18 files changed, 89 insertions, 43 deletions

diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index 14bcd59bcdee..5b6d1a95776f 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -62,6 +62,7 @@ int acpi_fix_pin2_polarity __initdata;
 
 #ifdef CONFIG_X86_LOCAL_APIC
 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
+static bool acpi_support_online_capable;
 #endif
 
 #ifdef CONFIG_X86_IO_APIC
@@ -138,6 +139,8 @@ static int __init acpi_parse_madt(struct acpi_table_header *table)
 
 		pr_debug("Local APIC address 0x%08x\n", madt->address);
 	}
+	if (madt->header.revision >= 5)
+		acpi_support_online_capable = true;
 
 	default_acpi_madt_oem_check(madt->header.oem_id,
 				    madt->header.oem_table_id);
@@ -239,6 +242,12 @@ acpi_parse_lapic(union acpi_subtable_headers * header, const unsigned long end)
 	if (processor->id == 0xff)
 		return 0;
 
+	/* don't register processors that can not be onlined */
+	if (acpi_support_online_capable &&
+	    !(processor->lapic_flags & ACPI_MADT_ENABLED) &&
+	    !(processor->lapic_flags & ACPI_MADT_ONLINE_CAPABLE))
+		return 0;
+
 	/*
 	 * We need to register disabled CPU as well to permit
 	 * counting disabled CPUs. This allows us to size
diff --git a/arch/x86/kernel/acpi/cstate.c b/arch/x86/kernel/acpi/cstate.c
index 7de599eba7f0..7945eae5b315 100644
--- a/arch/x86/kernel/acpi/cstate.c
+++ b/arch/x86/kernel/acpi/cstate.c
@@ -79,6 +79,21 @@ void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
 		 */
 		flags->bm_control = 0;
 	}
+	if (c->x86_vendor == X86_VENDOR_AMD && c->x86 >= 0x17) {
+		/*
+		 * For all AMD Zen or newer CPUs that support C3, caches
+		 * should not be flushed by software while entering C3
+		 * type state. Set bm->check to 1 so that kernel doesn't
+		 * need to execute cache flush operation.
+		 */
+		flags->bm_check = 1;
+		/*
+		 * In current AMD C state implementation ARB_DIS is no longer
+		 * used. So set bm_control to zero to indicate ARB_DIS is not
+		 * required while entering C3 type state.
+		 */
+		flags->bm_control = 0;
+	}
 }
 EXPORT_SYMBOL(acpi_processor_power_init_bm_check);
 
diff --git a/arch/x86/kernel/aperture_64.c b/arch/x86/kernel/aperture_64.c
index 10562885f5fc..af3ba08b684b 100644
--- a/arch/x86/kernel/aperture_64.c
+++ b/arch/x86/kernel/aperture_64.c
@@ -73,12 +73,23 @@ static int gart_mem_pfn_is_ram(unsigned long pfn)
 		      (pfn >= aperture_pfn_start + aperture_page_count));
 }
 
+#ifdef CONFIG_PROC_VMCORE
+static bool gart_oldmem_pfn_is_ram(struct vmcore_cb *cb, unsigned long pfn)
+{
+	return !!gart_mem_pfn_is_ram(pfn);
+}
+
+static struct vmcore_cb gart_vmcore_cb = {
+	.pfn_is_ram = gart_oldmem_pfn_is_ram,
+};
+#endif
+
 static void __init exclude_from_core(u64 aper_base, u32 aper_order)
 {
 	aperture_pfn_start = aper_base >> PAGE_SHIFT;
 	aperture_page_count = (32 * 1024 * 1024) << aper_order >> PAGE_SHIFT;
 #ifdef CONFIG_PROC_VMCORE
-	WARN_ON(register_oldmem_pfn_is_ram(&gart_mem_pfn_is_ram));
+	register_vmcore_cb(&gart_vmcore_cb);
 #endif
 #ifdef CONFIG_PROC_KCORE
 	WARN_ON(register_mem_pfn_is_ram(&gart_mem_pfn_is_ram));
diff --git a/arch/x86/kernel/cpu/mce/amd.c b/arch/x86/kernel/cpu/mce/amd.c
index 27cacf504663..fc85eb17cb6d 100644
--- a/arch/x86/kernel/cpu/mce/amd.c
+++ b/arch/x86/kernel/cpu/mce/amd.c
@@ -119,7 +119,7 @@ const char *smca_get_long_name(enum smca_bank_types t)
 }
 EXPORT_SYMBOL_GPL(smca_get_long_name);
 
