linux_dsm_epyc7002/arch/x86/include/asm/x86_init.h
Luis R. Rodriguez 80dfd83dfa x86, drivers/pnpbios: Replace paravirt_enabled() check with legacy device check
Since we are removing paravirt_enabled() replace it with a
logical equivalent. Even though PNPBIOS is x86 specific we
add an arch-specific type call, which can be implemented by
any architecture to show how other legacy attribute devices
can later be also checked for with other ACPI legacy attribute
flags.

This implicates the first ACPI 5.2.9.3 IA-PC Boot Architecture
ACPI_FADT_LEGACY_DEVICES flag device, and shows how to add more.

The reason pnpbios gets a defined structure and as such uses
a different approach than the RTC legacy quirk is that ACPI
has a respective RTC flag, while pnpbios does not. We fold
the pnpbios quirk under ACPI_FADT_LEGACY_DEVICES ACPI flag
use case, and use a struct of possible devices to enable
future extensions of this.

As per 0-day, this bumps the vmlinux size using i386-tinyconfig as
follows:

TOTAL   TEXT   init.text   x86_early_init_platform_quirks()
+32     +28    +28         +28

That's 4 byte overhead total, the rest is cleared out on init
as its all __init text.

v2: split out subarch handlng on switch to make it easier
    later to add other subarchs. The 'fall-through' switch
    handling can be confusing and we'll remove it later
    when we add handling for X86_SUBARCH_CE4100.
v3: document vmlinux size impact as per 0-day, and also
    explain why pnpbios is treated differently than the
    RTC legacy feature.

Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: andrew.cooper3@citrix.com
Cc: andriy.shevchenko@linux.intel.com
Cc: bigeasy@linutronix.de
Cc: boris.ostrovsky@oracle.com
Cc: david.vrabel@citrix.com
Cc: ffainelli@freebox.fr
Cc: george.dunlap@citrix.com
Cc: glin@suse.com
Cc: jgross@suse.com
Cc: jlee@suse.com
Cc: josh@joshtriplett.org
Cc: julien.grall@linaro.org
Cc: konrad.wilk@oracle.com
Cc: kozerkov@parallels.com
Cc: lenb@kernel.org
Cc: lguest@lists.ozlabs.org
Cc: linux-acpi@vger.kernel.org
Cc: lv.zheng@intel.com
Cc: matt@codeblueprint.co.uk
Cc: mbizon@freebox.fr
Cc: rjw@rjwysocki.net
Cc: robert.moore@intel.com
Cc: rusty@rustcorp.com.au
Cc: tiwai@suse.de
Cc: toshi.kani@hp.com
Cc: xen-devel@lists.xensource.com
Link: http://lkml.kernel.org/r/1460592286-300-12-git-send-email-mcgrof@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-04-22 10:29:05 +02:00

