Merge branch 'x86/for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'x86/for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (160 commits)
  x86: remove extra calling to get ext cpuid level
  x86: use setup_clear_cpu_cap() when disabling the lapic
  KVM: fix exception entry / build bug, on 64-bit
  x86: add unknown_nmi_panic kernel parameter
  x86, VisWS: turn into generic arch, eliminate leftover files
  x86: add ->pre_time_init to x86_quirks
  x86: extend and use x86_quirks to clean up NUMAQ code
  x86: introduce x86_quirks
  x86: improve debug printout: add target bootmem range in early_res_to_bootmem()
  Subject: devmem, x86: fix rename of CONFIG_NONPROMISC_DEVMEM
  x86: remove arch_get_ram_range
  x86: Add a debugfs interface to dump PAT memtype
  x86: Add a arch directory for x86 under debugfs
  x86: i386: reduce boot fixmap space
  i386/xen: add proper unwind annotations to xen_sysenter_target
  x86: reduce force_mwait visibility
  x86: reduce forbid_dac's visibility
  x86: fix two modpost warnings
  x86: check function status in EDD boot code
  x86_64: ia32_signal.c: remove signal number conversion
  ...

93 files changed, 3154 insertions, 1440 deletions

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 96e0c2ebc388..03980cb04291 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -447,7 +447,6 @@ config PARAVIRT_DEBUG
 
 config MEMTEST
 	bool "Memtest"
-	depends on X86_64
 	help
 	  This option adds a kernel parameter 'memtest', which allows memtest
 	  to be set.
diff --git a/arch/x86/Kconfig.cpu b/arch/x86/Kconfig.cpu
index abff1b84ed5b..54b8c02c71e6 100644
--- a/arch/x86/Kconfig.cpu
+++ b/arch/x86/Kconfig.cpu
@@ -362,10 +362,6 @@ config X86_ALIGNMENT_16
 	def_bool y
 	depends on MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCYRIXIII || X86_ELAN || MK6 || M586MMX || M586TSC || M586 || M486 || MVIAC3_2 || MGEODEGX1
 
-config X86_GOOD_APIC
-	def_bool y
-	depends on MK7 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || MK8 || MEFFICEON || MCORE2 || MVIAC7 || X86_64
-
 config X86_INTEL_USERCOPY
 	def_bool y
 	depends on MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M586MMX || X86_GENERIC || MK8 || MK7 || MEFFICEON || MCORE2
diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug
index ae36bfa814e5..85a87d2ac0c0 100644
--- a/arch/x86/Kconfig.debug
+++ b/arch/x86/Kconfig.debug
@@ -5,13 +5,15 @@ config TRACE_IRQFLAGS_SUPPORT
 
 source "lib/Kconfig.debug"
 
-config NONPROMISC_DEVMEM
+config STRICT_DEVMEM
 	bool "Filter access to /dev/mem"
 	help
-	  If this option is left off, you allow userspace access to all
+	  If this option is left on, you allow userspace (root) access to all
 	  of memory, including kernel and userspace memory. Accidental
 	  access to this is obviously disastrous, but specific access can
-	  be used by people debugging the kernel.
+	  be used by people debugging the kernel. Note that with PAT support
+	  enabled, even in this case there are restrictions on /dev/mem
+	  use due to the cache aliasing requirements.
 
 	  If this option is switched on, the /dev/mem file only allows
 	  userspace access to PCI space and the BIOS code and data regions.
@@ -287,7 +289,6 @@ config CPA_DEBUG
 
 config OPTIMIZE_INLINING
 	bool "Allow gcc to uninline functions marked 'inline'"
-	depends on BROKEN
 	help
 	  This option determines if the kernel forces gcc to inline the functions
 	  developers have marked 'inline'. Doing so takes away freedom from gcc to
@@ -298,5 +299,7 @@ config OPTIMIZE_INLINING
 	  become the default in the future, until then this option is there to
 	  test gcc for this.
 
