[gentoo-commits] proj/linux-patches:5.5 commit in: /

[Mike Pagano]

commit:     2eb05a67750fe9fc4c720fc5176aa4177c2f4db3
Author:     Mike Pagano <mpagano <AT> gentoo <DOT> org>
AuthorDate: Mon Dec 30 23:47:43 2019 +0000
Commit:     Mike Pagano <mpagano <AT> gentoo <DOT> org>
CommitDate: Mon Dec 30 23:47:43 2019 +0000
URL:        https://gitweb.gentoo.org/proj/linux-patches.git/commit/?id=2eb05a67

Add patchesi for the 5.5 branch. Details below.

Support for namespace user.pax.* on tmpfs.
Enable link security restrictions by default.
Bluetooth: Check key sizes only when Secure Simple Pairing is
enabled. See bug #686758.This hid-apple patch enables swapping
of the FN and left Control keys and some additional on some
apple keyboards. See bug #622902.Add Gentoo Linux support
config settings and defaults.  Kernel patch for >= gccv8 enables
kernel >= v4.13 optimizations for additional CPUs.
Kernel patch enables gcc >= v9.1 optimizations for additional CPUs.

Signed-off-by: Mike Pagano <mpagano <AT> gentoo.org>

 0000_README                                        |  24 +
 1500_XATTR_USER_PREFIX.patch                       |  69 +++
 ...ble-link-security-restrictions-by-default.patch |  20 +
 ...zes-only-if-Secure-Simple-Pairing-enabled.patch |  37 ++
 2600_enable-key-swapping-for-apple-mac.patch       | 114 ++++
 5011_enable-cpu-optimizations-for-gcc8.patch       | 569 +++++++++++++++++++
 5012_enable-cpu-optimizations-for-gcc91.patch      | 632 +++++++++++++++++++++
 7 files changed, 1465 insertions(+)

diff --git a/0000_README b/0000_README
index 9018993..2f0a93e 100644
--- a/0000_README
+++ b/0000_README
@@ -43,6 +43,30 @@ EXPERIMENTAL
 Individual Patch Descriptions:
 --------------------------------------------------------------------------
 
+Patch:  1500_XATTR_USER_PREFIX.patch
+From:   https://bugs.gentoo.org/show_bug.cgi?id=470644
+Desc:   Support for namespace user.pax.* on tmpfs.
+
+Patch:  1510_fs-enable-link-security-restrictions-by-default.patch
+From:   http://sources.debian.net/src/linux/3.16.7-ckt4-3/debian/patches/debian/fs-enable-link-security-restrictions-by-default.patch/
+Desc:   Enable link security restrictions by default.
+
+Patch:  2000_BT-Check-key-sizes-only-if-Secure-Simple-Pairing-enabled.patch
+From:   https://lore.kernel.org/linux-bluetooth/20190522070540.48895-1-marcel@××××××××.org/raw
+Desc:   Bluetooth: Check key sizes only when Secure Simple Pairing is enabled. See bug #686758
+
+Patch:  2600_enable-key-swapping-for-apple-mac.patch
+From:   https://github.com/free5lot/hid-apple-patched
+Desc:   This hid-apple patch enables swapping of the FN and left Control keys and some additional on some apple keyboards. See bug #622902
+
 Patch:  4567_distro-Gentoo-Kconfig.patch
 From:   Tom Wijsman <TomWij@g.o>
 Desc:   Add Gentoo Linux support config settings and defaults.
+
+Patch:  5011_enable-cpu-optimizations-for-gcc8.patch
+From:   https://github.com/graysky2/kernel_gcc_patch/
+Desc:   Kernel patch for >= gccv8 enables kernel >= v4.13 optimizations for additional CPUs.
+
+Patch:  5012_enable-cpu-optimizations-for-gcc91.patch
+From:   https://github.com/graysky2/kernel_gcc_patch/
+Desc:   Kernel patch enables gcc >= v9.1 optimizations for additional CPUs.

diff --git a/1500_XATTR_USER_PREFIX.patch b/1500_XATTR_USER_PREFIX.patch
new file mode 100644
index 0000000..bacd032
--- /dev/null
+++ b/1500_XATTR_USER_PREFIX.patch
@@ -0,0 +1,69 @@
+From: Anthony G. Basile <blueness@g.o>
+
+This patch adds support for a restricted user-controlled namespace on
+tmpfs filesystem used to house PaX flags.  The namespace must be of the
+form user.pax.* and its value cannot exceed a size of 8 bytes.
+
+This is needed even on all Gentoo systems so that XATTR_PAX flags
+are preserved for users who might build packages using portage on
+a tmpfs system with a non-hardened kernel and then switch to a
+hardened kernel with XATTR_PAX enabled.
+
+The namespace is added to any user with Extended Attribute support
+enabled for tmpfs.  Users who do not enable xattrs will not have
+the XATTR_PAX flags preserved.
+
+diff --git a/include/uapi/linux/xattr.h b/include/uapi/linux/xattr.h
+index 1590c49..5eab462 100644
+--- a/include/uapi/linux/xattr.h
++++ b/include/uapi/linux/xattr.h
+@@ -73,5 +73,9 @@
+ #define XATTR_POSIX_ACL_DEFAULT  "posix_acl_default"
+ #define XATTR_NAME_POSIX_ACL_DEFAULT XATTR_SYSTEM_PREFIX XATTR_POSIX_ACL_DEFAULT
+ 
++/* User namespace */
++#define XATTR_PAX_PREFIX XATTR_USER_PREFIX "pax."
++#define XATTR_PAX_FLAGS_SUFFIX "flags"
++#define XATTR_NAME_PAX_FLAGS XATTR_PAX_PREFIX XATTR_PAX_FLAGS_SUFFIX
+ 
+ #endif /* _UAPI_LINUX_XATTR_H */
+diff --git a/mm/shmem.c b/mm/shmem.c
+index 440e2a7..c377172 100644
+--- a/mm/shmem.c
++++ b/mm/shmem.c
+@@ -2667,6 +2667,14 @@ static int shmem_xattr_handler_set(const struct xattr_handler *handler,
+ 	struct shmem_inode_info *info = SHMEM_I(d_inode(dentry));
+ 
+ 	name = xattr_full_name(handler, name);
++
++	if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) {
++		if (strcmp(name, XATTR_NAME_PAX_FLAGS))
++			return -EOPNOTSUPP;
++		if (size > 8)
++			return -EINVAL;
++	}
++
+ 	return simple_xattr_set(&info->xattrs, name, value, size, flags);
+ }
+ 
+@@ -2682,6 +2690,12 @@ static const struct xattr_handler shmem_trusted_xattr_handler = {
+ 	.set = shmem_xattr_handler_set,
+ };
+ 
++static const struct xattr_handler shmem_user_xattr_handler = {
++	.prefix = XATTR_USER_PREFIX,
++	.get = shmem_xattr_handler_get,
++	.set = shmem_xattr_handler_set,
++};
++
+ static const struct xattr_handler *shmem_xattr_handlers[] = {
+ #ifdef CONFIG_TMPFS_POSIX_ACL
+ 	&posix_acl_access_xattr_handler,
+@@ -2689,6 +2703,7 @@ static const struct xattr_handler *shmem_xattr_handlers[] = {
+ #endif
+ 	&shmem_security_xattr_handler,
+ 	&shmem_trusted_xattr_handler,
++	&shmem_user_xattr_handler,
+ 	NULL
+ };
+ 

diff --git a/1510_fs-enable-link-security-restrictions-by-default.patch b/1510_fs-enable-link-security-restrictions-by-default.patch
new file mode 100644
index 0000000..f0ed144
--- /dev/null
+++ b/1510_fs-enable-link-security-restrictions-by-default.patch
@@ -0,0 +1,20 @@
+From: Ben Hutchings <ben@××××××××××××.uk>
+Subject: fs: Enable link security restrictions by default
+Date: Fri, 02 Nov 2012 05:32:06 +0000
+Bug-Debian: https://bugs.debian.org/609455
+Forwarded: not-needed
+This reverts commit 561ec64ae67ef25cac8d72bb9c4bfc955edfd415
+('VFS: don't do protected {sym,hard}links by default').
+--- a/fs/namei.c	2018-09-28 07:56:07.770005006 -0400
++++ b/fs/namei.c	2018-09-28 07:56:43.370349204 -0400
+@@ -885,8 +885,8 @@ static inline void put_link(struct namei
+ 		path_put(&last->link);
+ }
+ 
+-int sysctl_protected_symlinks __read_mostly = 0;
+-int sysctl_protected_hardlinks __read_mostly = 0;
++int sysctl_protected_symlinks __read_mostly = 1;
++int sysctl_protected_hardlinks __read_mostly = 1;
+ int sysctl_protected_fifos __read_mostly;
+ int sysctl_protected_regular __read_mostly;
+ 

diff --git a/2000_BT-Check-key-sizes-only-if-Secure-Simple-Pairing-enabled.patch b/2000_BT-Check-key-sizes-only-if-Secure-Simple-Pairing-enabled.patch
new file mode 100644
index 0000000..394ad48
--- /dev/null
+++ b/2000_BT-Check-key-sizes-only-if-Secure-Simple-Pairing-enabled.patch
@@ -0,0 +1,37 @@
+The encryption is only mandatory to be enforced when both sides are using
+Secure Simple Pairing and this means the key size check makes only sense
+in that case.
+
+On legacy Bluetooth 2.0 and earlier devices like mice the encryption was
+optional and thus causing an issue if the key size check is not bound to
+using Secure Simple Pairing.
+
+Fixes: d5bb334a8e17 ("Bluetooth: Align minimum encryption key size for LE and BR/EDR connections")
+Signed-off-by: Marcel Holtmann <marcel@××××××××.org>
+Cc: stable@×××××××××××.org
+---
+ net/bluetooth/hci_conn.c | 9 +++++++--
+ 1 file changed, 7 insertions(+), 2 deletions(-)
+
+diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
+index 3cf0764d5793..7516cdde3373 100644
+--- a/net/bluetooth/hci_conn.c
++++ b/net/bluetooth/hci_conn.c
+@@ -1272,8 +1272,13 @@ int hci_conn_check_link_mode(struct hci_conn *conn)
+ 			return 0;
+ 	}
+ 
+-	if (hci_conn_ssp_enabled(conn) &&
+-	    !test_bit(HCI_CONN_ENCRYPT, &conn->flags))
++	/* If Secure Simple Pairing is not enabled, then legacy connection
++	 * setup is used and no encryption or key sizes can be enforced.
