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commit: a9061a017c09a5f820288d1049de859786f14b1f |
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Author: Mike Pagano <mpagano <AT> gentoo <DOT> org> |
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AuthorDate: Fri Aug 23 22:15:21 2019 +0000 |
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Commit: Mike Pagano <mpagano <AT> gentoo <DOT> org> |
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CommitDate: Tue Oct 29 13:59:02 2019 +0000 |
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URL: https://gitweb.gentoo.org/proj/linux-patches.git/commit/?id=a9061a01 |
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|
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Kernel patch enables gcc >= v9.1 optimizations for additional CPUs. |
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|
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Signed-off-by: Mike Pagano <mpagano <AT> gentoo.org> |
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|
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0000_README | 4 + |
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5012_enable-cpu-optimizations-for-gcc91.patch | 632 ++++++++++++++++++++++++++ |
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2 files changed, 636 insertions(+) |
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|
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diff --git a/0000_README b/0000_README |
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index 4659ab2..9510e96 100644 |
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--- a/0000_README |
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+++ b/0000_README |
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@@ -654,3 +654,7 @@ Desc: Add Gentoo Linux support config settings and defaults. |
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Patch: 5010_enable-additional-cpu-optimizations-for-gcc-4.9.patch |
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From: https://github.com/graysky2/kernel_gcc_patch/ |
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Desc: Kernel patch enables gcc >= v4.13 optimizations for additional CPUs. |
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+ |
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+Patch: 5012_enable-cpu-optimizations-for-gcc91.patch |
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+From: https://github.com/graysky2/kernel_gcc_patch/ |
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+Desc: Kernel patch enables gcc >= v9.1 optimizations for additional CPUs. |
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|
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diff --git a/5012_enable-cpu-optimizations-for-gcc91.patch b/5012_enable-cpu-optimizations-for-gcc91.patch |
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new file mode 100644 |
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index 0000000..dffd36d |
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--- /dev/null |
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+++ b/5012_enable-cpu-optimizations-for-gcc91.patch |
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@@ -0,0 +1,632 @@ |
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+WARNING |
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+This patch works with gcc versions 9.1+ and with kernel version 4.13+ and should |
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+NOT be applied when compiling on older versions of gcc due to key name changes |
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+of the march flags introduced with the version 4.9 release of gcc.[1] |
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+ |
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+Use the older version of this patch hosted on the same github for older |
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+versions of gcc. |
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+ |
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+FEATURES |
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+This patch adds additional CPU options to the Linux kernel accessible under: |
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+ Processor type and features ---> |
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+ Processor family ---> |
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+ |
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+The expanded microarchitectures include: |
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+* AMD Improved K8-family |
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+* AMD K10-family |
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+* AMD Family 10h (Barcelona) |
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+* AMD Family 14h (Bobcat) |
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+* AMD Family 16h (Jaguar) |
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+* AMD Family 15h (Bulldozer) |
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+* AMD Family 15h (Piledriver) |
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+* AMD Family 15h (Steamroller) |
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+* AMD Family 15h (Excavator) |
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+* AMD Family 17h (Zen) |
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+* AMD Family 17h (Zen 2) |
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+* Intel Silvermont low-power processors |
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+* Intel Goldmont low-power processors (Apollo Lake and Denverton) |
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+* Intel Goldmont Plus low-power processors (Gemini Lake) |
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+* Intel 1st Gen Core i3/i5/i7 (Nehalem) |
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+* Intel 1.5 Gen Core i3/i5/i7 (Westmere) |
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+* Intel 2nd Gen Core i3/i5/i7 (Sandybridge) |
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+* Intel 3rd Gen Core i3/i5/i7 (Ivybridge) |
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+* Intel 4th Gen Core i3/i5/i7 (Haswell) |
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+* Intel 5th Gen Core i3/i5/i7 (Broadwell) |
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+* Intel 6th Gen Core i3/i5/i7 (Skylake) |
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+* Intel 6th Gen Core i7/i9 (Skylake X) |