+	  If unsure, say N.
+
 endmenu
 
diff --git a/arch/x86/boot/edd.c b/arch/x86/boot/edd.c
index 03399d64013b..d93cbc6464d0 100644
--- a/arch/x86/boot/edd.c
+++ b/arch/x86/boot/edd.c
@@ -167,9 +167,8 @@ void query_edd(void)
 		 * Scan the BIOS-supported hard disks and query EDD
 		 * information...
 		 */
-		get_edd_info(devno, &ei);
-
-		if (boot_params.eddbuf_entries < EDDMAXNR) {
+		if (!get_edd_info(devno, &ei)
+		    && boot_params.eddbuf_entries < EDDMAXNR) {
 			memcpy(edp, &ei, sizeof ei);
 			edp++;
 			boot_params.eddbuf_entries++;
diff --git a/arch/x86/boot/pm.c b/arch/x86/boot/pm.c
index 328956fdb59e..85a1cd8a8ff8 100644
--- a/arch/x86/boot/pm.c
+++ b/arch/x86/boot/pm.c
@@ -98,12 +98,6 @@ static void reset_coprocessor(void)
 /*
  * Set up the GDT
  */
-#define GDT_ENTRY(flags, base, limit)		\
-	(((u64)(base & 0xff000000) << 32) |	\
-	 ((u64)flags << 40) |			\
-	 ((u64)(limit & 0x00ff0000) << 32) |	\
-	 ((u64)(base & 0x00ffffff) << 16) |	\
-	 ((u64)(limit & 0x0000ffff)))
 
 struct gdt_ptr {
 	u16 len;
diff --git a/arch/x86/configs/i386_defconfig b/arch/x86/configs/i386_defconfig
index 9bc34e2033ec..4d73f53287b6 100644
--- a/arch/x86/configs/i386_defconfig
+++ b/arch/x86/configs/i386_defconfig
@@ -2047,7 +2047,7 @@ CONFIG_PROVIDE_OHCI1394_DMA_INIT=y
 # CONFIG_SAMPLES is not set
 # CONFIG_KGDB is not set
 CONFIG_HAVE_ARCH_KGDB=y
-# CONFIG_NONPROMISC_DEVMEM is not set
+# CONFIG_STRICT_DEVMEM is not set
 CONFIG_EARLY_PRINTK=y
 CONFIG_DEBUG_STACKOVERFLOW=y
 CONFIG_DEBUG_STACK_USAGE=y
diff --git a/arch/x86/configs/x86_64_defconfig b/arch/x86/configs/x86_64_defconfig
index ae5124e064d4..a40452429625 100644
--- a/arch/x86/configs/x86_64_defconfig
+++ b/arch/x86/configs/x86_64_defconfig
@@ -2012,7 +2012,7 @@ CONFIG_PROVIDE_OHCI1394_DMA_INIT=y
 # CONFIG_SAMPLES is not set
 # CONFIG_KGDB is not set
 CONFIG_HAVE_ARCH_KGDB=y
-# CONFIG_NONPROMISC_DEVMEM is not set
+# CONFIG_STRICT_DEVMEM is not set
 CONFIG_EARLY_PRINTK=y
 CONFIG_DEBUG_STACKOVERFLOW=y
 CONFIG_DEBUG_STACK_USAGE=y
diff --git a/arch/x86/ia32/ia32_signal.c b/arch/x86/ia32/ia32_signal.c
index cb3856a18c85..20af4c79579a 100644
--- a/arch/x86/ia32/ia32_signal.c
+++ b/arch/x86/ia32/ia32_signal.c
@@ -36,6 +36,11 @@
 
 #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
 
+#define FIX_EFLAGS	(X86_EFLAGS_AC | X86_EFLAGS_OF | \
+			 X86_EFLAGS_DF | X86_EFLAGS_TF | X86_EFLAGS_SF | \
+			 X86_EFLAGS_ZF | X86_EFLAGS_AF | X86_EFLAGS_PF | \
+			 X86_EFLAGS_CF)
+
 asmlinkage int do_signal(struct pt_regs *regs, sigset_t *oldset);
 void signal_fault(struct pt_regs *regs, void __user *frame, char *where);
 