++	 */
++	if (!hci_conn_ssp_enabled(conn))
++		return 1;
++
++	if (!test_bit(HCI_CONN_ENCRYPT, &conn->flags))
+ 		return 0;
+ 
+ 	/* The minimum encryption key size needs to be enforced by the
+-- 
+2.20.1

diff --git a/2600_enable-key-swapping-for-apple-mac.patch b/2600_enable-key-swapping-for-apple-mac.patch
new file mode 100644
index 0000000..ab228d3
--- /dev/null
+++ b/2600_enable-key-swapping-for-apple-mac.patch
@@ -0,0 +1,114 @@
+--- a/drivers/hid/hid-apple.c
++++ b/drivers/hid/hid-apple.c
+@@ -52,6 +52,22 @@
+ 		"(For people who want to keep Windows PC keyboard muscle memory. "
+ 		"[0] = as-is, Mac layout. 1 = swapped, Windows layout.)");
+ 
++static unsigned int swap_fn_leftctrl;
++module_param(swap_fn_leftctrl, uint, 0644);
++MODULE_PARM_DESC(swap_fn_leftctrl, "Swap the Fn and left Control keys. "
++		"(For people who want to keep PC keyboard muscle memory. "
++		"[0] = as-is, Mac layout, 1 = swapped, PC layout)");
++
++static unsigned int rightalt_as_rightctrl;
++module_param(rightalt_as_rightctrl, uint, 0644);
++MODULE_PARM_DESC(rightalt_as_rightctrl, "Use the right Alt key as a right Ctrl key. "
++		"[0] = as-is, Mac layout. 1 = Right Alt is right Ctrl");
++
++static unsigned int ejectcd_as_delete;
++module_param(ejectcd_as_delete, uint, 0644);
++MODULE_PARM_DESC(ejectcd_as_delete, "Use Eject-CD key as Delete key. "
++		"([0] = disabled, 1 = enabled)");
++
+ struct apple_sc {
+ 	unsigned long quirks;
+ 	unsigned int fn_on;
+@@ -164,6 +180,21 @@
+ 	{ }
+ };
+ 
++static const struct apple_key_translation swapped_fn_leftctrl_keys[] = {
++	{ KEY_FN, KEY_LEFTCTRL },
++	{ }
++};
++
++static const struct apple_key_translation rightalt_as_rightctrl_keys[] = {
++	{ KEY_RIGHTALT, KEY_RIGHTCTRL },
++	{ }
++};
++
++static const struct apple_key_translation ejectcd_as_delete_keys[] = {
++	{ KEY_EJECTCD,	KEY_DELETE },
++	{ }
++};
++
+ static const struct apple_key_translation *apple_find_translation(
+ 		const struct apple_key_translation *table, u16 from)
+ {
+@@ -183,9 +214,11 @@
+ 	struct apple_sc *asc = hid_get_drvdata(hid);
+ 	const struct apple_key_translation *trans, *table;
+ 
+-	if (usage->code == KEY_FN) {
++	u16 fn_keycode = (swap_fn_leftctrl) ? (KEY_LEFTCTRL) : (KEY_FN);
++
++	if (usage->code == fn_keycode) {
+ 		asc->fn_on = !!value;
+-		input_event(input, usage->type, usage->code, value);
++		input_event(input, usage->type, KEY_FN, value);
+ 		return 1;
+ 	}
+ 
+@@ -264,6 +297,30 @@
+ 		}
+ 	}
+ 
++	if (swap_fn_leftctrl) {
++		trans = apple_find_translation(swapped_fn_leftctrl_keys, usage->code);
++		if (trans) {
++			input_event(input, usage->type, trans->to, value);
++			return 1;
++		}
++	}
++
++	if (ejectcd_as_delete) {
++		trans = apple_find_translation(ejectcd_as_delete_keys, usage->code);
++		if (trans) {
++			input_event(input, usage->type, trans->to, value);
++			return 1;
++		}
++	}
++
++	if (rightalt_as_rightctrl) {
++		trans = apple_find_translation(rightalt_as_rightctrl_keys, usage->code);
++		if (trans) {
++			input_event(input, usage->type, trans->to, value);
++			return 1;
++		}
++	}
++
+ 	return 0;
+ }
+ 
+@@ -327,6 +384,21 @@
+ 
+ 	for (trans = apple_iso_keyboard; trans->from; trans++)
+ 		set_bit(trans->to, input->keybit);
++
++	if (swap_fn_leftctrl) {
++		for (trans = swapped_fn_leftctrl_keys; trans->from; trans++)
++			set_bit(trans->to, input->keybit);
++	}
++
++	if (ejectcd_as_delete) {
++		for (trans = ejectcd_as_delete_keys; trans->from; trans++)
++			set_bit(trans->to, input->keybit);
++	}
++
++        if (rightalt_as_rightctrl) {
++		for (trans = rightalt_as_rightctrl_keys; trans->from; trans++)
++			set_bit(trans->to, input->keybit);
++	}
+ }
+ 
+ static int apple_input_mapping(struct hid_device *hdev, struct hid_input *hi,

diff --git a/5011_enable-cpu-optimizations-for-gcc8.patch b/5011_enable-cpu-optimizations-for-gcc8.patch
new file mode 100644
index 0000000..bfd2065
--- /dev/null
+++ b/5011_enable-cpu-optimizations-for-gcc8.patch
@@ -0,0 +1,569 @@
+WARNING
+This patch works with gcc versions 8.1+ and with kernel version 4.13+ and should
+NOT be applied when compiling on older versions of gcc due to key name changes
+of the march flags introduced with the version 4.9 release of gcc.[1]
+
+Use the older version of this patch hosted on the same github for older
+versions of gcc.
+
+FEATURES
+This patch adds additional CPU options to the Linux kernel accessible under:
+ Processor type and features  --->
+  Processor family --->
+
+The expanded microarchitectures include:
+* AMD Improved K8-family
+* AMD K10-family
+* AMD Family 10h (Barcelona)
+* AMD Family 14h (Bobcat)
+* AMD Family 16h (Jaguar)
+* AMD Family 15h (Bulldozer)
+* AMD Family 15h (Piledriver)
+* AMD Family 15h (Steamroller)
+* AMD Family 15h (Excavator)
+* AMD Family 17h (Zen)
+* Intel Silvermont low-power processors
+* Intel 1st Gen Core i3/i5/i7 (Nehalem)
+* Intel 1.5 Gen Core i3/i5/i7 (Westmere)
+* Intel 2nd Gen Core i3/i5/i7 (Sandybridge)
+* Intel 3rd Gen Core i3/i5/i7 (Ivybridge)
+* Intel 4th Gen Core i3/i5/i7 (Haswell)
+* Intel 5th Gen Core i3/i5/i7 (Broadwell)
+* Intel 6th Gen Core i3/i5/i7 (Skylake)
+* Intel 6th Gen Core i7/i9 (Skylake X)
+* Intel 8th Gen Core i3/i5/i7 (Cannon Lake)
+* Intel 8th Gen Core i7/i9 (Ice Lake)
+
+It also offers to compile passing the 'native' option which, "selects the CPU
+to generate code for at compilation time by determining the processor type of
+the compiling machine. Using -march=native enables all instruction subsets
+supported by the local machine and will produce code optimized for the local
+machine under the constraints of the selected instruction set."[3]
+
+MINOR NOTES
+This patch also changes 'atom' to 'bonnell' in accordance with the gcc v4.9
+changes. Note that upstream is using the deprecated 'match=atom' flags when I
+believe it should use the newer 'march=bonnell' flag for atom processors.[2]
+
+It is not recommended to compile on Atom-CPUs with the 'native' option.[4] The
+recommendation is to use the 'atom' option instead.
+
+BENEFITS
+Small but real speed increases are measurable using a make endpoint comparing
+a generic kernel to one built with one of the respective microarchs.
+
+See the following experimental evidence supporting this statement:
+https://github.com/graysky2/kernel_gcc_patch
+
+REQUIREMENTS
+linux version >=4.20
+gcc version >=8.1
+
+ACKNOWLEDGMENTS
+This patch builds on the seminal work by Jeroen.[5]
+
+REFERENCES
+1. https://gcc.gnu.org/gcc-4.9/changes.html
+2. https://bugzilla.kernel.org/show_bug.cgi?id=77461
+3. https://gcc.gnu.org/onlinedocs/gcc/x86-Options.html
+4. https://github.com/graysky2/kernel_gcc_patch/issues/15
+5. http://www.linuxforge.net/docs/linux/linux-gcc.php
+
+--- a/arch/x86/Makefile_32.cpu	2019-02-22 09:22:03.426937735 -0500
++++ b/arch/x86/Makefile_32.cpu	2019-02-22 09:37:58.680968580 -0500
+@@ -23,7 +23,18 @@ cflags-$(CONFIG_MK6)		+= -march=k6
+ # Please note, that patches that add -march=athlon-xp and friends are pointless.
+ # They make zero difference whatsosever to performance at this time.
