[2.6 patch] better i386 and amd64 cpu selection

From: Adrian Bunk
Date: Sun Jun 06 2004 - 07:44:09 EST



This patch changes the way the CPUs are selected from the current
"select a reasonable setting that supports all your CPUs, and for
further optimizations for more than one CPU type you might also want to
enable X86_GENERIC" to "select all CPUs your kernel should support"
which is a better understandable semantics for users (= people
configuring a kernel).

As a side effect, further optimizations are possible based on this
patch, but they are _not_ included.

It's now updated for 2.6.7-rc2.

This patch was too late for 2.6, but I'll try to resubmit once 2.7
opens.

Changes:

- changed the CPU selection from a choice to single options for
every cpu
- X86_GENERIC is no longer required
- renamed the M* variables to CPU_*, this is needed to ask the users
upgrading from older kernels instead of silently changing the
semantics
- X86_GOOD_APIC -> X86_BAD_APIC
- help text changes/updates

TODO:
- module versioning


The main effect is that this patch makes it easier for people who configure
kernels that should work on different CPU types. A user (= person compiling
his own kernel) does no longer need any deeper knowledge when e.g.
configuring a kernel that should run on both an Athlon and a Pentium 4 - he
simply selects all CPUs he wants to support in his kernel.

As a side effect, this patch allows further optimizations based on the fact
that e.g. a kernel for an i386 no longer needs to support an Athlon which
can be used to omit support for non-selected CPUs. For exampler there is no
need to include arch/i386/kernel/cpu/amd.c in your kernel if the kernel
should only run on a 386; I made two such example patches that are _way_ too
ugly for merging but show that this CPU selection scheme makes some more
space savings possible




--- 25/arch/i386/lib/mmx.c~better-i386-cpu-selection 2004-01-22 23:09:50.000000000 -0800
+++ 25-akpm/arch/i386/lib/mmx.c 2004-01-22 23:09:50.000000000 -0800
@@ -121,7 +121,7 @@ void *_mmx_memcpy(void *to, const void *
return p;
}

-#ifdef CONFIG_MK7
+#ifdef CONFIG_CPU_ONLY_K7

/*
* The K7 has streaming cache bypass load/store. The Cyrix III, K6 and
--- 25/include/asm-i386/apic.h~better-i386-cpu-selection 2004-01-22 23:09:50.000000000 -0800
+++ 25-akpm/include/asm-i386/apic.h 2004-01-22 23:09:50.000000000 -0800
@@ -41,7 +41,7 @@ static __inline__ void apic_wait_icr_idl
do { } while ( apic_read( APIC_ICR ) & APIC_ICR_BUSY );
}

-#ifdef CONFIG_X86_GOOD_APIC
+#ifndef CONFIG_X86_BAD_APIC
# define FORCE_READ_AROUND_WRITE 0
# define apic_read_around(x)
# define apic_write_around(x,y) apic_write((x),(y))
@@ -56,7 +56,7 @@ static inline void ack_APIC_irq(void)
/*
* ack_APIC_irq() actually gets compiled as a single instruction:
* - a single rmw on Pentium/82489DX
- * - a single write on P6+ cores (CONFIG_X86_GOOD_APIC)
+ * - a single write on P6+ cores (!CONFIG_X86_BAD_APIC)
* ... yummie.
*/

--- 25/include/asm-x86_64/apic.h~better-i386-cpu-selection 2004-01-22 23:09:50.000000000 -0800
+++ 25-akpm/include/asm-x86_64/apic.h 2004-01-22 23:09:50.000000000 -0800
@@ -52,7 +52,7 @@ static inline void ack_APIC_irq(void)
/*
* ack_APIC_irq() actually gets compiled as a single instruction:
* - a single rmw on Pentium/82489DX
- * - a single write on P6+ cores (CONFIG_X86_GOOD_APIC)
+ * - a single write on P6+ cores (!CONFIG_X86_BAD_APIC)
* ... yummie.
*/


