kernel 5.15.4

1 files changed, 2126 insertions, 0 deletions

diff --git a/SOURCES/patch-5.15-redhat.patch b/SOURCES/patch-5.15-redhat.patch
new file mode 100644
index 0000000..50989dc
--- /dev/null
+++ b/SOURCES/patch-5.15-redhat.patch
@@ -0,0 +1,2126 @@
+ Documentation/admin-guide/kernel-parameters.txt    |   9 ++
+ Makefile                                           |   4 +
+ arch/arm/Kconfig                                   |   4 +-
+ arch/arm64/Kconfig                                 |   3 +-
+ .../boot/dts/rockchip/rk3399-pinebook-pro.dts      |   6 +-
+ arch/arm64/kernel/acpi.c                           |   2 +-
+ arch/s390/include/asm/ipl.h                        |   1 +
+ arch/s390/kernel/ipl.c                             |   5 +
+ arch/s390/kernel/setup.c                           |   4 +
+ arch/x86/include/asm/pci_x86.h                     |  10 ++
+ arch/x86/kernel/resource.c                         |   4 +
+ arch/x86/kernel/setup.c                            |  22 ++--
+ arch/x86/pci/acpi.c                                |  49 ++++++--
+ arch/x86/pci/common.c                              |   6 +
+ crypto/rng.c                                       |  73 +++++++++++-
+ drivers/acpi/apei/hest.c                           |   8 ++
+ drivers/acpi/irq.c                                 |  17 ++-
+ drivers/acpi/scan.c                                |   9 ++
+ drivers/ata/libahci.c                              |  18 +++
+ drivers/char/ipmi/ipmi_dmi.c                       |  15 +++
+ drivers/char/ipmi/ipmi_msghandler.c                |  16 ++-
+ drivers/char/random.c                              | 115 +++++++++++++++++++
+ drivers/firmware/efi/Makefile                      |   1 +
+ drivers/firmware/efi/efi.c                         | 124 +++++++++++++++------
+ drivers/firmware/efi/secureboot.c                  |  38 +++++++
+ drivers/hid/hid-rmi.c                              |  64 -----------
+ drivers/hwtracing/coresight/coresight-etm4x-core.c |  19 ++++
+ drivers/input/rmi4/rmi_driver.c                    | 124 ++++++++++++---------
+ drivers/iommu/iommu.c                              |  22 ++++
+ .../aquantia/atlantic/hw_atl/hw_atl_utils.c        |  10 ++
+ drivers/net/wireless/marvell/mwifiex/usb.c         |   3 +-
+ drivers/nvme/host/core.c                           |  22 +++-
+ drivers/nvme/host/multipath.c                      |  19 ++--
+ drivers/nvme/host/nvme.h                           |   4 +
+ drivers/pci/quirks.c                               |  24 ++++
+ drivers/usb/core/hub.c                             |   7 ++
+ drivers/usb/host/xhci-tegra.c                      |  41 +++++--
+ fs/btrfs/async-thread.c                            |  14 +++
+ fs/fuse/dev.c                                      |  14 +--
+ include/linux/efi.h                                |  22 ++--
+ include/linux/lsm_hook_defs.h                      |   2 +
+ include/linux/lsm_hooks.h                          |   6 +
+ include/linux/random.h                             |   7 ++
+ include/linux/rmi.h                                |   1 +
+ include/linux/security.h                           |   5 +
+ init/Kconfig                                       |   2 +-
+ kernel/module_signing.c                            |   9 +-
+ scripts/tags.sh                                    |   2 +
+ security/integrity/platform_certs/load_uefi.c      |   6 +-
+ security/lockdown/Kconfig                          |  13 +++
+ security/lockdown/lockdown.c                       |   1 +
+ security/security.c                                |   6 +
+ 52 files changed, 805 insertions(+), 227 deletions(-)
+
+diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
+index 1396fd2d9031..4bc97128cee8 100644
+--- a/Documentation/admin-guide/kernel-parameters.txt
++++ b/Documentation/admin-guide/kernel-parameters.txt
+@@ -3949,6 +3949,15 @@
+ 				please report a bug.
+ 		nocrs		[X86] Ignore PCI host bridge windows from ACPI.
+ 				If you need to use this, please report a bug.
++		use_e820	[X86] Use E820 reservations to exclude parts of
++				PCI host bridge windows. This is a workaround
++				for BIOS defects in host bridge _CRS methods.
++				If you need to use this, please report a bug to
++				<linux-pci@vger.kernel.org>.
++		no_e820		[X86] Ignore E820 reservations for PCI host
++				bridge windows. This is the default on modern
++				hardware. If you need to use this, please report
++				a bug to <linux-pci@vger.kernel.org>.
+ 		routeirq	Do IRQ routing for all PCI devices.
+ 				This is normally done in pci_enable_device(),
+ 				so this option is a temporary workaround
+diff --git a/Makefile b/Makefile
+index 759e68a02cf0..4a73bba0225f 100644
+--- a/Makefile
++++ b/Makefile
+@@ -18,6 +18,10 @@ $(if $(filter __%, $(MAKECMDGOALS)), \
+ PHONY := __all
+ __all:
+
++# Set RHEL variables
++# Use this spot to avoid future merge conflicts
++include Makefile.rhelver
++
+ # We are using a recursive build, so we need to do a little thinking
+ # to get the ordering right.
+ #
+diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
+index dcf2df6da98f..b03b682850ab 100644
+--- a/arch/arm/Kconfig
++++ b/arch/arm/Kconfig
+@@ -1470,9 +1470,9 @@ config HIGHMEM
+ 	  If unsure, say n.
+
+ config HIGHPTE
+-	bool "Allocate 2nd-level pagetables from highmem" if EXPERT
++	bool "Allocate 2nd-level pagetables from highmem"
+ 	depends on HIGHMEM
+-	default y
++	default n
+ 	help
+ 	  The VM uses one page of physical memory for each page table.
+ 	  For systems with a lot of processes, this can use a lot of
+diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
+index fee914c716aa..99bb34aac703 100644
+--- a/arch/arm64/Kconfig
++++ b/arch/arm64/Kconfig
+@@ -911,7 +911,7 @@ endchoice
+
+ config ARM64_FORCE_52BIT
+ 	bool "Force 52-bit virtual addresses for userspace"
+-	depends on ARM64_VA_BITS_52 && EXPERT
++	depends on ARM64_VA_BITS_52
+ 	help
+ 	  For systems with 52-bit userspace VAs enabled, the kernel will attempt
+ 	  to maintain compatibility with older software by providing 48-bit VAs
+@@ -1152,6 +1152,7 @@ config XEN
+ config FORCE_MAX_ZONEORDER
+ 	int
+ 	default "14" if ARM64_64K_PAGES
++	default "13" if (ARCH_THUNDER && !ARM64_64K_PAGES)
+ 	default "12" if ARM64_16K_PAGES
+ 	default "11"
+ 	help
+diff --git a/arch/arm64/boot/dts/rockchip/rk3399-pinebook-pro.dts b/arch/arm64/boot/dts/rockchip/rk3399-pinebook-pro.dts
+index 2b5f001ff4a6..dae8c252bc2b 100644
+--- a/arch/arm64/boot/dts/rockchip/rk3399-pinebook-pro.dts
++++ b/arch/arm64/boot/dts/rockchip/rk3399-pinebook-pro.dts
+@@ -385,10 +385,6 @@ mains_charger: dc-charger {
+ 	};
+ };
+
+-&cdn_dp {
+-	status = "okay";
+-};
+-
+ &cpu_b0 {
+ 	cpu-supply = <&vdd_cpu_b>;
+ };
+@@ -711,7 +707,7 @@ fusb0: fusb30x@22 {
+
+ 		connector {
+ 			compatible = "usb-c-connector";
+-			data-role = "host";
++			data-role = "dual";
+ 			label = "USB-C";
+ 			op-sink-microwatt = <1000000>;
+ 			power-role = "dual";
+diff --git a/arch/arm64/kernel/acpi.c b/arch/arm64/kernel/acpi.c
+index f3851724fe35..cac21da49455 100644
+--- a/arch/arm64/kernel/acpi.c
++++ b/arch/arm64/kernel/acpi.c
+@@ -40,7 +40,7 @@ int acpi_pci_disabled = 1;	/* skip ACPI PCI scan and IRQ initialization */
+ EXPORT_SYMBOL(acpi_pci_disabled);
+
+ static bool param_acpi_off __initdata;
+-static bool param_acpi_on __initdata;
++static bool param_acpi_on __initdata = true;
+ static bool param_acpi_force __initdata;
+
+ static int __init parse_acpi(char *arg)
+diff --git a/arch/s390/include/asm/ipl.h b/arch/s390/include/asm/ipl.h
+index 3f8ee257f9aa..3ab92feb6241 100644
+--- a/arch/s390/include/asm/ipl.h
++++ b/arch/s390/include/asm/ipl.h
+@@ -128,6 +128,7 @@ int ipl_report_add_component(struct ipl_report *report, struct kexec_buf *kbuf,
+ 			     unsigned char flags, unsigned short cert);
+ int ipl_report_add_certificate(struct ipl_report *report, void *key,
+ 			       unsigned long addr, unsigned long len);
++bool ipl_get_secureboot(void);
+
+ /*
+  * DIAG 308 support
+diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c
+index e2cc35775b99..96fc8134f056 100644
+--- a/arch/s390/kernel/ipl.c
++++ b/arch/s390/kernel/ipl.c
+@@ -2215,3 +2215,8 @@ int ipl_report_free(struct ipl_report *report)
+ }
+
+ #endif
++
++bool ipl_get_secureboot(void)
++{
++	return !!ipl_secure_flag;
++}
+diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
+index 67e5fff96ee0..0d58c1f07176 100644
+--- a/arch/s390/kernel/setup.c
++++ b/arch/s390/kernel/setup.c
+@@ -49,6 +49,7 @@
+ #include <linux/memory.h>
+ #include <linux/compat.h>
+ #include <linux/start_kernel.h>
++#include <linux/security.h>
+ #include <linux/hugetlb.h>
+ #include <linux/kmemleak.h>
+
+@@ -981,6 +982,9 @@ void __init setup_arch(char **cmdline_p)
+
+ 	log_component_list();
+
++	if (ipl_get_secureboot())
++		security_lock_kernel_down("Secure IPL mode", LOCKDOWN_INTEGRITY_MAX);
++
+ 	/* Have one command line that is parsed and saved in /proc/cmdline */
+ 	/* boot_command_line has been already set up in early.c */
+ 	*cmdline_p = boot_command_line;
+diff --git a/arch/x86/include/asm/pci_x86.h b/arch/x86/include/asm/pci_x86.h
+index 490411dba438..0bb4e7dd0ffc 100644
+--- a/arch/x86/include/asm/pci_x86.h
++++ b/arch/x86/include/asm/pci_x86.h
+@@ -39,6 +39,8 @@ do {						\
+ #define PCI_ROOT_NO_CRS		0x100000
+ #define PCI_NOASSIGN_BARS	0x200000
+ #define PCI_BIG_ROOT_WINDOW	0x400000
++#define PCI_USE_E820		0x800000
++#define PCI_NO_E820		0x1000000
+
+ extern unsigned int pci_probe;
+ extern unsigned long pirq_table_addr;
+@@ -64,6 +66,8 @@ void pcibios_scan_specific_bus(int busn);
+
+ /* pci-irq.c */
+
++struct pci_dev;
++
+ struct irq_info {
+ 	u8 bus, devfn;			/* Bus, device and function */
+ 	struct {
+@@ -232,3 +236,9 @@ static inline void mmio_config_writel(void __iomem *pos, u32 val)
+ # define x86_default_pci_init_irq	NULL
+ # define x86_default_pci_fixup_irqs	NULL
+ #endif
++
++#if defined(CONFIG_PCI) && defined(CONFIG_ACPI)
++extern bool pci_use_e820;
++#else
++#define pci_use_e820 false
++#endif
+diff --git a/arch/x86/kernel/resource.c b/arch/x86/kernel/resource.c
+index 9b9fb7882c20..e8dc9bc327bd 100644
+--- a/arch/x86/kernel/resource.c
++++ b/arch/x86/kernel/resource.c
+@@ -1,6 +1,7 @@