+ cflags-$(CONFIG_MK7)		+= -march=athlon
++cflags-$(CONFIG_MNATIVE) += $(call cc-option,-march=native)
+ cflags-$(CONFIG_MK8)		+= $(call cc-option,-march=k8,-march=athlon)
++cflags-$(CONFIG_MK8SSE3)		+= $(call cc-option,-march=k8-sse3,-march=athlon)
++cflags-$(CONFIG_MK10)	+= $(call cc-option,-march=amdfam10,-march=athlon)
++cflags-$(CONFIG_MBARCELONA)	+= $(call cc-option,-march=barcelona,-march=athlon)
++cflags-$(CONFIG_MBOBCAT)	+= $(call cc-option,-march=btver1,-march=athlon)
++cflags-$(CONFIG_MJAGUAR)	+= $(call cc-option,-march=btver2,-march=athlon)
++cflags-$(CONFIG_MBULLDOZER)	+= $(call cc-option,-march=bdver1,-march=athlon)
++cflags-$(CONFIG_MPILEDRIVER)	+= $(call cc-option,-march=bdver2,-march=athlon)
++cflags-$(CONFIG_MSTEAMROLLER)	+= $(call cc-option,-march=bdver3,-march=athlon)
++cflags-$(CONFIG_MEXCAVATOR)	+= $(call cc-option,-march=bdver4,-march=athlon)
++cflags-$(CONFIG_MZEN)	+= $(call cc-option,-march=znver1,-march=athlon)
+ cflags-$(CONFIG_MCRUSOE)	+= -march=i686 -falign-functions=0 -falign-jumps=0 -falign-loops=0
+ cflags-$(CONFIG_MEFFICEON)	+= -march=i686 $(call tune,pentium3) -falign-functions=0 -falign-jumps=0 -falign-loops=0
+ cflags-$(CONFIG_MWINCHIPC6)	+= $(call cc-option,-march=winchip-c6,-march=i586)
+@@ -32,9 +43,20 @@ cflags-$(CONFIG_MCYRIXIII)	+= $(call cc-
+ cflags-$(CONFIG_MVIAC3_2)	+= $(call cc-option,-march=c3-2,-march=i686)
+ cflags-$(CONFIG_MVIAC7)		+= -march=i686
+ cflags-$(CONFIG_MCORE2)		+= -march=i686 $(call tune,core2)
+-cflags-$(CONFIG_MATOM)		+= $(call cc-option,-march=atom,$(call cc-option,-march=core2,-march=i686)) \
+-	$(call cc-option,-mtune=atom,$(call cc-option,-mtune=generic))
+-
++cflags-$(CONFIG_MNEHALEM)	+= -march=i686 $(call tune,nehalem)
++cflags-$(CONFIG_MWESTMERE)	+= -march=i686 $(call tune,westmere)
++cflags-$(CONFIG_MSILVERMONT)	+= -march=i686 $(call tune,silvermont)
++cflags-$(CONFIG_MSANDYBRIDGE)	+= -march=i686 $(call tune,sandybridge)
++cflags-$(CONFIG_MIVYBRIDGE)	+= -march=i686 $(call tune,ivybridge)
++cflags-$(CONFIG_MHASWELL)	+= -march=i686 $(call tune,haswell)
++cflags-$(CONFIG_MBROADWELL)	+= -march=i686 $(call tune,broadwell)
++cflags-$(CONFIG_MSKYLAKE)	+= -march=i686 $(call tune,skylake)
++cflags-$(CONFIG_MSKYLAKEX)	+= -march=i686 $(call tune,skylake-avx512)
++cflags-$(CONFIG_MCANNONLAKE)	+= -march=i686 $(call tune,cannonlake)
++cflags-$(CONFIG_MICELAKE)	+= -march=i686 $(call tune,icelake)
++cflags-$(CONFIG_MATOM)		+= $(call cc-option,-march=bonnell,$(call cc-option,-march=core2,-march=i686)) \
++	$(call cc-option,-mtune=bonnell,$(call cc-option,-mtune=generic))
++ 
+ # AMD Elan support
+ cflags-$(CONFIG_MELAN)		+= -march=i486
+ 
+--- a/arch/x86/Kconfig.cpu	2019-02-22 09:22:11.576958595 -0500
++++ b/arch/x86/Kconfig.cpu	2019-02-22 09:34:16.490003911 -0500
+@@ -116,6 +116,7 @@ config MPENTIUMM
+ config MPENTIUM4
+ 	bool "Pentium-4/Celeron(P4-based)/Pentium-4 M/older Xeon"
+ 	depends on X86_32
++	select X86_P6_NOP
+ 	---help---
+ 	  Select this for Intel Pentium 4 chips.  This includes the
+ 	  Pentium 4, Pentium D, P4-based Celeron and Xeon, and
+@@ -150,7 +151,7 @@ config MPENTIUM4
+ 
+ 
+ config MK6
+-	bool "K6/K6-II/K6-III"
++	bool "AMD K6/K6-II/K6-III"
+ 	depends on X86_32
+ 	---help---
+ 	  Select this for an AMD K6-family processor.  Enables use of
+@@ -158,7 +159,7 @@ config MK6
+ 	  flags to GCC.
+ 
+ config MK7
+-	bool "Athlon/Duron/K7"
++	bool "AMD Athlon/Duron/K7"
+ 	depends on X86_32
+ 	---help---
+ 	  Select this for an AMD Athlon K7-family processor.  Enables use of
+@@ -166,11 +167,81 @@ config MK7
+ 	  flags to GCC.
+ 
+ config MK8
+-	bool "Opteron/Athlon64/Hammer/K8"
++	bool "AMD Opteron/Athlon64/Hammer/K8"
+ 	---help---
+ 	  Select this for an AMD Opteron or Athlon64 Hammer-family processor.
+ 	  Enables use of some extended instructions, and passes appropriate
+ 	  optimization flags to GCC.
++config MK8SSE3
++	bool "AMD Opteron/Athlon64/Hammer/K8 with SSE3"
++	---help---
++	  Select this for improved AMD Opteron or Athlon64 Hammer-family processors.
++	  Enables use of some extended instructions, and passes appropriate
++	  optimization flags to GCC.
++
++config MK10
++	bool "AMD 61xx/7x50/PhenomX3/X4/II/K10"
++	---help---
++	  Select this for an AMD 61xx Eight-Core Magny-Cours, Athlon X2 7x50,
++		Phenom X3/X4/II, Athlon II X2/X3/X4, or Turion II-family processor.
++	  Enables use of some extended instructions, and passes appropriate
++	  optimization flags to GCC.
++
++config MBARCELONA
++	bool "AMD Barcelona"
++	---help---
++	  Select this for AMD Family 10h Barcelona processors.
++
++	  Enables -march=barcelona
++
++config MBOBCAT
++	bool "AMD Bobcat"
++	---help---
++	  Select this for AMD Family 14h Bobcat processors.
++
++	  Enables -march=btver1
++
++config MJAGUAR
++	bool "AMD Jaguar"
++	---help---
++	  Select this for AMD Family 16h Jaguar processors.
++
++	  Enables -march=btver2
++
++config MBULLDOZER
++	bool "AMD Bulldozer"
++	---help---
++	  Select this for AMD Family 15h Bulldozer processors.
++
++	  Enables -march=bdver1
++
++config MPILEDRIVER
++	bool "AMD Piledriver"
++	---help---
++	  Select this for AMD Family 15h Piledriver processors.
++
++	  Enables -march=bdver2
++
++config MSTEAMROLLER
++	bool "AMD Steamroller"
++	---help---
++	  Select this for AMD Family 15h Steamroller processors.
++
++	  Enables -march=bdver3
++
++config MEXCAVATOR
++	bool "AMD Excavator"
++	---help---
++	  Select this for AMD Family 15h Excavator processors.
++
++	  Enables -march=bdver4
++
++config MZEN
++	bool "AMD Zen"
++	---help---
++	  Select this for AMD Family 17h Zen processors.
++
++	  Enables -march=znver1
+ 
+ config MCRUSOE
+ 	bool "Crusoe"
+@@ -253,6 +324,7 @@ config MVIAC7
+ 
+ config MPSC
+ 	bool "Intel P4 / older Netburst based Xeon"
++	select X86_P6_NOP
+ 	depends on X86_64
+ 	---help---
+ 	  Optimize for Intel Pentium 4, Pentium D and older Nocona/Dempsey
+@@ -262,23 +334,126 @@ config MPSC
+ 	  using the cpu family field
+ 	  in /proc/cpuinfo. Family 15 is an older Xeon, Family 6 a newer one.
+ 
++config MATOM
++	bool "Intel Atom"
++	select X86_P6_NOP
++	---help---
++
++	  Select this for the Intel Atom platform. Intel Atom CPUs have an
++	  in-order pipelining architecture and thus can benefit from
++	  accordingly optimized code. Use a recent GCC with specific Atom
++	  support in order to fully benefit from selecting this option.
++
+ config MCORE2
+-	bool "Core 2/newer Xeon"
++	bool "Intel Core 2"
++	select X86_P6_NOP
++
+ 	---help---
+ 
+ 	  Select this for Intel Core 2 and newer Core 2 Xeons (Xeon 51xx and
+ 	  53xx) CPUs. You can distinguish newer from older Xeons by the CPU
+ 	  family in /proc/cpuinfo. Newer ones have 6 and older ones 15
+ 	  (not a typo)
++	  Enables -march=core2
+ 
+-config MATOM
+-	bool "Intel Atom"
++config MNEHALEM
++	bool "Intel Nehalem"
++	select X86_P6_NOP
+ 	---help---
+ 
+-	  Select this for the Intel Atom platform. Intel Atom CPUs have an
+-	  in-order pipelining architecture and thus can benefit from
+-	  accordingly optimized code. Use a recent GCC with specific Atom
+-	  support in order to fully benefit from selecting this option.
++	  Select this for 1st Gen Core processors in the Nehalem family.
++
++	  Enables -march=nehalem
++
++config MWESTMERE
++	bool "Intel Westmere"
++	select X86_P6_NOP
++	---help---
++
++	  Select this for the Intel Westmere formerly Nehalem-C family.
++
++	  Enables -march=westmere
++
++config MSILVERMONT
++	bool "Intel Silvermont"
++	select X86_P6_NOP
++	---help---
++
++	  Select this for the Intel Silvermont platform.
++
++	  Enables -march=silvermont
++
++config MSANDYBRIDGE
++	bool "Intel Sandy Bridge"
++	select X86_P6_NOP
++	---help---
++
++	  Select this for 2nd Gen Core processors in the Sandy Bridge family.
++
++	  Enables -march=sandybridge
++
++config MIVYBRIDGE
++	bool "Intel Ivy Bridge"
++	select X86_P6_NOP
++	---help---
++
++	  Select this for 3rd Gen Core processors in the Ivy Bridge family.