_
--- linux-2.6.6/arch/i386/mach-voyager/voyager_smp.c.old 2004-05-17 01:45:56.000000000 +0200
+++ linux-2.6.6/arch/i386/mach-voyager/voyager_smp.c 2004-05-17 01:46:00.000000000 +0200
@@ -553,7 +553,7 @@

/* For the 486, we can't use the 4Mb page table trick, so
* must map a region of memory */
-#ifdef CONFIG_M486
+#ifdef CONFIG_CPU_486
int i;
unsigned long *page_table_copies = (unsigned long *)
__get_free_page(GFP_KERNEL);
@@ -610,7 +610,7 @@
/* set the original swapper_pg_dir[0] to map 0 to 4Mb transparently
* (so that the booting CPU can find start_32 */
orig_swapper_pg_dir0 = swapper_pg_dir[0];
-#ifdef CONFIG_M486
+#ifdef CONFIG_CPU_486
if(page_table_copies == NULL)
panic("No free memory for 486 page tables\n");
for(i = 0; i < PAGE_SIZE/sizeof(unsigned long); i++)
@@ -669,7 +669,7 @@
/* reset the page table */
swapper_pg_dir[0] = orig_swapper_pg_dir0;
local_flush_tlb();
-#ifdef CONFIG_M486
+#ifdef CONFIG_CPU_486
free_page((unsigned long)page_table_copies);
#endif

--- linux-2.6.6/arch/i386/Makefile.old 2004-05-17 01:45:56.000000000 +0200
+++ linux-2.6.6/arch/i386/Makefile 2004-05-17 01:46:00.000000000 +0200
@@ -26,30 +26,47 @@

align := $(subst -functions=0,,$(call check_gcc,-falign-functions=0,-malign-functions=0))

-cflags-$(CONFIG_M386) += -march=i386
-cflags-$(CONFIG_M486) += -march=i486
-cflags-$(CONFIG_M586) += -march=i586
-cflags-$(CONFIG_M586TSC) += -march=i586
-cflags-$(CONFIG_M586MMX) += $(call check_gcc,-march=pentium-mmx,-march=i586)
-cflags-$(CONFIG_M686) += -march=i686
-cflags-$(CONFIG_MPENTIUMII) += $(call check_gcc,-march=pentium2,-march=i686)
-cflags-$(CONFIG_MPENTIUMIII) += $(call check_gcc,-march=pentium3,-march=i686)
-cflags-$(CONFIG_MPENTIUMM) += $(call check_gcc,-march=pentium3,-march=i686)
-cflags-$(CONFIG_MPENTIUM4) += $(call check_gcc,-march=pentium4,-march=i686)
-cflags-$(CONFIG_MK6) += -march=k6
+cflags-$(CONFIG_CPU_PENTIUM4) := $(call check_gcc,-march=pentium4,-march=i686)
+
+ifdef CONFIG_CPU_PENTIUM4
+ cflags-$(CONFIG_CPU_K8) := $(call check_gcc,-march=pentium3,-march=i686)
+else
+ cflags-$(CONFIG_CPU_K8) := $(call check_gcc,-march=k8,$(call check_gcc,-march=athlon,-march=i686 $(align)-functions=4))
+endif
+
# Please note, that patches that add -march=athlon-xp and friends are pointless.
# They make zero difference whatsosever to performance at this time.
-cflags-$(CONFIG_MK7) += $(call check_gcc,-march=athlon,-march=i686 $(align)-functions=4)
-cflags-$(CONFIG_MK8) += $(call check_gcc,-march=k8,$(call check_gcc,-march=athlon,-march=i686 $(align)-functions=4))
-cflags-$(CONFIG_MCRUSOE) += -march=i686 $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0
-cflags-$(CONFIG_MWINCHIPC6) += $(call check_gcc,-march=winchip-c6,-march=i586)
-cflags-$(CONFIG_MWINCHIP2) += $(call check_gcc,-march=winchip2,-march=i586)
-cflags-$(CONFIG_MWINCHIP3D) += $(call check_gcc,-march=winchip2,-march=i586)
-cflags-$(CONFIG_MCYRIXIII) += $(call check_gcc,-march=c3,-march=i486) $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0
-cflags-$(CONFIG_MVIAC3_2) += $(call check_gcc,-march=c3-2,-march=i686)
+ifdef CONFIG_CPU_PENTIUM4
+ cflags-$(CONFIG_CPU_K7) := $(call check_gcc,-march=pentium3,-march=i686)
+else
+ cflags-$(CONFIG_CPU_K7) := $(call check_gcc,-march=athlon,-march=i686 $(align)-functions=4)
+endif
+
+cflags-$(CONFIG_CPU_PENTIUMM) := $(call check_gcc,-march=pentium3,-march=i686)
+cflags-$(CONFIG_CPU_PENTIUMIII) := $(call check_gcc,-march=pentium3,-march=i686)
+cflags-$(CONFIG_CPU_PENTIUMII) := $(call check_gcc,-march=pentium2,-march=i686)
+cflags-$(CONFIG_CPU_VIAC3_2) := $(call check_gcc,-march=c3-2,-march=i686)
+cflags-$(CONFIG_CPU_CRUSOE) := -march=i686 $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0
+cflags-$(CONFIG_CPU_686) := -march=i686
+
+# supports i686 without cmov
+cflags-$(CONFIG_CPU_CYRIXIII) := $(call check_gcc,-march=c3,-march=i486) $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0
+
+cflags-$(CONFIG_CPU_K6) := -march=k6
+cflags-$(CONFIG_CPU_586MMX) := $(call check_gcc,-march=pentium-mmx,-march=i586)
+
+# Winchip supports i586
+cflags-$(CONFIG_CPU_WINCHIPC6) := $(call check_gcc,-march=winchip-c6,-march=i486)
+cflags-$(CONFIG_CPU_WINCHIP2) := $(call check_gcc,-march=winchip2,-march=i486)
+cflags-$(CONFIG_CPU_WINCHIP3D) := $(call check_gcc,-march=winchip2,-march=i486)
+
+cflags-$(CONFIG_CPU_586TSC) := -march=i586
+cflags-$(CONFIG_CPU_586) := -march=i586
+cflags-$(CONFIG_CPU_486) := -march=i486
+cflags-$(CONFIG_CPU_386) := -march=i386

