Linux-libre 4.6.2-gnu

10 files changed, 76 insertions, 58 deletions

diff --git a/arch/x86/xen/apic.c b/arch/x86/xen/apic.c
index abf4901c9..db52a7faf 100644
--- a/arch/x86/xen/apic.c
+++ b/arch/x86/xen/apic.c
@@ -66,7 +66,7 @@ static u32 xen_apic_read(u32 reg)
 
 	ret = HYPERVISOR_platform_op(&op);
 	if (ret)
-		return 0;
+		op.u.pcpu_info.apic_id = BAD_APICID;
 
 	return op.u.pcpu_info.apic_id << 24;
 }
@@ -142,6 +142,14 @@ static void xen_silent_inquire(int apicid)
 {
 }
 
+static int xen_cpu_present_to_apicid(int cpu)
+{
+	if (cpu_present(cpu))
+		return xen_get_apic_id(xen_apic_read(APIC_ID));
+	else
+		return BAD_APICID;
+}
+
 static struct apic xen_pv_apic = {
 	.name 				= "Xen PV",
 	.probe 				= xen_apic_probe_pv,
@@ -162,7 +170,7 @@ static struct apic xen_pv_apic = {
 
 	.ioapic_phys_id_map		= default_ioapic_phys_id_map, /* Used on 32-bit */
 	.setup_apic_routing		= NULL,
-	.cpu_present_to_apicid		= default_cpu_present_to_apicid,
+	.cpu_present_to_apicid		= xen_cpu_present_to_apicid,
 	.apicid_to_cpu_present		= physid_set_mask_of_physid, /* Used on 32-bit */
 	.check_phys_apicid_present	= default_check_phys_apicid_present, /* smp_sanity_check needs it */
 	.phys_pkg_id			= xen_phys_pkg_id, /* detect_ht */
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index e3679db17..880862c7d 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -32,6 +32,7 @@
 #include <linux/gfp.h>
 #include <linux/memblock.h>
 #include <linux/edd.h>
+#include <linux/frame.h>
 
 #ifdef CONFIG_KEXEC_CORE
 #include <linux/kexec.h>
@@ -351,8 +352,8 @@ static void xen_cpuid(unsigned int *ax, unsigned int *bx,
 	*cx &= maskecx;
 	*cx |= setecx;
 	*dx &= maskedx;
-
 }
+STACK_FRAME_NON_STANDARD(xen_cpuid); /* XEN_EMULATE_PREFIX */
 
 static bool __init xen_check_mwait(void)
 {
@@ -1654,7 +1655,7 @@ asmlinkage __visible void __init xen_start_kernel(void)
 	cpu_detect(&new_cpu_data);
 	set_cpu_cap(&new_cpu_data, X86_FEATURE_FPU);
 	new_cpu_data.wp_works_ok = 1;
-	new_cpu_data.x86_capability[0] = cpuid_edx(1);
+	new_cpu_data.x86_capability[CPUID_1_EDX] = cpuid_edx(1);
 #endif
 
 	if (xen_start_info->mod_start) {
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index c913ca4f6..478a2de54 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -1256,7 +1256,7 @@ static void __init xen_pagetable_cleanhighmap(void)
 	xen_cleanhighmap(addr, addr + size);
 	xen_start_info->pt_base = (unsigned long)__va(__pa(xen_start_info->pt_base));
 #ifdef DEBUG
-	/* This is superflous and is not neccessary, but you know what
+	/* This is superfluous and is not necessary, but you know what
 	 * lets do it. The MODULES_VADDR -> MODULES_END should be clear of
 	 * anything at this stage. */
 	xen_cleanhighmap(MODULES_VADDR, roundup(MODULES_VADDR, PUD_SIZE) - 1);
@@ -1474,7 +1474,7 @@ static void xen_write_cr3(unsigned long cr3)
 /*
  * At the start of the day - when Xen launches a guest, it has already
  * built pagetables for the guest. We diligently look over them
- * in xen_setup_kernel_pagetable and graft as appropiate them in the
+ * in xen_setup_kernel_pagetable and graft as appropriate them in the
  * init_level4_pgt and its friends. Then when we are happy we load
  * the new init_level4_pgt - and continue on.
  *
@@ -2792,7 +2792,7 @@ static int remap_area_mfn_pte_fn(pte_t *ptep, pgtable_t token,
 	struct remap_data *rmd = data;
 	pte_t pte = pte_mkspecial(mfn_pte(*rmd->mfn, rmd->prot));
 