++
++	  Enables -march=ivybridge
++
++config MHASWELL
++	bool "Intel Haswell"
++	select X86_P6_NOP
++	---help---
++
++	  Select this for 4th Gen Core processors in the Haswell family.
++
++	  Enables -march=haswell
++
++config MBROADWELL
++	bool "Intel Broadwell"
++	select X86_P6_NOP
++	---help---
++
++	  Select this for 5th Gen Core processors in the Broadwell family.
++
++	  Enables -march=broadwell
++
++config MSKYLAKE
++	bool "Intel Skylake"
++	select X86_P6_NOP
++	---help---
++
++	  Select this for 6th Gen Core processors in the Skylake family.
++
++	  Enables -march=skylake
++
++config MSKYLAKEX
++	bool "Intel Skylake X"
++	select X86_P6_NOP
++	---help---
++
++	  Select this for 6th Gen Core processors in the Skylake X family.
++
++	  Enables -march=skylake-avx512
++
++config MCANNONLAKE
++	bool "Intel Cannon Lake"
++	select X86_P6_NOP
++	---help---
++
++	  Select this for 8th Gen Core processors
++
++	  Enables -march=cannonlake
++
++config MICELAKE
++	bool "Intel Ice Lake"
++	select X86_P6_NOP
++	---help---
++
++	  Select this for 8th Gen Core processors in the Ice Lake family.
++
++	  Enables -march=icelake
+ 
+ config GENERIC_CPU
+ 	bool "Generic-x86-64"
+@@ -287,6 +462,19 @@ config GENERIC_CPU
+ 	  Generic x86-64 CPU.
+ 	  Run equally well on all x86-64 CPUs.
+ 
++config MNATIVE
++ bool "Native optimizations autodetected by GCC"
++ ---help---
++
++   GCC 4.2 and above support -march=native, which automatically detects
++   the optimum settings to use based on your processor. -march=native
++   also detects and applies additional settings beyond -march specific
++   to your CPU, (eg. -msse4). Unless you have a specific reason not to
++   (e.g. distcc cross-compiling), you should probably be using
++   -march=native rather than anything listed below.
++
++   Enables -march=native
++
+ endchoice
+ 
+ config X86_GENERIC
+@@ -311,7 +499,7 @@ config X86_INTERNODE_CACHE_SHIFT
+ config X86_L1_CACHE_SHIFT
+ 	int
+ 	default "7" if MPENTIUM4 || MPSC
+-	default "6" if MK7 || MK8 || MPENTIUMM || MCORE2 || MATOM || MVIAC7 || X86_GENERIC || GENERIC_CPU
++	default "6" if MK7 || MK8 || MK8SSE3 || MK10 || MBARCELONA || MBOBCAT || MBULLDOZER || MPILEDRIVER || MSTEAMROLLER || MEXCAVATOR || MZEN || MJAGUAR || MPENTIUMM || MCORE2 || MNEHALEM || MWESTMERE || MSILVERMONT || MSANDYBRIDGE || MIVYBRIDGE || MHASWELL || MBROADWELL || MSKYLAKE || MSKYLAKEX || MCANNONLAKE || MICELAKE || MNATIVE || MATOM || MVIAC7 || X86_GENERIC || GENERIC_CPU
+ 	default "4" if MELAN || M486 || MGEODEGX1
+ 	default "5" if MWINCHIP3D || MWINCHIPC6 || MCRUSOE || MEFFICEON || MCYRIXIII || MK6 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || M586 || MVIAC3_2 || MGEODE_LX
+ 
+@@ -329,39 +517,40 @@ config X86_ALIGNMENT_16
+ 
+ config X86_INTEL_USERCOPY
+ 	def_bool y
+-	depends on MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M586MMX || X86_GENERIC || MK8 || MK7 || MEFFICEON || MCORE2
++	depends on MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M586MMX || X86_GENERIC || MK8 || MK8SSE3 || MK7 || MEFFICEON || MCORE2 || MK10 || MBARCELONA || MNEHALEM || MWESTMERE || MSILVERMONT || MSANDYBRIDGE || MIVYBRIDGE || MHASWELL || MBROADWELL || MSKYLAKE || MSKYLAKEX || MCANNONLAKE || MICELAKE || MNATIVE
+ 
+ config X86_USE_PPRO_CHECKSUM
+ 	def_bool y
+-	depends on MWINCHIP3D || MWINCHIPC6 || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MK8 || MVIAC3_2 || MVIAC7 || MEFFICEON || MGEODE_LX || MCORE2 || MATOM
++	depends on MWINCHIP3D || MWINCHIPC6 || MCYRIXIII || MK7 || MK6 || MK10 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MK8 || MK8SSE3 || MVIAC3_2 || MVIAC7 || MEFFICEON || MGEODE_LX || MCORE2 || MNEHALEM || MWESTMERE || MSILVERMONT || MSANDYBRIDGE || MIVYBRIDGE || MHASWELL || MBROADWELL || MSKYLAKE || MSKYLAKEX || MCANNONLAKE || MICELAKE || MATOM || MNATIVE
+ 
+ config X86_USE_3DNOW
+ 	def_bool y
+ 	depends on (MCYRIXIII || MK7 || MGEODE_LX) && !UML
+ 
+-#
+-# P6_NOPs are a relatively minor optimization that require a family >=
+-# 6 processor, except that it is broken on certain VIA chips.
+-# Furthermore, AMD chips prefer a totally different sequence of NOPs
+-# (which work on all CPUs).  In addition, it looks like Virtual PC
+-# does not understand them.
+-#
+-# As a result, disallow these if we're not compiling for X86_64 (these
+-# NOPs do work on all x86-64 capable chips); the list of processors in
+-# the right-hand clause are the cores that benefit from this optimization.
+-#
+ config X86_P6_NOP
+-	def_bool y
+-	depends on X86_64
+-	depends on (MCORE2 || MPENTIUM4 || MPSC)
++	default n
++	bool "Support for P6_NOPs on Intel chips"
++	depends on (MCORE2 || MPENTIUM4 || MPSC || MATOM || MNEHALEM || MWESTMERE || MSILVERMONT  || MSANDYBRIDGE || MIVYBRIDGE || MHASWELL || MBROADWELL || MSKYLAKE || MSKYLAKEX || MCANNONLAKE || MICELAKE || MNATIVE)
++	---help---
++	P6_NOPs are a relatively minor optimization that require a family >=
++	6 processor, except that it is broken on certain VIA chips.
++	Furthermore, AMD chips prefer a totally different sequence of NOPs
++	(which work on all CPUs).  In addition, it looks like Virtual PC
++	does not understand them.
++
++	As a result, disallow these if we're not compiling for X86_64 (these
++	NOPs do work on all x86-64 capable chips); the list of processors in
++	the right-hand clause are the cores that benefit from this optimization.
+ 
++	Say Y if you have Intel CPU newer than Pentium Pro, N otherwise.
++ 
+ config X86_TSC
+ 	def_bool y
+-	depends on (MWINCHIP3D || MCRUSOE || MEFFICEON || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || MK8 || MVIAC3_2 || MVIAC7 || MGEODEGX1 || MGEODE_LX || MCORE2 || MATOM) || X86_64
++	depends on (MWINCHIP3D || MCRUSOE || MEFFICEON || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || MK8 || MK8SSE3 || MVIAC3_2 || MVIAC7 || MGEODEGX1 || MGEODE_LX || MCORE2 || MNEHALEM || MWESTMERE || MSILVERMONT || MSANDYBRIDGE || MIVYBRIDGE || MHASWELL || MBROADWELL || MSKYLAKE || MSKYLAKEX || MCANNONLAKE || MICELAKE || MNATIVE || MATOM) || X86_64
+ 
+ config X86_CMPXCHG64
+ 	def_bool y
+-	depends on X86_PAE || X86_64 || MCORE2 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586TSC || M586MMX || MATOM || MGEODE_LX || MGEODEGX1 || MK6 || MK7 || MK8
++	depends on (MK8 || MK8SSE3 || MK10 || MBARCELONA || MBOBCAT || MBULLDOZER || MPILEDRIVER || MSTEAMROLLER || MEXCAVATOR || MZEN || MJAGUAR || MK7 || MCORE2 || MNEHALEM || MWESTMERE || MSILVERMONT || MSANDYBRIDGE || MIVYBRIDGE || MHASWELL || MBROADWELL || MSKYLAKE || MSKYLAKEX || MCANNONLAKE || MICELAKE || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MVIAC3_2 || MVIAC7 || MCRUSOE || MEFFICEON || X86_64 || MNATIVE || MATOM || MGEODE_LX)
+ 
+ # this should be set for all -march=.. options where the compiler
+ # generates cmov.