-static enum smca_bank_types smca_get_bank_type(unsigned int bank)
+enum smca_bank_types smca_get_bank_type(unsigned int bank)
 {
 	struct smca_bank *b;
 
@@ -132,6 +132,7 @@ static enum smca_bank_types smca_get_bank_type(unsigned int bank)
 
 	return b->hwid->bank_type;
 }
+EXPORT_SYMBOL_GPL(smca_get_bank_type);
 
 static struct smca_hwid smca_hwid_mcatypes[] = {
 	/* { bank_type, hwid_mcatype } */
diff --git a/arch/x86/kernel/cpu/microcode/amd.c b/arch/x86/kernel/cpu/microcode/amd.c
index 3d4a48336084..8b2fcdfa6d31 100644
--- a/arch/x86/kernel/cpu/microcode/amd.c
+++ b/arch/x86/kernel/cpu/microcode/amd.c
@@ -456,17 +456,23 @@ apply_microcode_early_amd(u32 cpuid_1_eax, void *ucode, size_t size, bool save_p
 
 static bool get_builtin_microcode(struct cpio_data *cp, unsigned int family)
 {
-#ifdef CONFIG_X86_64
 	char fw_name[36] = "amd-ucode/microcode_amd.bin";
+	struct firmware fw;
+
+	if (IS_ENABLED(CONFIG_X86_32))
+		return false;
 
 	if (family >= 0x15)
 		snprintf(fw_name, sizeof(fw_name),
 			 "amd-ucode/microcode_amd_fam%.2xh.bin", family);
 
-	return get_builtin_firmware(cp, fw_name);
-#else
+	if (firmware_request_builtin(&fw, fw_name)) {
+		cp->size = fw.size;
+		cp->data = (void *)fw.data;
+		return true;
+	}
+
 	return false;
-#endif
 }
 
 static void __load_ucode_amd(unsigned int cpuid_1_eax, struct cpio_data *ret)
diff --git a/arch/x86/kernel/cpu/microcode/core.c b/arch/x86/kernel/cpu/microcode/core.c
index efb69be41ab1..f955d25076ba 100644
--- a/arch/x86/kernel/cpu/microcode/core.c
+++ b/arch/x86/kernel/cpu/microcode/core.c
@@ -140,23 +140,6 @@ static bool __init check_loader_disabled_bsp(void)
 	return *res;
 }
 
-extern struct builtin_fw __start_builtin_fw[];
-extern struct builtin_fw __end_builtin_fw[];
-
-bool get_builtin_firmware(struct cpio_data *cd, const char *name)
-{
-	struct builtin_fw *b_fw;
-
-	for (b_fw = __start_builtin_fw; b_fw != __end_builtin_fw; b_fw++) {
-		if (!strcmp(name, b_fw->name)) {
-			cd->size = b_fw->size;
-			cd->data = b_fw->data;
-			return true;
-		}
-	}
-	return false;
-}
-
 void __init load_ucode_bsp(void)
 {
 	unsigned int cpuid_1_eax;
diff --git a/arch/x86/kernel/cpu/microcode/intel.c b/arch/x86/kernel/cpu/microcode/intel.c
index 7e8e07bddd5f..d28a9f8f3fec 100644
--- a/arch/x86/kernel/cpu/microcode/intel.c
+++ b/arch/x86/kernel/cpu/microcode/intel.c
@@ -456,6 +456,7 @@ static void save_mc_for_early(struct ucode_cpu_info *uci, u8 *mc, unsigned int s
 static bool load_builtin_intel_microcode(struct cpio_data *cp)
 {
 	unsigned int eax = 1, ebx, ecx = 0, edx;
+	struct firmware fw;
 	char name[30];
 
 	if (IS_ENABLED(CONFIG_X86_32))
@@ -466,7 +467,13 @@ static bool load_builtin_intel_microcode(struct cpio_data *cp)
 	sprintf(name, "intel-ucode/%02x-%02x-%02x",
 		      x86_family(eax), x86_model(eax), x86_stepping(eax));
 
-	return get_builtin_firmware(cp, name);
+	if (firmware_request_builtin(&fw, name)) {
+		cp->size = fw.size;
+		cp->data = (void *)fw.data;
+		return true;
+	}
+
+	return false;
 }
 