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+* Intel 8th Gen Core i3/i5/i7 (Cannon Lake) |
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+* Intel 10th Gen Core i7/i9 (Ice Lake) |
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+* Intel Xeon (Cascade Lake) |
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+ |
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+It also offers to compile passing the 'native' option which, "selects the CPU |
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+to generate code for at compilation time by determining the processor type of |
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+the compiling machine. Using -march=native enables all instruction subsets |
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+supported by the local machine and will produce code optimized for the local |
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+machine under the constraints of the selected instruction set."[3] |
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+ |
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+MINOR NOTES |
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+This patch also changes 'atom' to 'bonnell' in accordance with the gcc v4.9 |
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+changes. Note that upstream is using the deprecated 'match=atom' flags when I |
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+believe it should use the newer 'march=bonnell' flag for atom processors.[2] |
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+ |
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+It is not recommended to compile on Atom-CPUs with the 'native' option.[4] The |
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+recommendation is to use the 'atom' option instead. |
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+ |
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+BENEFITS |
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+Small but real speed increases are measurable using a make endpoint comparing |
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+a generic kernel to one built with one of the respective microarchs. |
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+ |
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+See the following experimental evidence supporting this statement: |
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+https://github.com/graysky2/kernel_gcc_patch |
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+ |
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+REQUIREMENTS |
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+linux version >=4.13 |
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+gcc version >=9.1 |
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+ |
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+ACKNOWLEDGMENTS |
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+This patch builds on the seminal work by Jeroen.[5] |
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+ |
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+REFERENCES |
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+1. https://gcc.gnu.org/gcc-4.9/changes.html |
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+2. https://bugzilla.kernel.org/show_bug.cgi?id=77461 |
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+3. https://gcc.gnu.org/onlinedocs/gcc/x86-Options.html |
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+4. https://github.com/graysky2/kernel_gcc_patch/issues/15 |
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+5. http://www.linuxforge.net/docs/linux/linux-gcc.php |
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+ |
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+--- a/arch/x86/include/asm/module.h 2019-08-16 04:11:12.000000000 -0400 |
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++++ b/arch/x86/include/asm/module.h 2019-08-22 15:56:23.988050322 -0400 |
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+@@ -25,6 +25,36 @@ struct mod_arch_specific { |
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+ #define MODULE_PROC_FAMILY "586MMX " |
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+ #elif defined CONFIG_MCORE2 |
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+ #define MODULE_PROC_FAMILY "CORE2 " |
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++#elif defined CONFIG_MNATIVE |
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++#define MODULE_PROC_FAMILY "NATIVE " |
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++#elif defined CONFIG_MNEHALEM |
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++#define MODULE_PROC_FAMILY "NEHALEM " |
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++#elif defined CONFIG_MWESTMERE |
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++#define MODULE_PROC_FAMILY "WESTMERE " |
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++#elif defined CONFIG_MSILVERMONT |
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++#define MODULE_PROC_FAMILY "SILVERMONT " |
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++#elif defined CONFIG_MGOLDMONT |
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++#define MODULE_PROC_FAMILY "GOLDMONT " |
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++#elif defined CONFIG_MGOLDMONTPLUS |
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++#define MODULE_PROC_FAMILY "GOLDMONTPLUS " |
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++#elif defined CONFIG_MSANDYBRIDGE |
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++#define MODULE_PROC_FAMILY "SANDYBRIDGE " |
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++#elif defined CONFIG_MIVYBRIDGE |
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++#define MODULE_PROC_FAMILY "IVYBRIDGE " |
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++#elif defined CONFIG_MHASWELL |
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++#define MODULE_PROC_FAMILY "HASWELL " |
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++#elif defined CONFIG_MBROADWELL |
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++#define MODULE_PROC_FAMILY "BROADWELL " |
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++#elif defined CONFIG_MSKYLAKE |
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++#define MODULE_PROC_FAMILY "SKYLAKE " |
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++#elif defined CONFIG_MSKYLAKEX |
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++#define MODULE_PROC_FAMILY "SKYLAKEX " |
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++#elif defined CONFIG_MCANNONLAKE |