# AMD Elan support
-cflags-$(CONFIG_X86_ELAN) += -march=i486
+cflags-$(CONFIG_X86_ELAN) := -march=i486

# -mregparm=3 works ok on gcc-3.0 and later
#
--- linux-2.6.6/drivers/serial/8250.h.old 2004-05-17 01:45:56.000000000 +0200
+++ linux-2.6.6/drivers/serial/8250.h 2004-05-17 01:46:00.000000000 +0200
@@ -35,7 +35,7 @@

#undef SERIAL_DEBUG_PCI

-#if defined(__i386__) && (defined(CONFIG_M386) || defined(CONFIG_M486))
+#if defined(__i386__) && (defined(CONFIG_CPU_386) || defined(CONFIG_CPU_486))
#define SERIAL_INLINE
#endif

--- linux-2.6.6/include/asm-i386/bugs.h.old 2004-05-17 01:45:56.000000000 +0200
+++ linux-2.6.6/include/asm-i386/bugs.h 2004-05-17 01:46:00.000000000 +0200
@@ -152,9 +152,8 @@
* - In order to run on anything without a TSC, we need to be
* compiled for a i486.
* - In order to support the local APIC on a buggy Pentium machine,
- * we need to be compiled with CONFIG_X86_GOOD_APIC disabled,
- * which happens implicitly if compiled for a Pentium or lower
- * (unless an advanced selection of CPU features is used) as an
+ * we need to be compiled with CONFIG_X86_BAD_APIC enabled,
+ * which happens implicitly if compiled for a Pentium as an
* otherwise config implies a properly working local APIC without
* the need to do extra reads from the APIC.
*/
@@ -185,7 +184,7 @@
* integrated APIC (see 11AP erratum in "Pentium Processor
* Specification Update").
*/
-#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_GOOD_APIC)
+#if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_BAD_APIC)
if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL
&& cpu_has_apic
&& boot_cpu_data.x86 == 5
--- linux-2.6.6/include/asm-i386/module.h.old 2004-05-17 01:45:56.000000000 +0200
+++ linux-2.6.6/include/asm-i386/module.h 2004-05-17 01:46:00.000000000 +0200
@@ -51,7 +51,7 @@
#elif defined CONFIG_MVIAC3_2
#define MODULE_PROC_FAMILY "VIAC3-2 "
#else
-#error unknown processor family
+#define MODULE_PROC_FAMILY "this needs to be fixed"
#endif

