7 @@ static int __cpuinit mce_cap_init(void)
        banks = b;
        if (!mce_banks) {
                int err = mce_banks_init();
+
                if (err)
                        return err;
        }
@@ -1237,6 +1252,7 @@ static void mce_init(void)
 
        for (i = 0; i < banks; i++) {
                struct mce_bank *b = &mce_banks[i];
+
                if (!b->init)
                        continue;
                wrmsrl(MSR_IA32_MCx_CTL(i), b->ctl);
@@ -1626,6 +1642,7 @@ static int mce_disable(void)
 
        for (i = 0; i < banks; i++) {
                struct mce_bank *b = &mce_banks[i];
+
                if (b->init)
                        wrmsrl(MSR_IA32_MCx_CTL(i), 0);
        }
@@ -1911,6 +1928,7 @@ static void mce_disable_cpu(void *h)
                cmci_clear();
        for (i = 0; i < banks; i++) {
                struct mce_bank *b = &mce_banks[i];
+
                if (b->init)
                        wrmsrl(MSR_IA32_MCx_CTL(i), 0);
        }
@@ -1928,6 +1946,7 @@ static void mce_reenable_cpu(void *h)
                cmci_reenable();
        for (i = 0; i < banks; i++) {
                struct mce_bank *b = &mce_banks[i];
+
                if (b->init)
                        wrmsrl(MSR_IA32_MCx_CTL(i), b->ctl);
        }

diff --git a/arch/x86/kernel/cpu/mcheck/therm_throt.c b/arch/x86/kernel/cpu/mcheck/therm_throt.c
index 63a56d147e4a67b55ceea258dfeb20c18b9d1ccf..b3a1dba75330a4891b7d49739bd8507076a642da 100644 (file)
--- a/arch/x86/kernel/cpu/mcheck/therm_throt.c
+++ b/arch/x86/kernel/cpu/mcheck/therm_throt.c
@@ -34,20 +34,31 @@
 /* How long to wait between reporting thermal events */
 #define CHECK_INTERVAL         (300 * HZ)
 
-static DEFINE_PER_CPU(__u64, next_check) = INITIAL_JIFFIES;
-static DEFINE_PER_CPU(unsigned long, thermal_throttle_count);
-static DEFINE_PER_CPU(bool, thermal_throttle_active);
+/*
+ * Current thermal throttling state:
+ */
+struct thermal_state {
+       bool                    is_throttled;
+
+       u64                     next_check;
+       unsigned long           throttle_count;
+       unsigned long           last_throttle_count;
+};
+
+static DEFINE_PER_CPU(struct thermal_state, thermal_state);
 
-static atomic_t therm_throt_en         = ATOMIC_INIT(0);
+static atomic_t therm_throt_en = ATOMIC_INIT(0);
 
 #ifdef CONFIG_SYSFS
 #define define_therm_throt_sysdev_one_ro(_name)                                \
        static SYSDEV_ATTR(_name, 0444, therm_throt_sysdev_show_##_name, NULL)
 
 #define define_therm_throt_sysdev_show_func(name)                      \
-static ssize_t therm_throt_sysdev_show_##name(struct sys_device *dev,  \
-                                       struct sysdev_attribute *attr,  \
-                                             char *buf)                \
+                                                                       \
+static ssize_t therm_throt_sysdev_show_##name(                         \
+                       struct sys_device *dev,                         \
+                       struct sysdev_attribute *attr,                  \
+                       char *buf)                                      \
 {                                                                      \
        unsigned int cpu = dev->id;                                     \
        ssize_t ret;                                                    \
@@ -55,7 +66,7 @@ static ssize_t therm_throt_sysdev_show_##name(struct sys_device *dev, \
        preempt_disable();      /* CPU hotplug */                       \
        if (cpu_online(cpu))                                            \
                ret = sprintf(buf, "%lu\n",                             \
-                             per_cpu(thermal_throttle_##name, cpu));   \
+                             per_cpu(thermal_state, cpu).name);        \
        else                                                            \
                ret = 0;                                                \
        preempt_enable();                                               \
@@ -63,11 +74,11 @@ static ssize_t therm_throt_sysdev_show_##name(struct sys_device *dev,       \
        return ret;                                                     \
 }
 