+ // SPDX-License-Identifier: GPL-2.0
+ #include <linux/ioport.h>
+ #include <asm/e820/api.h>
++#include <asm/pci_x86.h>
+
+ static void resource_clip(struct resource *res, resource_size_t start,
+ 			  resource_size_t end)
+@@ -28,6 +29,9 @@ static void remove_e820_regions(struct resource *avail)
+ 	int i;
+ 	struct e820_entry *entry;
+
++	if (!pci_use_e820)
++		return;
++
+ 	for (i = 0; i < e820_table->nr_entries; i++) {
+ 		entry = &e820_table->entries[i];
+
+diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
+index 40ed44ead063..31aac8c787cf 100644
+--- a/arch/x86/kernel/setup.c
++++ b/arch/x86/kernel/setup.c
+@@ -20,6 +20,7 @@
+ #include <linux/root_dev.h>
+ #include <linux/hugetlb.h>
+ #include <linux/tboot.h>
++#include <linux/security.h>
+ #include <linux/usb/xhci-dbgp.h>
+ #include <linux/static_call.h>
+ #include <linux/swiotlb.h>
+@@ -929,6 +930,13 @@ void __init setup_arch(char **cmdline_p)
+ 	if (efi_enabled(EFI_BOOT))
+ 		efi_init();
+
++	efi_set_secure_boot(boot_params.secure_boot);
++
++#ifdef CONFIG_LOCK_DOWN_IN_EFI_SECURE_BOOT
++	if (efi_enabled(EFI_SECURE_BOOT))
++		security_lock_kernel_down("EFI Secure Boot mode", LOCKDOWN_INTEGRITY_MAX);
++#endif
++
+ 	dmi_setup();
+
+ 	/*
+@@ -1094,19 +1102,7 @@ void __init setup_arch(char **cmdline_p)
+ 	/* Allocate bigger log buffer */
+ 	setup_log_buf(1);
+
+-	if (efi_enabled(EFI_BOOT)) {
+-		switch (boot_params.secure_boot) {
+-		case efi_secureboot_mode_disabled:
+-			pr_info("Secure boot disabled\n");
+-			break;
+-		case efi_secureboot_mode_enabled:
+-			pr_info("Secure boot enabled\n");
+-			break;
+-		default:
+-			pr_info("Secure boot could not be determined\n");
+-			break;
+-		}
+-	}
++	efi_set_secure_boot(boot_params.secure_boot);
+
+ 	reserve_initrd();
+
+diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c
+index 948656069cdd..f357dac92610 100644
+--- a/arch/x86/pci/acpi.c
++++ b/arch/x86/pci/acpi.c
+@@ -1,4 +1,7 @@
+ // SPDX-License-Identifier: GPL-2.0
++
++#define pr_fmt(fmt) "PCI: " fmt
++
+ #include <linux/pci.h>
+ #include <linux/acpi.h>
+ #include <linux/init.h>
+@@ -21,6 +24,8 @@ struct pci_root_info {
+
+ static bool pci_use_crs = true;
+ static bool pci_ignore_seg = false;
++/* Consumed in arch/x86/kernel/resource.c */
++bool pci_use_e820 = false;
+
+ static int __init set_use_crs(const struct dmi_system_id *id)
+ {
+@@ -36,7 +41,7 @@ static int __init set_nouse_crs(const struct dmi_system_id *id)
+
+ static int __init set_ignore_seg(const struct dmi_system_id *id)
+ {
+-	printk(KERN_INFO "PCI: %s detected: ignoring ACPI _SEG\n", id->ident);
++	pr_info("%s detected: ignoring ACPI _SEG\n", id->ident);
+ 	pci_ignore_seg = true;
+ 	return 0;
+ }
+@@ -156,10 +161,35 @@ void __init pci_acpi_crs_quirks(void)
+ 	else if (pci_probe & PCI_USE__CRS)
+ 		pci_use_crs = true;
+
+-	printk(KERN_INFO "PCI: %s host bridge windows from ACPI; "
+-	       "if necessary, use \"pci=%s\" and report a bug\n",
+-	       pci_use_crs ? "Using" : "Ignoring",
+-	       pci_use_crs ? "nocrs" : "use_crs");
++	pr_info("%s host bridge windows from ACPI; if necessary, use \"pci=%s\" and report a bug\n",
++		pci_use_crs ? "Using" : "Ignoring",
++		pci_use_crs ? "nocrs" : "use_crs");
++
++	/*
++	 * Some BIOS-es contain a bug where they add addresses which map to
++	 * system RAM in the PCI host bridge window returned by the ACPI _CRS
++	 * method, see commit 4dc2287c1805 ("x86: avoid E820 regions when
++	 * allocating address space"). To avoid this Linux by default excludes
++	 * E820 reservations when allocating addresses since 2010.
++	 * In 2020 some systems have shown-up with E820 reservations which cover
++	 * the entire _CRS returned PCI host bridge window, causing all attempts
++	 * to assign memory to PCI BARs to fail if Linux uses E820 reservations.
++	 *
++	 * Ideally Linux would fully stop using E820 reservations, but then
++	 * the old systems this was added for will regress.
++	 * Instead keep the old behavior for old systems, while ignoring the
++	 * E820 reservations for any systems from now on.
++	 */
++	if (year >= 0 && year < 2018)
++		pci_use_e820 = true;
++
++	if (pci_probe & PCI_NO_E820)
++		pci_use_e820 = false;
++	else if (pci_probe & PCI_USE_E820)
++		pci_use_e820 = true;
++
++	pr_info("%s E820 reservations for host bridge windows\n",
++		pci_use_e820 ? "Using" : "Ignoring");
+ }
+
+ #ifdef	CONFIG_PCI_MMCONFIG
+@@ -334,9 +364,8 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
+ 		root->segment = domain = 0;
+
+ 	if (domain && !pci_domains_supported) {
+-		printk(KERN_WARNING "pci_bus %04x:%02x: "
+-		       "ignored (multiple domains not supported)\n",
+-		       domain, busnum);
++		pr_warn("pci_bus %04x:%02x: ignored (multiple domains not supported)\n",
++			domain, busnum);
+ 		return NULL;
+ 	}
+
+@@ -404,7 +433,7 @@ int __init pci_acpi_init(void)
+ 	if (acpi_noirq)
+ 		return -ENODEV;
+
+-	printk(KERN_INFO "PCI: Using ACPI for IRQ routing\n");
++	pr_info("Using ACPI for IRQ routing\n");
+ 	acpi_irq_penalty_init();
+ 	pcibios_enable_irq = acpi_pci_irq_enable;
+ 	pcibios_disable_irq = acpi_pci_irq_disable;
+@@ -416,7 +445,7 @@ int __init pci_acpi_init(void)
+ 		 * also do it here in case there are still broken drivers that
+ 		 * don't use pci_enable_device().
+ 		 */
+-		printk(KERN_INFO "PCI: Routing PCI interrupts for all devices because \"pci=routeirq\" specified\n");
++		pr_info("Routing PCI interrupts for all devices because \"pci=routeirq\" specified\n");
+ 		for_each_pci_dev(dev)
+ 			acpi_pci_irq_enable(dev);
+ 	}
+diff --git a/arch/x86/pci/common.c b/arch/x86/pci/common.c
+index 3507f456fcd0..091ec7e94fcb 100644
+--- a/arch/x86/pci/common.c
++++ b/arch/x86/pci/common.c
+@@ -595,6 +595,12 @@ char *__init pcibios_setup(char *str)
+ 	} else if (!strcmp(str, "nocrs")) {
+ 		pci_probe |= PCI_ROOT_NO_CRS;
+ 		return NULL;
++	} else if (!strcmp(str, "use_e820")) {
++		pci_probe |= PCI_USE_E820;
++		return NULL;
++	} else if (!strcmp(str, "no_e820")) {
++		pci_probe |= PCI_NO_E820;
++		return NULL;
+ #ifdef CONFIG_PHYS_ADDR_T_64BIT
+ 	} else if (!strcmp(str, "big_root_window")) {
+ 		pci_probe |= PCI_BIG_ROOT_WINDOW;
+diff --git a/crypto/rng.c b/crypto/rng.c
+index fea082b25fe4..50a9d040bed1 100644
+--- a/crypto/rng.c
++++ b/crypto/rng.c
+@@ -11,14 +11,17 @@
+ #include <linux/atomic.h>
+ #include <crypto/internal/rng.h>
+ #include <linux/err.h>
++#include <linux/fips.h>
++#include <linux/kernel.h>
+ #include <linux/module.h>
+ #include <linux/mutex.h>
+ #include <linux/random.h>
+ #include <linux/seq_file.h>
++#include <linux/sched.h>
++#include <linux/sched/signal.h>
+ #include <linux/slab.h>
+ #include <linux/string.h>
+ #include <linux/cryptouser.h>
+-#include <linux/compiler.h>
+ #include <net/netlink.h>
+
+ #include "internal.h"
+@@ -224,5 +227,73 @@ void crypto_unregister_rngs(struct rng_alg *algs, int count)
+ }
+ EXPORT_SYMBOL_GPL(crypto_unregister_rngs);
+
++static ssize_t crypto_devrandom_read(void __user *buf, size_t buflen)
++{
++	u8 tmp[256];
++	ssize_t ret;
++
++	if (!buflen)
++		return 0;
++
++	ret = crypto_get_default_rng();
++	if (ret)
++		return ret;
++
++	for (;;) {
++		int err;
++		int i;
++
++		i = min_t(int, buflen, sizeof(tmp));
++		err = crypto_rng_get_bytes(crypto_default_rng, tmp, i);
++		if (err) {
++			ret = err;
++			break;
++		}
++
++		if (copy_to_user(buf, tmp, i)) {
++			ret = -EFAULT;
++			break;
++		}
++
++		buflen -= i;
++		buf += i;
++		ret += i;
++
++		if (!buflen)
++			break;
++
++		if (need_resched()) {
++			if (signal_pending(current))
++				break;
++			schedule();
++		}
++	}
++
++	crypto_put_default_rng();
++	memzero_explicit(tmp, sizeof(tmp));
++
++	return ret;
++}
++
++static const struct random_extrng crypto_devrandom_rng = {
++	.extrng_read = crypto_devrandom_read,
++	.owner = THIS_MODULE,
++};
++
++static int __init crypto_rng_init(void)
++{
++	if (fips_enabled)
++		random_register_extrng(&crypto_devrandom_rng);
++	return 0;
++}
++
++static void __exit crypto_rng_exit(void)
++{
++	random_unregister_extrng();
++}
++
++late_initcall(crypto_rng_init);
++module_exit(crypto_rng_exit);
++
+ MODULE_LICENSE("GPL");
+ MODULE_DESCRIPTION("Random Number Generator");
+diff --git a/drivers/acpi/apei/hest.c b/drivers/acpi/apei/hest.c
+index 277f00b288d1..adbce15c273d 100644
+--- a/drivers/acpi/apei/hest.c
++++ b/drivers/acpi/apei/hest.c
+@@ -94,6 +94,14 @@ int apei_hest_parse(apei_hest_func_t func, void *data)
+ 	if (hest_disable || !hest_tab)
+ 		return -EINVAL;
+
++#ifdef CONFIG_ARM64
++	/* Ignore broken firmware */
++	if (!strncmp(hest_tab->header.oem_id, "HPE   ", 6) &&
++	    !strncmp(hest_tab->header.oem_table_id, "ProLiant", 8) &&
++	    MIDR_IMPLEMENTOR(read_cpuid_id()) == ARM_CPU_IMP_APM)
++		return -EINVAL;
++#endif
++
+ 	hest_hdr = (struct acpi_hest_header *)(hest_tab + 1);
+ 	for (i = 0; i < hest_tab->error_source_count; i++) {
+ 		len = hest_esrc_len(hest_hdr);
+diff --git a/drivers/acpi/irq.c b/drivers/acpi/irq.c
+index c68e694fca26..146cba5ae5bc 100644
+--- a/drivers/acpi/irq.c
++++ b/drivers/acpi/irq.c
+@@ -130,6 +130,7 @@ struct acpi_irq_parse_one_ctx {
+ 	unsigned int index;
+ 	unsigned long *res_flags;
+ 	struct irq_fwspec *fwspec;
++	bool skip_producer_check;
+ };
+
+ /**
+@@ -201,7 +202,8 @@ static acpi_status acpi_irq_parse_one_cb(struct acpi_resource *ares,
+ 		return AE_CTRL_TERMINATE;
+ 	case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
+ 		eirq = &ares->data.extended_irq;
+-		if (eirq->producer_consumer == ACPI_PRODUCER)
++		if (!ctx->skip_producer_check &&
++		    eirq->producer_consumer == ACPI_PRODUCER)
+ 			return AE_OK;
+ 		if (ctx->index >= eirq->interrupt_count) {
+ 			ctx->index -= eirq->interrupt_count;
+@@ -236,8 +238,19 @@ static acpi_status acpi_irq_parse_one_cb(struct acpi_resource *ares,
+ static int acpi_irq_parse_one(acpi_handle handle, unsigned int index,
+ 			      struct irq_fwspec *fwspec, unsigned long *flags)
+ {
+-	struct acpi_irq_parse_one_ctx ctx = { -EINVAL, index, flags, fwspec };
++	struct acpi_irq_parse_one_ctx ctx = { -EINVAL, index, flags, fwspec, false };
+
++	/*
++	 * Firmware on arm64-based HPE m400 platform incorrectly marks
++	 * its UART interrupt as ACPI_PRODUCER rather than ACPI_CONSUMER.