+--- a/arch/x86/Makefile	2019-02-22 09:21:58.196924367 -0500
++++ b/arch/x86/Makefile	2019-02-22 09:36:27.310577832 -0500
+@@ -118,13 +118,46 @@ else
+ 	KBUILD_CFLAGS += $(call cc-option,-mskip-rax-setup)
+ 
+         # FIXME - should be integrated in Makefile.cpu (Makefile_32.cpu)
++		cflags-$(CONFIG_MNATIVE) += $(call cc-option,-march=native)
+         cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8)
++        cflags-$(CONFIG_MK8SSE3) += $(call cc-option,-march=k8-sse3,-mtune=k8)
++        cflags-$(CONFIG_MK10) += $(call cc-option,-march=amdfam10)
++        cflags-$(CONFIG_MBARCELONA) += $(call cc-option,-march=barcelona)
++        cflags-$(CONFIG_MBOBCAT) += $(call cc-option,-march=btver1)
++        cflags-$(CONFIG_MJAGUAR) += $(call cc-option,-march=btver2)
++        cflags-$(CONFIG_MBULLDOZER) += $(call cc-option,-march=bdver1)
++        cflags-$(CONFIG_MPILEDRIVER) += $(call cc-option,-march=bdver2)
++        cflags-$(CONFIG_MSTEAMROLLER) += $(call cc-option,-march=bdver3)
++        cflags-$(CONFIG_MEXCAVATOR) += $(call cc-option,-march=bdver4)
++        cflags-$(CONFIG_MZEN) += $(call cc-option,-march=znver1)
+         cflags-$(CONFIG_MPSC) += $(call cc-option,-march=nocona)
+ 
+         cflags-$(CONFIG_MCORE2) += \
+-                $(call cc-option,-march=core2,$(call cc-option,-mtune=generic))
+-	cflags-$(CONFIG_MATOM) += $(call cc-option,-march=atom) \
+-		$(call cc-option,-mtune=atom,$(call cc-option,-mtune=generic))
++                $(call cc-option,-march=core2,$(call cc-option,-mtune=core2))
++        cflags-$(CONFIG_MNEHALEM) += \
++                $(call cc-option,-march=nehalem,$(call cc-option,-mtune=nehalem))
++        cflags-$(CONFIG_MWESTMERE) += \
++                $(call cc-option,-march=westmere,$(call cc-option,-mtune=westmere))
++        cflags-$(CONFIG_MSILVERMONT) += \
++                $(call cc-option,-march=silvermont,$(call cc-option,-mtune=silvermont))
++        cflags-$(CONFIG_MSANDYBRIDGE) += \
++                $(call cc-option,-march=sandybridge,$(call cc-option,-mtune=sandybridge))
++        cflags-$(CONFIG_MIVYBRIDGE) += \
++                $(call cc-option,-march=ivybridge,$(call cc-option,-mtune=ivybridge))
++        cflags-$(CONFIG_MHASWELL) += \
++                $(call cc-option,-march=haswell,$(call cc-option,-mtune=haswell))
++        cflags-$(CONFIG_MBROADWELL) += \
++                $(call cc-option,-march=broadwell,$(call cc-option,-mtune=broadwell))
++        cflags-$(CONFIG_MSKYLAKE) += \
++                $(call cc-option,-march=skylake,$(call cc-option,-mtune=skylake))
++        cflags-$(CONFIG_MSKYLAKEX) += \
++                $(call cc-option,-march=skylake-avx512,$(call cc-option,-mtune=skylake-avx512))
++        cflags-$(CONFIG_MCANNONLAKE) += \
++                $(call cc-option,-march=cannonlake,$(call cc-option,-mtune=cannonlake))
++        cflags-$(CONFIG_MICELAKE) += \
++                $(call cc-option,-march=icelake,$(call cc-option,-mtune=icelake))
++        cflags-$(CONFIG_MATOM) += $(call cc-option,-march=bonnell) \
++                $(call cc-option,-mtune=bonnell,$(call cc-option,-mtune=generic))
+         cflags-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=generic)
+         KBUILD_CFLAGS += $(cflags-y)
+ 
+--- a/arch/x86/include/asm/module.h	2019-02-22 09:22:26.726997480 -0500
++++ b/arch/x86/include/asm/module.h	2019-02-22 09:40:04.231493392 -0500
+@@ -25,6 +25,30 @@ struct mod_arch_specific {
+ #define MODULE_PROC_FAMILY "586MMX "
+ #elif defined CONFIG_MCORE2
+ #define MODULE_PROC_FAMILY "CORE2 "
++#elif defined CONFIG_MNATIVE
++#define MODULE_PROC_FAMILY "NATIVE "
++#elif defined CONFIG_MNEHALEM
++#define MODULE_PROC_FAMILY "NEHALEM "
++#elif defined CONFIG_MWESTMERE
++#define MODULE_PROC_FAMILY "WESTMERE "
++#elif defined CONFIG_MSILVERMONT
++#define MODULE_PROC_FAMILY "SILVERMONT "
++#elif defined CONFIG_MSANDYBRIDGE
++#define MODULE_PROC_FAMILY "SANDYBRIDGE "
++#elif defined CONFIG_MIVYBRIDGE
++#define MODULE_PROC_FAMILY "IVYBRIDGE "
++#elif defined CONFIG_MHASWELL
++#define MODULE_PROC_FAMILY "HASWELL "
++#elif defined CONFIG_MBROADWELL
++#define MODULE_PROC_FAMILY "BROADWELL "
++#elif defined CONFIG_MSKYLAKE
++#define MODULE_PROC_FAMILY "SKYLAKE "
++#elif defined CONFIG_MSKYLAKEX
++#define MODULE_PROC_FAMILY "SKYLAKEX "
++#elif defined CONFIG_MCANNONLAKE
++#define MODULE_PROC_FAMILY "CANNONLAKE "
++#elif defined CONFIG_MICELAKE
++#define MODULE_PROC_FAMILY "ICELAKE "
+ #elif defined CONFIG_MATOM
+ #define MODULE_PROC_FAMILY "ATOM "
+ #elif defined CONFIG_M686
+@@ -43,6 +67,26 @@ struct mod_arch_specific {
+ #define MODULE_PROC_FAMILY "K7 "
+ #elif defined CONFIG_MK8
+ #define MODULE_PROC_FAMILY "K8 "
++#elif defined CONFIG_MK8SSE3
++#define MODULE_PROC_FAMILY "K8SSE3 "
++#elif defined CONFIG_MK10
++#define MODULE_PROC_FAMILY "K10 "
++#elif defined CONFIG_MBARCELONA
++#define MODULE_PROC_FAMILY "BARCELONA "
++#elif defined CONFIG_MBOBCAT
++#define MODULE_PROC_FAMILY "BOBCAT "
++#elif defined CONFIG_MBULLDOZER
++#define MODULE_PROC_FAMILY "BULLDOZER "
++#elif defined CONFIG_MPILEDRIVER
++#define MODULE_PROC_FAMILY "PILEDRIVER "
++#elif defined CONFIG_MSTEAMROLLER
++#define MODULE_PROC_FAMILY "STEAMROLLER "
++#elif defined CONFIG_MJAGUAR
++#define MODULE_PROC_FAMILY "JAGUAR "
++#elif defined CONFIG_MEXCAVATOR
++#define MODULE_PROC_FAMILY "EXCAVATOR "
++#elif defined CONFIG_MZEN
++#define MODULE_PROC_FAMILY "ZEN "
+ #elif defined CONFIG_MELAN
+ #define MODULE_PROC_FAMILY "ELAN "
+ #elif defined CONFIG_MCRUSOE

diff --git a/5012_enable-cpu-optimizations-for-gcc91.patch b/5012_enable-cpu-optimizations-for-gcc91.patch
new file mode 100644
index 0000000..455c8b2
--- /dev/null
+++ b/5012_enable-cpu-optimizations-for-gcc91.patch
@@ -0,0 +1,632 @@
+WARNING
+This patch works with gcc versions 9.1+ and with kernel version 5.5+ and should
+NOT be applied when compiling on older versions of gcc due to key name changes
+of the march flags introduced with the version 4.9 release of gcc.[1]
+
+Use the older version of this patch hosted on the same github for older
+versions of gcc.
+
+FEATURES
+This patch adds additional CPU options to the Linux kernel accessible under:
+ Processor type and features  --->
+  Processor family --->
+
+The expanded microarchitectures include:
+* AMD Improved K8-family
+* AMD K10-family
+* AMD Family 10h (Barcelona)
+* AMD Family 14h (Bobcat)
+* AMD Family 16h (Jaguar)
+* AMD Family 15h (Bulldozer)
+* AMD Family 15h (Piledriver)
+* AMD Family 15h (Steamroller)
+* AMD Family 15h (Excavator)
+* AMD Family 17h (Zen)
+* AMD Family 17h (Zen 2)
+* Intel Silvermont low-power processors
+* Intel Goldmont low-power processors (Apollo Lake and Denverton)
+* Intel Goldmont Plus low-power processors (Gemini Lake)
+* Intel 1st Gen Core i3/i5/i7 (Nehalem)
+* Intel 1.5 Gen Core i3/i5/i7 (Westmere)
+* Intel 2nd Gen Core i3/i5/i7 (Sandybridge)
+* Intel 3rd Gen Core i3/i5/i7 (Ivybridge)
+* Intel 4th Gen Core i3/i5/i7 (Haswell)
+* Intel 5th Gen Core i3/i5/i7 (Broadwell)
+* Intel 6th Gen Core i3/i5/i7 (Skylake)
+* Intel 6th Gen Core i7/i9 (Skylake X)
+* Intel 8th Gen Core i3/i5/i7 (Cannon Lake)
+* Intel 10th Gen Core i7/i9 (Ice Lake)
+* Intel Xeon (Cascade Lake)
+
+It also offers to compile passing the 'native' option which, "selects the CPU
+to generate code for at compilation time by determining the processor type of
+the compiling machine. Using -march=native enables all instruction subsets
+supported by the local machine and will produce code optimized for the local
+machine under the constraints of the selected instruction set."[3]
+
+MINOR NOTES
+This patch also changes 'atom' to 'bonnell' in accordance with the gcc v4.9
+changes. Note that upstream is using the deprecated 'match=atom' flags when I
+believe it should use the newer 'march=bonnell' flag for atom processors.[2]
+
+It is not recommended to compile on Atom-CPUs with the 'native' option.[4] The
+recommendation is to use the 'atom' option instead.
+
+BENEFITS
+Small but real speed increases are measurable using a make endpoint comparing
+a generic kernel to one built with one of the respective microarchs.