-define_therm_throt_sysdev_show_func(count);
-define_therm_throt_sysdev_one_ro(count);
+define_therm_throt_sysdev_show_func(throttle_count);
+define_therm_throt_sysdev_one_ro(throttle_count);
 
 static struct attribute *thermal_throttle_attrs[] = {
-       &attr_count.attr,
+       &attr_throttle_count.attr,
        NULL
 };
 
@@ -93,33 +104,39 @@ static struct attribute_group thermal_throttle_attr_group = {
  *          1 : Event should be logged further, and a message has been
  *              printed to the syslog.
  */
-static int therm_throt_process(int curr)
+static int therm_throt_process(bool is_throttled)
 {
-       unsigned int cpu = smp_processor_id();
-       __u64 tmp_jiffs = get_jiffies_64();
-       bool was_throttled = __get_cpu_var(thermal_throttle_active);
-       bool is_throttled = __get_cpu_var(thermal_throttle_active) = curr;
+       struct thermal_state *state;
+       unsigned int this_cpu;
+       bool was_throttled;
+       u64 now;
+
+       this_cpu = smp_processor_id();
+       now = get_jiffies_64();
+       state = &per_cpu(thermal_state, this_cpu);
+
+       was_throttled = state->is_throttled;
+       state->is_throttled = is_throttled;
 
        if (is_throttled)
-               __get_cpu_var(thermal_throttle_count)++;
+               state->throttle_count++;
 
-       if (!(was_throttled ^ is_throttled) &&
-           time_before64(tmp_jiffs, __get_cpu_var(next_check)))
+       if (time_before64(now, state->next_check) &&
+                       state->throttle_count != state->last_throttle_count)
                return 0;
 
-       __get_cpu_var(next_check) = tmp_jiffs + CHECK_INTERVAL;
+       state->next_check = now + CHECK_INTERVAL;
+       state->last_throttle_count = state->throttle_count;
 
        /* if we just entered the thermal event */
        if (is_throttled) {
-               printk(KERN_CRIT "CPU%d: Temperature above threshold, "
-                      "cpu clock throttled (total events = %lu)\n",
-                      cpu, __get_cpu_var(thermal_throttle_count));
+               printk(KERN_CRIT "CPU%d: Temperature above threshold, cpu clock throttled (total events = %lu)\n", this_cpu, state->throttle_count);
 
                add_taint(TAINT_MACHINE_CHECK);
                return 1;
        }
        if (was_throttled) {
-               printk(KERN_INFO "CPU%d: Temperature/speed normal\n", cpu);
+               printk(KERN_INFO "CPU%d: Temperature/speed normal\n", this_cpu);
                return 1;
        }
 
@@ -213,7 +230,7 @@ static void intel_thermal_interrupt(void)
        __u64 msr_val;
 
        rdmsrl(MSR_IA32_THERM_STATUS, msr_val);
-       if (therm_throt_process(msr_val & THERM_STATUS_PROCHOT))
+       if (therm_throt_process((msr_val & THERM_STATUS_PROCHOT) != 0))
                mce_log_therm_throt_event(msr_val);
 }
 

diff --git a/arch/x86/kernel/early_printk.c b/arch/x86/kernel/early_printk.c
index 2acfd3fdc0cc0b37c139595e77c8558754c62ea9..41fd965c80c6d41caefd801ee16948d23214d905 100644 (file)
--- a/arch/x86/kernel/early_printk.c
+++ b/arch/x86/kernel/early_printk.c
@@ -178,6 +178,11 @@ asmlinkage void early_printk(const char *fmt, ...)
 
