disable pwm7

hc

2024-05-10 23fa18eaa71266feff7ba8d83022d9e1cc83c65a

 kernel/arch/arm64/kernel/acpi.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  *  ARM64 Specific Low-Level ACPI Boot Support
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  *
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@@ -7,30 +8,28 @@
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  *	Author: Hanjun Guo <hanjun.guo@linaro.org>
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  *	Author: Tomasz Nowicki <tomasz.nowicki@linaro.org>
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  *	Author: Naresh Bhat <naresh.bhat@linaro.org>
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- *
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- *  This program is free software; you can redistribute it and/or modify
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- *  it under the terms of the GNU General Public License version 2 as
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- *  published by the Free Software Foundation.
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  */
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 #define pr_fmt(fmt) "ACPI: " fmt
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14
 
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 #include <linux/acpi.h>
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-#include <linux/bootmem.h>
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 #include <linux/cpumask.h>
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 #include <linux/efi.h>
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 #include <linux/efi-bgrt.h>
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 #include <linux/init.h>
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 #include <linux/irq.h>
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 #include <linux/irqdomain.h>
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+#include <linux/irq_work.h>
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 #include <linux/memblock.h>
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 #include <linux/of_fdt.h>
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 #include <linux/smp.h>
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 #include <linux/serial_core.h>
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+#include <linux/pgtable.h>
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+#include <acpi/ghes.h>
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 #include <asm/cputype.h>
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 #include <asm/cpu_ops.h>
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-#include <asm/pgtable.h>
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+#include <asm/daifflags.h>
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 #include <asm/smp_plat.h>
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 int acpi_noirq = 1;		/* skip ACPI IRQ initialization */
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@@ -261,3 +260,149 @@
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 		return __pgprot(PROT_NORMAL_NC);
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 	return __pgprot(PROT_DEVICE_nGnRnE);
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 }
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+
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+void __iomem *acpi_os_ioremap(acpi_physical_address phys, acpi_size size)
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+{
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+	efi_memory_desc_t *md, *region = NULL;
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+	pgprot_t prot;
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+
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+	if (WARN_ON_ONCE(!efi_enabled(EFI_MEMMAP)))
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+		return NULL;
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+
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+	for_each_efi_memory_desc(md) {
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+		u64 end = md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT);
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+
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+		if (phys < md->phys_addr || phys >= end)
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+			continue;
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+
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+		if (phys + size > end) {
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+			pr_warn(FW_BUG "requested region covers multiple EFI memory regions\n");
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+			return NULL;
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+		}
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+		region = md;
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+		break;
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+	}
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+
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+	/*
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+	 * It is fine for AML to remap regions that are not represented in the
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+	 * EFI memory map at all, as it only describes normal memory, and MMIO
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+	 * regions that require a virtual mapping to make them accessible to
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+	 * the EFI runtime services.
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+	 */
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+	prot = __pgprot(PROT_DEVICE_nGnRnE);
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+	if (region) {
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+		switch (region->type) {
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+		case EFI_LOADER_CODE:
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+		case EFI_LOADER_DATA:
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+		case EFI_BOOT_SERVICES_CODE:
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+		case EFI_BOOT_SERVICES_DATA:
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+		case EFI_CONVENTIONAL_MEMORY:
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+		case EFI_PERSISTENT_MEMORY:
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+			if (memblock_is_map_memory(phys) ||
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+			    !memblock_is_region_memory(phys, size)) {
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+				pr_warn(FW_BUG "requested region covers kernel memory @ %pa\n", &phys);
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+				return NULL;
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+			}
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+			/*
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+			 * Mapping kernel memory is permitted if the region in
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+			 * question is covered by a single memblock with the
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+			 * NOMAP attribute set: this enables the use of ACPI
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+			 * table overrides passed via initramfs, which are
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+			 * reserved in memory using arch_reserve_mem_area()
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+			 * below. As this particular use case only requires
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+			 * read access, fall through to the R/O mapping case.
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+			 */
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+			fallthrough;
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+
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+		case EFI_RUNTIME_SERVICES_CODE:
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+			/*
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+			 * This would be unusual, but not problematic per se,
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+			 * as long as we take care not to create a writable
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+			 * mapping for executable code.
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+			 */
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+			prot = PAGE_KERNEL_RO;
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+			break;
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+
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+		case EFI_ACPI_RECLAIM_MEMORY:
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+			/*
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+			 * ACPI reclaim memory is used to pass firmware tables
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+			 * and other data that is intended for consumption by
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+			 * the OS only, which may decide it wants to reclaim
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+			 * that memory and use it for something else. We never
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+			 * do that, but we usually add it to the linear map
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+			 * anyway, in which case we should use the existing
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+			 * mapping.
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+			 */
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+			if (memblock_is_map_memory(phys))
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+				return (void __iomem *)__phys_to_virt(phys);
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+			fallthrough;
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+
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+		default:
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+			if (region->attribute & EFI_MEMORY_WB)
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+				prot = PAGE_KERNEL;
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+			else if (region->attribute & EFI_MEMORY_WT)
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+				prot = __pgprot(PROT_NORMAL_WT);
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+			else if (region->attribute & EFI_MEMORY_WC)
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+				prot = __pgprot(PROT_NORMAL_NC);
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+		}
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+	}
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+	return __ioremap(phys, size, prot);
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+}
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+
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+/*
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+ * Claim Synchronous External Aborts as a firmware first notification.
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+ *
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+ * Used by KVM and the arch do_sea handler.
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+ * @regs may be NULL when called from process context.
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+ */
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+int apei_claim_sea(struct pt_regs *regs)
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+{
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+	int err = -ENOENT;
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+	bool return_to_irqs_enabled;
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+	unsigned long current_flags;
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+
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+	if (!IS_ENABLED(CONFIG_ACPI_APEI_GHES))
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+		return err;
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+
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+	current_flags = local_daif_save_flags();
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+
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+	/* current_flags isn't useful here as daif doesn't tell us about pNMI */
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+	return_to_irqs_enabled = !irqs_disabled_flags(arch_local_save_flags());
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+
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+	if (regs)
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+		return_to_irqs_enabled = interrupts_enabled(regs);
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+
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+	/*
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+	 * SEA can interrupt SError, mask it and describe this as an NMI so
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+	 * that APEI defers the handling.
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+	 */
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+	local_daif_restore(DAIF_ERRCTX);
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+	nmi_enter();
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+	err = ghes_notify_sea();
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+	nmi_exit();
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+
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+	/*
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+	 * APEI NMI-like notifications are deferred to irq_work. Unless
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+	 * we interrupted irqs-masked code, we can do that now.
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+	 */
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+	if (!err) {
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+		if (return_to_irqs_enabled) {
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+			local_daif_restore(DAIF_PROCCTX_NOIRQ);
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+			__irq_enter();
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+			irq_work_run();
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+			__irq_exit();
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+		} else {
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+			pr_warn_ratelimited("APEI work queued but not completed");
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+			err = -EINPROGRESS;
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+		}
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+	}
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+
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+	local_daif_restore(current_flags);
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+
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+	return err;
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+}
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+
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+void arch_reserve_mem_area(acpi_physical_address addr, size_t size)
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+{
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+	memblock_mark_nomap(addr, size);
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+}