#ifdef CONFIG_REGPARM
--- linux-2.6.7-rc2/include/asm-i386/processor.h.old 2004-06-06 12:03:38.000000000 +0200
+++ linux-2.6.7-rc2/include/asm-i386/processor.h 2004-06-06 12:08:48.000000000 +0200
@@ -587,7 +587,7 @@
#define K7_NOP7 ".byte 0x8D,0x04,0x05,0,0,0,0\n"
#define K7_NOP8 K7_NOP7 ASM_NOP1

-#ifdef CONFIG_MK8
+#ifdef CONFIG_CPU_ONLY_K8
#define ASM_NOP1 K8_NOP1
#define ASM_NOP2 K8_NOP2
#define ASM_NOP3 K8_NOP3
@@ -596,7 +596,7 @@
#define ASM_NOP6 K8_NOP6
#define ASM_NOP7 K8_NOP7
#define ASM_NOP8 K8_NOP8
-#elif defined(CONFIG_MK7)
+#elif defined(CONFIG_CPU_ONLY_K7)
#define ASM_NOP1 K7_NOP1
#define ASM_NOP2 K7_NOP2
#define ASM_NOP3 K7_NOP3
--- linux-2.6.7-rc2/arch/i386/Kconfig.old 2004-06-06 12:03:47.000000000 +0200
+++ linux-2.6.7-rc2/arch/i386/Kconfig 2004-06-06 12:08:48.000000000 +0200
@@ -137,289 +137,267 @@
config ES7000_CLUSTERED_APIC
bool
default y
- depends on SMP && X86_ES7000 && MPENTIUMIII
+ depends on SMP && X86_ES7000 && CPU_PENTIUMIII

if !X86_ELAN

-choice
- prompt "Processor family"
- default M686
+menu "Processor support"

-config M386
- bool "386"
- ---help---
- This is the processor type of your CPU. This information is used for
- optimizing purposes. In order to compile a kernel that can run on
- all x86 CPU types (albeit not optimally fast), you can specify
- "386" here.
-
- The kernel will not necessarily run on earlier architectures than
- the one you have chosen, e.g. a Pentium optimized kernel will run on
- a PPro, but not necessarily on a i486.
-
- Here are the settings recommended for greatest speed:
- - "386" for the AMD/Cyrix/Intel 386DX/DXL/SL/SLC/SX, Cyrix/TI
- 486DLC/DLC2, UMC 486SX-S and NexGen Nx586. Only "386" kernels
- will run on a 386 class machine.
- - "486" for the AMD/Cyrix/IBM/Intel 486DX/DX2/DX4 or
- SL/SLC/SLC2/SLC3/SX/SX2 and UMC U5D or U5S.
- - "586" for generic Pentium CPUs lacking the TSC
- (time stamp counter) register.
- - "Pentium-Classic" for the Intel Pentium.
- - "Pentium-MMX" for the Intel Pentium MMX.
- - "Pentium-Pro" for the Intel Pentium Pro.
- - "Pentium-II" for the Intel Pentium II or pre-Coppermine Celeron.
- - "Pentium-III" for the Intel Pentium III or Coppermine Celeron.
- - "Pentium-4" for the Intel Pentium 4 or P4-based Celeron.
- - "K6" for the AMD K6, K6-II and K6-III (aka K6-3D).
- - "Athlon" for the AMD K7 family (Athlon/Duron/Thunderbird).
- - "Crusoe" for the Transmeta Crusoe series.
- - "Winchip-C6" for original IDT Winchip.
- - "Winchip-2" for IDT Winchip 2.
- - "Winchip-2A" for IDT Winchips with 3dNow! capabilities.
- - "CyrixIII/VIA C3" for VIA Cyrix III or VIA C3.
- - "VIA C3-2 for VIA C3-2 "Nehemiah" (model 9 and above).
+comment "Select all processors your kernel should support"