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++#define MODULE_PROC_FAMILY "CANNONLAKE " |
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++#elif defined CONFIG_MICELAKE |
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++#define MODULE_PROC_FAMILY "ICELAKE " |
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++#elif defined CONFIG_MCASCADELAKE |
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++#define MODULE_PROC_FAMILY "CASCADELAKE " |
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+ #elif defined CONFIG_MATOM |
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+ #define MODULE_PROC_FAMILY "ATOM " |
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+ #elif defined CONFIG_M686 |
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+@@ -43,6 +73,28 @@ struct mod_arch_specific { |
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+ #define MODULE_PROC_FAMILY "K7 " |
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+ #elif defined CONFIG_MK8 |
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+ #define MODULE_PROC_FAMILY "K8 " |
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++#elif defined CONFIG_MK8SSE3 |
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++#define MODULE_PROC_FAMILY "K8SSE3 " |
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++#elif defined CONFIG_MK10 |
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++#define MODULE_PROC_FAMILY "K10 " |
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++#elif defined CONFIG_MBARCELONA |
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++#define MODULE_PROC_FAMILY "BARCELONA " |
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++#elif defined CONFIG_MBOBCAT |
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++#define MODULE_PROC_FAMILY "BOBCAT " |
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++#elif defined CONFIG_MBULLDOZER |
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++#define MODULE_PROC_FAMILY "BULLDOZER " |
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++#elif defined CONFIG_MPILEDRIVER |
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++#define MODULE_PROC_FAMILY "PILEDRIVER " |
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++#elif defined CONFIG_MSTEAMROLLER |
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++#define MODULE_PROC_FAMILY "STEAMROLLER " |
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++#elif defined CONFIG_MJAGUAR |
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++#define MODULE_PROC_FAMILY "JAGUAR " |
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++#elif defined CONFIG_MEXCAVATOR |
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++#define MODULE_PROC_FAMILY "EXCAVATOR " |
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++#elif defined CONFIG_MZEN |
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++#define MODULE_PROC_FAMILY "ZEN " |
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++#elif defined CONFIG_MZEN2 |
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++#define MODULE_PROC_FAMILY "ZEN2 " |
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+ #elif defined CONFIG_MELAN |
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+ #define MODULE_PROC_FAMILY "ELAN " |
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+ #elif defined CONFIG_MCRUSOE |
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+--- a/arch/x86/Kconfig.cpu 2019-08-16 04:11:12.000000000 -0400 |
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++++ b/arch/x86/Kconfig.cpu 2019-08-22 15:59:31.596946943 -0400 |
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+@@ -116,6 +116,7 @@ config MPENTIUMM |
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+ config MPENTIUM4 |
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+ bool "Pentium-4/Celeron(P4-based)/Pentium-4 M/older Xeon" |
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+ depends on X86_32 |
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++ select X86_P6_NOP |
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+ ---help--- |
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+ Select this for Intel Pentium 4 chips. This includes the |
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+ Pentium 4, Pentium D, P4-based Celeron and Xeon, and |
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+@@ -148,9 +149,8 @@ config MPENTIUM4 |
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+ -Paxville |
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+ -Dempsey |
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+ |
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+- |
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+ config MK6 |
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+- bool "K6/K6-II/K6-III" |
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++ bool "AMD K6/K6-II/K6-III" |
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+ depends on X86_32 |
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+ ---help--- |
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+ Select this for an AMD K6-family processor. Enables use of |
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+@@ -158,7 +158,7 @@ config MK6 |
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+ flags to GCC. |
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+ |
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+ config MK7 |
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+- bool "Athlon/Duron/K7" |
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++ bool "AMD Athlon/Duron/K7" |
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+ depends on X86_32 |
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+ ---help--- |
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+ Select this for an AMD Athlon K7-family processor. Enables use of |
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+@@ -166,12 +166,90 @@ config MK7 |
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+ flags to GCC. |
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+ |
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+ config MK8 |
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+- bool "Opteron/Athlon64/Hammer/K8" |
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++ bool "AMD Opteron/Athlon64/Hammer/K8" |
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+ ---help--- |
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+ Select this for an AMD Opteron or Athlon64 Hammer-family processor. |
