modules/linux: Add option to use 4.19 LTS kernel

Add option to use kernel 4.19.139 (current LTS version).
Duplicate existing patches from 4.14.62 as they all apply cleanly.

Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>

modules/linux

@@ -3,6 +3,9 @@ modules-y += linux
 ifeq "$(CONFIG_LINUX_VERSION)" "4.14.62"
 linux_version := 4.14.62
 linux_hash := 51ca4d7e8ee156dc0f19bc7768915cfae41dbb0b4f251e4fa8b178c5674c22ab
+else ifeq "$(CONFIG_LINUX_VERSION)" "4.19.139"
+linux_version := 4.19.139
+linux_hash := 9c4ebf21fe949f80fbcfbbd6e7fe181040d325e89475e230ab53ef01f9d55605
 else
 $(error "$(BOARD): does not specify linux kernel version under CONFIG_LINUX_VERSION")
 endif 

patches/linux-4.19.139/0000-efi_bds.patch

@@ -0,0 +1,54 @@
+diff -u --recursive ../../clean/linux-4.14.62/arch/x86/boot/compressed/eboot.c linux-4.14.62/arch/x86/boot/compressed/eboot.c
+--- ../../clean/linux-4.14.62/arch/x86/boot/compressed/eboot.c	2018-08-09 06:16:40.000000000 -0400
++++ linux-4.14.62/arch/x86/boot/compressed/eboot.c	2018-08-09 10:13:11.801000000 -0400
+@@ -630,8 +630,8 @@
+ 	u16 *s2;
+ 	u8 *s1;
+ 	int i;
+-	unsigned long ramdisk_addr;
+-	unsigned long ramdisk_size;
++	unsigned long ramdisk_addr = 0;
++	unsigned long ramdisk_size = 0;
+
+ 	efi_early = c;
+ 	sys_table = (efi_system_table_t *)(unsigned long)efi_early->table;
+@@ -686,9 +686,6 @@
+ 	/* Fill in upper bits of command line address, NOP on 32 bit  */
+ 	boot_params->ext_cmd_line_ptr = (u64)(unsigned long)cmdline_ptr >> 32;
+
+-	hdr->ramdisk_image = 0;
+-	hdr->ramdisk_size = 0;
+-
+ 	/* Clear APM BIOS info */
+ 	memset(bi, 0, sizeof(*bi));
+
+@@ -712,10 +709,16 @@
+
+ 	if (status != EFI_SUCCESS)
+ 		goto fail2;
+-	hdr->ramdisk_image = ramdisk_addr & 0xffffffff;
+-	hdr->ramdisk_size  = ramdisk_size & 0xffffffff;
+-	boot_params->ext_ramdisk_image = (u64)ramdisk_addr >> 32;
+-	boot_params->ext_ramdisk_size  = (u64)ramdisk_size >> 32;
++
++	// don't overwrite the bzImage or loader provided ramdisk pointer
++	// unless the kernel command line specified a different one.
++	if (ramdisk_addr != 0)
++	{
++		hdr->ramdisk_image = ramdisk_addr & 0xffffffff;
++		hdr->ramdisk_size  = ramdisk_size & 0xffffffff;
++		boot_params->ext_ramdisk_image = (u64)ramdisk_addr >> 32;
++		boot_params->ext_ramdisk_size  = (u64)ramdisk_size >> 32;
++	}
+
+ 	return boot_params;
+ fail2:
+--- clean/linux-4.14.62/arch/x86/boot/compressed/early_serial_console.c	2018-08-09 12:16:40.000000000 +0200
++++ linux-4.14.62/arch/x86/boot/compressed/early_serial_console.c	2018-09-28 11:59:36.824015244 +0200
+@@ -1,5 +1,5 @@
+ #include "misc.h"
+
+-int early_serial_base;
++int early_serial_base = 0x3f8;
+
+ #include "../early_serial_console.c"