-	/* If we have a contigious range, just update the mfn itself,
+	/* If we have a contiguous range, just update the mfn itself,
 	   else update pointer to be "next mfn". */
 	if (rmd->contiguous)
 		(*rmd->mfn)++;
@@ -2833,7 +2833,7 @@ static int do_remap_gfn(struct vm_area_struct *vma,
 
 	rmd.mfn = gfn;
 	rmd.prot = prot;
-	/* We use the err_ptr to indicate if there we are doing a contigious
+	/* We use the err_ptr to indicate if there we are doing a contiguous
 	 * mapping or a discontigious mapping. */
 	rmd.contiguous = !err_ptr;
 
diff --git a/arch/x86/xen/pmu.c b/arch/x86/xen/pmu.c
index 724a08740..9466354d3 100644
--- a/arch/x86/xen/pmu.c
+++ b/arch/x86/xen/pmu.c
@@ -11,7 +11,7 @@
 #include "pmu.h"
 
 /* x86_pmu.handle_irq definition */
-#include "../kernel/cpu/perf_event.h"
+#include "../events/perf_event.h"
 
 #define XENPMU_IRQ_PROCESSING    1
 struct xenpmu {
diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index 7ab29518a..e34589145 100644
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -393,6 +393,9 @@ static unsigned long __init xen_set_identity_and_remap_chunk(
 	unsigned long i = 0;
 	unsigned long n = end_pfn - start_pfn;
 
+	if (remap_pfn == 0)
+		remap_pfn = nr_pages;
+
 	while (i < n) {
 		unsigned long cur_pfn = start_pfn + i;
 		unsigned long left = n - i;
@@ -438,17 +441,29 @@ static unsigned long __init xen_set_identity_and_remap_chunk(
 	return remap_pfn;
 }
 
-static void __init xen_set_identity_and_remap(unsigned long nr_pages)
+static unsigned long __init xen_count_remap_pages(
+	unsigned long start_pfn, unsigned long end_pfn, unsigned long nr_pages,
+	unsigned long remap_pages)
+{
+	if (start_pfn >= nr_pages)
+		return remap_pages;
+
+	return remap_pages + min(end_pfn, nr_pages) - start_pfn;
+}
+
+static unsigned long __init xen_foreach_remap_area(unsigned long nr_pages,
+	unsigned long (*func)(unsigned long start_pfn, unsigned long end_pfn,
+			      unsigned long nr_pages, unsigned long last_val))
 {
 	phys_addr_t start = 0;
-	unsigned long last_pfn = nr_pages;
+	unsigned long ret_val = 0;
 	const struct e820entry *entry = xen_e820_map;
 	int i;
 
 	/*
 	 * Combine non-RAM regions and gaps until a RAM region (or the
-	 * end of the map) is reached, then set the 1:1 map and
-	 * remap the memory in those non-RAM regions.
+	 * end of the map) is reached, then call the provided function
+	 * to perform its duty on the non-RAM region.
 	 *
 	 * The combined non-RAM regions are rounded to a whole number
 	 * of pages so any partial pages are accessible via the 1:1
@@ -466,14 +481,13 @@ static void __init xen_set_identity_and_remap(unsigned long nr_pages)
 				end_pfn = PFN_UP(entry->addr);
 
 			if (start_pfn < end_pfn)
-				last_pfn = xen_set_identity_and_remap_chunk(
-						start_pfn, end_pfn, nr_pages,
-						last_pfn);
+				ret_val = func(start_pfn, end_pfn, nr_pages,
+					       ret_val);
 			start = end;
 		}
 	}
 