 /*
diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c
index e095c28d27ae..4794b716ec79 100644
--- a/arch/x86/kernel/cpu/mshyperv.c
+++ b/arch/x86/kernel/cpu/mshyperv.c
@@ -313,9 +313,14 @@ static void __init ms_hyperv_init_platform(void)
 	if (ms_hyperv.priv_high & HV_ISOLATION) {
 		ms_hyperv.isolation_config_a = cpuid_eax(HYPERV_CPUID_ISOLATION_CONFIG);
 		ms_hyperv.isolation_config_b = cpuid_ebx(HYPERV_CPUID_ISOLATION_CONFIG);
+		ms_hyperv.shared_gpa_boundary =
+			BIT_ULL(ms_hyperv.shared_gpa_boundary_bits);
 
 		pr_info("Hyper-V: Isolation Config: Group A 0x%x, Group B 0x%x\n",
 			ms_hyperv.isolation_config_a, ms_hyperv.isolation_config_b);
+
+		if (hv_get_isolation_type() == HV_ISOLATION_TYPE_SNP)
+			static_branch_enable(&isolation_type_snp);
 	}
 
 	if (hv_max_functions_eax >= HYPERV_CPUID_NESTED_FEATURES) {
diff --git a/arch/x86/kernel/devicetree.c b/arch/x86/kernel/devicetree.c
index 78b2311b3b8b..5cd51f25f446 100644
--- a/arch/x86/kernel/devicetree.c
+++ b/arch/x86/kernel/devicetree.c
@@ -134,12 +134,11 @@ static void __init dtb_cpu_setup(void)
 {
 	struct device_node *dn;
 	u32 apic_id, version;
-	int ret;
 
 	version = GET_APIC_VERSION(apic_read(APIC_LVR));
 	for_each_of_cpu_node(dn) {
-		ret = of_property_read_u32(dn, "reg", &apic_id);
-		if (ret < 0) {
+		apic_id = of_get_cpu_hwid(dn, 0);
+		if (apic_id == ~0U) {
 			pr_warn("%pOF: missing local APIC ID\n", dn);
 			continue;
 		}
diff --git a/arch/x86/kernel/doublefault_32.c b/arch/x86/kernel/doublefault_32.c
index d1d49e3d536b..3b58d8703094 100644
--- a/arch/x86/kernel/doublefault_32.c
+++ b/arch/x86/kernel/doublefault_32.c
@@ -77,9 +77,6 @@ asmlinkage noinstr void __noreturn doublefault_shim(void)
 	 * some way to reconstruct CR3.  We could make a credible guess based
 	 * on cpu_tlbstate, but that would be racy and would not account for
 	 * PTI.
-	 *
-	 * Instead, don't bother.  We can return through
-	 * rewind_stack_do_exit() instead.
 	 */
 	panic("cannot return from double fault\n");
 }
diff --git a/arch/x86/kernel/fpu/signal.c b/arch/x86/kernel/fpu/signal.c
index cc977da6e128..d5958278eba6 100644
--- a/arch/x86/kernel/fpu/signal.c
+++ b/arch/x86/kernel/fpu/signal.c
@@ -309,7 +309,7 @@ retry:
 		if (ret != X86_TRAP_PF)
 			return false;
 
-		if (!fault_in_pages_readable(buf, size))
+		if (!fault_in_readable(buf, size))
 			goto retry;
 		return false;
 	}
diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c
index e28f6a5d14f1..766ffe3ba313 100644
--- a/arch/x86/kernel/irq.c
+++ b/arch/x86/kernel/irq.c
@@ -291,8 +291,10 @@ void kvm_set_posted_intr_wakeup_handler(void (*handler)(void))
 {
 	if (handler)
 		kvm_posted_intr_wakeup_handler = handler;
-	else
+	else {
 		kvm_posted_intr_wakeup_handler = dummy_handler;
+		synchronize_rcu();
+	}
 }
 EXPORT_SYMBOL_GPL(kvm_set_posted_intr_wakeup_handler);
 
diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c
index ebc45360ffd4..7157c2df3bc2 100644
--- a/arch/x86/kernel/paravirt.c
+++ b/arch/x86/kernel/paravirt.c
@@ -46,6 +46,17 @@ asm (".pushsection .entry.text, \"ax\"\n"
      ".type _paravirt_nop, @function\n\t"
      ".popsection");
 
+/* stub always returning 0. */
+asm (".pushsection .entry.text, \"ax\"\n"
+     ".global paravirt_ret0\n"
+     "paravirt_ret0:\n\t"
+     "xor %" _ASM_AX ", %" _ASM_AX ";\n\t"
+     "ret\n\t"
+     ".size paravirt_ret0, . - paravirt_ret0\n\t"
+     ".type paravirt_ret0, @function\n\t"
+     ".popsection");
+
+
 void __init default_banner(void)
 {
 	printk(KERN_INFO "Booting paravirtualized kernel on %s\n",
@@ -53,7 +64,7 @@ void __init default_banner(void)
 }
 