++	 * Don't do the producer/consumer check for that device.
++	 */
++	if (IS_ENABLED(CONFIG_ARM64)) {
++		struct acpi_device *adev = acpi_bus_get_acpi_device(handle);
++
++		if (adev && !strcmp(acpi_device_hid(adev), "APMC0D08"))
++			ctx.skip_producer_check = true;
++	}
+ 	acpi_walk_resources(handle, METHOD_NAME__CRS, acpi_irq_parse_one_cb, &ctx);
+ 	return ctx.rc;
+ }
+diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
+index 5b54c80b9d32..86c314f8d8a0 100644
+--- a/drivers/acpi/scan.c
++++ b/drivers/acpi/scan.c
+@@ -1720,6 +1720,15 @@ static bool acpi_device_enumeration_by_parent(struct acpi_device *device)
+ 	if (!acpi_match_device_ids(device, i2c_multi_instantiate_ids))
+ 		return false;
+
++	/*
++	 * Firmware on some arm64 X-Gene platforms will make the UART
++	 * device appear as both a UART and a slave of that UART. Just
++	 * bail out here for X-Gene UARTs.
++	 */
++	if (IS_ENABLED(CONFIG_ARM64) &&
++	    !strcmp(acpi_device_hid(device), "APMC0D08"))
++		return false;
++
+ 	INIT_LIST_HEAD(&resource_list);
+ 	acpi_dev_get_resources(device, &resource_list,
+ 			       acpi_check_serial_bus_slave,
+diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c
+index 5b3fa2cbe722..ad46d87e17e2 100644
+--- a/drivers/ata/libahci.c
++++ b/drivers/ata/libahci.c
+@@ -672,6 +672,24 @@ int ahci_stop_engine(struct ata_port *ap)
+ 	tmp &= ~PORT_CMD_START;
+ 	writel(tmp, port_mmio + PORT_CMD);
+
++#ifdef CONFIG_ARM64
++	/* Rev Ax of Cavium CN99XX needs a hack for port stop */
++	if (dev_is_pci(ap->host->dev) &&
++	    to_pci_dev(ap->host->dev)->vendor == 0x14e4 &&
++	    to_pci_dev(ap->host->dev)->device == 0x9027 &&
++	    midr_is_cpu_model_range(read_cpuid_id(),
++			MIDR_CPU_MODEL(ARM_CPU_IMP_BRCM, BRCM_CPU_PART_VULCAN),
++			MIDR_CPU_VAR_REV(0, 0),
++			MIDR_CPU_VAR_REV(0, MIDR_REVISION_MASK))) {
++		tmp = readl(hpriv->mmio + 0x8000);
++		udelay(100);
++		writel(tmp | (1 << 26), hpriv->mmio + 0x8000);
++		udelay(100);
++		writel(tmp & ~(1 << 26), hpriv->mmio + 0x8000);
++		dev_warn(ap->host->dev, "CN99XX SATA reset workaround applied\n");
++	}
++#endif
++
+ 	/* wait for engine to stop. This could be as long as 500 msec */
+ 	tmp = ata_wait_register(ap, port_mmio + PORT_CMD,
+ 				PORT_CMD_LIST_ON, PORT_CMD_LIST_ON, 1, 500);
+diff --git a/drivers/char/ipmi/ipmi_dmi.c b/drivers/char/ipmi/ipmi_dmi.c
+index bbf7029e224b..cf7faa970dd6 100644
+--- a/drivers/char/ipmi/ipmi_dmi.c
++++ b/drivers/char/ipmi/ipmi_dmi.c
+@@ -215,6 +215,21 @@ static int __init scan_for_dmi_ipmi(void)
+ {
+ 	const struct dmi_device *dev = NULL;
+
++#ifdef CONFIG_ARM64
++	/* RHEL-only
++	 * If this is ARM-based HPE m400, return now, because that platform
++	 * reports the host-side ipmi address as intel port-io space, which
++	 * does not exist in the ARM architecture.
++	 */
++	const char *dmistr = dmi_get_system_info(DMI_PRODUCT_NAME);
++
++	if (dmistr && (strcmp("ProLiant m400 Server", dmistr) == 0)) {
++		pr_debug("%s does not support host ipmi\n", dmistr);
++		return 0;
++	}
++	/* END RHEL-only */
++#endif
++
+ 	while ((dev = dmi_find_device(DMI_DEV_TYPE_IPMI, NULL, dev)))
+ 		dmi_decode_ipmi((const struct dmi_header *) dev->device_data);
+
+diff --git a/drivers/char/ipmi/ipmi_msghandler.c b/drivers/char/ipmi/ipmi_msghandler.c
+index a08f53f208bf..49942737cae0 100644
+--- a/drivers/char/ipmi/ipmi_msghandler.c
++++ b/drivers/char/ipmi/ipmi_msghandler.c
+@@ -35,6 +35,7 @@
+ #include <linux/uuid.h>
+ #include <linux/nospec.h>
+ #include <linux/vmalloc.h>
++#include <linux/dmi.h>
+ #include <linux/delay.h>
+
+ #define IPMI_DRIVER_VERSION "39.2"
+@@ -5164,8 +5165,21 @@ static int __init ipmi_init_msghandler_mod(void)
+ {
+ 	int rv;
+
+-	pr_info("version " IPMI_DRIVER_VERSION "\n");
++#ifdef CONFIG_ARM64
++	/* RHEL-only
++	 * If this is ARM-based HPE m400, return now, because that platform
++	 * reports the host-side ipmi address as intel port-io space, which
++	 * does not exist in the ARM architecture.
++	 */
++	const char *dmistr = dmi_get_system_info(DMI_PRODUCT_NAME);
+
++	if (dmistr && (strcmp("ProLiant m400 Server", dmistr) == 0)) {
++		pr_debug("%s does not support host ipmi\n", dmistr);
++		return -ENOSYS;
++	}
++	/* END RHEL-only */
++#endif
++	pr_info("version " IPMI_DRIVER_VERSION "\n");
+ 	mutex_lock(&ipmi_interfaces_mutex);
+ 	rv = ipmi_register_driver();
+ 	mutex_unlock(&ipmi_interfaces_mutex);
+diff --git a/drivers/char/random.c b/drivers/char/random.c
+index 605969ed0f96..4d51f1c67675 100644
+--- a/drivers/char/random.c
++++ b/drivers/char/random.c
+@@ -335,6 +335,7 @@
+ #include <linux/syscalls.h>
+ #include <linux/completion.h>
+ #include <linux/uuid.h>
++#include <linux/rcupdate.h>
+ #include <crypto/chacha.h>
+ #include <crypto/sha1.h>
+
+@@ -349,6 +350,11 @@
+
+ /* #define ADD_INTERRUPT_BENCH */
+
++/*
++ * Hook for external RNG.