patches/linux-4.19.139/0001-fake-acpi.patch

@@ -0,0 +1,32 @@
+diff --recursive -u ./clean/linux-4.9.80/drivers/acpi/acpica/evxfevnt.c linux-4.9.80/drivers/acpi/acpica/evxfevnt.c
+--- ./clean/linux-4.9.80/drivers/acpi/acpica/evxfevnt.c	2018-02-03 11:05:43.000000000 -0500
++++ linux-4.9.80/drivers/acpi/acpica/evxfevnt.c	2018-02-07 15:51:28.786502597 -0500
+@@ -111,6 +111,8 @@
+ 	}
+
+ 	ACPI_ERROR((AE_INFO, "Hardware did not enter ACPI mode"));
++printk("%s:%d faking ACPI mode\n", __func__, __LINE__);
++	return_ACPI_STATUS(AE_OK);
+ 	return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE);
+ }
+
+diff --recursive -u ./clean/linux-4.9.80/drivers/acpi/acpica/hwacpi.c linux-4.9.80/drivers/acpi/acpica/hwacpi.c
+--- ./clean/linux-4.9.80/drivers/acpi/acpica/hwacpi.c	2018-02-03 11:05:43.000000000 -0500
++++ linux-4.9.80/drivers/acpi/acpica/hwacpi.c	2018-02-07 15:51:35.126557868 -0500
+@@ -168,12 +168,16 @@
+
+ 	status = acpi_read_bit_register(ACPI_BITREG_SCI_ENABLE, &value);
+ 	if (ACPI_FAILURE(status)) {
++printk("%s:%d faking ACPI mode\n", __func__, __LINE__);
++		return_UINT32(ACPI_SYS_MODE_ACPI);
+ 		return_UINT32(ACPI_SYS_MODE_LEGACY);
+ 	}
+
+ 	if (value) {
+ 		return_UINT32(ACPI_SYS_MODE_ACPI);
+ 	} else {
++//printk("%s:%d faking ACPI mode\n", __func__, __LINE__);
++//		return_UINT32(ACPI_SYS_MODE_ACPI);
+ 		return_UINT32(ACPI_SYS_MODE_LEGACY);
+ 	}
+ }

patches/linux-4.19.139/0002-nmi-squelch.patch

@@ -0,0 +1,20 @@
+diff --recursive -u ./clean/linux-4.9.80/arch/x86/kernel/nmi.c linux-4.9.80/arch/x86/kernel/nmi.c
+--- ./clean/linux-4.9.80/arch/x86/kernel/nmi.c	2018-02-03 11:05:43.000000000 -0500
++++ linux-4.9.80/arch/x86/kernel/nmi.c	2018-02-07 18:56:10.475613884 -0500
+@@ -303,6 +303,8 @@
+
+ 	__this_cpu_add(nmi_stats.unknown, 1);
+
++#if 0
++// qemu generates these for some reason
+ 	pr_emerg("Uhhuh. NMI received for unknown reason %02x on CPU %d.\n",
+ 		 reason, smp_processor_id());
+
+@@ -311,6 +313,7 @@
+ 		nmi_panic(regs, "NMI: Not continuing");
+
+ 	pr_emerg("Dazed and confused, but trying to continue\n");
++#endif
+ }
+ NOKPROBE_SYMBOL(unknown_nmi_error);
+

patches/linux-4.19.139/0003-fake-trampoline.patch

@@ -0,0 +1,28 @@
+diff --recursive -u ./clean/linux-4.9.80/arch/x86/realmode/init.c linux-4.9.80/arch/x86/realmode/init.c
+--- ./clean/linux-4.9.80/arch/x86/realmode/init.c	2018-02-03 11:05:43.000000000 -0500
++++ linux-4.9.80/arch/x86/realmode/init.c	2018-02-07 15:51:28.538500435 -0500
+@@ -35,8 +35,8 @@
+ 	/* Has to be under 1M so we can execute real-mode AP code. */
+ 	mem = memblock_find_in_range(0, 1<<20, size, PAGE_SIZE);
+ 	if (!mem) {
+-		pr_info("No sub-1M memory is available for the trampoline\n");
+-		return;
++		mem = 0x4000;
++		pr_info("No sub-1M memory is available for the trampoline, guessing %p\n", mem);
+ 	}
+
+ 	memblock_reserve(mem, size);
+@@ -138,7 +138,12 @@
+ static int __init init_real_mode(void)
+ {
+ 	if (!real_mode_header)
+-		panic("Real mode trampoline was not allocated");
++	{
++		// ignore for now
++		//panic("Real mode trampoline was not allocated");
++		pr_warn("Real mode trampoline was not allocated");
++		return 0;
++	}
+
+ 	setup_real_mode();
+ 	set_real_mode_permissions();

patches/linux-4.19.139/0010-winterfell-ahci.patch

@@ -0,0 +1,18 @@
+diff --recursive -u ./clean/linux-4.9.80/drivers/ata/libahci.c linux-4.9.80/drivers/ata/libahci.c
+--- ./clean/linux-4.9.80/drivers/ata/libahci.c	2018-02-03 11:05:43.000000000 -0500
++++ linux-4.9.80/drivers/ata/libahci.c	2018-02-07 18:02:32.526535910 -0500
+@@ -537,8 +537,12 @@
+ 	}
+
+ 	/* fabricate port_map from cap.nr_ports for < AHCI 1.3 */
+-	if (!port_map && vers < 0x10300) {
+-		port_map = (1 << ahci_nr_ports(cap)) - 1;
++	if (!port_map) { //  && vers < 0x10300) {
++		printk("%s: saved_port=%02x\n", __func__, hpriv->saved_port_map);
++		writel(0x1, mmio + HOST_PORTS_IMPL);
++		port_map = readl(mmio + HOST_PORTS_IMPL);
++
++		//port_map = (1 << ahci_nr_ports(cap)) - 1;
+ 		dev_warn(dev, "forcing PORTS_IMPL to 0x%x\n", port_map);
+
+ 		/* write the fixed up value to the PI register */