+
+See the following experimental evidence supporting this statement:
+https://github.com/graysky2/kernel_gcc_patch
+
+REQUIREMENTS
+linux version >=5.5
+gcc version >=9.1
+
+ACKNOWLEDGMENTS
+This patch builds on the seminal work by Jeroen.[5]
+
+REFERENCES
+1. https://gcc.gnu.org/gcc-4.9/changes.html
+2. https://bugzilla.kernel.org/show_bug.cgi?id=77461
+3. https://gcc.gnu.org/onlinedocs/gcc/x86-Options.html
+4. https://github.com/graysky2/kernel_gcc_patch/issues/15
+5. http://www.linuxforge.net/docs/linux/linux-gcc.php
+
+--- a/arch/x86/include/asm/module.h	2019-12-15 18:16:08.000000000 -0500
++++ b/arch/x86/include/asm/module.h	2019-12-17 14:03:55.968871551 -0500
+@@ -27,6 +27,36 @@ struct mod_arch_specific {
+ #define MODULE_PROC_FAMILY "586MMX "
+ #elif defined CONFIG_MCORE2
+ #define MODULE_PROC_FAMILY "CORE2 "
++#elif defined CONFIG_MNATIVE
++#define MODULE_PROC_FAMILY "NATIVE "
++#elif defined CONFIG_MNEHALEM
++#define MODULE_PROC_FAMILY "NEHALEM "
++#elif defined CONFIG_MWESTMERE
++#define MODULE_PROC_FAMILY "WESTMERE "
++#elif defined CONFIG_MSILVERMONT
++#define MODULE_PROC_FAMILY "SILVERMONT "
++#elif defined CONFIG_MGOLDMONT
++#define MODULE_PROC_FAMILY "GOLDMONT "
++#elif defined CONFIG_MGOLDMONTPLUS
++#define MODULE_PROC_FAMILY "GOLDMONTPLUS "
++#elif defined CONFIG_MSANDYBRIDGE
++#define MODULE_PROC_FAMILY "SANDYBRIDGE "
++#elif defined CONFIG_MIVYBRIDGE
++#define MODULE_PROC_FAMILY "IVYBRIDGE "
++#elif defined CONFIG_MHASWELL
++#define MODULE_PROC_FAMILY "HASWELL "
++#elif defined CONFIG_MBROADWELL
++#define MODULE_PROC_FAMILY "BROADWELL "
++#elif defined CONFIG_MSKYLAKE
++#define MODULE_PROC_FAMILY "SKYLAKE "
++#elif defined CONFIG_MSKYLAKEX
++#define MODULE_PROC_FAMILY "SKYLAKEX "
++#elif defined CONFIG_MCANNONLAKE
++#define MODULE_PROC_FAMILY "CANNONLAKE "
++#elif defined CONFIG_MICELAKE
++#define MODULE_PROC_FAMILY "ICELAKE "
++#elif defined CONFIG_MCASCADELAKE
++#define MODULE_PROC_FAMILY "CASCADELAKE "
+ #elif defined CONFIG_MATOM
+ #define MODULE_PROC_FAMILY "ATOM "
+ #elif defined CONFIG_M686
+@@ -45,6 +75,28 @@ struct mod_arch_specific {
+ #define MODULE_PROC_FAMILY "K7 "
+ #elif defined CONFIG_MK8
+ #define MODULE_PROC_FAMILY "K8 "
++#elif defined CONFIG_MK8SSE3
++#define MODULE_PROC_FAMILY "K8SSE3 "
++#elif defined CONFIG_MK10
++#define MODULE_PROC_FAMILY "K10 "
++#elif defined CONFIG_MBARCELONA
++#define MODULE_PROC_FAMILY "BARCELONA "
++#elif defined CONFIG_MBOBCAT
++#define MODULE_PROC_FAMILY "BOBCAT "
++#elif defined CONFIG_MBULLDOZER
++#define MODULE_PROC_FAMILY "BULLDOZER "
++#elif defined CONFIG_MPILEDRIVER
++#define MODULE_PROC_FAMILY "PILEDRIVER "
++#elif defined CONFIG_MSTEAMROLLER
++#define MODULE_PROC_FAMILY "STEAMROLLER "
++#elif defined CONFIG_MJAGUAR
++#define MODULE_PROC_FAMILY "JAGUAR "
++#elif defined CONFIG_MEXCAVATOR
++#define MODULE_PROC_FAMILY "EXCAVATOR "
++#elif defined CONFIG_MZEN
++#define MODULE_PROC_FAMILY "ZEN "
++#elif defined CONFIG_MZEN2
++#define MODULE_PROC_FAMILY "ZEN2 "
+ #elif defined CONFIG_MELAN
+ #define MODULE_PROC_FAMILY "ELAN "
+ #elif defined CONFIG_MCRUSOE
+--- a/arch/x86/Kconfig.cpu	2019-12-15 18:16:08.000000000 -0500
++++ b/arch/x86/Kconfig.cpu	2019-12-17 14:09:03.805642284 -0500
+@@ -123,6 +123,7 @@ config MPENTIUMM
+ config MPENTIUM4
+ 	bool "Pentium-4/Celeron(P4-based)/Pentium-4 M/older Xeon"
+ 	depends on X86_32
++	select X86_P6_NOP
+ 	---help---
+ 	  Select this for Intel Pentium 4 chips.  This includes the
+ 	  Pentium 4, Pentium D, P4-based Celeron and Xeon, and
+@@ -155,9 +156,8 @@ config MPENTIUM4
+ 		-Paxville
+ 		-Dempsey
+ 
+-
+ config MK6
+-	bool "K6/K6-II/K6-III"
++	bool "AMD K6/K6-II/K6-III"
+ 	depends on X86_32
+ 	---help---
+ 	  Select this for an AMD K6-family processor.  Enables use of
+@@ -165,7 +165,7 @@ config MK6
+ 	  flags to GCC.
+ 
+ config MK7
+-	bool "Athlon/Duron/K7"
++	bool "AMD Athlon/Duron/K7"
+ 	depends on X86_32
+ 	---help---
+ 	  Select this for an AMD Athlon K7-family processor.  Enables use of
+@@ -173,12 +173,90 @@ config MK7
+ 	  flags to GCC.
+ 
+ config MK8
+-	bool "Opteron/Athlon64/Hammer/K8"
++	bool "AMD Opteron/Athlon64/Hammer/K8"
+ 	---help---
+ 	  Select this for an AMD Opteron or Athlon64 Hammer-family processor.
+ 	  Enables use of some extended instructions, and passes appropriate
+ 	  optimization flags to GCC.
+ 
++config MK8SSE3
++	bool "AMD Opteron/Athlon64/Hammer/K8 with SSE3"
++	---help---
++	  Select this for improved AMD Opteron or Athlon64 Hammer-family processors.
++	  Enables use of some extended instructions, and passes appropriate
++	  optimization flags to GCC.
++
++config MK10
++	bool "AMD 61xx/7x50/PhenomX3/X4/II/K10"
++	---help---
++	  Select this for an AMD 61xx Eight-Core Magny-Cours, Athlon X2 7x50,
++		Phenom X3/X4/II, Athlon II X2/X3/X4, or Turion II-family processor.
++	  Enables use of some extended instructions, and passes appropriate
++	  optimization flags to GCC.
++
++config MBARCELONA
++	bool "AMD Barcelona"
++	---help---
++	  Select this for AMD Family 10h Barcelona processors.
++
++	  Enables -march=barcelona
++
++config MBOBCAT
++	bool "AMD Bobcat"
++	---help---
++	  Select this for AMD Family 14h Bobcat processors.
++
++	  Enables -march=btver1
++
++config MJAGUAR
++	bool "AMD Jaguar"
++	---help---
++	  Select this for AMD Family 16h Jaguar processors.
++
++	  Enables -march=btver2
++
++config MBULLDOZER
++	bool "AMD Bulldozer"
++	---help---
++	  Select this for AMD Family 15h Bulldozer processors.
++
++	  Enables -march=bdver1
++
++config MPILEDRIVER
++	bool "AMD Piledriver"
++	---help---
++	  Select this for AMD Family 15h Piledriver processors.
++
++	  Enables -march=bdver2
++
++config MSTEAMROLLER
++	bool "AMD Steamroller"
++	---help---
++	  Select this for AMD Family 15h Steamroller processors.
++
++	  Enables -march=bdver3
++
++config MEXCAVATOR
++	bool "AMD Excavator"
++	---help---
++	  Select this for AMD Family 15h Excavator processors.
++
++	  Enables -march=bdver4
++
++config MZEN
++	bool "AMD Zen"
++	---help---
++	  Select this for AMD Family 17h Zen processors.
++
++	  Enables -march=znver1
++
++config MZEN2
++	bool "AMD Zen 2"
++	---help---
++	  Select this for AMD Family 17h Zen 2 processors.
++
++	  Enables -march=znver2
++
+ config MCRUSOE
+ 	bool "Crusoe"
+ 	depends on X86_32
+@@ -260,6 +338,7 @@ config MVIAC7
+ 
+ config MPSC
+ 	bool "Intel P4 / older Netburst based Xeon"
++	select X86_P6_NOP
+ 	depends on X86_64
+ 	---help---
+ 	  Optimize for Intel Pentium 4, Pentium D and older Nocona/Dempsey
+@@ -269,8 +348,19 @@ config MPSC
+ 	  using the cpu family field
+ 	  in /proc/cpuinfo. Family 15 is an older Xeon, Family 6 a newer one.
+ 
++config MATOM
++	bool "Intel Atom"
++	select X86_P6_NOP
++	---help---
++
++	  Select this for the Intel Atom platform. Intel Atom CPUs have an
++	  in-order pipelining architecture and thus can benefit from
++	  accordingly optimized code. Use a recent GCC with specific Atom
++	  support in order to fully benefit from selecting this option.
++
+ config MCORE2
+-	bool "Core 2/newer Xeon"
++	bool "Intel Core 2"
++	select X86_P6_NOP
+ 	---help---
+ 
+ 	  Select this for Intel Core 2 and newer Core 2 Xeons (Xeon 51xx and
+@@ -278,14 +368,133 @@ config MCORE2
+ 	  family in /proc/cpuinfo. Newer ones have 6 and older ones 15
+ 	  (not a typo)
+ 
+-config MATOM
+-	bool "Intel Atom"
++	  Enables -march=core2
++
++config MNEHALEM
++	bool "Intel Nehalem"
++	select X86_P6_NOP
+ 	---help---
+ 
+-	  Select this for the Intel Atom platform. Intel Atom CPUs have an
+-	  in-order pipelining architecture and thus can benefit from
+-	  accordingly optimized code. Use a recent GCC with specific Atom
+-	  support in order to fully benefit from selecting this option.
++	  Select this for 1st Gen Core processors in the Nehalem family.
++
++	  Enables -march=nehalem
++
++config MWESTMERE
++	bool "Intel Westmere"
++	select X86_P6_NOP
++	---help---
++
++	  Select this for the Intel Westmere formerly Nehalem-C family.
++
++	  Enables -march=westmere
++
++config MSILVERMONT
++	bool "Intel Silvermont"
++	select X86_P6_NOP
++	---help---
++
++	  Select this for the Intel Silvermont platform.