++ */
++static const struct random_extrng __rcu *extrng;
++
+ /*
+  * Configuration information
+  */
+@@ -481,6 +487,9 @@ static int ratelimit_disable __read_mostly;
+ module_param_named(ratelimit_disable, ratelimit_disable, int, 0644);
+ MODULE_PARM_DESC(ratelimit_disable, "Disable random ratelimit suppression");
+
++static const struct file_operations extrng_random_fops;
++static const struct file_operations extrng_urandom_fops;
++
+ /**********************************************************************
+  *
+  * OS independent entropy store.   Here are the functions which handle
+@@ -1858,6 +1867,13 @@ random_poll(struct file *file, poll_table * wait)
+ 	return mask;
+ }
+
++static __poll_t
++extrng_poll(struct file *file, poll_table * wait)
++{
++	/* extrng pool is always full, always read, no writes */
++	return EPOLLIN | EPOLLRDNORM;
++}
++
+ static int
+ write_pool(struct entropy_store *r, const char __user *buffer, size_t count)
+ {
+@@ -1961,7 +1977,58 @@ static int random_fasync(int fd, struct file *filp, int on)
+ 	return fasync_helper(fd, filp, on, &fasync);
+ }
+
++static int random_open(struct inode *inode, struct file *filp)
++{
++	const struct random_extrng *rng;
++
++	rcu_read_lock();
++	rng = rcu_dereference(extrng);
++	if (rng && !try_module_get(rng->owner))
++		rng = NULL;
++	rcu_read_unlock();
++
++	if (!rng)
++		return 0;
++
++	filp->f_op = &extrng_random_fops;
++	filp->private_data = rng->owner;
++
++	return 0;
++}
++
++static int urandom_open(struct inode *inode, struct file *filp)
++{
++	const struct random_extrng *rng;
++
++	rcu_read_lock();
++	rng = rcu_dereference(extrng);
++	if (rng && !try_module_get(rng->owner))
++		rng = NULL;
++	rcu_read_unlock();
++
++	if (!rng)
++		return 0;
++
++	filp->f_op = &extrng_urandom_fops;
++	filp->private_data = rng->owner;
++
++	return 0;
++}
++
++static int extrng_release(struct inode *inode, struct file *filp)
++{
++	module_put(filp->private_data);
++	return 0;
++}
++
++static ssize_t
++extrng_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
++{
++	return rcu_dereference_raw(extrng)->extrng_read(buf, nbytes);
++}
++
+ const struct file_operations random_fops = {
++	.open  = random_open,
+ 	.read  = random_read,
+ 	.write = random_write,
+ 	.poll  = random_poll,
+@@ -1972,6 +2039,7 @@ const struct file_operations random_fops = {
+ };
+
+ const struct file_operations urandom_fops = {
++	.open  = urandom_open,
+ 	.read  = urandom_read,
+ 	.write = random_write,
+ 	.unlocked_ioctl = random_ioctl,
+@@ -1980,9 +2048,31 @@ const struct file_operations urandom_fops = {
+ 	.llseek = noop_llseek,
+ };
+
++static const struct file_operations extrng_random_fops = {
++	.open  = random_open,
++	.read  = extrng_read,
++	.write = random_write,
++	.poll  = extrng_poll,
++	.unlocked_ioctl = random_ioctl,
++	.fasync = random_fasync,
++	.llseek = noop_llseek,
++	.release = extrng_release,
++};
++
++static const struct file_operations extrng_urandom_fops = {
++	.open  = urandom_open,
++	.read  = extrng_read,
++	.write = random_write,
++	.unlocked_ioctl = random_ioctl,
++	.fasync = random_fasync,
++	.llseek = noop_llseek,
++	.release = extrng_release,
++};
++
+ SYSCALL_DEFINE3(getrandom, char __user *, buf, size_t, count,
+ 		unsigned int, flags)
+ {
++	const struct random_extrng *rng;
+ 	int ret;
+
+ 	if (flags & ~(GRND_NONBLOCK|GRND_RANDOM|GRND_INSECURE))
+@@ -1998,6 +2088,18 @@ SYSCALL_DEFINE3(getrandom, char __user *, buf, size_t, count,
+ 	if (count > INT_MAX)
+ 		count = INT_MAX;
+
++	rcu_read_lock();
++	rng = rcu_dereference(extrng);
++	if (rng && !try_module_get(rng->owner))
++		rng = NULL;
++	rcu_read_unlock();
++
++	if (rng) {
++		ret = rng->extrng_read(buf, count);
++		module_put(rng->owner);
++		return ret;
++	}
++
+ 	if (!(flags & GRND_INSECURE) && !crng_ready()) {
+ 		if (flags & GRND_NONBLOCK)
+ 			return -EAGAIN;
+@@ -2303,3 +2405,16 @@ void add_bootloader_randomness(const void *buf, unsigned int size)
+ 		add_device_randomness(buf, size);
+ }
+ EXPORT_SYMBOL_GPL(add_bootloader_randomness);
++
++void random_register_extrng(const struct random_extrng *rng)
++{
++	rcu_assign_pointer(extrng, rng);
++}
++EXPORT_SYMBOL_GPL(random_register_extrng);
++
++void random_unregister_extrng(void)
++{
++	RCU_INIT_POINTER(extrng, NULL);
++	synchronize_rcu();
++}
++EXPORT_SYMBOL_GPL(random_unregister_extrng);
+diff --git a/drivers/firmware/efi/Makefile b/drivers/firmware/efi/Makefile
+index c02ff25dd477..d860f8eb9a81 100644
+--- a/drivers/firmware/efi/Makefile
++++ b/drivers/firmware/efi/Makefile
+@@ -28,6 +28,7 @@ obj-$(CONFIG_EFI_FAKE_MEMMAP)		+= fake_map.o
+ obj-$(CONFIG_EFI_BOOTLOADER_CONTROL)	+= efibc.o
+ obj-$(CONFIG_EFI_TEST)			+= test/
+ obj-$(CONFIG_EFI_DEV_PATH_PARSER)	+= dev-path-parser.o
++obj-$(CONFIG_EFI)			+= secureboot.o
+ obj-$(CONFIG_APPLE_PROPERTIES)		+= apple-properties.o
+ obj-$(CONFIG_EFI_RCI2_TABLE)		+= rci2-table.o
+ obj-$(CONFIG_EFI_EMBEDDED_FIRMWARE)	+= embedded-firmware.o
+diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c
+index 847f33ffc4ae..363037f8eaf8 100644
+--- a/drivers/firmware/efi/efi.c
++++ b/drivers/firmware/efi/efi.c
+@@ -31,6 +31,7 @@
+ #include <linux/ucs2_string.h>
+ #include <linux/memblock.h>
+ #include <linux/security.h>
++#include <linux/bsearch.h>
+
+ #include <asm/early_ioremap.h>
+
+@@ -841,40 +842,101 @@ int efi_mem_type(unsigned long phys_addr)
+ }
+ #endif
+
++struct efi_error_code {
++	efi_status_t status;
++	int errno;
++	const char *description;
++};
++
++static const struct efi_error_code efi_error_codes[] = {
++	{ EFI_SUCCESS, 0, "Success"},
++#if 0
++	{ EFI_LOAD_ERROR, -EPICK_AN_ERRNO, "Load Error"},
++#endif
++	{ EFI_INVALID_PARAMETER, -EINVAL, "Invalid Parameter"},
++	{ EFI_UNSUPPORTED, -ENOSYS, "Unsupported"},
++	{ EFI_BAD_BUFFER_SIZE, -ENOSPC, "Bad Buffer Size"},
++	{ EFI_BUFFER_TOO_SMALL, -ENOSPC, "Buffer Too Small"},
++	{ EFI_NOT_READY, -EAGAIN, "Not Ready"},
++	{ EFI_DEVICE_ERROR, -EIO, "Device Error"},
++	{ EFI_WRITE_PROTECTED, -EROFS, "Write Protected"},
++	{ EFI_OUT_OF_RESOURCES, -ENOMEM, "Out of Resources"},
++#if 0
++	{ EFI_VOLUME_CORRUPTED, -EPICK_AN_ERRNO, "Volume Corrupt"},
++	{ EFI_VOLUME_FULL, -EPICK_AN_ERRNO, "Volume Full"},
++	{ EFI_NO_MEDIA, -EPICK_AN_ERRNO, "No Media"},
++	{ EFI_MEDIA_CHANGED, -EPICK_AN_ERRNO, "Media changed"},
++#endif
++	{ EFI_NOT_FOUND, -ENOENT, "Not Found"},
++#if 0
++	{ EFI_ACCESS_DENIED, -EPICK_AN_ERRNO, "Access Denied"},
++	{ EFI_NO_RESPONSE, -EPICK_AN_ERRNO, "No Response"},
++	{ EFI_NO_MAPPING, -EPICK_AN_ERRNO, "No mapping"},
++	{ EFI_TIMEOUT, -EPICK_AN_ERRNO, "Time out"},
++	{ EFI_NOT_STARTED, -EPICK_AN_ERRNO, "Not started"},
++	{ EFI_ALREADY_STARTED, -EPICK_AN_ERRNO, "Already started"},
++#endif
++	{ EFI_ABORTED, -EINTR, "Aborted"},
++#if 0
++	{ EFI_ICMP_ERROR, -EPICK_AN_ERRNO, "ICMP Error"},
++	{ EFI_TFTP_ERROR, -EPICK_AN_ERRNO, "TFTP Error"},
++	{ EFI_PROTOCOL_ERROR, -EPICK_AN_ERRNO, "Protocol Error"},
++	{ EFI_INCOMPATIBLE_VERSION, -EPICK_AN_ERRNO, "Incompatible Version"},
++#endif
++	{ EFI_SECURITY_VIOLATION, -EACCES, "Security Policy Violation"},
++#if 0
++	{ EFI_CRC_ERROR, -EPICK_AN_ERRNO, "CRC Error"},
++	{ EFI_END_OF_MEDIA, -EPICK_AN_ERRNO, "End of Media"},
++	{ EFI_END_OF_FILE, -EPICK_AN_ERRNO, "End of File"},
++	{ EFI_INVALID_LANGUAGE, -EPICK_AN_ERRNO, "Invalid Languages"},
++	{ EFI_COMPROMISED_DATA, -EPICK_AN_ERRNO, "Compromised Data"},
++
++	// warnings
++	{ EFI_WARN_UNKOWN_GLYPH, -EPICK_AN_ERRNO, "Warning Unknown Glyph"},
++	{ EFI_WARN_DELETE_FAILURE, -EPICK_AN_ERRNO, "Warning Delete Failure"},
++	{ EFI_WARN_WRITE_FAILURE, -EPICK_AN_ERRNO, "Warning Write Failure"},
++	{ EFI_WARN_BUFFER_TOO_SMALL, -EPICK_AN_ERRNO, "Warning Buffer Too Small"},
++#endif
++};
++
++static int
++efi_status_cmp_bsearch(const void *key, const void *item)
++{
++	u64 status = (u64)(uintptr_t)key;
++	struct efi_error_code *code = (struct efi_error_code *)item;
++
++	if (status < code->status)
++		return -1;
++	if (status > code->status)
++		return 1;
++	return 0;
++}
++
+ int efi_status_to_err(efi_status_t status)
+ {
+-	int err;
+-
+-	switch (status) {
+-	case EFI_SUCCESS:
+-		err = 0;
+-		break;
+-	case EFI_INVALID_PARAMETER:
+-		err = -EINVAL;
+-		break;
+-	case EFI_OUT_OF_RESOURCES:
+-		err = -ENOSPC;
+-		break;
+-	case EFI_DEVICE_ERROR:
+-		err = -EIO;
+-		break;
+-	case EFI_WRITE_PROTECTED:
+-		err = -EROFS;
+-		break;
+-	case EFI_SECURITY_VIOLATION:
+-		err = -EACCES;
+-		break;
+-	case EFI_NOT_FOUND:
+-		err = -ENOENT;
+-		break;
+-	case EFI_ABORTED:
+-		err = -EINTR;
+-		break;
+-	default:
+-		err = -EINVAL;
+-	}
++	struct efi_error_code *found;
++	size_t num = sizeof(efi_error_codes) / sizeof(struct efi_error_code);
+
+-	return err;
++	found = bsearch((void *)(uintptr_t)status, efi_error_codes,
++			sizeof(struct efi_error_code), num,
++			efi_status_cmp_bsearch);
++	if (!found)
++		return -EINVAL;
++	return found->errno;
++}
++
++const char *
++efi_status_to_str(efi_status_t status)
++{
++	struct efi_error_code *found;
++	size_t num = sizeof(efi_error_codes) / sizeof(struct efi_error_code);
++
++	found = bsearch((void *)(uintptr_t)status, efi_error_codes,
++			sizeof(struct efi_error_code), num,
++			efi_status_cmp_bsearch);
++	if (!found)
++		return "Unknown error code";
++	return found->description;
+ }
+
+ static DEFINE_SPINLOCK(efi_mem_reserve_persistent_lock);
+diff --git a/drivers/firmware/efi/secureboot.c b/drivers/firmware/efi/secureboot.c
+new file mode 100644
+index 000000000000..de0a3714a5d4
+--- /dev/null
++++ b/drivers/firmware/efi/secureboot.c
+@@ -0,0 +1,38 @@
++/* Core kernel secure boot support.
++ *
++ * Copyright (C) 2017 Red Hat, Inc. All Rights Reserved.
++ * Written by David Howells (dhowells@redhat.com)
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public Licence
++ * as published by the Free Software Foundation; either version
++ * 2 of the Licence, or (at your option) any later version.
++ */
++
++#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
++
++#include <linux/efi.h>
++#include <linux/kernel.h>
++#include <linux/printk.h>
++
++/*
++ * Decide what to do when UEFI secure boot mode is enabled.