 static inline void early_console_register(struct console *con, int keep_early)
 {
+       if (early_console->index != -1) {
+               printk(KERN_CRIT "ERROR: earlyprintk= %s already used\n",
+                      con->name);
+               return;
+       }
        early_console = con;
        if (keep_early)
                early_console->flags &= ~CON_BOOT;

diff --git a/arch/x86/kernel/head_32.S b/arch/x86/kernel/head_32.S
index 218aad7ee76e050202b95a7fc303c19d29697cc9..050c278481b187b6f76528261ea3ce6540c1d82f 100644 (file)
--- a/arch/x86/kernel/head_32.S
+++ b/arch/x86/kernel/head_32.S
@@ -79,7 +79,7 @@ RESERVE_BRK(pagetables, INIT_MAP_SIZE)
  * any particular GDT layout, because we load our own as soon as we
  * can.
  */
-.section .text.head,"ax",@progbits
+__HEAD
 ENTRY(startup_32)
        /* test KEEP_SEGMENTS flag to see if the bootloader is asking
                us to not reload segments */

diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S
index d0bc0a13a43789edd7f3d7d3d3ac5bebce95f209..780cd928fcd5f9cf13cac5787450af0ec8b38b7e 100644 (file)
--- a/arch/x86/kernel/head_64.S
+++ b/arch/x86/kernel/head_64.S
@@ -40,7 +40,7 @@ L4_START_KERNEL = pgd_index(__START_KERNEL_map)
 L3_START_KERNEL = pud_index(__START_KERNEL_map)
 
        .text
-       .section .text.head
+       __HEAD
        .code64
        .globl startup_64
 startup_64:

diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c
index a665c71352b84359d01863bfd3e4864ab28ea85f..7e37dcee0cc352df1104e211d77cce2f99a9e4e8 100644 (file)
--- a/arch/x86/kernel/traps.c
+++ b/arch/x86/kernel/traps.c
@@ -72,11 +72,9 @@ char ignore_fpu_irq;
 
 /*
  * The IDT has to be page-aligned to simplify the Pentium
- * F0 0F bug workaround.. We have a special link segment
- * for this.
+ * F0 0F bug workaround.
  */
-gate_desc idt_table[NR_VECTORS]
-       __attribute__((__section__(".data.idt"))) = { { { { 0, 0 } } }, };
+gate_desc idt_table[NR_VECTORS] __page_aligned_data = { { { { 0, 0 } } }, };
 #endif
 
 DECLARE_BITMAP(used_vectors, NR_VECTORS);

diff --git a/arch/x86/kernel/tsc_sync.c b/arch/x86/kernel/tsc_sync.c
index 027b5b498993b6f0606367e2803f6fc9f15dca2c..f37930954d1596c8c366cfa87a5ddb629bb13513 100644 (file)
--- a/arch/x86/kernel/tsc_sync.c
+++ b/arch/x86/kernel/tsc_sync.c
@@ -114,7 +114,7 @@ void __cpuinit check_tsc_sync_source(int cpu)
                return;
 
        if (boot_cpu_has(X86_FEATURE_TSC_RELIABLE)) {
-               pr_info("Skipping synchronization checks as TSC is reliable.\n");
+               printk_once(KERN_INFO "Skipping synchronization checks as TSC is reliable.\n");
                return;
        }
 

diff --git a/arch/x86/kernel/vmlinux.lds.S b/arch/x86/kernel/vmlinux.lds.S
index a46acccec38a55cab91b69fdfd9cdf2dfc54a345..92929fb3f9fa929acda8f0579570d2dea4ea942a 100644 (file)
--- a/arch/x86/kernel/vmlinux.lds.S
+++ b/arch/x86/kernel/vmlinux.lds.S
@@ -65,17 +65,11 @@ SECTIONS
 #endif
 
        /* Text and read-only data */
-
-       /* bootstrapping code */
-       .text.head : AT(ADDR(.text.head) - LOAD_OFFSET) {
-               _text = .;
-               *(.text.head)
-       } :text = 0x9090
-
-       /* The rest of the text */
        .text :  AT(ADDR(.text) - LOAD_OFFSET) {
+               _text = .;
+               /* bootstrapping code */
+               HEAD_TEXT
 #ifdef CONFIG_X86_32
-               /* not really needed, already page aligned */
                . = ALIGN(PAGE_SIZE);
                *(.text.page_aligned)
 #endif
@@ -94,13 +88,7 @@ SECTIONS
 