- If you don't know what to do, choose "386".
+config CPU_386
+ bool "386"
+ default n
+ help
+ Select this for a 386 series processor.

-config M486
+config CPU_486
bool "486"
+ default y
help
Select this for a 486 series processor, either Intel or one of the
compatible processors from AMD, Cyrix, IBM, or Intel. Includes DX,
DX2, and DX4 variants; also SL/SLC/SLC2/SLC3/SX/SX2 and UMC U5D or
U5S.

-config M586
+config CPU_586
bool "586/K5/5x86/6x86/6x86MX"
+ default y
help
- Select this for an 586 or 686 series processor such as the AMD K5,
- the Intel 5x86 or 6x86, or the Intel 6x86MX. This choice does not
- assume the RDTSC (Read Time Stamp Counter) instruction.
+ Select this for a non-Intel 586 or 686 series processor such as
+ the AMD K5 or the Cyrix 6x86MX.
+
+ Several CPUs that have their own options below (e.g. AMD K6,
+ Duron, Athlon and Opteeron, IDT Winchip, Cyrix III and
+ VIA C3) do _not_ need this option.

-config M586TSC
+ This choice does not assume the RDTSC (Read Time Stamp Counter)
+ instruction.
+
+config CPU_586TSC
bool "Pentium-Classic"
+ default y
help
Select this for a Pentium Classic processor with the RDTSC (Read
- Time Stamp Counter) instruction for benchmarking.
+ Time Stamp Counter) instruction.

-config M586MMX
+config CPU_586MMX
bool "Pentium-MMX"
+ default y
help
Select this for a Pentium with the MMX graphics/multimedia
extended instructions.

-config M686
+config CPU_686
bool "Pentium-Pro"
+ default y
help
- Select this for Intel Pentium Pro chips. This enables the use of
- Pentium Pro extended instructions, and disables the init-time guard
- against the f00f bug found in earlier Pentiums.
+ Select this for Intel Pentium Pro chips.

-config MPENTIUMII
+config CPU_PENTIUMII
bool "Pentium-II/Celeron(pre-Coppermine)"
+ default y
help
Select this for Intel chips based on the Pentium-II and
- pre-Coppermine Celeron core. This option enables an unaligned
- copy optimization, compiles the kernel with optimization flags
- tailored for the chip, and applies any applicable Pentium Pro
- optimizations.
+ pre-Coppermine Celeron core.

-config MPENTIUMIII
+config CPU_PENTIUMIII
bool "Pentium-III/Celeron(Coppermine)/Pentium-III Xeon"
+ default y
help
Select this for Intel chips based on the Pentium-III and
- Celeron-Coppermine core. This option enables use of some
- extended prefetch instructions in addition to the Pentium II
- extensions.
+ Celeron-Coppermine core.

-config MPENTIUMM
+config CPU_PENTIUMM
bool "Pentium M"
+ default y
help
Select this for Intel Pentium M (not Pentium-4 M)
notebook chips.

-config MPENTIUM4
+config CPU_PENTIUM4
bool "Pentium-4/Celeron(P4-based)/Pentium-4 M/Xeon"
+ default y
help
- Select this for Intel Pentium 4 chips. This includes the
- Pentium 4, P4-based Celeron and Xeon, and Pentium-4 M
- (not Pentium M) chips. This option enables compile flags
- optimized for the chip, uses the correct cache shift, and
- applies any applicable Pentium III optimizations.
+ Select this for Intel Pentium 4 chips. This includes
+ the Pentium 4, P4-based Celeron and Xeon, and
+ Pentium-4 M (not Pentium M) chips.

