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modules/linux: Support building with Linux 6.1.8.

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This is particularly beneficial for servers with Aspeed BMC video,
because it introduces framebuffer console acceleration.  The
framebuffer console is much more responsive.

Patches were ported from 5.10.5:

0001-fake-acpi.patch: This may not be needed any more, but it applies
cleanly and I don't think it would harm anything.

0002-nmi-squelch.patch: The comment mentions qemu but I see this
message on physical machines occasionally, so I think this is needed.

0003-fake-trampoline.patch: This patch does not apply cleanly.  It
could be ported, but I don't think it's needed, I dropped it.  Dates
back to a very old commit where Linux was being embedded into a vendor
UEFI firmware: a4d7654b1e.

0010-winterfell-ahci.patch: Minor change of %x to %lx in context.

Signed-off-by: Jonathon Hall <jonathon.hall@puri.sm>
This commit is contained in:
Jonathon Hall 2023-04-07 16:22:22 -04:00
parent e9a5b27e6c
commit 12c7dfdadc
No known key found for this signature in database
GPG Key ID: 1E9C3CA91AE25114
4 changed files with 73 additions and 0 deletions
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3
modules/linux
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@ -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)" "6.1.8"
linux_version := 6.1.8
linux_hash := b60bb53ab8ba370a270454b11e93d41af29126fc72bd6ede517673e2e57b816d
else
$(error "$(BOARD): does not specify linux kernel version under CONFIG_LINUX_VERSION")
endif

32
patches/linux-6.1.8/0001-fake-acpi.patch Normal file
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@ -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);
}
}

20
patches/linux-6.1.8/0002-nmi-squelch.patch Normal file
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@ -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);

18
patches/linux-6.1.8/0010-winterfell-ahci.patch Normal file
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@ -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%lx\n", port_map);
/* write the fixed up value to the PI register */