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+ Enables use of some extended instructions, and passes appropriate |
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+ optimization flags to GCC. |
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+ |
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++config MK8SSE3 |
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++ bool "AMD Opteron/Athlon64/Hammer/K8 with SSE3" |
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++ ---help--- |
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++ Select this for improved AMD Opteron or Athlon64 Hammer-family processors. |
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++ Enables use of some extended instructions, and passes appropriate |
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++ optimization flags to GCC. |
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++ |
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++config MK10 |
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++ bool "AMD 61xx/7x50/PhenomX3/X4/II/K10" |
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++ ---help--- |
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++ Select this for an AMD 61xx Eight-Core Magny-Cours, Athlon X2 7x50, |
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++ Phenom X3/X4/II, Athlon II X2/X3/X4, or Turion II-family processor. |
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++ Enables use of some extended instructions, and passes appropriate |
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++ optimization flags to GCC. |
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++ |
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++config MBARCELONA |
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++ bool "AMD Barcelona" |
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++ ---help--- |
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++ Select this for AMD Family 10h Barcelona processors. |
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++ |
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++ Enables -march=barcelona |
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++ |
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++config MBOBCAT |
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++ bool "AMD Bobcat" |
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++ ---help--- |
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++ Select this for AMD Family 14h Bobcat processors. |
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++ |
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++ Enables -march=btver1 |
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++ |
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++config MJAGUAR |
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++ bool "AMD Jaguar" |
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++ ---help--- |
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++ Select this for AMD Family 16h Jaguar processors. |
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++ |
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++ Enables -march=btver2 |
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++ |
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++config MBULLDOZER |
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++ bool "AMD Bulldozer" |
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++ ---help--- |
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++ Select this for AMD Family 15h Bulldozer processors. |
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++ |
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++ Enables -march=bdver1 |
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++ |
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++config MPILEDRIVER |
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++ bool "AMD Piledriver" |
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++ ---help--- |
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++ Select this for AMD Family 15h Piledriver processors. |
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++ |
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++ Enables -march=bdver2 |
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++ |
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++config MSTEAMROLLER |
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++ bool "AMD Steamroller" |
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++ ---help--- |
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++ Select this for AMD Family 15h Steamroller processors. |
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++ |
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++ Enables -march=bdver3 |
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++ |
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++config MEXCAVATOR |
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++ bool "AMD Excavator" |
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++ ---help--- |
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++ Select this for AMD Family 15h Excavator processors. |
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++ |
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++ Enables -march=bdver4 |
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++ |
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++config MZEN |
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++ bool "AMD Zen" |
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++ ---help--- |
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++ Select this for AMD Family 17h Zen processors. |
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++ |
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++ Enables -march=znver1 |
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++ |
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++config MZEN2 |
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++ bool "AMD Zen 2" |
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++ ---help--- |
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++ Select this for AMD Family 17h Zen 2 processors. |
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++ |
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++ Enables -march=znver2 |
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++ |
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+ config MCRUSOE |
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+ bool "Crusoe" |
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+ depends on X86_32 |