++ */
++void __init efi_set_secure_boot(enum efi_secureboot_mode mode)
++{
++	if (efi_enabled(EFI_BOOT)) {
++		switch (mode) {
++		case efi_secureboot_mode_disabled:
++			pr_info("Secure boot disabled\n");
++			break;
++		case efi_secureboot_mode_enabled:
++			set_bit(EFI_SECURE_BOOT, &efi.flags);
++			pr_info("Secure boot enabled\n");
++			break;
++		default:
++			pr_warn("Secure boot could not be determined (mode %u)\n",
++				   mode);
++			break;
++		}
++	}
++}
+diff --git a/drivers/hid/hid-rmi.c b/drivers/hid/hid-rmi.c
+index 311eee599ce9..2460c6bd46f8 100644
+--- a/drivers/hid/hid-rmi.c
++++ b/drivers/hid/hid-rmi.c
+@@ -322,19 +322,12 @@ static int rmi_input_event(struct hid_device *hdev, u8 *data, int size)
+ {
+ 	struct rmi_data *hdata = hid_get_drvdata(hdev);
+ 	struct rmi_device *rmi_dev = hdata->xport.rmi_dev;
+-	unsigned long flags;
+
+ 	if (!(test_bit(RMI_STARTED, &hdata->flags)))
+ 		return 0;
+
+-	local_irq_save(flags);
+-
+ 	rmi_set_attn_data(rmi_dev, data[1], &data[2], size - 2);
+
+-	generic_handle_irq(hdata->rmi_irq);
+-
+-	local_irq_restore(flags);
+-
+ 	return 1;
+ }
+
+@@ -591,56 +584,6 @@ static const struct rmi_transport_ops hid_rmi_ops = {
+ 	.reset		= rmi_hid_reset,
+ };
+
+-static void rmi_irq_teardown(void *data)
+-{
+-	struct rmi_data *hdata = data;
+-	struct irq_domain *domain = hdata->domain;
+-
+-	if (!domain)
+-		return;
+-
+-	irq_dispose_mapping(irq_find_mapping(domain, 0));
+-
+-	irq_domain_remove(domain);
+-	hdata->domain = NULL;
+-	hdata->rmi_irq = 0;
+-}
+-
+-static int rmi_irq_map(struct irq_domain *h, unsigned int virq,
+-		       irq_hw_number_t hw_irq_num)
+-{
+-	irq_set_chip_and_handler(virq, &dummy_irq_chip, handle_simple_irq);
+-
+-	return 0;
+-}
+-
+-static const struct irq_domain_ops rmi_irq_ops = {
+-	.map = rmi_irq_map,
+-};
+-
+-static int rmi_setup_irq_domain(struct hid_device *hdev)
+-{
+-	struct rmi_data *hdata = hid_get_drvdata(hdev);
+-	int ret;
+-
+-	hdata->domain = irq_domain_create_linear(hdev->dev.fwnode, 1,
+-						 &rmi_irq_ops, hdata);
+-	if (!hdata->domain)
+-		return -ENOMEM;
+-
+-	ret = devm_add_action_or_reset(&hdev->dev, &rmi_irq_teardown, hdata);
+-	if (ret)
+-		return ret;
+-
+-	hdata->rmi_irq = irq_create_mapping(hdata->domain, 0);
+-	if (hdata->rmi_irq <= 0) {
+-		hid_err(hdev, "Can't allocate an IRQ\n");
+-		return hdata->rmi_irq < 0 ? hdata->rmi_irq : -ENXIO;
+-	}
+-
+-	return 0;
+-}
+-
+ static int rmi_probe(struct hid_device *hdev, const struct hid_device_id *id)
+ {
+ 	struct rmi_data *data = NULL;
+@@ -713,18 +656,11 @@ static int rmi_probe(struct hid_device *hdev, const struct hid_device_id *id)
+
+ 	mutex_init(&data->page_mutex);
+
+-	ret = rmi_setup_irq_domain(hdev);
+-	if (ret) {
+-		hid_err(hdev, "failed to allocate IRQ domain\n");
+-		return ret;
+-	}
+-
+ 	if (data->device_flags & RMI_DEVICE_HAS_PHYS_BUTTONS)
+ 		rmi_hid_pdata.gpio_data.disable = true;
+
+ 	data->xport.dev = hdev->dev.parent;
+ 	data->xport.pdata = rmi_hid_pdata;
+-	data->xport.pdata.irq = data->rmi_irq;
+ 	data->xport.proto_name = "hid";
+ 	data->xport.ops = &hid_rmi_ops;
+
+diff --git a/drivers/hwtracing/coresight/coresight-etm4x-core.c b/drivers/hwtracing/coresight/coresight-etm4x-core.c
+index e24252eaf8e4..368d64adeee8 100644
+--- a/drivers/hwtracing/coresight/coresight-etm4x-core.c
++++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c
+@@ -9,6 +9,7 @@
+ #include <linux/init.h>
+ #include <linux/types.h>
+ #include <linux/device.h>
++#include <linux/dmi.h>
+ #include <linux/io.h>
+ #include <linux/err.h>
+ #include <linux/fs.h>
+@@ -2105,6 +2106,16 @@ static const struct amba_id etm4_ids[] = {
+ 	{},
+ };
+
++static const struct dmi_system_id broken_coresight[] = {
++	{
++		.matches = {
++			DMI_MATCH(DMI_SYS_VENDOR, "HPE"),
++			DMI_MATCH(DMI_PRODUCT_NAME, "Apollo 70"),
++		},
++	},
++	{ }	/* terminating entry */
++};
++
+ MODULE_DEVICE_TABLE(amba, etm4_ids);
+
+ static struct amba_driver etm4x_amba_driver = {
+@@ -2138,6 +2149,11 @@ static int __init etm4x_init(void)
+ {
+ 	int ret;
+
++	if (dmi_check_system(broken_coresight)) {
++		pr_info("ETM4 disabled due to firmware bug\n");
++		return 0;
++	}
++
+ 	ret = etm4_pm_setup();
+
+ 	/* etm4_pm_setup() does its own cleanup - exit on error */
+@@ -2164,6 +2180,9 @@ static int __init etm4x_init(void)
+
+ static void __exit etm4x_exit(void)
+ {
++	if (dmi_check_system(broken_coresight))
++		return;
++
+ 	amba_driver_unregister(&etm4x_amba_driver);
+ 	platform_driver_unregister(&etm4_platform_driver);
+ 	etm4_pm_clear();
+diff --git a/drivers/input/rmi4/rmi_driver.c b/drivers/input/rmi4/rmi_driver.c
+index 258d5fe3d395..f7298e3dc8f3 100644
+--- a/drivers/input/rmi4/rmi_driver.c
++++ b/drivers/input/rmi4/rmi_driver.c
+@@ -182,34 +182,47 @@ void rmi_set_attn_data(struct rmi_device *rmi_dev, unsigned long irq_status,
+ 	attn_data.data = fifo_data;
+
+ 	kfifo_put(&drvdata->attn_fifo, attn_data);
++
++	schedule_work(&drvdata->attn_work);
+ }
+ EXPORT_SYMBOL_GPL(rmi_set_attn_data);
+
+-static irqreturn_t rmi_irq_fn(int irq, void *dev_id)
++static void attn_callback(struct work_struct *work)
+ {
+-	struct rmi_device *rmi_dev = dev_id;
+-	struct rmi_driver_data *drvdata = dev_get_drvdata(&rmi_dev->dev);
++	struct rmi_driver_data *drvdata = container_of(work,
++							struct rmi_driver_data,
++							attn_work);
+ 	struct rmi4_attn_data attn_data = {0};
+ 	int ret, count;
+
+ 	count = kfifo_get(&drvdata->attn_fifo, &attn_data);
+-	if (count) {
+-		*(drvdata->irq_status) = attn_data.irq_status;
+-		drvdata->attn_data = attn_data;
+-	}
++	if (!count)
++		return;
+
+-	ret = rmi_process_interrupt_requests(rmi_dev);
++	*(drvdata->irq_status) = attn_data.irq_status;
++	drvdata->attn_data = attn_data;
++
++	ret = rmi_process_interrupt_requests(drvdata->rmi_dev);
+ 	if (ret)
+-		rmi_dbg(RMI_DEBUG_CORE, &rmi_dev->dev,
++		rmi_dbg(RMI_DEBUG_CORE, &drvdata->rmi_dev->dev,
+ 			"Failed to process interrupt request: %d\n", ret);
+
+-	if (count) {
+-		kfree(attn_data.data);
+-		drvdata->attn_data.data = NULL;
+-	}
++	kfree(attn_data.data);
++	drvdata->attn_data.data = NULL;
+
+ 	if (!kfifo_is_empty(&drvdata->attn_fifo))
+-		return rmi_irq_fn(irq, dev_id);
++		schedule_work(&drvdata->attn_work);
++}
++
++static irqreturn_t rmi_irq_fn(int irq, void *dev_id)
++{
++	struct rmi_device *rmi_dev = dev_id;
++	int ret;
++
++	ret = rmi_process_interrupt_requests(rmi_dev);
++	if (ret)
++		rmi_dbg(RMI_DEBUG_CORE, &rmi_dev->dev,
++			"Failed to process interrupt request: %d\n", ret);
+
+ 	return IRQ_HANDLED;
+ }
+@@ -217,7 +230,6 @@ static irqreturn_t rmi_irq_fn(int irq, void *dev_id)
+ static int rmi_irq_init(struct rmi_device *rmi_dev)
+ {
+ 	struct rmi_device_platform_data *pdata = rmi_get_platform_data(rmi_dev);
+-	struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev);
+ 	int irq_flags = irq_get_trigger_type(pdata->irq);
+ 	int ret;
+
+@@ -235,8 +247,6 @@ static int rmi_irq_init(struct rmi_device *rmi_dev)
+ 		return ret;
+ 	}
+
+-	data->enabled = true;
+-
+ 	return 0;
+ }
+
+@@ -886,23 +896,27 @@ void rmi_enable_irq(struct rmi_device *rmi_dev, bool clear_wake)
+ 	if (data->enabled)
+ 		goto out;
+
+-	enable_irq(irq);
+-	data->enabled = true;
+-	if (clear_wake && device_may_wakeup(rmi_dev->xport->dev)) {
+-		retval = disable_irq_wake(irq);
+-		if (retval)
+-			dev_warn(&rmi_dev->dev,
+-				 "Failed to disable irq for wake: %d\n",
+-				 retval);
+-	}
++	if (irq) {
++		enable_irq(irq);
++		data->enabled = true;
++		if (clear_wake && device_may_wakeup(rmi_dev->xport->dev)) {
++			retval = disable_irq_wake(irq);
++			if (retval)
++				dev_warn(&rmi_dev->dev,
++					 "Failed to disable irq for wake: %d\n",
++					 retval);
++		}
+
+-	/*
+-	 * Call rmi_process_interrupt_requests() after enabling irq,
+-	 * otherwise we may lose interrupt on edge-triggered systems.
+-	 */
+-	irq_flags = irq_get_trigger_type(pdata->irq);
+-	if (irq_flags & IRQ_TYPE_EDGE_BOTH)
+-		rmi_process_interrupt_requests(rmi_dev);
++		/*
++		 * Call rmi_process_interrupt_requests() after enabling irq,
++		 * otherwise we may lose interrupt on edge-triggered systems.