@@ -248,7 +253,7 @@ static int ia32_restore_sigcontext(struct pt_regs *regs,
 	regs->ss |= 3;
 
 	err |= __get_user(tmpflags, &sc->flags);
-	regs->flags = (regs->flags & ~0x40DD5) | (tmpflags & 0x40DD5);
+	regs->flags = (regs->flags & ~FIX_EFLAGS) | (tmpflags & FIX_EFLAGS);
 	/* disable syscall checks */
 	regs->orig_ax = -1;
 
@@ -515,7 +520,6 @@ int ia32_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 			compat_sigset_t *set, struct pt_regs *regs)
 {
 	struct rt_sigframe __user *frame;
-	struct exec_domain *ed = current_thread_info()->exec_domain;
 	void __user *restorer;
 	int err = 0;
 
@@ -538,8 +542,7 @@ int ia32_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 	if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
 		goto give_sigsegv;
 
-	err |= __put_user((ed && ed->signal_invmap && sig < 32
-			   ? ed->signal_invmap[sig] : sig), &frame->sig);
+	err |= __put_user(sig, &frame->sig);
 	err |= __put_user(ptr_to_compat(&frame->info), &frame->pinfo);
 	err |= __put_user(ptr_to_compat(&frame->uc), &frame->puc);
 	err |= copy_siginfo_to_user32(&frame->info, info);
diff --git a/arch/x86/ia32/ia32entry.S b/arch/x86/ia32/ia32entry.S
index 20371d0635e4..23d146ce676b 100644
--- a/arch/x86/ia32/ia32entry.S
+++ b/arch/x86/ia32/ia32entry.S
@@ -37,6 +37,11 @@
 	movq	%rax,R8(%rsp)
 	.endm
 
+	/*
+	 * Reload arg registers from stack in case ptrace changed them.
+	 * We don't reload %eax because syscall_trace_enter() returned
+	 * the value it wants us to use in the table lookup.
+	 */
 	.macro LOAD_ARGS32 offset
 	movl \offset(%rsp),%r11d
 	movl \offset+8(%rsp),%r10d
@@ -46,7 +51,6 @@
 	movl \offset+48(%rsp),%edx
 	movl \offset+56(%rsp),%esi
 	movl \offset+64(%rsp),%edi
-	movl \offset+72(%rsp),%eax
 	.endm
 	
 	.macro CFI_STARTPROC32 simple
@@ -137,13 +141,12 @@ ENTRY(ia32_sysenter_target)
  	.previous	
 	GET_THREAD_INFO(%r10)
 	orl    $TS_COMPAT,TI_status(%r10)
-	testl  $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP), \
-		 TI_flags(%r10)
+	testl  $_TIF_WORK_SYSCALL_ENTRY,TI_flags(%r10)
 	CFI_REMEMBER_STATE
 	jnz  sysenter_tracesys
-sysenter_do_call:	
 	cmpl	$(IA32_NR_syscalls-1),%eax
 	ja	ia32_badsys
+sysenter_do_call:
 	IA32_ARG_FIXUP 1
 	call	*ia32_sys_call_table(,%rax,8)
 	movq	%rax,RAX-ARGOFFSET(%rsp)
@@ -242,8 +245,7 @@ ENTRY(ia32_cstar_target)
 	.previous	
 	GET_THREAD_INFO(%r10)
 	orl   $TS_COMPAT,TI_status(%r10)
-	testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP), \
-		TI_flags(%r10)
+	testl $_TIF_WORK_SYSCALL_ENTRY,TI_flags(%r10)
 	CFI_REMEMBER_STATE
 	jnz   cstar_tracesys
 cstar_do_call:	
@@ -321,6 +323,7 @@ ENTRY(ia32_syscall)
 	/*CFI_REL_OFFSET	rflags,EFLAGS-RIP*/
 	/*CFI_REL_OFFSET	cs,CS-RIP*/
 	CFI_REL_OFFSET	rip,RIP-RIP
+	PARAVIRT_ADJUST_EXCEPTION_FRAME
 	SWAPGS
 	/*
 	 * No need to follow this irqs on/off section: the syscall
@@ -336,8 +339,7 @@ ENTRY(ia32_syscall)
 	SAVE_ARGS 0,0,1
 	GET_THREAD_INFO(%r10)
 	orl   $TS_COMPAT,TI_status(%r10)
-	testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP), \
-		TI_flags(%r10)
+	testl $_TIF_WORK_SYSCALL_ENTRY,TI_flags(%r10)
 	jnz ia32_tracesys
 ia32_do_syscall:	
 	cmpl $(IA32_NR_syscalls-1),%eax
diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
index da140611bb57..3db651fc8ec5 100644
--- a/arch/x86/kernel/Makefile
+++ b/arch/x86/kernel/Makefile
@@ -7,9 +7,10 @@ extra-y                := head_$(BITS).o head$(BITS).o head.o init_task.o vmlinu
 CPPFLAGS_vmlinux.lds += -U$(UTS_MACHINE)
 