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+@@ -253,6 +331,7 @@ config MVIAC7 |
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+ |
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+ config MPSC |
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+ bool "Intel P4 / older Netburst based Xeon" |
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++ select X86_P6_NOP |
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+ depends on X86_64 |
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+ ---help--- |
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+ Optimize for Intel Pentium 4, Pentium D and older Nocona/Dempsey |
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+@@ -262,8 +341,19 @@ config MPSC |
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+ using the cpu family field |
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+ in /proc/cpuinfo. Family 15 is an older Xeon, Family 6 a newer one. |
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+ |
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++config MATOM |
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++ bool "Intel Atom" |
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++ select X86_P6_NOP |
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++ ---help--- |
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++ |
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++ Select this for the Intel Atom platform. Intel Atom CPUs have an |
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++ in-order pipelining architecture and thus can benefit from |
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++ accordingly optimized code. Use a recent GCC with specific Atom |
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++ support in order to fully benefit from selecting this option. |
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++ |
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+ config MCORE2 |
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+- bool "Core 2/newer Xeon" |
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++ bool "Intel Core 2" |
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++ select X86_P6_NOP |
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+ ---help--- |
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+ |
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+ Select this for Intel Core 2 and newer Core 2 Xeons (Xeon 51xx and |
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+@@ -271,14 +361,133 @@ config MCORE2 |
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+ family in /proc/cpuinfo. Newer ones have 6 and older ones 15 |
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+ (not a typo) |
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+ |
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+-config MATOM |
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+- bool "Intel Atom" |
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++ Enables -march=core2 |
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++ |
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++config MNEHALEM |
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++ bool "Intel Nehalem" |
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++ select X86_P6_NOP |
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+ ---help--- |
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+ |
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+- Select this for the Intel Atom platform. Intel Atom CPUs have an |
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+- in-order pipelining architecture and thus can benefit from |
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+- accordingly optimized code. Use a recent GCC with specific Atom |
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+- support in order to fully benefit from selecting this option. |
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++ Select this for 1st Gen Core processors in the Nehalem family. |
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++ |
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++ Enables -march=nehalem |
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++ |
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++config MWESTMERE |
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++ bool "Intel Westmere" |
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++ select X86_P6_NOP |
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++ ---help--- |
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++ |
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++ Select this for the Intel Westmere formerly Nehalem-C family. |
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++ |
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++ Enables -march=westmere |
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++ |
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++config MSILVERMONT |
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++ bool "Intel Silvermont" |
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++ select X86_P6_NOP |
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++ ---help--- |
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++ |
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++ Select this for the Intel Silvermont platform. |
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++ |
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++ Enables -march=silvermont |
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++ |
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++config MGOLDMONT |
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++ bool "Intel Goldmont" |
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++ select X86_P6_NOP |
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++ ---help--- |
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++ |
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++ Select this for the Intel Goldmont platform including Apollo Lake and Denverton. |
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++ |
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++ Enables -march=goldmont |
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++ |
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++config MGOLDMONTPLUS |
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++ bool "Intel Goldmont Plus" |
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++ select X86_P6_NOP |
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++ ---help--- |
