On Wed, Aug 29, 2018 at 08:42:49PM +0800, Pu Wen wrote: > Add x86 architecture support for new processor Hygon Dhyana Family 18h. > Rework to create a separated file(arch/x86/kernel/cpu/hygon.c) from the > AMD init one(arch/x86/kernel/cpu/amd.c) to initialize Dhyana CPU. In > this way we can remove old AMD architecture support codes from Hygon > code path and generate a clear initialization flow for Hygon processors. > It also reduce long-term maintenance effort. > Also add Maintainer information for hygon.c in accordance. > > To identify Hygon processors, add a new vendor type X86_VENDOR_HYGON(9) > for system recognition. > > To enable Hygon processor config, add a separated Kconfig entry > (CPU_SUP_HYGON) for Dhyana CPU in kernel config setup. > > Signed-off-by: Pu Wen <[email protected]> > --- > MAINTAINERS | 6 + > arch/x86/Kconfig.cpu | 13 ++ > arch/x86/include/asm/processor.h | 3 +- > arch/x86/kernel/cpu/Makefile | 1 + > arch/x86/kernel/cpu/hygon.c | 408 > +++++++++++++++++++++++++++++++++++++++ > 5 files changed, 430 insertions(+), 1 deletion(-) > create mode 100644 arch/x86/kernel/cpu/hygon.c > > diff --git a/MAINTAINERS b/MAINTAINERS > index a5b256b..9c1d920 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -6759,6 +6759,12 @@ S: Maintained > F: mm/memory-failure.c > F: mm/hwpoison-inject.c > > +HYGON PROCESSOR SUPPORT > +M: Pu Wen <[email protected]> > +L: [email protected]
This is probably the wrong ML. You either have your own or use lkml, I'd say. > +S: Supported > +F: arch/x86/kernel/cpu/hygon.c > + > Hyper-V CORE AND DRIVERS > M: "K. Y. Srinivasan" <[email protected]> > M: Haiyang Zhang <[email protected]> > diff --git a/arch/x86/Kconfig.cpu b/arch/x86/Kconfig.cpu > index 638411f..2e92267 100644 > --- a/arch/x86/Kconfig.cpu > +++ b/arch/x86/Kconfig.cpu > @@ -426,6 +426,19 @@ config CPU_SUP_AMD > > If unsure, say N. > > +config CPU_SUP_HYGON > + default y > + bool "Support Hygon processors" if PROCESSOR_SELECT > + help > + This enables detection, tunings and quirks for Hygon processors > + > + You need this enabled if you want your kernel to run on an > + Hygon CPU. Disabling this option on other types of CPUs > + makes the kernel a tiny bit smaller. Disabling it on an Hygon > + CPU might render the kernel unbootable. > + > + If unsure, say N. > + > config CPU_SUP_CENTAUR > default y > bool "Support Centaur processors" if PROCESSOR_SELECT > diff --git a/arch/x86/include/asm/processor.h > b/arch/x86/include/asm/processor.h > index c242972..9f18cdb 100644 > --- a/arch/x86/include/asm/processor.h > +++ b/arch/x86/include/asm/processor.h > @@ -153,7 +153,8 @@ enum cpuid_regs_idx { > #define X86_VENDOR_CENTAUR 5 > #define X86_VENDOR_TRANSMETA 7 > #define X86_VENDOR_NSC 8 > -#define X86_VENDOR_NUM 9 > +#define X86_VENDOR_HYGON 9 > +#define X86_VENDOR_NUM 10 > > #define X86_VENDOR_UNKNOWN 0xff > > diff --git a/arch/x86/kernel/cpu/Makefile b/arch/x86/kernel/cpu/Makefile > index 347137e..1f5d229 100644 > --- a/arch/x86/kernel/cpu/Makefile > +++ b/arch/x86/kernel/cpu/Makefile > @@ -30,6 +30,7 @@ obj-$(CONFIG_X86_FEATURE_NAMES) += capflags.o powerflags.o > > obj-$(CONFIG_CPU_SUP_INTEL) += intel.o intel_pconfig.o > obj-$(CONFIG_CPU_SUP_AMD) += amd.o > +obj-$(CONFIG_CPU_SUP_HYGON) += hygon.o > obj-$(CONFIG_CPU_SUP_CYRIX_32) += cyrix.o > obj-$(CONFIG_CPU_SUP_CENTAUR) += centaur.o > obj-$(CONFIG_CPU_SUP_TRANSMETA_32) += transmeta.o > diff --git a/arch/x86/kernel/cpu/hygon.c b/arch/x86/kernel/cpu/hygon.c > new file mode 100644 > index 0000000..ae90d1f > --- /dev/null > +++ b/arch/x86/kernel/cpu/hygon.c > @@ -0,0 +1,408 @@ > +// SPDX-License-Identifier: GPL-2.0+ > +/* > + * Hygon Processor Support for Linux > + * > + * Copyright (c) Chengdu Haiguang IC Design Co., Ltd. > + * > + * Author: 2018 Pu Wen <[email protected]> Year goes with the copyright. Otherwise looks ok. -- Regards/Gruss, Boris. ECO tip #101: Trim your mails when you reply. --