        NOTES :text :note
 
-       /* Exception table */
-       . = ALIGN(16);
-       __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {
-               __start___ex_table = .;
-               *(__ex_table)
-               __stop___ex_table = .;
-       } :text = 0x9090
+       EXCEPTION_TABLE(16) :text = 0x9090
 
        RO_DATA(PAGE_SIZE)
 
@@ -118,7 +106,6 @@ SECTIONS
 #endif
 
                PAGE_ALIGNED_DATA(PAGE_SIZE)
-               *(.data.idt)
 
                CACHELINE_ALIGNED_DATA(CONFIG_X86_L1_CACHE_BYTES)
 
@@ -135,24 +122,21 @@ SECTIONS
 #ifdef CONFIG_X86_64
 
 #define VSYSCALL_ADDR (-10*1024*1024)
-#define VSYSCALL_PHYS_ADDR ((LOADADDR(.data) + SIZEOF(.data) + \
-                            PAGE_SIZE - 1) & ~(PAGE_SIZE - 1))
-#define VSYSCALL_VIRT_ADDR ((ADDR(.data) + SIZEOF(.data) + \
-                            PAGE_SIZE - 1) & ~(PAGE_SIZE - 1))
 
-#define VLOAD_OFFSET (VSYSCALL_ADDR - VSYSCALL_PHYS_ADDR)
+#define VLOAD_OFFSET (VSYSCALL_ADDR - __vsyscall_0 + LOAD_OFFSET)
 #define VLOAD(x) (ADDR(x) - VLOAD_OFFSET)
 
-#define VVIRT_OFFSET (VSYSCALL_ADDR - VSYSCALL_VIRT_ADDR)
+#define VVIRT_OFFSET (VSYSCALL_ADDR - __vsyscall_0)
 #define VVIRT(x) (ADDR(x) - VVIRT_OFFSET)
 
+       . = ALIGN(4096);
+       __vsyscall_0 = .;
+
        . = VSYSCALL_ADDR;
-       .vsyscall_0 : AT(VSYSCALL_PHYS_ADDR) {
+       .vsyscall_0 : AT(VLOAD(.vsyscall_0)) {
                *(.vsyscall_0)
        } :user
 
-       __vsyscall_0 = VSYSCALL_VIRT_ADDR;
-
        . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
        .vsyscall_fn : AT(VLOAD(.vsyscall_fn)) {
                *(.vsyscall_fn)
@@ -192,11 +176,9 @@ SECTIONS
                *(.vsyscall_3)
        }
 
-       . = VSYSCALL_VIRT_ADDR + PAGE_SIZE;
+       . = __vsyscall_0 + PAGE_SIZE;
 
 #undef VSYSCALL_ADDR
-#undef VSYSCALL_PHYS_ADDR
-#undef VSYSCALL_VIRT_ADDR
 #undef VLOAD_OFFSET
 #undef VLOAD
 #undef VVIRT_OFFSET
@@ -219,36 +201,12 @@ SECTIONS
        PERCPU_VADDR(0, :percpu)
 #endif
 
-       .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
-               _sinittext = .;
-               INIT_TEXT
-               _einittext = .;
-       }
+       INIT_TEXT_SECTION(PAGE_SIZE)
 #ifdef CONFIG_X86_64
        :init
 #endif
 
-       .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {
-               INIT_DATA
-       }
-
-       . = ALIGN(16);
-       .init.setup : AT(ADDR(.init.setup) - LOAD_OFFSET) {
-               __setup_start = .;
-               *(.init.setup)
-               __setup_end = .;
-       }
-       .initcall.init : AT(ADDR(.initcall.init) - LOAD_OFFSET) {
-               __initcall_start = .;
-               INITCALLS
-               __initcall_end = .;
-       }
-
-       .con_initcall.init : AT(ADDR(.con_initcall.init) - LOAD_OFFSET) {
-               __con_initcall_start = .;
-               *(.con_initcall.init)
-               __con_initcall_end = .;
-       }
+       INIT_DATA_SECTION(16)
 
        .x86_cpu_dev.init : AT(ADDR(.x86_cpu_dev.init) - LOAD_OFFSET) {
                __x86_cpu_dev_start = .;
@@ -256,8 +214,6 @@ SECTIONS
                __x86_cpu_dev_end = .;
        }
 