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++ |
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++ Select this for the Intel Goldmont Plus platform including Gemini Lake. |
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++ |
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++ Enables -march=goldmont-plus |
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++ |
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++config MSANDYBRIDGE |
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++ bool "Intel Sandy Bridge" |
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++ select X86_P6_NOP |
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++ ---help--- |
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++ |
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++ Select this for 2nd Gen Core processors in the Sandy Bridge family. |
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++ |
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++ Enables -march=sandybridge |
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++ |
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++config MIVYBRIDGE |
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++ bool "Intel Ivy Bridge" |
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++ select X86_P6_NOP |
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++ ---help--- |
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++ |
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++ Select this for 3rd Gen Core processors in the Ivy Bridge family. |
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++ |
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++ Enables -march=ivybridge |
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++ |
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++config MHASWELL |
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++ bool "Intel Haswell" |
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++ select X86_P6_NOP |
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++ ---help--- |
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++ |
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++ Select this for 4th Gen Core processors in the Haswell family. |
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++ |
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++ Enables -march=haswell |
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++ |
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++config MBROADWELL |
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++ bool "Intel Broadwell" |
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++ select X86_P6_NOP |
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++ ---help--- |
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++ |
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++ Select this for 5th Gen Core processors in the Broadwell family. |
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++ |
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++ Enables -march=broadwell |
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++ |
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++config MSKYLAKE |
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++ bool "Intel Skylake" |
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++ select X86_P6_NOP |
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++ ---help--- |
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++ |
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++ Select this for 6th Gen Core processors in the Skylake family. |
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++ |
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++ Enables -march=skylake |
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++ |
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++config MSKYLAKEX |
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++ bool "Intel Skylake X" |
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++ select X86_P6_NOP |
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++ ---help--- |
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++ |
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++ Select this for 6th Gen Core processors in the Skylake X family. |
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++ |
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++ Enables -march=skylake-avx512 |
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++ |
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++config MCANNONLAKE |
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++ bool "Intel Cannon Lake" |
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++ select X86_P6_NOP |
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++ ---help--- |
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++ |
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++ Select this for 8th Gen Core processors |
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++ |
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++ Enables -march=cannonlake |
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++ |
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++config MICELAKE |
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++ bool "Intel Ice Lake" |
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++ select X86_P6_NOP |
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++ ---help--- |
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++ |
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++ Select this for 10th Gen Core processors in the Ice Lake family. |
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++ |
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++ Enables -march=icelake-client |
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++ |
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++config MCASCADELAKE |
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++ bool "Intel Cascade Lake" |
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++ select X86_P6_NOP |
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++ ---help--- |
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++ |
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++ Select this for Xeon processors in the Cascade Lake family. |
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++ |
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++ Enables -march=cascadelake |
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+ |
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+ config GENERIC_CPU |