 ifdef CONFIG_FTRACE
-# Do not profile debug utilities
+# Do not profile debug and lowlevel utilities
 CFLAGS_REMOVE_tsc.o = -pg
 CFLAGS_REMOVE_rtc.o = -pg
+CFLAGS_REMOVE_paravirt.o = -pg
 endif
 
 #
@@ -102,6 +103,7 @@ obj-$(CONFIG_OLPC)		+= olpc.o
 # 64 bit specific files
 ifeq ($(CONFIG_X86_64),y)
         obj-y				+= genapic_64.o genapic_flat_64.o genx2apic_uv_x.o tlb_uv.o
+	obj-y				+= bios_uv.o
         obj-$(CONFIG_X86_PM_TIMER)	+= pmtimer_64.o
         obj-$(CONFIG_AUDIT)		+= audit_64.o
 
diff --git a/arch/x86/kernel/acpi/sleep.c b/arch/x86/kernel/acpi/sleep.c
index 868de3d5c39d..a3ddad18aaa3 100644
--- a/arch/x86/kernel/acpi/sleep.c
+++ b/arch/x86/kernel/acpi/sleep.c
@@ -9,6 +9,7 @@
 #include <linux/bootmem.h>
 #include <linux/dmi.h>
 #include <linux/cpumask.h>
+#include <asm/segment.h>
 
 #include "realmode/wakeup.h"
 #include "sleep.h"
@@ -23,15 +24,6 @@ static unsigned long acpi_realmode;
 static char temp_stack[10240];
 #endif
 
-/* XXX: this macro should move to asm-x86/segment.h and be shared with the
-   boot code... */
-#define GDT_ENTRY(flags, base, limit)		\
-	(((u64)(base & 0xff000000) << 32) |	\
-	 ((u64)flags << 40) |			\
-	 ((u64)(limit & 0x00ff0000) << 32) |	\
-	 ((u64)(base & 0x00ffffff) << 16) |	\
-	 ((u64)(limit & 0x0000ffff)))
-
 /**
  * acpi_save_state_mem - save kernel state
  *
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index f2766d84c7a0..c25210e6ac88 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -23,7 +23,7 @@
 #include <linux/scatterlist.h>
 #include <linux/iommu-helper.h>
 #include <asm/proto.h>
-#include <asm/gart.h>
+#include <asm/iommu.h>
 #include <asm/amd_iommu_types.h>
 #include <asm/amd_iommu.h>
 
@@ -32,21 +32,37 @@
 #define to_pages(addr, size) \
 	 (round_up(((addr) & ~PAGE_MASK) + (size), PAGE_SIZE) >> PAGE_SHIFT)
 
+#define EXIT_LOOP_COUNT 10000000
+
 static DEFINE_RWLOCK(amd_iommu_devtable_lock);
 
-struct command {
+/*
+ * general struct to manage commands send to an IOMMU
+ */
+struct iommu_cmd {
 	u32 data[4];
 };
 
 static int dma_ops_unity_map(struct dma_ops_domain *dma_dom,
 			     struct unity_map_entry *e);
 
+/* returns !0 if the IOMMU is caching non-present entries in its TLB */
 static int iommu_has_npcache(struct amd_iommu *iommu)
 {
 	return iommu->cap & IOMMU_CAP_NPCACHE;
 }
 
-static int __iommu_queue_command(struct amd_iommu *iommu, struct command *cmd)
+/****************************************************************************
+ *
+ * IOMMU command queuing functions
+ *