++		 */
++		irq_flags = irq_get_trigger_type(pdata->irq);
++		if (irq_flags & IRQ_TYPE_EDGE_BOTH)
++			rmi_process_interrupt_requests(rmi_dev);
++	} else {
++		data->enabled = true;
++	}
+
+ out:
+ 	mutex_unlock(&data->enabled_mutex);
+@@ -922,20 +936,22 @@ void rmi_disable_irq(struct rmi_device *rmi_dev, bool enable_wake)
+ 		goto out;
+
+ 	data->enabled = false;
+-	disable_irq(irq);
+-	if (enable_wake && device_may_wakeup(rmi_dev->xport->dev)) {
+-		retval = enable_irq_wake(irq);
+-		if (retval)
+-			dev_warn(&rmi_dev->dev,
+-				 "Failed to enable irq for wake: %d\n",
+-				 retval);
+-	}
+-
+-	/* make sure the fifo is clean */
+-	while (!kfifo_is_empty(&data->attn_fifo)) {
+-		count = kfifo_get(&data->attn_fifo, &attn_data);
+-		if (count)
+-			kfree(attn_data.data);
++	if (irq) {
++		disable_irq(irq);
++		if (enable_wake && device_may_wakeup(rmi_dev->xport->dev)) {
++			retval = enable_irq_wake(irq);
++			if (retval)
++				dev_warn(&rmi_dev->dev,
++					 "Failed to enable irq for wake: %d\n",
++					 retval);
++		}
++	} else {
++		/* make sure the fifo is clean */
++		while (!kfifo_is_empty(&data->attn_fifo)) {
++			count = kfifo_get(&data->attn_fifo, &attn_data);
++			if (count)
++				kfree(attn_data.data);
++		}
+ 	}
+
+ out:
+@@ -981,6 +997,8 @@ static int rmi_driver_remove(struct device *dev)
+ 	irq_domain_remove(data->irqdomain);
+ 	data->irqdomain = NULL;
+
++	cancel_work_sync(&data->attn_work);
++
+ 	rmi_f34_remove_sysfs(rmi_dev);
+ 	rmi_free_function_list(rmi_dev);
+
+@@ -1219,9 +1237,15 @@ static int rmi_driver_probe(struct device *dev)
+ 		}
+ 	}
+
+-	retval = rmi_irq_init(rmi_dev);
+-	if (retval < 0)
+-		goto err_destroy_functions;
++	if (pdata->irq) {
++		retval = rmi_irq_init(rmi_dev);
++		if (retval < 0)
++			goto err_destroy_functions;
++	}
++
++	data->enabled = true;
++
++	INIT_WORK(&data->attn_work, attn_callback);
+
+ 	if (data->f01_container->dev.driver) {
+ 		/* Driver already bound, so enable ATTN now. */
+diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
+index 3303d707bab4..372edaaafaa1 100644
+--- a/drivers/iommu/iommu.c
++++ b/drivers/iommu/iommu.c
+@@ -7,6 +7,7 @@
+ #define pr_fmt(fmt)    "iommu: " fmt
+
+ #include <linux/device.h>
++#include <linux/dmi.h>
+ #include <linux/dma-iommu.h>
+ #include <linux/kernel.h>
+ #include <linux/bits.h>
+@@ -3118,6 +3119,27 @@ u32 iommu_sva_get_pasid(struct iommu_sva *handle)
+ }
+ EXPORT_SYMBOL_GPL(iommu_sva_get_pasid);
+
++#ifdef CONFIG_ARM64
++static int __init iommu_quirks(void)
++{
++	const char *vendor, *name;
++
++	vendor = dmi_get_system_info(DMI_SYS_VENDOR);
++	name = dmi_get_system_info(DMI_PRODUCT_NAME);
++
++	if (vendor &&
++	    (strncmp(vendor, "GIGABYTE", 8) == 0 && name &&
++	     (strncmp(name, "R120", 4) == 0 ||
++	      strncmp(name, "R270", 4) == 0))) {
++		pr_warn("Gigabyte %s detected, force iommu passthrough mode", name);
++		iommu_def_domain_type = IOMMU_DOMAIN_IDENTITY;
++	}
++
++	return 0;
++}
++arch_initcall(iommu_quirks);
++#endif
++
+ /*
+  * Changes the default domain of an iommu group that has *only* one device
+  *
+diff --git a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c
+index 404cbf60d3f2..da1d185f6d22 100644
+--- a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c
++++ b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c
+@@ -559,6 +559,11 @@ int hw_atl_utils_fw_rpc_wait(struct aq_hw_s *self,
+ 			goto err_exit;
+
+ 		if (fw.len == 0xFFFFU) {
++			if (sw.len > sizeof(self->rpc)) {
++				printk(KERN_INFO "Invalid sw len: %x\n", sw.len);
++				err = -EINVAL;
++				goto err_exit;
++			}
+ 			err = hw_atl_utils_fw_rpc_call(self, sw.len);
+ 			if (err < 0)
+ 				goto err_exit;
+@@ -567,6 +572,11 @@ int hw_atl_utils_fw_rpc_wait(struct aq_hw_s *self,
+
+ 	if (rpc) {
+ 		if (fw.len) {
++			if (fw.len > sizeof(self->rpc)) {
++				printk(KERN_INFO "Invalid fw len: %x\n", fw.len);
++				err = -EINVAL;
++				goto err_exit;
++			}
+ 			err =
+ 			hw_atl_utils_fw_downld_dwords(self,
+ 						      self->rpc_addr,
+diff --git a/drivers/net/wireless/marvell/mwifiex/usb.c b/drivers/net/wireless/marvell/mwifiex/usb.c
+index 9736aa0ab7fd..8f01fcbe9396 100644
+--- a/drivers/net/wireless/marvell/mwifiex/usb.c
++++ b/drivers/net/wireless/marvell/mwifiex/usb.c
+@@ -130,7 +130,8 @@ static int mwifiex_usb_recv(struct mwifiex_adapter *adapter,
+ 		default:
+ 			mwifiex_dbg(adapter, ERROR,
+ 				    "unknown recv_type %#x\n", recv_type);
+-			return -1;
++			ret = -1;
++			goto exit_restore_skb;
+ 		}
+ 		break;
+ 	case MWIFIEX_USB_EP_DATA:
+diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
+index f8dd664b2eda..0ff9ea8340e4 100644
+--- a/drivers/nvme/host/core.c
++++ b/drivers/nvme/host/core.c
+@@ -262,6 +262,9 @@ static void nvme_delete_ctrl_sync(struct nvme_ctrl *ctrl)
+
+ static blk_status_t nvme_error_status(u16 status)
+ {
++	if (unlikely(status & NVME_SC_DNR))
++		return BLK_STS_TARGET;
++
+ 	switch (status & 0x7ff) {
+ 	case NVME_SC_SUCCESS:
+ 		return BLK_STS_OK;
+@@ -321,6 +324,7 @@ enum nvme_disposition {
+ 	COMPLETE,
+ 	RETRY,
+ 	FAILOVER,
++	FAILUP,
+ };
+
+ static inline enum nvme_disposition nvme_decide_disposition(struct request *req)
+@@ -328,15 +332,16 @@ static inline enum nvme_disposition nvme_decide_disposition(struct request *req)
+ 	if (likely(nvme_req(req)->status == 0))
+ 		return COMPLETE;
+
+-	if (blk_noretry_request(req) ||
++	if ((req->cmd_flags & (REQ_FAILFAST_DEV | REQ_FAILFAST_DRIVER)) ||
+ 	    (nvme_req(req)->status & NVME_SC_DNR) ||
+ 	    nvme_req(req)->retries >= nvme_max_retries)
+ 		return COMPLETE;
+
+-	if (req->cmd_flags & REQ_NVME_MPATH) {
++	if (req->cmd_flags & (REQ_NVME_MPATH | REQ_FAILFAST_TRANSPORT)) {
+ 		if (nvme_is_path_error(nvme_req(req)->status) ||
+ 		    blk_queue_dying(req->q))
+-			return FAILOVER;
++			return (req->cmd_flags & REQ_NVME_MPATH) ?
++				FAILOVER : FAILUP;
+ 	} else {
+ 		if (blk_queue_dying(req->q))
+ 			return COMPLETE;
+@@ -358,6 +363,14 @@ static inline void nvme_end_req(struct request *req)
+ 	blk_mq_end_request(req, status);
+ }
+
++static inline void nvme_failup_req(struct request *req)
++{
++	nvme_update_ana(req);
++
++	nvme_req(req)->status = NVME_SC_HOST_PATH_ERROR;
++	nvme_end_req(req);
++}
++
+ void nvme_complete_rq(struct request *req)
+ {
+ 	trace_nvme_complete_rq(req);
+@@ -376,6 +389,9 @@ void nvme_complete_rq(struct request *req)
+ 	case FAILOVER:
+ 		nvme_failover_req(req);
+ 		return;
++	case FAILUP:
++		nvme_failup_req(req);
++		return;
+ 	}
+ }
+ EXPORT_SYMBOL_GPL(nvme_complete_rq);
+diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c
+index 2f76969408b2..021a4176b321 100644
+--- a/drivers/nvme/host/multipath.c
++++ b/drivers/nvme/host/multipath.c
+@@ -65,14 +65,10 @@ bool nvme_mpath_set_disk_name(struct nvme_ns *ns, char *disk_name, int *flags)
+ 	return true;
+ }
+
+-void nvme_failover_req(struct request *req)
++void nvme_update_ana(struct request *req)
+ {
+ 	struct nvme_ns *ns = req->q->queuedata;
+ 	u16 status = nvme_req(req)->status & 0x7ff;
+-	unsigned long flags;
+-	struct bio *bio;
+-
+-	nvme_mpath_clear_current_path(ns);
+
+ 	/*
+ 	 * If we got back an ANA error, we know the controller is alive but not
+@@ -83,6 +79,16 @@ void nvme_failover_req(struct request *req)
+ 		set_bit(NVME_NS_ANA_PENDING, &ns->flags);
+ 		queue_work(nvme_wq, &ns->ctrl->ana_work);
+ 	}
++}
++
++void nvme_failover_req(struct request *req)
++{
++	struct nvme_ns *ns = req->q->queuedata;
++	unsigned long flags;
++	struct bio *bio;
++
++	nvme_mpath_clear_current_path(ns);
++	nvme_update_ana(req);
+
+ 	spin_lock_irqsave(&ns->head->requeue_lock, flags);
+ 	for (bio = req->bio; bio; bio = bio->bi_next)
+@@ -813,8 +819,7 @@ int nvme_mpath_init_identify(struct nvme_ctrl *ctrl, struct nvme_id_ctrl *id)
+ 	int error = 0;
+
+ 	/* check if multipath is enabled and we have the capability */
+-	if (!multipath || !ctrl->subsys ||
+-	    !(ctrl->subsys->cmic & NVME_CTRL_CMIC_ANA))
++	if (!ctrl->subsys || !(ctrl->subsys->cmic & NVME_CTRL_CMIC_ANA))
+ 		return 0;
+
+ 	if (!ctrl->max_namespaces ||
+diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
+index ed79a6c7e804..961dc67d7261 100644
+--- a/drivers/nvme/host/nvme.h
++++ b/drivers/nvme/host/nvme.h
+@@ -746,6 +746,7 @@ void nvme_mpath_wait_freeze(struct nvme_subsystem *subsys);
+ void nvme_mpath_start_freeze(struct nvme_subsystem *subsys);
+ bool nvme_mpath_set_disk_name(struct nvme_ns *ns, char *disk_name, int *flags);
+ void nvme_failover_req(struct request *req);
++void nvme_update_ana(struct request *req);
+ void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl);
+ int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl,struct nvme_ns_head *head);
+ void nvme_mpath_add_disk(struct nvme_ns *ns, struct nvme_id_ns *id);
+@@ -784,6 +785,9 @@ static inline bool nvme_mpath_set_disk_name(struct nvme_ns *ns, char *disk_name,
+ static inline void nvme_failover_req(struct request *req)
+ {
+ }
++static inline void nvme_update_ana(struct request *req)
++{
++}
+ static inline void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl)
+ {
+ }
+diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
+index 208fa03acdda..88cfaa8ac3b3 100644
+--- a/drivers/pci/quirks.c
++++ b/drivers/pci/quirks.c
+@@ -4269,6 +4269,30 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_BROADCOM, 0x9000,
+ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_BROADCOM, 0x9084,
+ 				quirk_bridge_cavm_thrx2_pcie_root);
+
++/*
++ * PCI BAR 5 is not setup correctly for the on-board AHCI controller
++ * on Broadcom's Vulcan processor. Added a quirk to fix BAR 5 by
++ * using BAR 4's resources which are populated correctly and NOT
++ * actually used by the AHCI controller.
