modules/linux: add 6.1 with patches

Author: daringer

modules/linux

@@ -31,6 +31,9 @@ linux_hash := a6fbd4ee903c128367892c2393ee0d9657b6ed3ea90016d4dc6f1f6da20b2330
 else ifeq "$(CONFIG_LINUX_VERSION)" "5.10.5"
 linux_version := 5.10.5
 linux_hash := 3991a9e16a187d78d5f414d89236ae5d7f404a69e60c4c42a9d262ee19612ef4
+else ifeq "$(CONFIG_LINUX_VERSION)" "6.1"
+linux_version := 6.1
+linux_hash := 2ca1f17051a430f6fed1196e4952717507171acfd97d96577212502703b25deb
 else
 $(error "$(BOARD): does not specify linux kernel version under CONFIG_LINUX_VERSION")
 endif 

patches/linux-6.1/0001-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-6.1/0002-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-6.1/0003-fake-trampoline.patch

@@ -0,0 +1,33 @@
+--- ./clean/linux-6.1/arch/x86/realmode/init.c	2023-04-25 18:02:54.932346344 +0200
++++ linux-6.1/arch/x86/realmode/init.c	2023-04-25 18:06:48.384048760 +0200
+@@ -55,10 +55,12 @@
+ 
+ 	/* Has to be under 1M so we can execute real-mode AP code. */
+ 	mem = memblock_phys_alloc_range(size, PAGE_SIZE, 0, 1<<20);
+-	if (!mem)
+-		pr_info("No sub-1M memory is available for the trampoline\n");
+-	else
+-		set_real_mode_mem(mem);
++	if (!mem) {
++		mem = 0x4000;
++		pr_info("No sub-1M memory is available for the trampoline, guessing %p\n", mem);
++	}
++
++	set_real_mode_mem(mem);
+ 
+ 	/*
+ 	 * Unconditionally reserve the entire fisrt 1M, see comment in
+@@ -202,8 +204,11 @@
+ 
+ static int __init init_real_mode(void)
+ {
+-	if (!real_mode_header)
+-		panic("Real mode trampoline was not allocated");
++	if (!real_mode_header) {
++		// ignore for now
++		pr_warn("Real mode trampoline was not allocated");
++		return 0;
++	}
+ 
+ 	setup_real_mode();
+ 	set_real_mode_permissions();