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+ bool "Generic-x86-64" |
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+@@ -287,6 +496,19 @@ config GENERIC_CPU |
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+ Generic x86-64 CPU. |
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+ Run equally well on all x86-64 CPUs. |
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+ |
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++config MNATIVE |
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++ bool "Native optimizations autodetected by GCC" |
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++ ---help--- |
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++ |
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++ GCC 4.2 and above support -march=native, which automatically detects |
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++ the optimum settings to use based on your processor. -march=native |
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++ also detects and applies additional settings beyond -march specific |
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++ to your CPU, (eg. -msse4). Unless you have a specific reason not to |
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++ (e.g. distcc cross-compiling), you should probably be using |
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++ -march=native rather than anything listed below. |
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++ |
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++ Enables -march=native |
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++ |
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+ endchoice |
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+ |
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+ config X86_GENERIC |
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+@@ -311,7 +533,7 @@ config X86_INTERNODE_CACHE_SHIFT |
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+ config X86_L1_CACHE_SHIFT |
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+ int |
492 |
+ default "7" if MPENTIUM4 || MPSC |
493 |
+- default "6" if MK7 || MK8 || MPENTIUMM || MCORE2 || MATOM || MVIAC7 || X86_GENERIC || GENERIC_CPU |
494 |
++ 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 |
495 |
+ default "4" if MELAN || M486 || MGEODEGX1 |
496 |
+ default "5" if MWINCHIP3D || MWINCHIPC6 || MCRUSOE || MEFFICEON || MCYRIXIII || MK6 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || M586 || MVIAC3_2 || MGEODE_LX |
497 |
+ |
498 |
+@@ -329,35 +551,36 @@ config X86_ALIGNMENT_16 |
499 |
+ |
500 |
+ config X86_INTEL_USERCOPY |
501 |
+ def_bool y |
502 |
+- depends on MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M586MMX || X86_GENERIC || MK8 || MK7 || MEFFICEON || MCORE2 |
503 |
++ 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 |
504 |
+ |
505 |
+ config X86_USE_PPRO_CHECKSUM |
506 |
+ def_bool y |
507 |
+- depends on MWINCHIP3D || MWINCHIPC6 || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MK8 || MVIAC3_2 || MVIAC7 || MEFFICEON || MGEODE_LX || MCORE2 || MATOM |
508 |
++ 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 |
509 |
+ |
510 |
+ config X86_USE_3DNOW |
511 |
+ def_bool y |
512 |
+ depends on (MCYRIXIII || MK7 || MGEODE_LX) && !UML |
513 |
+ |
514 |
+-# |
515 |
+-# P6_NOPs are a relatively minor optimization that require a family >= |
516 |
+-# 6 processor, except that it is broken on certain VIA chips. |
517 |
+-# Furthermore, AMD chips prefer a totally different sequence of NOPs |
518 |
+-# (which work on all CPUs). In addition, it looks like Virtual PC |
519 |
+-# does not understand them. |
520 |
+-# |
521 |
+-# As a result, disallow these if we're not compiling for X86_64 (these |
522 |
+-# NOPs do work on all x86-64 capable chips); the list of processors in |
523 |
+-# the right-hand clause are the cores that benefit from this optimization. |
524 |
+-# |
525 |
+ config X86_P6_NOP |
526 |
+- def_bool y |
527 |
+- depends on X86_64 |
528 |
+- depends on (MCORE2 || MPENTIUM4 || MPSC) |
529 |
++ default n |
530 |
++ bool "Support for P6_NOPs on Intel chips" |
531 |
++ depends on (MCORE2 || MPENTIUM4 || MPSC || MATOM || MNEHALEM || MWESTMERE || MSILVERMONT || MGOLDMONT || MGOLDMONTPLUS || MSANDYBRIDGE || MIVYBRIDGE || MHASWELL || MBROADWELL || MSKYLAKE || MSKYLAKEX || MCANNONLAKE || MICELAKE || MCASCADELAKE || MNATIVE) |
532 |
++ ---help--- |
533 |
++ P6_NOPs are a relatively minor optimization that require a family >= |
534 |
++ 6 processor, except that it is broken on certain VIA chips. |
535 |
++ Furthermore, AMD chips prefer a totally different sequence of NOPs |
536 |
++ (which work on all CPUs). In addition, it looks like Virtual PC |
537 |
++ does not understand them. |
538 |
++ |
539 |
++ As a result, disallow these if we're not compiling for X86_64 (these |
540 |
++ NOPs do work on all x86-64 capable chips); the list of processors in |
541 |
++ the right-hand clause are the cores that benefit from this optimization. |
542 |
++ |
543 |
++ Say Y if you have Intel CPU newer than Pentium Pro, N otherwise. |
544 |
+ |
545 |
+ config X86_TSC |
546 |
+ def_bool y |
547 |
+- 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 |
548 |
++ 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 |
549 |
+ |
550 |
+ config X86_CMPXCHG64 |
551 |
+ def_bool y |
552 |
+@@ -367,7 +590,7 @@ config X86_CMPXCHG64 |
553 |
+ # generates cmov. |
554 |
+ config X86_CMOV |
555 |
+ def_bool y |
556 |
+- depends on (MK8 || MK7 || MCORE2 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MVIAC3_2 || MVIAC7 || MCRUSOE || MEFFICEON || X86_64 || MATOM || MGEODE_LX) |
557 |
++ 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) |
558 |
+ |
559 |
+ config X86_MINIMUM_CPU_FAMILY |
560 |
+ int |
561 |
+--- a/arch/x86/Makefile 2019-08-16 04:11:12.000000000 -0400 |
562 |
++++ b/arch/x86/Makefile 2019-08-22 16:01:22.559789904 -0400 |
563 |
+@@ -118,13 +118,53 @@ else |
564 |
+ KBUILD_CFLAGS += $(call cc-option,-mskip-rax-setup) |
565 |
+ |
566 |
+ # FIXME - should be integrated in Makefile.cpu (Makefile_32.cpu) |
567 |
++ cflags-$(CONFIG_MNATIVE) += $(call cc-option,-march=native) |
568 |
+ cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8) |
569 |
++ cflags-$(CONFIG_MK8SSE3) += $(call cc-option,-march=k8-sse3,-mtune=k8) |
570 |
++ cflags-$(CONFIG_MK10) += $(call cc-option,-march=amdfam10) |
571 |
++ cflags-$(CONFIG_MBARCELONA) += $(call cc-option,-march=barcelona) |
572 |
++ cflags-$(CONFIG_MBOBCAT) += $(call cc-option,-march=btver1) |
573 |