++
++	  Enables -march=silvermont
++
++config MGOLDMONT
++	bool "Intel Goldmont"
++	select X86_P6_NOP
++	---help---
++
++	  Select this for the Intel Goldmont platform including Apollo Lake and Denverton.
++
++	  Enables -march=goldmont
++
++config MGOLDMONTPLUS
++	bool "Intel Goldmont Plus"
++	select X86_P6_NOP
++	---help---
++
++	  Select this for the Intel Goldmont Plus platform including Gemini Lake.
++
++	  Enables -march=goldmont-plus
++
++config MSANDYBRIDGE
++	bool "Intel Sandy Bridge"
++	select X86_P6_NOP
++	---help---
++
++	  Select this for 2nd Gen Core processors in the Sandy Bridge family.
++
++	  Enables -march=sandybridge
++
++config MIVYBRIDGE
++	bool "Intel Ivy Bridge"
++	select X86_P6_NOP
++	---help---
++
++	  Select this for 3rd Gen Core processors in the Ivy Bridge family.
++
++	  Enables -march=ivybridge
++
++config MHASWELL
++	bool "Intel Haswell"
++	select X86_P6_NOP
++	---help---
++
++	  Select this for 4th Gen Core processors in the Haswell family.
++
++	  Enables -march=haswell
++
++config MBROADWELL
++	bool "Intel Broadwell"
++	select X86_P6_NOP
++	---help---
++
++	  Select this for 5th Gen Core processors in the Broadwell family.
++
++	  Enables -march=broadwell
++
++config MSKYLAKE
++	bool "Intel Skylake"
++	select X86_P6_NOP
++	---help---
++
++	  Select this for 6th Gen Core processors in the Skylake family.
++
++	  Enables -march=skylake
++
++config MSKYLAKEX
++	bool "Intel Skylake X"
++	select X86_P6_NOP
++	---help---
++
++	  Select this for 6th Gen Core processors in the Skylake X family.
++
++	  Enables -march=skylake-avx512
++
++config MCANNONLAKE
++	bool "Intel Cannon Lake"
++	select X86_P6_NOP
++	---help---
++
++	  Select this for 8th Gen Core processors
++
++	  Enables -march=cannonlake
++
++config MICELAKE
++	bool "Intel Ice Lake"
++	select X86_P6_NOP
++	---help---
++
++	  Select this for 10th Gen Core processors in the Ice Lake family.
++
++	  Enables -march=icelake-client
++
++config MCASCADELAKE
++	bool "Intel Cascade Lake"
++	select X86_P6_NOP
++	---help---
++
++	  Select this for Xeon processors in the Cascade Lake family.
++
++	  Enables -march=cascadelake
+ 
+ config GENERIC_CPU
+ 	bool "Generic-x86-64"
+@@ -294,6 +503,19 @@ config GENERIC_CPU
+ 	  Generic x86-64 CPU.
+ 	  Run equally well on all x86-64 CPUs.
+ 
++config MNATIVE
++ bool "Native optimizations autodetected by GCC"
++ ---help---
++
++   GCC 4.2 and above support -march=native, which automatically detects
++   the optimum settings to use based on your processor. -march=native
++   also detects and applies additional settings beyond -march specific
++   to your CPU, (eg. -msse4). Unless you have a specific reason not to
++   (e.g. distcc cross-compiling), you should probably be using
++   -march=native rather than anything listed below.
++
++   Enables -march=native
++
+ endchoice
+ 
+ config X86_GENERIC
+@@ -318,7 +540,7 @@ config X86_INTERNODE_CACHE_SHIFT
+ config X86_L1_CACHE_SHIFT
+ 	int
+ 	default "7" if MPENTIUM4 || MPSC
+-	default "6" if MK7 || MK8 || MPENTIUMM || MCORE2 || MATOM || MVIAC7 || X86_GENERIC || GENERIC_CPU
++	default "6" if MK7 || MK8 || MK8SSE3 || MK10 || MBARCELONA || MBOBCAT || MBULLDOZER || MPILEDRIVER || MSTEAMROLLER || MEXCAVATOR || MZEN || MZEN2 || MJAGUAR || MPENTIUMM || MCORE2 || MNEHALEM || MWESTMERE || MSILVERMONT || MGOLDMONT || MGOLDMONTPLUS || MSANDYBRIDGE || MIVYBRIDGE || MHASWELL || MBROADWELL || MSKYLAKE || MSKYLAKEX || MCANNONLAKE || MICELAKE || MCASCADELAKE || MNATIVE || MATOM || MVIAC7 || X86_GENERIC || GENERIC_CPU
+ 	default "4" if MELAN || M486SX || M486 || MGEODEGX1
+ 	default "5" if MWINCHIP3D || MWINCHIPC6 || MCRUSOE || MEFFICEON || MCYRIXIII || MK6 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || M586 || MVIAC3_2 || MGEODE_LX
+ 
+@@ -336,35 +558,36 @@ config X86_ALIGNMENT_16
+ 
+ config X86_INTEL_USERCOPY
+ 	def_bool y
+-	depends on MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M586MMX || X86_GENERIC || MK8 || MK7 || MEFFICEON || MCORE2
++	depends on MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M586MMX || X86_GENERIC || MK8 || MK8SSE3 || MK7 || MEFFICEON || MCORE2 || MK10 || MBARCELONA || MNEHALEM || MWESTMERE || MSILVERMONT || MGOLDMONT || MGOLDMONTPLUS || MSANDYBRIDGE || MIVYBRIDGE || MHASWELL || MBROADWELL || MSKYLAKE || MSKYLAKEX || MCANNONLAKE || MICELAKE || MCASCADELAKE || MNATIVE
+ 
+ config X86_USE_PPRO_CHECKSUM
+ 	def_bool y
+-	depends on MWINCHIP3D || MWINCHIPC6 || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MK8 || MVIAC3_2 || MVIAC7 || MEFFICEON || MGEODE_LX || MCORE2 || MATOM
++	depends on MWINCHIP3D || MWINCHIPC6 || MCYRIXIII || MK7 || MK6 || MK10 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MK8 || MK8SSE3 || MVIAC3_2 || MVIAC7 || MEFFICEON || MGEODE_LX || MCORE2 || MNEHALEM || MWESTMERE || MSILVERMONT || MGOLDMONT || MGOLDMONTPLUS || MSANDYBRIDGE || MIVYBRIDGE || MHASWELL || MBROADWELL || MSKYLAKE || MSKYLAKEX || MCANNONLAKE || MICELAKE || MCASCADELAKE || MATOM || MNATIVE
+ 
+ config X86_USE_3DNOW
+ 	def_bool y
+ 	depends on (MCYRIXIII || MK7 || MGEODE_LX) && !UML
+ 
+-#
+-# P6_NOPs are a relatively minor optimization that require a family >=
+-# 6 processor, except that it is broken on certain VIA chips.
+-# Furthermore, AMD chips prefer a totally different sequence of NOPs
+-# (which work on all CPUs).  In addition, it looks like Virtual PC
+-# does not understand them.
+-#
+-# As a result, disallow these if we're not compiling for X86_64 (these
+-# NOPs do work on all x86-64 capable chips); the list of processors in
+-# the right-hand clause are the cores that benefit from this optimization.
+-#
+ config X86_P6_NOP
+-	def_bool y
+-	depends on X86_64
+-	depends on (MCORE2 || MPENTIUM4 || MPSC)
++	default n
++	bool "Support for P6_NOPs on Intel chips"
++	depends on (MCORE2 || MPENTIUM4 || MPSC || MATOM || MNEHALEM || MWESTMERE || MSILVERMONT || MGOLDMONT || MGOLDMONTPLUS  || MSANDYBRIDGE || MIVYBRIDGE || MHASWELL || MBROADWELL || MSKYLAKE || MSKYLAKEX || MCANNONLAKE || MICELAKE || MCASCADELAKE || MNATIVE)
++	---help---
++	P6_NOPs are a relatively minor optimization that require a family >=
++	6 processor, except that it is broken on certain VIA chips.
++	Furthermore, AMD chips prefer a totally different sequence of NOPs
++	(which work on all CPUs).  In addition, it looks like Virtual PC
++	does not understand them.
++
++	As a result, disallow these if we're not compiling for X86_64 (these
++	NOPs do work on all x86-64 capable chips); the list of processors in
++	the right-hand clause are the cores that benefit from this optimization.
++
++	Say Y if you have Intel CPU newer than Pentium Pro, N otherwise.
+ 
+ config X86_TSC
+ 	def_bool y
+-	depends on (MWINCHIP3D || MCRUSOE || MEFFICEON || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || MK8 || MVIAC3_2 || MVIAC7 || MGEODEGX1 || MGEODE_LX || MCORE2 || MATOM) || X86_64
++	depends on (MWINCHIP3D || MCRUSOE || MEFFICEON || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || MK8 || MK8SSE3 || MVIAC3_2 || MVIAC7 || MGEODEGX1 || MGEODE_LX || MCORE2 || MNEHALEM || MWESTMERE || MSILVERMONT || MGOLDMONT || MGOLDMONTPLUS || MSANDYBRIDGE || MIVYBRIDGE || MHASWELL || MBROADWELL || MSKYLAKE || MSKYLAKEX || MCANNONLAKE || MICELAKE || MCASCADELAKE || MNATIVE || MATOM) || X86_64
+ 
+ config X86_CMPXCHG64
+ 	def_bool y
+@@ -374,7 +597,7 @@ config X86_CMPXCHG64
+ # generates cmov.