-config MK6
+config CPU_K6
bool "K6/K6-II/K6-III"
+ default y
help
- Select this for an AMD K6-family processor. Enables use of
- some extended instructions, and passes appropriate optimization
- flags to GCC.
+ Select this for an AMD K6, K6-II or K6-III (aka K6-3D).

-config MK7
+config CPU_K7
bool "Athlon/Duron/K7"
+ default y
help
- Select this for an AMD Athlon K7-family processor. Enables use of
- some extended instructions, and passes appropriate optimization
- flags to GCC.
+ Select this for an AMD Athlon K7-family processor.

-config MK8
+config CPU_K8
bool "Opteron/Athlon64/Hammer/K8"
+ default y
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.
+ Select this for an AMD Opteron or Athlon64 Hammer-family processor.

-config MCRUSOE
+config CPU_CRUSOE
bool "Crusoe"
+ default y
help
- Select this for a Transmeta Crusoe processor. Treats the processor
- like a 586 with TSC, and sets some GCC optimization flags (like a
- Pentium Pro with no alignment requirements).
+ Select this for a Transmeta Crusoe processor.

-config MWINCHIPC6
+config CPU_WINCHIPC6
bool "Winchip-C6"
+ default y
help
- Select this for an IDT Winchip C6 chip. Linux and GCC
- treat this chip as a 586TSC with some extended instructions
- and alignment requirements.
+ Select this for an IDT Winchip C6 chip.

-config MWINCHIP2
+config CPU_WINCHIP2
bool "Winchip-2"
+ default y
help
- Select this for an IDT Winchip-2. Linux and GCC
- treat this chip as a 586TSC with some extended instructions
- and alignment requirements.
+ Select this for an IDT Winchip-2.

-config MWINCHIP3D
+config CPU_WINCHIP3D
bool "Winchip-2A/Winchip-3"
+ default y
help
- Select this for an IDT Winchip-2A or 3. Linux and GCC
- treat this chip as a 586TSC with some extended instructions
- and alignment reqirements. Also enable out of order memory
- stores for this CPU, which can increase performance of some
- operations.
+ Select this for an IDT Winchip-2A or 3 with 3dNow!
+ capabilities.

-config MCYRIXIII
+config CPU_CYRIXIII
bool "CyrixIII/VIA-C3"
+ default y
help
- Select this for a Cyrix III or C3 chip. Presently Linux and GCC
- treat this chip as a generic 586. Whilst the CPU is 686 class,
- it lacks the cmov extension which gcc assumes is present when
- generating 686 code.
- Note that Nehemiah (Model 9) and above will not boot with this
- kernel due to them lacking the 3DNow! instructions used in earlier
- incarnations of the CPU.
+ Select this for a Cyrix III or VIA C3 chip.

-config MVIAC3_2
+config CPU_VIAC3_2
bool "VIA C3-2 (Nehemiah)"
+ default y
help
- Select this for a VIA C3 "Nehemiah". Selecting this enables usage
- of SSE and tells gcc to treat the CPU as a 686.
- Note, this kernel will not boot on older (pre model 9) C3s.
+ Select this for a VIA C3 "Nehemiah" (model 9 and above).

-endchoice
+endmenu

-config X86_GENERIC
- bool "Generic x86 support"
- help
- Instead of just including optimizations for the selected
- x86 variant (e.g. PII, Crusoe or Athlon), include some more
- generic optimizations as well. This will make the kernel
- perform better on x86 CPUs other than that selected.
+endif

- This is really intended for distributors who need more
- generic optimizations.
+#
+# helper options
+#
+config CPU_INTEL
+ bool
+ depends on CPU_386 || CPU_486 || CPU_586TSC || CPU_686 || CPU_PENTIUMII || CPU_PENTIUMIII || CPU_PENTIUMM || CPU_PENTIUM4
+ default y