++ */
++static void quirk_fix_vulcan_ahci_bars(struct pci_dev *dev)
++{
++	struct resource *r =  &dev->resource[4];
++
++	if (!(r->flags & IORESOURCE_MEM) || (r->start == 0))
++		return;
++
++	/* Set BAR5 resource to BAR4 */
++	dev->resource[5] = *r;
++
++	/* Update BAR5 in pci config space */
++	pci_write_config_dword(dev, PCI_BASE_ADDRESS_5, r->start);
++
++	/* Clear BAR4's resource */
++	memset(r, 0, sizeof(*r));
++}
++DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_BROADCOM, 0x9027, quirk_fix_vulcan_ahci_bars);
++
+ /*
+  * Intersil/Techwell TW686[4589]-based video capture cards have an empty (zero)
+  * class code.  Fix it.
+diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
+index 86658a81d284..5647f4756e97 100644
+--- a/drivers/usb/core/hub.c
++++ b/drivers/usb/core/hub.c
+@@ -5657,6 +5657,13 @@ static void hub_event(struct work_struct *work)
+ 			(u16) hub->change_bits[0],
+ 			(u16) hub->event_bits[0]);
+
++	/* Don't disconnect USB-SATA on TrimSlice */
++	if (strcmp(dev_name(hdev->bus->controller), "tegra-ehci.0") == 0) {
++		if ((hdev->state == 7) && (hub->change_bits[0] == 0) &&
++				(hub->event_bits[0] == 0x2))
++			hub->event_bits[0] = 0;
++	}
++
+ 	/* Lock the device, then check to see if we were
+ 	 * disconnected while waiting for the lock to succeed. */
+ 	usb_lock_device(hdev);
+diff --git a/drivers/usb/host/xhci-tegra.c b/drivers/usb/host/xhci-tegra.c
+index 1bf494b649bd..c8af2cd2216d 100644
+--- a/drivers/usb/host/xhci-tegra.c
++++ b/drivers/usb/host/xhci-tegra.c
+@@ -1400,6 +1400,7 @@ static void tegra_xusb_deinit_usb_phy(struct tegra_xusb *tegra)
+
+ static int tegra_xusb_probe(struct platform_device *pdev)
+ {
++	struct of_phandle_args args;
+ 	struct tegra_xusb *tegra;
+ 	struct device_node *np;
+ 	struct resource *regs;
+@@ -1454,10 +1455,17 @@ static int tegra_xusb_probe(struct platform_device *pdev)
+ 		goto put_padctl;
+ 	}
+
+-	tegra->padctl_irq = of_irq_get(np, 0);
+-	if (tegra->padctl_irq <= 0) {
+-		err = (tegra->padctl_irq == 0) ? -ENODEV : tegra->padctl_irq;
+-		goto put_padctl;
++	/* Older device-trees don't have padctrl interrupt */
++	err = of_irq_parse_one(np, 0, &args);
++	if (!err) {
++		tegra->padctl_irq = of_irq_get(np, 0);
++		if (tegra->padctl_irq <= 0) {
++			err = (tegra->padctl_irq == 0) ? -ENODEV : tegra->padctl_irq;
++			goto put_padctl;
++		}
++	} else {
++		dev_dbg(&pdev->dev,
++			"%pOF is missing an interrupt, disabling PM support\n", np);
+ 	}
+
+ 	tegra->host_clk = devm_clk_get(&pdev->dev, "xusb_host");
+@@ -1696,11 +1704,15 @@ static int tegra_xusb_probe(struct platform_device *pdev)
+ 		goto remove_usb3;
+ 	}
+
+-	err = devm_request_threaded_irq(&pdev->dev, tegra->padctl_irq, NULL, tegra_xusb_padctl_irq,
+-					IRQF_ONESHOT, dev_name(&pdev->dev), tegra);
+-	if (err < 0) {
+-		dev_err(&pdev->dev, "failed to request padctl IRQ: %d\n", err);
+-		goto remove_usb3;
++	if (tegra->padctl_irq) {
++		err = devm_request_threaded_irq(&pdev->dev, tegra->padctl_irq,
++						NULL, tegra_xusb_padctl_irq,
++						IRQF_ONESHOT, dev_name(&pdev->dev),
++						tegra);
++		if (err < 0) {
++			dev_err(&pdev->dev, "failed to request padctl IRQ: %d\n", err);
++			goto remove_usb3;
++		}
+ 	}
+
+ 	err = tegra_xusb_enable_firmware_messages(tegra);
+@@ -1718,13 +1730,16 @@ static int tegra_xusb_probe(struct platform_device *pdev)
+ 	/* Enable wake for both USB 2.0 and USB 3.0 roothubs */
+ 	device_init_wakeup(&tegra->hcd->self.root_hub->dev, true);
+ 	device_init_wakeup(&xhci->shared_hcd->self.root_hub->dev, true);
+-	device_init_wakeup(tegra->dev, true);
+
+ 	pm_runtime_use_autosuspend(tegra->dev);
+ 	pm_runtime_set_autosuspend_delay(tegra->dev, 2000);
+ 	pm_runtime_mark_last_busy(tegra->dev);
+ 	pm_runtime_set_active(tegra->dev);
+-	pm_runtime_enable(tegra->dev);
++
++	if (tegra->padctl_irq) {
++		device_init_wakeup(tegra->dev, true);
++		pm_runtime_enable(tegra->dev);
++	}
+
+ 	return 0;
+
+@@ -1772,7 +1787,9 @@ static int tegra_xusb_remove(struct platform_device *pdev)
+ 	dma_free_coherent(&pdev->dev, tegra->fw.size, tegra->fw.virt,
+ 			  tegra->fw.phys);
+
+-	pm_runtime_disable(&pdev->dev);
++	if (tegra->padctl_irq)
++		pm_runtime_disable(&pdev->dev);
++
+ 	pm_runtime_put(&pdev->dev);
+
+ 	tegra_xusb_powergate_partitions(tegra);
+diff --git a/fs/btrfs/async-thread.c b/fs/btrfs/async-thread.c
+index 309516e6a968..d39af03b456c 100644
+--- a/fs/btrfs/async-thread.c
++++ b/fs/btrfs/async-thread.c
+@@ -234,6 +234,13 @@ static void run_ordered_work(struct __btrfs_workqueue *wq,
+ 				  ordered_list);
+ 		if (!test_bit(WORK_DONE_BIT, &work->flags))
+ 			break;
++		/*
++		 * Orders all subsequent loads after reading WORK_DONE_BIT,
++		 * paired with the smp_mb__before_atomic in btrfs_work_helper
++		 * this guarantees that the ordered function will see all
++		 * updates from ordinary work function.
++		 */
++		smp_rmb();
+
+ 		/*
+ 		 * we are going to call the ordered done function, but
+@@ -317,6 +324,13 @@ static void btrfs_work_helper(struct work_struct *normal_work)
+ 	thresh_exec_hook(wq);
+ 	work->func(work);
+ 	if (need_order) {
++		/*
++		 * Ensures all memory accesses done in the work function are
++		 * ordered before setting the WORK_DONE_BIT.Ensuring the thread
++		 * which is going to executed the ordered work sees them.
++		 * Pairs with the smp_rmb in run_ordered_work.
++		 */
++		smp_mb__before_atomic();
+ 		set_bit(WORK_DONE_BIT, &work->flags);
+ 		run_ordered_work(wq, work);
+ 	} else {
+diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
+index 5a1f142bdb48..dde341a6388a 100644
+--- a/fs/fuse/dev.c
++++ b/fs/fuse/dev.c
+@@ -847,12 +847,6 @@ static int fuse_try_move_page(struct fuse_copy_state *cs, struct page **pagep)
+
+ 	replace_page_cache_page(oldpage, newpage);
+
+-	/*
+-	 * Release while we have extra ref on stolen page.  Otherwise
+-	 * anon_pipe_buf_release() might think the page can be reused.
+-	 */
+-	pipe_buf_release(cs->pipe, buf);
+-
+ 	get_page(newpage);
+
+ 	if (!(buf->flags & PIPE_BUF_FLAG_LRU))
+@@ -2037,12 +2031,8 @@ static ssize_t fuse_dev_splice_write(struct pipe_inode_info *pipe,
+
+ 	pipe_lock(pipe);
+ out_free:
+-	for (idx = 0; idx < nbuf; idx++) {
+-		struct pipe_buffer *buf = &bufs[idx];
+-
+-		if (buf->ops)
+-			pipe_buf_release(pipe, buf);
+-	}
++	for (idx = 0; idx < nbuf; idx++)
++		pipe_buf_release(pipe, &bufs[idx]);
+ 	pipe_unlock(pipe);
+
+ 	kvfree(bufs);
+diff --git a/include/linux/efi.h b/include/linux/efi.h
+index 6b5d36babfcc..fd4a5d66a9d0 100644
+--- a/include/linux/efi.h
++++ b/include/linux/efi.h
+@@ -43,6 +43,8 @@
+ #define EFI_ABORTED		(21 | (1UL << (BITS_PER_LONG-1)))
+ #define EFI_SECURITY_VIOLATION	(26 | (1UL << (BITS_PER_LONG-1)))
+
++#define EFI_IS_ERROR(x)		((x) & (1UL << (BITS_PER_LONG-1)))
++
+ typedef unsigned long efi_status_t;
+ typedef u8 efi_bool_t;
+ typedef u16 efi_char16_t;		/* UNICODE character */
+@@ -782,6 +784,14 @@ extern int __init efi_setup_pcdp_console(char *);
+ #define EFI_MEM_ATTR		10	/* Did firmware publish an EFI_MEMORY_ATTRIBUTES table? */
+ #define EFI_MEM_NO_SOFT_RESERVE	11	/* Is the kernel configured to ignore soft reservations? */
+ #define EFI_PRESERVE_BS_REGIONS	12	/* Are EFI boot-services memory segments available? */
++#define EFI_SECURE_BOOT		13	/* Are we in Secure Boot mode? */
++
++enum efi_secureboot_mode {
++	efi_secureboot_mode_unset,
++	efi_secureboot_mode_unknown,
++	efi_secureboot_mode_disabled,
++	efi_secureboot_mode_enabled,
++};
+
+ #ifdef CONFIG_EFI
+ /*
+@@ -793,6 +803,8 @@ static inline bool efi_enabled(int feature)
+ }
+ extern void efi_reboot(enum reboot_mode reboot_mode, const char *__unused);
+
++extern void __init efi_set_secure_boot(enum efi_secureboot_mode mode);
++
+ bool __pure __efi_soft_reserve_enabled(void);
+
+ static inline bool __pure efi_soft_reserve_enabled(void)
+@@ -813,6 +825,8 @@ static inline bool efi_enabled(int feature)
+ static inline void
+ efi_reboot(enum reboot_mode reboot_mode, const char *__unused) {}
+
++static inline void efi_set_secure_boot(enum efi_secureboot_mode mode) {}
++
+ static inline bool efi_soft_reserve_enabled(void)
+ {
+ 	return false;
+@@ -825,6 +839,7 @@ static inline bool efi_rt_services_supported(unsigned int mask)
+ #endif
+
+ extern int efi_status_to_err(efi_status_t status);
++extern const char *efi_status_to_str(efi_status_t status);
+
+ /*
+  * Variable Attributes
+@@ -1077,13 +1092,6 @@ static inline bool efi_runtime_disabled(void) { return true; }
+ extern void efi_call_virt_check_flags(unsigned long flags, const char *call);
+ extern unsigned long efi_call_virt_save_flags(void);
+
+-enum efi_secureboot_mode {
+-	efi_secureboot_mode_unset,
+-	efi_secureboot_mode_unknown,
+-	efi_secureboot_mode_disabled,
+-	efi_secureboot_mode_enabled,
+-};
+-
+ static inline
+ enum efi_secureboot_mode efi_get_secureboot_mode(efi_get_variable_t *get_var)
+ {
+diff --git a/include/linux/lsm_hook_defs.h b/include/linux/lsm_hook_defs.h
+index 61590c1f2d33..4c10750865c2 100644
+--- a/include/linux/lsm_hook_defs.h
++++ b/include/linux/lsm_hook_defs.h
+@@ -394,6 +394,8 @@ LSM_HOOK(void, LSM_RET_VOID, bpf_prog_free_security, struct bpf_prog_aux *aux)
+ #endif /* CONFIG_BPF_SYSCALL */
+
+ LSM_HOOK(int, 0, locked_down, enum lockdown_reason what)
++LSM_HOOK(int, 0, lock_kernel_down, const char *where, enum lockdown_reason level)
++
+
+ #ifdef CONFIG_PERF_EVENTS
+ LSM_HOOK(int, 0, perf_event_open, struct perf_event_attr *attr, int type)
+diff --git a/include/linux/lsm_hooks.h b/include/linux/lsm_hooks.h
+index 59024618554e..ab9ca4d393da 100644
+--- a/include/linux/lsm_hooks.h
++++ b/include/linux/lsm_hooks.h
+@@ -1545,6 +1545,12 @@
+  *
+  *     @what: kernel feature being accessed
+  *
++ * @lock_kernel_down
++ * 	Put the kernel into lock-down mode.