+ config X86_CMOV
+ 	def_bool y
+-	depends on (MK8 || MK7 || MCORE2 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MVIAC3_2 || MVIAC7 || MCRUSOE || MEFFICEON || X86_64 || MATOM || MGEODE_LX)
++	depends on (MK8 || MK8SSE3 || MK10 || MBARCELONA || MBOBCAT || MBULLDOZER || MPILEDRIVER || MSTEAMROLLER || MEXCAVATOR || MZEN || MZEN2 || MJAGUAR || MK7 || MCORE2 || MNEHALEM || MWESTMERE || MSILVERMONT || MGOLDMONT || MGOLDMONTPLUS || MSANDYBRIDGE || MIVYBRIDGE || MHASWELL || MBROADWELL || MSKYLAKE || MSKYLAKEX || MCANNONLAKE || MICELAKE || MCASCADELAKE || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MVIAC3_2 || MVIAC7 || MCRUSOE || MEFFICEON || X86_64 || MNATIVE || MATOM || MGEODE_LX)
+ 
+ config X86_MINIMUM_CPU_FAMILY
+ 	int
+--- a/arch/x86/Makefile	2019-12-15 18:16:08.000000000 -0500
++++ b/arch/x86/Makefile	2019-12-17 14:03:55.972204960 -0500
+@@ -119,13 +119,53 @@ else
+ 	KBUILD_CFLAGS += $(call cc-option,-mskip-rax-setup)
+ 
+         # FIXME - should be integrated in Makefile.cpu (Makefile_32.cpu)
++        cflags-$(CONFIG_MNATIVE) += $(call cc-option,-march=native)
+         cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8)
++        cflags-$(CONFIG_MK8SSE3) += $(call cc-option,-march=k8-sse3,-mtune=k8)
++        cflags-$(CONFIG_MK10) += $(call cc-option,-march=amdfam10)
++        cflags-$(CONFIG_MBARCELONA) += $(call cc-option,-march=barcelona)
++        cflags-$(CONFIG_MBOBCAT) += $(call cc-option,-march=btver1)
++        cflags-$(CONFIG_MJAGUAR) += $(call cc-option,-march=btver2)
++        cflags-$(CONFIG_MBULLDOZER) += $(call cc-option,-march=bdver1)
++        cflags-$(CONFIG_MPILEDRIVER) += $(call cc-option,-march=bdver2)
++        cflags-$(CONFIG_MSTEAMROLLER) += $(call cc-option,-march=bdver3)
++        cflags-$(CONFIG_MEXCAVATOR) += $(call cc-option,-march=bdver4)
++        cflags-$(CONFIG_MZEN) += $(call cc-option,-march=znver1)
++        cflags-$(CONFIG_MZEN2) += $(call cc-option,-march=znver2)
+         cflags-$(CONFIG_MPSC) += $(call cc-option,-march=nocona)
+ 
+         cflags-$(CONFIG_MCORE2) += \
+-                $(call cc-option,-march=core2,$(call cc-option,-mtune=generic))
+-	cflags-$(CONFIG_MATOM) += $(call cc-option,-march=atom) \
+-		$(call cc-option,-mtune=atom,$(call cc-option,-mtune=generic))
++                $(call cc-option,-march=core2,$(call cc-option,-mtune=core2))
++        cflags-$(CONFIG_MNEHALEM) += \
++                $(call cc-option,-march=nehalem,$(call cc-option,-mtune=nehalem))
++        cflags-$(CONFIG_MWESTMERE) += \
++                $(call cc-option,-march=westmere,$(call cc-option,-mtune=westmere))
++        cflags-$(CONFIG_MSILVERMONT) += \
++                $(call cc-option,-march=silvermont,$(call cc-option,-mtune=silvermont))
++        cflags-$(CONFIG_MGOLDMONT) += \
++                $(call cc-option,-march=goldmont,$(call cc-option,-mtune=goldmont))
++        cflags-$(CONFIG_MGOLDMONTPLUS) += \
++                $(call cc-option,-march=goldmont-plus,$(call cc-option,-mtune=goldmont-plus))
++        cflags-$(CONFIG_MSANDYBRIDGE) += \
++                $(call cc-option,-march=sandybridge,$(call cc-option,-mtune=sandybridge))
++        cflags-$(CONFIG_MIVYBRIDGE) += \
++                $(call cc-option,-march=ivybridge,$(call cc-option,-mtune=ivybridge))
++        cflags-$(CONFIG_MHASWELL) += \
++                $(call cc-option,-march=haswell,$(call cc-option,-mtune=haswell))
++        cflags-$(CONFIG_MBROADWELL) += \
++                $(call cc-option,-march=broadwell,$(call cc-option,-mtune=broadwell))
++        cflags-$(CONFIG_MSKYLAKE) += \
++                $(call cc-option,-march=skylake,$(call cc-option,-mtune=skylake))
++        cflags-$(CONFIG_MSKYLAKEX) += \
++                $(call cc-option,-march=skylake-avx512,$(call cc-option,-mtune=skylake-avx512))
++        cflags-$(CONFIG_MCANNONLAKE) += \
++                $(call cc-option,-march=cannonlake,$(call cc-option,-mtune=cannonlake))
++        cflags-$(CONFIG_MICELAKE) += \
++                $(call cc-option,-march=icelake-client,$(call cc-option,-mtune=icelake-client))
++        cflags-$(CONFIG_MCASCADELAKE) += \
++                $(call cc-option,-march=cascadelake,$(call cc-option,-mtune=cascadelake))
++        cflags-$(CONFIG_MATOM) += $(call cc-option,-march=bonnell) \
++                $(call cc-option,-mtune=bonnell,$(call cc-option,-mtune=generic))
+         cflags-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=generic)
+         KBUILD_CFLAGS += $(cflags-y)
+ 
+--- a/arch/x86/Makefile_32.cpu	2019-12-15 18:16:08.000000000 -0500
++++ b/arch/x86/Makefile_32.cpu	2019-12-17 14:03:55.972204960 -0500
+@@ -24,7 +24,19 @@ cflags-$(CONFIG_MK6)		+= -march=k6
+ # Please note, that patches that add -march=athlon-xp and friends are pointless.
+ # They make zero difference whatsosever to performance at this time.
+ cflags-$(CONFIG_MK7)		+= -march=athlon
++cflags-$(CONFIG_MNATIVE) += $(call cc-option,-march=native)
+ cflags-$(CONFIG_MK8)		+= $(call cc-option,-march=k8,-march=athlon)
++cflags-$(CONFIG_MK8SSE3)		+= $(call cc-option,-march=k8-sse3,-march=athlon)
++cflags-$(CONFIG_MK10)	+= $(call cc-option,-march=amdfam10,-march=athlon)
++cflags-$(CONFIG_MBARCELONA)	+= $(call cc-option,-march=barcelona,-march=athlon)
++cflags-$(CONFIG_MBOBCAT)	+= $(call cc-option,-march=btver1,-march=athlon)
++cflags-$(CONFIG_MJAGUAR)	+= $(call cc-option,-march=btver2,-march=athlon)
++cflags-$(CONFIG_MBULLDOZER)	+= $(call cc-option,-march=bdver1,-march=athlon)
++cflags-$(CONFIG_MPILEDRIVER)	+= $(call cc-option,-march=bdver2,-march=athlon)
++cflags-$(CONFIG_MSTEAMROLLER)	+= $(call cc-option,-march=bdver3,-march=athlon)
++cflags-$(CONFIG_MEXCAVATOR)	+= $(call cc-option,-march=bdver4,-march=athlon)
++cflags-$(CONFIG_MZEN)	+= $(call cc-option,-march=znver1,-march=athlon)
++cflags-$(CONFIG_MZEN2)	+= $(call cc-option,-march=znver2,-march=athlon)
+ cflags-$(CONFIG_MCRUSOE)	+= -march=i686 -falign-functions=0 -falign-jumps=0 -falign-loops=0
+ cflags-$(CONFIG_MEFFICEON)	+= -march=i686 $(call tune,pentium3) -falign-functions=0 -falign-jumps=0 -falign-loops=0
+ cflags-$(CONFIG_MWINCHIPC6)	+= $(call cc-option,-march=winchip-c6,-march=i586)
+@@ -33,8 +45,22 @@ cflags-$(CONFIG_MCYRIXIII)	+= $(call cc-
+ cflags-$(CONFIG_MVIAC3_2)	+= $(call cc-option,-march=c3-2,-march=i686)
+ cflags-$(CONFIG_MVIAC7)		+= -march=i686
+ cflags-$(CONFIG_MCORE2)		+= -march=i686 $(call tune,core2)
+-cflags-$(CONFIG_MATOM)		+= $(call cc-option,-march=atom,$(call cc-option,-march=core2,-march=i686)) \
+-	$(call cc-option,-mtune=atom,$(call cc-option,-mtune=generic))
++cflags-$(CONFIG_MNEHALEM)	+= -march=i686 $(call tune,nehalem)
++cflags-$(CONFIG_MWESTMERE)	+= -march=i686 $(call tune,westmere)
++cflags-$(CONFIG_MSILVERMONT)	+= -march=i686 $(call tune,silvermont)
++cflags-$(CONFIG_MGOLDMONT)	+= -march=i686 $(call tune,goldmont)
++cflags-$(CONFIG_MGOLDMONTPLUS)	+= -march=i686 $(call tune,goldmont-plus)
++cflags-$(CONFIG_MSANDYBRIDGE)	+= -march=i686 $(call tune,sandybridge)
++cflags-$(CONFIG_MIVYBRIDGE)	+= -march=i686 $(call tune,ivybridge)
++cflags-$(CONFIG_MHASWELL)	+= -march=i686 $(call tune,haswell)
++cflags-$(CONFIG_MBROADWELL)	+= -march=i686 $(call tune,broadwell)
++cflags-$(CONFIG_MSKYLAKE)	+= -march=i686 $(call tune,skylake)
++cflags-$(CONFIG_MSKYLAKEX)	+= -march=i686 $(call tune,skylake-avx512)
++cflags-$(CONFIG_MCANNONLAKE)	+= -march=i686 $(call tune,cannonlake)
++cflags-$(CONFIG_MICELAKE)	+= -march=i686 $(call tune,icelake-client)
++cflags-$(CONFIG_MCASCADELAKE)	+= -march=i686 $(call tune,cascadelake)
++cflags-$(CONFIG_MATOM)		+= $(call cc-option,-march=bonnell,$(call cc-option,-march=core2,-march=i686)) \
++	$(call cc-option,-mtune=bonnell,$(call cc-option,-mtune=generic))
+ 
+ # AMD Elan support
+ cflags-$(CONFIG_MELAN)		+= -march=i486