 /* Undefined instruction for dealing with missing ops pointers. */
-static void paravirt_BUG(void)
+noinstr void paravirt_BUG(void)
 {
 	BUG();
 }
diff --git a/arch/x86/kernel/probe_roms.c b/arch/x86/kernel/probe_roms.c
index 9e1def3744f2..36e84d904260 100644
--- a/arch/x86/kernel/probe_roms.c
+++ b/arch/x86/kernel/probe_roms.c
@@ -80,7 +80,7 @@ static struct resource video_rom_resource = {
  */
 static bool match_id(struct pci_dev *pdev, unsigned short vendor, unsigned short device)
 {
-	struct pci_driver *drv = pdev->driver;
+	struct pci_driver *drv = to_pci_driver(pdev->dev.driver);
 	const struct pci_device_id *id;
 
 	if (pdev->vendor == vendor && pdev->device == device)
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 40ed44ead063..49b596db5631 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -322,7 +322,7 @@ static void __init reserve_initrd(void)
 
 	relocate_initrd();
 
-	memblock_free(ramdisk_image, ramdisk_end - ramdisk_image);
+	memblock_phys_free(ramdisk_image, ramdisk_end - ramdisk_image);
 }
 
 #else
@@ -521,7 +521,7 @@ static void __init reserve_crashkernel(void)
 	}
 
 	if (crash_base >= (1ULL << 32) && reserve_crashkernel_low()) {
-		memblock_free(crash_base, crash_size);
+		memblock_phys_free(crash_base, crash_size);
 		return;
 	}
 
diff --git a/arch/x86/kernel/setup_percpu.c b/arch/x86/kernel/setup_percpu.c
index 5afd98559193..7b65275544b2 100644
--- a/arch/x86/kernel/setup_percpu.c
+++ b/arch/x86/kernel/setup_percpu.c
@@ -135,7 +135,7 @@ static void * __init pcpu_fc_alloc(unsigned int cpu, size_t size, size_t align)
 
 static void __init pcpu_fc_free(void *ptr, size_t size)
 {
-	memblock_free_ptr(ptr, size);
+	memblock_free(ptr, size);
 }
 
 static int __init pcpu_cpu_distance(unsigned int from, unsigned int to)
diff --git a/arch/x86/kernel/unwind_orc.c b/arch/x86/kernel/unwind_orc.c
index e6f7592790af..2de3c8c5eba9 100644
--- a/arch/x86/kernel/unwind_orc.c
+++ b/arch/x86/kernel/unwind_orc.c
@@ -175,7 +175,7 @@ static struct orc_entry *orc_find(unsigned long ip)
 	}
 
 	/* vmlinux .init slow lookup: */
-	if (init_kernel_text(ip))
+	if (is_kernel_inittext(ip))
 		return __orc_find(__start_orc_unwind_ip, __start_orc_unwind,
 				  __stop_orc_unwind_ip - __start_orc_unwind_ip, ip);
 
diff --git a/arch/x86/kernel/vm86_32.c b/arch/x86/kernel/vm86_32.c
index e5a7a10a0164..f14f69d7aa3c 100644
--- a/arch/x86/kernel/vm86_32.c
+++ b/arch/x86/kernel/vm86_32.c
@@ -106,10 +106,8 @@ void save_v86_state(struct kernel_vm86_regs *regs, int retval)
 	 */
 	local_irq_enable();
 
-	if (!vm86 || !vm86->user_vm86) {
-		pr_alert("no user_vm86: BAD\n");
-		do_exit(SIGSEGV);
-	}
+	BUG_ON(!vm86 || !vm86->user_vm86);
+
 	set_flags(regs->pt.flags, VEFLAGS, X86_EFLAGS_VIF | vm86->veflags_mask);
 	user = vm86->user_vm86;
 
@@ -142,6 +140,7 @@ void save_v86_state(struct kernel_vm86_regs *regs, int retval)
 
 	user_access_end();
 
+exit_vm86:
 	preempt_disable();
 	tsk->thread.sp0 = vm86->saved_sp0;
 	tsk->thread.sysenter_cs = __KERNEL_CS;
@@ -161,7 +160,8 @@ Efault_end:
 	user_access_end();
 Efault:
 	pr_alert("could not access userspace vm86 info\n");
-	do_exit(SIGSEGV);
+	force_fatal_sig(SIGSEGV);
+	goto exit_vm86;
 }
 
 static int do_vm86_irq_handling(int subfunction, int irqnumber);