-	pr_info("Released %ld page(s)\n", xen_released_pages);
+	return ret_val;
 }
 
 /*
@@ -596,35 +610,6 @@ static void __init xen_ignore_unusable(void)
 	}
 }
 
-static unsigned long __init xen_count_remap_pages(unsigned long max_pfn)
-{
-	unsigned long extra = 0;
-	unsigned long start_pfn, end_pfn;
-	const struct e820entry *entry = xen_e820_map;
-	int i;
-
-	end_pfn = 0;
-	for (i = 0; i < xen_e820_map_entries; i++, entry++) {
-		start_pfn = PFN_DOWN(entry->addr);
-		/* Adjacent regions on non-page boundaries handling! */
-		end_pfn = min(end_pfn, start_pfn);
-
-		if (start_pfn >= max_pfn)
-			return extra + max_pfn - end_pfn;
-
-		/* Add any holes in map to result. */
-		extra += start_pfn - end_pfn;
-
-		end_pfn = PFN_UP(entry->addr + entry->size);
-		end_pfn = min(end_pfn, max_pfn);
-
-		if (entry->type != E820_RAM)
-			extra += end_pfn - start_pfn;
-	}
-
-	return extra;
-}
-
 bool __init xen_is_e820_reserved(phys_addr_t start, phys_addr_t size)
 {
 	struct e820entry *entry;
@@ -804,7 +789,7 @@ char * __init xen_memory_setup(void)
 	max_pages = xen_get_max_pages();
 
 	/* How many extra pages do we need due to remapping? */
-	max_pages += xen_count_remap_pages(max_pfn);
+	max_pages += xen_foreach_remap_area(max_pfn, xen_count_remap_pages);
 
 	if (max_pages > max_pfn)
 		extra_pages += max_pages - max_pfn;
@@ -922,7 +907,9 @@ char * __init xen_memory_setup(void)
 	 * Set identity map on non-RAM pages and prepare remapping the
 	 * underlying RAM.
 	 */
-	xen_set_identity_and_remap(max_pfn);
+	xen_foreach_remap_area(max_pfn, xen_set_identity_and_remap_chunk);
+
+	pr_info("Released %ld page(s)\n", xen_released_pages);
 
 	return "Xen";
 }
diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c
index 3f4ebf026..719cf291d 100644
--- a/arch/x86/xen/smp.c
+++ b/arch/x86/xen/smp.c
@@ -112,7 +112,7 @@ asmlinkage __visible void cpu_bringup_and_idle(int cpu)
 		xen_pvh_secondary_vcpu_init(cpu);
 #endif
 	cpu_bringup();
-	cpu_startup_entry(CPUHP_ONLINE);
+	cpu_startup_entry(CPUHP_AP_ONLINE_IDLE);
 }
 
 static void xen_smp_intr_free(unsigned int cpu)
@@ -545,6 +545,8 @@ static void xen_play_dead(void) /* used only with HOTPLUG_CPU */
 	 * data back is to call:
 	 */
 	tick_nohz_idle_enter();
+
+	cpu_startup_entry(CPUHP_AP_ONLINE_IDLE);
 }
 
 #else /* !CONFIG_HOTPLUG_CPU */
diff --git a/arch/x86/xen/spinlock.c b/arch/x86/xen/spinlock.c
index 9e2ba5c6e..f42e78de1 100644
--- a/arch/x86/xen/spinlock.c
+++ b/arch/x86/xen/spinlock.c
@@ -27,6 +27,12 @@ static bool xen_pvspin = true;
 
 static void xen_qlock_kick(int cpu)
 {
+	int irq = per_cpu(lock_kicker_irq, cpu);
+
+	/* Don't kick if the target's kicker interrupt is not initialized. */
+	if (irq == -1)
+		return;
+
 	xen_send_IPI_one(cpu, XEN_SPIN_UNLOCK_VECTOR);
 }
 
diff --git a/arch/x86/xen/xen-asm.S b/arch/x86/xen/xen-asm.S
index 3e45aa000..eff224df8 100644
--- a/arch/x86/xen/xen-asm.S
+++ b/arch/x86/xen/xen-asm.S
@@ -14,6 +14,7 @@
 #include <asm/asm-offsets.h>
 #include <asm/percpu.h>
 #include <asm/processor-flags.h>
+#include <asm/frame.h>
 
 #include "xen-asm.h"
 