-endif
+config CPU_WINCHIP
+ bool
+ depends on CPU_WINCHIPC6 || CPU_WINCHIP2 || CPU_WINCHIP3D
+ default y
+
+config CPU_ONLY_K7
+ bool
+ depends on CPU_K7 && !CPU_INTEL && !CPU_K6 && !CPU_K8 && !X86_ELAN && !CPU_CRUSOE && !CPU_WINCHIP && !CPU_CYRIXIII && !CPU_VIAC3_2
+ default y
+
+config CPU_ONLY_K8
+ bool
+ depends on CPU_K8 && !CPU_INTEL && !CPU_K6 && !CPU_K7 && !X86_ELAN && !CPU_CRUSOE && !CPU_WINCHIP && !CPU_CYRIXIII && !CPU_VIAC3_2
+ default y
+
+config CPU_ONLY_WINCHIP
+ bool
+ depends on CPU_WINCHIP && !CPU_INTEL && !CPU_K6 && !CPU_K7 && !CPU_K8 && !X86_ELAN && !CPU_CRUSOE && !CPU_CYRIXIII && !CPU_VIAC3_2
+ default y

#
# Define implied options from the CPU selection here
#
config X86_CMPXCHG
bool
- depends on !M386
+ depends on !CPU_386
default y

config X86_XADD
bool
- depends on !M386
+ depends on !CPU_386
default y

config X86_L1_CACHE_SHIFT
int
- default "7" if MPENTIUM4 || X86_GENERIC
- default "4" if X86_ELAN || M486 || M386
- default "5" if MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCRUSOE || MCYRIXIII || MK6 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || M586 || MVIAC3_2
- default "6" if MK7 || MK8 || MPENTIUMM
+ default "7" if CPU_PENTIUM4
+ default "6" if CPU_K7 || CPU_K8 || CPU_PENTIUMM
+ default "5" if CPU_WINCHIP || CPU_CRUSOE || CPU_CYRIXIII || CPU_K6 || CPU_PENTIUMIII || CPU_PENTIUMII || CPU_686 || CPU_586MMX || CPU_586TSC || CPU_586 || CPU_VIAC3_2
+ default "4" if X86_ELAN || CPU_486 || CPU_386

config RWSEM_GENERIC_SPINLOCK
bool
- depends on M386
+ depends on CPU_386
default y

config RWSEM_XCHGADD_ALGORITHM
bool
- depends on !M386
+ depends on !CPU_386
default y

config X86_PPRO_FENCE
bool
- depends on M686 || M586MMX || M586TSC || M586 || M486 || M386
+ depends on CPU_686
default y

config X86_F00F_BUG
bool
- depends on M586MMX || M586TSC || M586 || M486 || M386
+ depends on CPU_586MMX || CPU_586TSC
default y

config X86_WP_WORKS_OK
bool
- depends on !M386
+ depends on !CPU_386
default y

config X86_INVLPG
bool
- depends on !M386
+ depends on !CPU_386
default y

config X86_BSWAP
bool
- depends on !M386
+ depends on !CPU_386
default y

config X86_POPAD_OK
bool
- depends on !M386
+ depends on !CPU_386
default y

config X86_ALIGNMENT_16
bool
- depends on MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCYRIXIII || X86_ELAN || MK6 || M586MMX || M586TSC || M586 || M486 || MVIAC3_2
+ depends on CPU_WINCHIP || CPU_CYRIXIII || X86_ELAN || CPU_K6 || CPU_586MMX || CPU_586TSC || CPU_586 || CPU_486 || CPU_VIAC3_2
default y

-config X86_GOOD_APIC
+config X86_BAD_APIC
bool
- depends on MK7 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || MK8
+ depends on CPU_586TSC
default y

config X86_INTEL_USERCOPY
bool
- depends on MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M586MMX || X86_GENERIC || MK8 || MK7
+ depends on CPU_K7 || CPU_K8 || CPU_PENTIUMII || CPU_PENTIUMIII || CPU_PENTIUMM || CPU_PENTIUM4
default y