++ *
++ * 	@where: Where the lock-down is originating from (e.g. command line option)
++ * 	@level: The lock-down level (can only increase)
++ *
+  * Security hooks for perf events
+  *
+  * @perf_event_open:
+diff --git a/include/linux/random.h b/include/linux/random.h
+index f45b8be3e3c4..7ccdec68b789 100644
+--- a/include/linux/random.h
++++ b/include/linux/random.h
+@@ -14,6 +14,11 @@
+
+ #include <uapi/linux/random.h>
+
++struct random_extrng {
++	ssize_t (*extrng_read)(void __user *buf, size_t buflen);
++	struct module *owner;
++};
++
+ struct random_ready_callback {
+ 	struct list_head list;
+ 	void (*func)(struct random_ready_callback *rdy);
+@@ -44,6 +49,8 @@ extern bool rng_is_initialized(void);
+ extern int add_random_ready_callback(struct random_ready_callback *rdy);
+ extern void del_random_ready_callback(struct random_ready_callback *rdy);
+ extern int __must_check get_random_bytes_arch(void *buf, int nbytes);
++void random_register_extrng(const struct random_extrng *rng);
++void random_unregister_extrng(void);
+
+ #ifndef MODULE
+ extern const struct file_operations random_fops, urandom_fops;
+diff --git a/include/linux/rmi.h b/include/linux/rmi.h
+index ab7eea01ab42..fff7c5f737fc 100644
+--- a/include/linux/rmi.h
++++ b/include/linux/rmi.h
+@@ -364,6 +364,7 @@ struct rmi_driver_data {
+
+ 	struct rmi4_attn_data attn_data;
+ 	DECLARE_KFIFO(attn_fifo, struct rmi4_attn_data, 16);
++	struct work_struct attn_work;
+ };
+
+ int rmi_register_transport_device(struct rmi_transport_dev *xport);
+diff --git a/include/linux/security.h b/include/linux/security.h
+index 46a02ce34d00..37e991a10d70 100644
+--- a/include/linux/security.h
++++ b/include/linux/security.h
+@@ -472,6 +472,7 @@ int security_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen);
+ int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen);
+ int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen);
+ int security_locked_down(enum lockdown_reason what);
++int security_lock_kernel_down(const char *where, enum lockdown_reason level);
+ #else /* CONFIG_SECURITY */
+
+ static inline int call_blocking_lsm_notifier(enum lsm_event event, void *data)
+@@ -1353,6 +1354,10 @@ static inline int security_locked_down(enum lockdown_reason what)
+ {
+ 	return 0;
+ }
++static inline int security_lock_kernel_down(const char *where, enum lockdown_reason level)
++{
++	return 0;
++}
+ #endif	/* CONFIG_SECURITY */
+
+ #if defined(CONFIG_SECURITY) && defined(CONFIG_WATCH_QUEUE)
+diff --git a/init/Kconfig b/init/Kconfig
+index 11f8a845f259..9b94cc1b5546 100644
+--- a/init/Kconfig
++++ b/init/Kconfig
+@@ -1648,7 +1648,7 @@ config AIO
+ 	  this option saves about 7k.
+
+ config IO_URING
+-	bool "Enable IO uring support" if EXPERT
++	bool "Enable IO uring support"
+ 	select IO_WQ
+ 	default y
+ 	help
+diff --git a/kernel/module_signing.c b/kernel/module_signing.c
+index 8723ae70ea1f..fb2d773498c2 100644
+--- a/kernel/module_signing.c
++++ b/kernel/module_signing.c
+@@ -38,8 +38,15 @@ int mod_verify_sig(const void *mod, struct load_info *info)
+ 	modlen -= sig_len + sizeof(ms);
+ 	info->len = modlen;
+
+-	return verify_pkcs7_signature(mod, modlen, mod + modlen, sig_len,
++	ret = verify_pkcs7_signature(mod, modlen, mod + modlen, sig_len,
+ 				      VERIFY_USE_SECONDARY_KEYRING,
+ 				      VERIFYING_MODULE_SIGNATURE,
+ 				      NULL, NULL);
++	if (ret == -ENOKEY && IS_ENABLED(CONFIG_INTEGRITY_PLATFORM_KEYRING)) {
++		ret = verify_pkcs7_signature(mod, modlen, mod + modlen, sig_len,
++				VERIFY_USE_PLATFORM_KEYRING,
++				VERIFYING_MODULE_SIGNATURE,
++				NULL, NULL);
++	}
++	return ret;
+ }
+diff --git a/scripts/tags.sh b/scripts/tags.sh
+index db8ba411860a..2294fb0f17a9 100755
+--- a/scripts/tags.sh
++++ b/scripts/tags.sh
+@@ -16,6 +16,8 @@ fi
+ ignore="$(echo "$RCS_FIND_IGNORE" | sed 's|\\||g' )"
+ # tags and cscope files should also ignore MODVERSION *.mod.c files
+ ignore="$ignore ( -name *.mod.c ) -prune -o"
++# RHEL tags and cscope should also ignore redhat/rpm
++ignore="$ignore ( -path redhat/rpm ) -prune -o"
+
+ # Use make KBUILD_ABS_SRCTREE=1 {tags|cscope}
+ # to force full paths for a non-O= build
+diff --git a/security/integrity/platform_certs/load_uefi.c b/security/integrity/platform_certs/load_uefi.c
+index f290f78c3f30..d3e7ae04f5be 100644
+--- a/security/integrity/platform_certs/load_uefi.c
++++ b/security/integrity/platform_certs/load_uefi.c
+@@ -46,7 +46,8 @@ static __init void *get_cert_list(efi_char16_t *name, efi_guid_t *guid,
+ 		return NULL;
+
+ 	if (*status != EFI_BUFFER_TOO_SMALL) {
+-		pr_err("Couldn't get size: 0x%lx\n", *status);
++		pr_err("Couldn't get size: %s (0x%lx)\n",
++		       efi_status_to_str(*status), *status);
+ 		return NULL;
+ 	}
+
+@@ -57,7 +58,8 @@ static __init void *get_cert_list(efi_char16_t *name, efi_guid_t *guid,
+ 	*status = efi.get_variable(name, guid, NULL, &lsize, db);
+ 	if (*status != EFI_SUCCESS) {
+ 		kfree(db);
+-		pr_err("Error reading db var: 0x%lx\n", *status);
++		pr_err("Error reading db var: %s (0x%lx)\n",
++		       efi_status_to_str(*status), *status);
+ 		return NULL;
+ 	}
+
+diff --git a/security/lockdown/Kconfig b/security/lockdown/Kconfig
+index e84ddf484010..d0501353a4b9 100644
+--- a/security/lockdown/Kconfig
++++ b/security/lockdown/Kconfig
+@@ -16,6 +16,19 @@ config SECURITY_LOCKDOWN_LSM_EARLY
+ 	  subsystem is fully initialised. If enabled, lockdown will
+ 	  unconditionally be called before any other LSMs.
+
++config LOCK_DOWN_IN_EFI_SECURE_BOOT
++	bool "Lock down the kernel in EFI Secure Boot mode"
++	default n
++	depends on EFI && SECURITY_LOCKDOWN_LSM_EARLY
++	help
++	  UEFI Secure Boot provides a mechanism for ensuring that the firmware
++	  will only load signed bootloaders and kernels.  Secure boot mode may
++	  be determined from EFI variables provided by the system firmware if
++	  not indicated by the boot parameters.
++
++	  Enabling this option results in kernel lockdown being triggered if
++	  EFI Secure Boot is set.
++
+ choice
+ 	prompt "Kernel default lockdown mode"
+ 	default LOCK_DOWN_KERNEL_FORCE_NONE
+diff --git a/security/lockdown/lockdown.c b/security/lockdown/lockdown.c
+index 87cbdc64d272..18555cf18da7 100644
+--- a/security/lockdown/lockdown.c
++++ b/security/lockdown/lockdown.c
+@@ -73,6 +73,7 @@ static int lockdown_is_locked_down(enum lockdown_reason what)
+
+ static struct security_hook_list lockdown_hooks[] __lsm_ro_after_init = {
+ 	LSM_HOOK_INIT(locked_down, lockdown_is_locked_down),
++	LSM_HOOK_INIT(lock_kernel_down, lock_kernel_down),
+ };
+
+ static int __init lockdown_lsm_init(void)
+diff --git a/security/security.c b/security/security.c
+index 67264cb08fb3..85a0227bfac1 100644
+--- a/security/security.c
++++ b/security/security.c
+@@ -2599,6 +2599,12 @@ int security_locked_down(enum lockdown_reason what)
+ }
+ EXPORT_SYMBOL(security_locked_down);
+
++int security_lock_kernel_down(const char *where, enum lockdown_reason level)
++{
++	return call_int_hook(lock_kernel_down, 0, where, level);
++}
++EXPORT_SYMBOL(security_lock_kernel_down);
++
+ #ifdef CONFIG_PERF_EVENTS
+ int security_perf_event_open(struct perf_event_attr *attr, int type)
+ {