@@ -23,6 +24,7 @@
  * then enter the hypervisor to get them handled.
  */
 ENTRY(xen_irq_enable_direct)
+	FRAME_BEGIN
 	/* Unmask events */
 	movb $0, PER_CPU_VAR(xen_vcpu_info) + XEN_vcpu_info_mask
 
@@ -39,6 +41,7 @@ ENTRY(xen_irq_enable_direct)
 2:	call check_events
 1:
 ENDPATCH(xen_irq_enable_direct)
+	FRAME_END
 	ret
 	ENDPROC(xen_irq_enable_direct)
 	RELOC(xen_irq_enable_direct, 2b+1)
@@ -82,6 +85,7 @@ ENDPATCH(xen_save_fl_direct)
  * enters the hypervisor to get them delivered if so.
  */
 ENTRY(xen_restore_fl_direct)
+	FRAME_BEGIN
 #ifdef CONFIG_X86_64
 	testw $X86_EFLAGS_IF, %di
 #else
@@ -100,6 +104,7 @@ ENTRY(xen_restore_fl_direct)
 2:	call check_events
 1:
 ENDPATCH(xen_restore_fl_direct)
+	FRAME_END
 	ret
 	ENDPROC(xen_restore_fl_direct)
 	RELOC(xen_restore_fl_direct, 2b+1)
@@ -109,7 +114,8 @@ ENDPATCH(xen_restore_fl_direct)
  * Force an event check by making a hypercall, but preserve regs
  * before making the call.
  */
-check_events:
+ENTRY(check_events)
+	FRAME_BEGIN
 #ifdef CONFIG_X86_32
 	push %eax
 	push %ecx
@@ -139,4 +145,6 @@ check_events:
 	pop %rcx
 	pop %rax
 #endif
+	FRAME_END
 	ret
+ENDPROC(check_events)
diff --git a/arch/x86/xen/xen-asm_64.S b/arch/x86/xen/xen-asm_64.S
index cc8acc410..c3df43141 100644
--- a/arch/x86/xen/xen-asm_64.S
+++ b/arch/x86/xen/xen-asm_64.S
@@ -26,6 +26,7 @@ ENTRY(xen_adjust_exception_frame)
 	mov 8+0(%rsp), %rcx
 	mov 8+8(%rsp), %r11
 	ret $16
+ENDPROC(xen_adjust_exception_frame)
 
 hypercall_iret = hypercall_page + __HYPERVISOR_iret * 32
 /*
diff --git a/arch/x86/xen/xen-head.S b/arch/x86/xen/xen-head.S
index b65f59a35..7f8d8abf4 100644
--- a/arch/x86/xen/xen-head.S
+++ b/arch/x86/xen/xen-head.S
@@ -26,7 +26,7 @@
 		      (1 << XENFEAT_auto_translated_physmap) | \
 		      (1 << XENFEAT_supervisor_mode_kernel) | \
 		      (1 << XENFEAT_hvm_callback_vector))
-/* The XENFEAT_writable_page_tables is not stricly neccessary as we set that
+/* The XENFEAT_writable_page_tables is not stricly necessary as we set that
  * up regardless whether this CONFIG option is enabled or not, but it
  * clarifies what the right flags need to be.
  */
@@ -38,13 +38,18 @@
 	__INIT
 ENTRY(startup_xen)
 	cld
-#ifdef CONFIG_X86_32
-	mov %esi,xen_start_info
-	mov $init_thread_union+THREAD_SIZE,%esp
-#else
-	mov %rsi,xen_start_info
-	mov $init_thread_union+THREAD_SIZE,%rsp
-#endif
+
+	/* Clear .bss */
+	xor %eax,%eax
+	mov $__bss_start, %_ASM_DI
+	mov $__bss_stop, %_ASM_CX
+	sub %_ASM_DI, %_ASM_CX
+	shr $__ASM_SEL(2, 3), %_ASM_CX
+	rep __ASM_SIZE(stos)
+
+	mov %_ASM_SI, xen_start_info
+	mov $init_thread_union+THREAD_SIZE, %_ASM_SP
+
 	jmp xen_start_kernel
 
 	__FINIT