++ cflags-$(CONFIG_MJAGUAR) += $(call cc-option,-march=btver2) |
574 |
++ cflags-$(CONFIG_MBULLDOZER) += $(call cc-option,-march=bdver1) |
575 |
++ cflags-$(CONFIG_MPILEDRIVER) += $(call cc-option,-march=bdver2) |
576 |
++ cflags-$(CONFIG_MSTEAMROLLER) += $(call cc-option,-march=bdver3) |
577 |
++ cflags-$(CONFIG_MEXCAVATOR) += $(call cc-option,-march=bdver4) |
578 |
++ cflags-$(CONFIG_MZEN) += $(call cc-option,-march=znver1) |
579 |
++ cflags-$(CONFIG_MZEN2) += $(call cc-option,-march=znver2) |
580 |
+ cflags-$(CONFIG_MPSC) += $(call cc-option,-march=nocona) |
581 |
+ |
582 |
+ cflags-$(CONFIG_MCORE2) += \ |
583 |
+- $(call cc-option,-march=core2,$(call cc-option,-mtune=generic)) |
584 |
+- cflags-$(CONFIG_MATOM) += $(call cc-option,-march=atom) \ |
585 |
+- $(call cc-option,-mtune=atom,$(call cc-option,-mtune=generic)) |
586 |
++ $(call cc-option,-march=core2,$(call cc-option,-mtune=core2)) |
587 |
++ cflags-$(CONFIG_MNEHALEM) += \ |
588 |
++ $(call cc-option,-march=nehalem,$(call cc-option,-mtune=nehalem)) |
589 |
++ cflags-$(CONFIG_MWESTMERE) += \ |
590 |
++ $(call cc-option,-march=westmere,$(call cc-option,-mtune=westmere)) |
591 |
++ cflags-$(CONFIG_MSILVERMONT) += \ |
592 |
++ $(call cc-option,-march=silvermont,$(call cc-option,-mtune=silvermont)) |
593 |
++ cflags-$(CONFIG_MGOLDMONT) += \ |
594 |
++ $(call cc-option,-march=goldmont,$(call cc-option,-mtune=goldmont)) |
595 |
++ cflags-$(CONFIG_MGOLDMONTPLUS) += \ |
596 |
++ $(call cc-option,-march=goldmont-plus,$(call cc-option,-mtune=goldmont-plus)) |
597 |
++ cflags-$(CONFIG_MSANDYBRIDGE) += \ |
598 |
++ $(call cc-option,-march=sandybridge,$(call cc-option,-mtune=sandybridge)) |
599 |
++ cflags-$(CONFIG_MIVYBRIDGE) += \ |
600 |
++ $(call cc-option,-march=ivybridge,$(call cc-option,-mtune=ivybridge)) |
601 |
++ cflags-$(CONFIG_MHASWELL) += \ |
602 |
++ $(call cc-option,-march=haswell,$(call cc-option,-mtune=haswell)) |
603 |
++ cflags-$(CONFIG_MBROADWELL) += \ |
604 |
++ $(call cc-option,-march=broadwell,$(call cc-option,-mtune=broadwell)) |
605 |
++ cflags-$(CONFIG_MSKYLAKE) += \ |
606 |
++ $(call cc-option,-march=skylake,$(call cc-option,-mtune=skylake)) |
607 |
++ cflags-$(CONFIG_MSKYLAKEX) += \ |
608 |
++ $(call cc-option,-march=skylake-avx512,$(call cc-option,-mtune=skylake-avx512)) |
609 |
++ cflags-$(CONFIG_MCANNONLAKE) += \ |
610 |
++ $(call cc-option,-march=cannonlake,$(call cc-option,-mtune=cannonlake)) |
611 |
++ cflags-$(CONFIG_MICELAKE) += \ |
612 |
++ $(call cc-option,-march=icelake-client,$(call cc-option,-mtune=icelake-client)) |
613 |
++ cflags-$(CONFIG_MCASCADE) += \ |
614 |
++ $(call cc-option,-march=cascadelake,$(call cc-option,-mtune=cascadelake)) |
615 |
++ cflags-$(CONFIG_MATOM) += $(call cc-option,-march=bonnell) \ |
616 |
++ $(call cc-option,-mtune=bonnell,$(call cc-option,-mtune=generic)) |
617 |
+ cflags-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=generic) |
618 |
+ KBUILD_CFLAGS += $(cflags-y) |
619 |
+ |
620 |
+--- a/arch/x86/Makefile_32.cpu 2019-08-16 04:11:12.000000000 -0400 |
621 |
++++ b/arch/x86/Makefile_32.cpu 2019-08-22 16:02:14.687701216 -0400 |
622 |
+@@ -23,7 +23,19 @@ cflags-$(CONFIG_MK6) += -march=k6 |
623 |
+ # Please note, that patches that add -march=athlon-xp and friends are pointless. |
624 |
+ # They make zero difference whatsosever to performance at this time. |
625 |
+ cflags-$(CONFIG_MK7) += -march=athlon |
626 |
++cflags-$(CONFIG_MNATIVE) += $(call cc-option,-march=native) |
627 |
+ cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8,-march=athlon) |
628 |
++cflags-$(CONFIG_MK8SSE3) += $(call cc-option,-march=k8-sse3,-march=athlon) |
629 |
++cflags-$(CONFIG_MK10) += $(call cc-option,-march=amdfam10,-march=athlon) |
630 |
++cflags-$(CONFIG_MBARCELONA) += $(call cc-option,-march=barcelona,-march=athlon) |
631 |
++cflags-$(CONFIG_MBOBCAT) += $(call cc-option,-march=btver1,-march=athlon) |
632 |
++cflags-$(CONFIG_MJAGUAR) += $(call cc-option,-march=btver2,-march=athlon) |
633 |
++cflags-$(CONFIG_MBULLDOZER) += $(call cc-option,-march=bdver1,-march=athlon) |
634 |
++cflags-$(CONFIG_MPILEDRIVER) += $(call cc-option,-march=bdver2,-march=athlon) |
635 |
++cflags-$(CONFIG_MSTEAMROLLER) += $(call cc-option,-march=bdver3,-march=athlon) |
636 |
++cflags-$(CONFIG_MEXCAVATOR) += $(call cc-option,-march=bdver4,-march=athlon) |
637 |
++cflags-$(CONFIG_MZEN) += $(call cc-option,-march=znver1,-march=athlon) |
638 |
++cflags-$(CONFIG_MZEN2) += $(call cc-option,-march=znver2,-march=athlon) |
639 |
+ cflags-$(CONFIG_MCRUSOE) += -march=i686 -falign-functions=0 -falign-jumps=0 -falign-loops=0 |
640 |
+ cflags-$(CONFIG_MEFFICEON) += -march=i686 $(call tune,pentium3) -falign-functions=0 -falign-jumps=0 -falign-loops=0 |
641 |
+ cflags-$(CONFIG_MWINCHIPC6) += $(call cc-option,-march=winchip-c6,-march=i586) |
642 |
+@@ -32,8 +44,22 @@ cflags-$(CONFIG_MCYRIXIII) += $(call cc- |
643 |
+ cflags-$(CONFIG_MVIAC3_2) += $(call cc-option,-march=c3-2,-march=i686) |
644 |
+ cflags-$(CONFIG_MVIAC7) += -march=i686 |
645 |
+ cflags-$(CONFIG_MCORE2) += -march=i686 $(call tune,core2) |
646 |
+-cflags-$(CONFIG_MATOM) += $(call cc-option,-march=atom,$(call cc-option,-march=core2,-march=i686)) \ |
647 |
+- $(call cc-option,-mtune=atom,$(call cc-option,-mtune=generic)) |
648 |
++cflags-$(CONFIG_MNEHALEM) += -march=i686 $(call tune,nehalem) |
649 |
++cflags-$(CONFIG_MWESTMERE) += -march=i686 $(call tune,westmere) |
650 |
++cflags-$(CONFIG_MSILVERMONT) += -march=i686 $(call tune,silvermont) |
651 |
++cflags-$(CONFIG_MGOLDMONT) += -march=i686 $(call tune,goldmont) |
652 |
++cflags-$(CONFIG_MGOLDMONTPLUS) += -march=i686 $(call tune,goldmont-plus) |
653 |
++cflags-$(CONFIG_MSANDYBRIDGE) += -march=i686 $(call tune,sandybridge) |
654 |
++cflags-$(CONFIG_MIVYBRIDGE) += -march=i686 $(call tune,ivybridge) |
655 |
++cflags-$(CONFIG_MHASWELL) += -march=i686 $(call tune,haswell) |
656 |
++cflags-$(CONFIG_MBROADWELL) += -march=i686 $(call tune,broadwell) |
657 |
++cflags-$(CONFIG_MSKYLAKE) += -march=i686 $(call tune,skylake) |
658 |
++cflags-$(CONFIG_MSKYLAKEX) += -march=i686 $(call tune,skylake-avx512) |
659 |
++cflags-$(CONFIG_MCANNONLAKE) += -march=i686 $(call tune,cannonlake) |
660 |
++cflags-$(CONFIG_MICELAKE) += -march=i686 $(call tune,icelake-client) |
661 |
++cflags-$(CONFIG_MCASCADELAKE) += -march=i686 $(call tune,cascadelake) |
662 |
++cflags-$(CONFIG_MATOM) += $(call cc-option,-march=bonnell,$(call cc-option,-march=core2,-march=i686)) \ |
663 |
++ $(call cc-option,-mtune=bonnell,$(call cc-option,-mtune=generic)) |
664 |
+ |
665 |
+ # AMD Elan support |
666 |
+ cflags-$(CONFIG_MELAN) += -march=i486 |