config X86_USE_PPRO_CHECKSUM
bool
- depends on MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MK8 || MVIAC3_2
+ depends on !CPU_386 && !CPU_486 && !CPU_586 && !CPU_586TSC && !CPU_586MMX && !X86_ELAN && !CPU_CRUSOE
default y

config X86_USE_3DNOW
bool
- depends on MCYRIXIII || MK7
+ depends on !CPU_INTEL && !CPU_K6 && !CPU_K8 && !X86_ELAN && !CPU_CRUSOE && !CPU_WINCHIP && !CPU_VIAC3_2
default y

config X86_OOSTORE
bool
- depends on (MWINCHIP3D || MWINCHIP2 || MWINCHIPC6) && MTRR
+ depends on CPU_ONLY_WINCHIP && MTRR
default y

config HPET_TIMER
@@ -543,7 +521,7 @@

config X86_TSC
bool
- depends on (MWINCHIP3D || MWINCHIP2 || MCRUSOE || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || MK8 || MVIAC3_2) && !X86_NUMAQ
+ depends on !X86_NUMAQ && !CPU_386 && !CPU_486 && !CPU_586 && !X86_ELAN && !CPU_WINCHIPC6
default y

config X86_MCE
--- linux-2.6.7-rc2/arch/x86_64/Kconfig.old 2004-06-06 12:11:14.000000000 +0200
+++ linux-2.6.7-rc2/arch/x86_64/Kconfig 2004-06-06 12:11:55.000000000 +0200
@@ -83,49 +83,43 @@

menu "Processor type and features"

-choice
- prompt "Processor family"
- default MK8
+menu "Processor support"

-config MK8
+comment "Select all processors your kernel should support"
+
+config CPU_K8
bool "AMD-Opteron/Athlon64"
+ default y
help
Optimize for AMD Opteron/Athlon64/Hammer/K8 CPUs.

-config MPSC
- bool "Intel x86-64"
- help
+config CPU_PSC
+ bool "Intel x86-64"
+ default y
+ help
Optimize for Intel IA32 with 64bit extension CPUs
(Prescott/Nocona/Potomac)

-config GENERIC_CPU
- bool "Generic-x86-64"
- help
- Generic x86-64 CPU.

-endchoice
+endmenu

#
# Define implied options from the CPU selection here
#
config X86_L1_CACHE_BYTES
int
- default "128" if GENERIC_CPU || MPSC
- default "64" if MK8
+ default "128" if CPU_PSC
+ default "64" if CPU_K8

config X86_L1_CACHE_SHIFT
int
- default "7" if GENERIC_CPU || MPSC
- default "6" if MK8
+ default "7" if CPU_PSC
+ default "6" if CPU_K8

config X86_TSC
bool
default y

-config X86_GOOD_APIC
- bool
- default y
-
config MICROCODE
tristate "/dev/cpu/microcode - Intel CPU microcode support"
---help---
@@ -163,7 +157,7 @@
# disable it for opteron optimized builds because it pulls in ACPI_BOOT
config X86_HT
bool
- depends on SMP && !MK8
+ depends on SMP && CPU_PSC
default y

config MATH_EMULATION
--- linux-2.6.7-rc2-mm2/arch/x86_64/Makefile.old 2004-06-06 14:30:55.000000000 +0200
+++ linux-2.6.7-rc2-mm2/arch/x86_64/Makefile 2004-06-06 14:40:01.000000000 +0200
@@ -37,8 +37,13 @@
OBJCOPYFLAGS := -O binary -R .note -R .comment -S
LDFLAGS_vmlinux := -e stext

-cflags-$(CONFIG_MK8) += $(call check_gcc,-march=k8,)
-cflags-$(CONFIG_MPSC) += $(call check_gcc,-march=nocona,)
+ifndef CONFIG_CPU_PSC
+ cflags-$(CONFIG_CPU_K8) += $(call check_gcc,-march=k8,)
+endif
+ifndef CONFIG_CPU_K8
+ cflags-$(CONFIG_CPU_PSC) += $(call check_gcc,-march=nocona,)
+endif
+
CFLAGS += $(cflags-y)

CFLAGS += -mno-red-zone
-
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