-       SECURITY_INIT
-
        . = ALIGN(8);
        .parainstructions : AT(ADDR(.parainstructions) - LOAD_OFFSET) {
                __parainstructions = .;
@@ -288,15 +244,6 @@ SECTIONS
                EXIT_DATA
        }
 
-#ifdef CONFIG_BLK_DEV_INITRD
-       . = ALIGN(PAGE_SIZE);
-       .init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) {
-               __initramfs_start = .;
-               *(.init.ramfs)
-               __initramfs_end = .;
-       }
-#endif
-
 #if !defined(CONFIG_X86_64) || !defined(CONFIG_SMP)
        PERCPU(PAGE_SIZE)
 #endif

diff --git a/arch/x86/mm/Makefile b/arch/x86/mm/Makefile
index 9b5a9f59a478781bd32025a938826e9c239e0d17..06630d26e56d1e01823901f525385eb002531bf6 100644 (file)
--- a/arch/x86/mm/Makefile
+++ b/arch/x86/mm/Makefile
@@ -1,9 +1,10 @@
 obj-y  :=  init.o init_$(BITS).o fault.o ioremap.o extable.o pageattr.o mmap.o \
-           pat.o pgtable.o physaddr.o gup.o
+           pat.o pgtable.o physaddr.o gup.o setup_nx.o
 
 # Make sure __phys_addr has no stackprotector
 nostackp := $(call cc-option, -fno-stack-protector)
 CFLAGS_physaddr.o              := $(nostackp)
+CFLAGS_setup_nx.o              := $(nostackp)
 
 obj-$(CONFIG_SMP)              += tlb.o
 

diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
index 0607119cef94f2321ead2e46d467d1900a7014fb..73ffd5536f62d1fcbdd7b0c3804415436ebe4dc1 100644 (file)
--- a/arch/x86/mm/init.c
+++ b/arch/x86/mm/init.c
@@ -28,69 +28,6 @@ int direct_gbpages
 #endif
 ;
 
-int nx_enabled;
-
-#if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
-static int disable_nx __cpuinitdata;
-
-/*
- * noexec = on|off
- *
- * Control non-executable mappings for processes.
- *
- * on      Enable
- * off     Disable
- */
-static int __init noexec_setup(char *str)
-{
-       if (!str)
-               return -EINVAL;
-       if (!strncmp(str, "on", 2)) {
-               __supported_pte_mask |= _PAGE_NX;
-               disable_nx = 0;
-       } else if (!strncmp(str, "off", 3)) {
-               disable_nx = 1;
-               __supported_pte_mask &= ~_PAGE_NX;
-       }
-       return 0;
-}
-early_param("noexec", noexec_setup);
-#endif
-
-#ifdef CONFIG_X86_PAE
-static void __init set_nx(void)
-{
-       unsigned int v[4], l, h;
-
-       if (cpu_has_pae && (cpuid_eax(0x80000000) > 0x80000001)) {
-               cpuid(0x80000001, &v[0], &v[1], &v[2], &v[3]);
-
-               if ((v[3] & (1 << 20)) && !disable_nx) {
-                       rdmsr(MSR_EFER, l, h);
-                       l |= EFER_NX;
-                       wrmsr(MSR_EFER, l, h);
-                       nx_enabled = 1;
-                       __supported_pte_mask |= _PAGE_NX;
-               }
-       }
-}
-#else
-static inline void set_nx(void)
-{
-}
-#endif
-
-#ifdef CONFIG_X86_64
-void __cpuinit check_efer(void)
-{
-       unsigned long efer;
-
-       rdmsrl(MSR_EFER, efer);
-       if (!(efer & EFER_NX) || disable_nx)
-               __supported_pte_mask &= ~_PAGE_NX;
-}
-#endif
-
 static void __init find_early_table_space(unsigned long end, int use_pse,
                                          int use_gbpages)
 {

diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c
index 7257cf3decf9455ccb52f8f06bd28bc84a7f57ec..e78cd0ec2bcfa102d10af7ac7200af1506d00764 100644 (file)
--- a/arch/x86/mm/pat.c
+++ b/arch/x86/mm/pat.c
@@ -81,6 +81,7 @@ enum {
 void pat_init(void)
 {
        u64 pat;
+       bool boot_cpu = !boot_pat_state;
 
        if (!pat_enabled)
                return;
@@ -122,8 +123,10 @@ void pat_init(void)
                rdmsrl(MSR_IA32_CR_PAT, boot_pat_state);
 
        wrmsrl(MSR_IA32_CR_PAT, pat);
-       printk(KERN_INFO "x86 PAT enabled: cpu %d, old 0x%Lx, new 0x%Lx\n",
-              smp_processor_id(), boot_pat_state, pat);
+
+       if (boot_cpu)
+               printk(KERN_INFO "x86 PAT enabled: cpu %d, old 0x%Lx, new 0x%Lx\n",
+                      smp_processor_id(), boot_pat_state, pat);
 }
 
 #undef PAT

diff --git a/arch/x86/mm/setup_nx.c b/arch/x86/mm/setup_nx.c
new file mode 100644 (file)
index 0000000..513d8ed
--- /dev/null
+++ b/arch/x86/mm/setup_nx.c
@@ -0,0 +1,69 @@
+#include <linux/spinlock.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+
+#include <asm/pgtable.h>
+
+int nx_enabled;
+
+#if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
+static int disable_nx __cpuinitdata;
+
+/*
+ * noexec = on|off
+ *
+ * Control non-executable mappings for processes.
+ *
+ * on      Enable
+ * off     Disable
+ */
+static int __init noexec_setup(char *str)
+{
+       if (!str)
+               return -EINVAL;
+       if (!strncmp(str, "on", 2)) {
+               __supported_pte_mask |= _PAGE_NX;
+               disable_nx = 0;
+       } else if (!strncmp(str, "off", 3)) {
+               disable_nx = 1;
+               __supported_pte_mask &= ~_PAGE_NX;
+       }
+       return 0;
+}
+early_param("noexec", noexec_setup);
+#endif
+
+#ifdef CONFIG_X86_PAE
+void __init set_nx(void)
+{
+       unsigned int v[4], l, h;
+
+       if (cpu_has_pae && (cpuid_eax(0x80000000) > 0x80000001)) {
+               cpuid(0x80000001, &v[0], &v[1], &v[2], &v[3]);
+
+               if ((v[3] & (1 << 20)) && !disable_nx) {
+                       rdmsr(MSR_EFER, l, h);
+                       l |= EFER_NX;
+                       wrmsr(MSR_EFER, l, h);
+                       nx_enabled = 1;
+                       __supported_pte_mask |= _PAGE_NX;
+               }
+       }
+}
+#else
+void set_nx(void)
+{
+}
+#endif
+
+#ifdef CONFIG_X86_64
+void __cpuinit check_efer(void)
+{
+       unsigned long efer;
+
+       rdmsrl(MSR_EFER, efer);
+       if (!(efer & EFER_NX) || disable_nx)
+               __supported_pte_mask &= ~_PAGE_NX;
+}
+#endif
+

diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 544eb7496531b43990d5f89d588832f0c8265814..3439616d69f188787a6b06f60cc901f37b69735c 100644 (file)
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -1082,6 +1082,11 @@ asmlinkage void __init xen_start_kernel(void)
 
        __supported_pte_mask |= _PAGE_IOMAP;
 
+#ifdef CONFIG_X86_64
+       /* Work out if we support NX */
+       check_efer();
+#endif
+
        xen_setup_features();
 
        /* Get mfn list */
@@ -1123,11 +1128,6 @@ asmlinkage void __init xen_start_kernel(void)
 
        pgd = (pgd_t *)xen_start_info->pt_base;
 
-#ifdef CONFIG_X86_64
-       /* Work out if we support NX */
-       check_efer();
-#endif
-
        /* Don't do the full vcpu_info placement stuff until we have a
           possible map and a non-dummy shared_info. */
        per_cpu(xen_vcpu, 0) = &HYPERVISOR_shared_info->vcpu_info[0];