243 lines
7.5 KiB
C

#ifndef _ASM_X86_PLATFORM_H
#define _ASM_X86_PLATFORM_H
#include <asm/bootparam.h>
struct mpc_bus;
struct mpc_cpu;
struct mpc_table;
struct cpuinfo_x86;
/**
* struct x86_init_mpparse - platform specific mpparse ops
* @mpc_record: platform specific mpc record accounting
* @setup_ioapic_ids: platform specific ioapic id override
* @mpc_apic_id: platform specific mpc apic id assignment
* @smp_read_mpc_oem: platform specific oem mpc table setup
* @mpc_oem_pci_bus: platform specific pci bus setup (default NULL)
* @mpc_oem_bus_info: platform specific mpc bus info
* @find_smp_config: find the smp configuration
* @get_smp_config: get the smp configuration
*/
struct x86_init_mpparse {
void (*mpc_record)(unsigned int mode);
void (*setup_ioapic_ids)(void);
int (*mpc_apic_id)(struct mpc_cpu *m);
void (*smp_read_mpc_oem)(struct mpc_table *mpc);
void (*mpc_oem_pci_bus)(struct mpc_bus *m);
void (*mpc_oem_bus_info)(struct mpc_bus *m, char *name);
void (*find_smp_config)(void);
void (*get_smp_config)(unsigned int early);
};
/**
* struct x86_init_resources - platform specific resource related ops
* @probe_roms: probe BIOS roms
* @reserve_resources: reserve the standard resources for the
* platform
* @memory_setup: platform specific memory setup
*
*/
struct x86_init_resources {
void (*probe_roms)(void);
void (*reserve_resources)(void);
char *(*memory_setup)(void);
};
/**
* struct x86_init_irqs - platform specific interrupt setup
* @pre_vector_init: init code to run before interrupt vectors
* are set up.
* @intr_init: interrupt init code
* @trap_init: platform specific trap setup
*/
struct x86_init_irqs {
void (*pre_vector_init)(void);
void (*intr_init)(void);
void (*trap_init)(void);
};
/**
* struct x86_init_oem - oem platform specific customizing functions
* @arch_setup: platform specific architecure setup
* @banner: print a platform specific banner
*/
struct x86_init_oem {
void (*arch_setup)(void);
void (*banner)(void);
};
/**
* struct x86_init_paging - platform specific paging functions
* @pagetable_init: platform specific paging initialization call to setup
* the kernel pagetables and prepare accessors functions.
* Callback must call paging_init(). Called once after the
* direct mapping for phys memory is available.
*/
struct x86_init_paging {
void (*pagetable_init)(void);
};
/**
* struct x86_init_timers - platform specific timer setup
* @setup_perpcu_clockev: set up the per cpu clock event device for the
* boot cpu
* @timer_init: initialize the platform timer (default PIT/HPET)
* @wallclock_init: init the wallclock device
*/
struct x86_init_timers {
void (*setup_percpu_clockev)(void);
void (*timer_init)(void);
void (*wallclock_init)(void);
};
/**
* struct x86_init_iommu - platform specific iommu setup
* @iommu_init: platform specific iommu setup
*/
struct x86_init_iommu {
int (*iommu_init)(void);
};
/**
* struct x86_init_pci - platform specific pci init functions
* @arch_init: platform specific pci arch init call
* @init: platform specific pci subsystem init
* @init_irq: platform specific pci irq init
* @fixup_irqs: platform specific pci irq fixup
*/
struct x86_init_pci {
int (*arch_init)(void);
int (*init)(void);
void (*init_irq)(void);
void (*fixup_irqs)(void);
};
/**
* struct x86_init_ops - functions for platform specific setup
*
*/
struct x86_init_ops {
struct x86_init_resources resources;
struct x86_init_mpparse mpparse;
struct x86_init_irqs irqs;
struct x86_init_oem oem;
struct x86_init_paging paging;
struct x86_init_timers timers;
struct x86_init_iommu iommu;
struct x86_init_pci pci;
};
/**
* struct x86_cpuinit_ops - platform specific cpu hotplug setups
* @setup_percpu_clockev: set up the per cpu clock event device
* @early_percpu_clock_init: early init of the per cpu clock event device
*/
struct x86_cpuinit_ops {
void (*setup_percpu_clockev)(void);
void (*early_percpu_clock_init)(void);
void (*fixup_cpu_id)(struct cpuinfo_x86 *c, int node);
};
struct timespec;
/**
* struct x86_legacy_devices - legacy x86 devices
*
* @pnpbios: this platform can have a PNPBIOS. If this is disabled the platform
* is known to never have a PNPBIOS.
*
* These are devices known to require LPC or ISA bus. The definition of legacy
* devices adheres to the ACPI 5.2.9.3 IA-PC Boot Architecture flag
* ACPI_FADT_LEGACY_DEVICES. These devices consist of user visible devices on
* the LPC or ISA bus. User visible devices are devices that have end-user
* accessible connectors (for example, LPT parallel port). Legacy devices on
* the LPC bus consist for example of serial and parallel ports, PS/2 keyboard
* / mouse, and the floppy disk controller. A system that lacks all known
* legacy devices can assume all devices can be detected exclusively via
* standard device enumeration mechanisms including the ACPI namespace.
*
* A system which has does not have ACPI_FADT_LEGACY_DEVICES enabled must not
* have any of the legacy devices enumerated below present.
*/
struct x86_legacy_devices {
int pnpbios;
};
/**
* struct x86_legacy_features - legacy x86 features
*
* @rtc: this device has a CMOS real-time clock present
* @ebda_search: it's safe to search for the EBDA signature in the hardware's
* low RAM
* @devices: legacy x86 devices, refer to struct x86_legacy_devices
* documentation for further details.
*/
struct x86_legacy_features {
int rtc;
int ebda_search;
struct x86_legacy_devices devices;
};
/**
* struct x86_platform_ops - platform specific runtime functions
* @calibrate_tsc: calibrate TSC
* @get_wallclock: get time from HW clock like RTC etc.
* @set_wallclock: set time back to HW clock
* @is_untracked_pat_range exclude from PAT logic
* @nmi_init enable NMI on cpus
* @i8042_detect pre-detect if i8042 controller exists
* @save_sched_clock_state: save state for sched_clock() on suspend
* @restore_sched_clock_state: restore state for sched_clock() on resume
* @apic_post_init: adjust apic if neeeded
* @legacy: legacy features
* @set_legacy_features: override legacy features. Use of this callback
* is highly discouraged. You should only need
* this if your hardware platform requires further
* custom fine tuning far beyong what may be
* possible in x86_early_init_platform_quirks() by
* only using the current x86_hardware_subarch
* semantics.
*/
struct x86_platform_ops {
unsigned long (*calibrate_tsc)(void);
void (*get_wallclock)(struct timespec *ts);
int (*set_wallclock)(const struct timespec *ts);
void (*iommu_shutdown)(void);
bool (*is_untracked_pat_range)(u64 start, u64 end);
void (*nmi_init)(void);
unsigned char (*get_nmi_reason)(void);
int (*i8042_detect)(void);
void (*save_sched_clock_state)(void);
void (*restore_sched_clock_state)(void);
void (*apic_post_init)(void);
struct x86_legacy_features legacy;
void (*set_legacy_features)(void);
};
struct pci_dev;
struct x86_msi_ops {
int (*setup_msi_irqs)(struct pci_dev *dev, int nvec, int type);
void (*teardown_msi_irq)(unsigned int irq);
void (*teardown_msi_irqs)(struct pci_dev *dev);
void (*restore_msi_irqs)(struct pci_dev *dev);
};
struct x86_io_apic_ops {
unsigned int (*read) (unsigned int apic, unsigned int reg);
void (*disable)(void);
};
extern struct x86_init_ops x86_init;
extern struct x86_cpuinit_ops x86_cpuinit;
extern struct x86_platform_ops x86_platform;
extern struct x86_msi_ops x86_msi;
extern struct x86_io_apic_ops x86_io_apic_ops;
extern void x86_early_init_platform_quirks(void);
extern void x86_init_noop(void);
extern void x86_init_uint_noop(unsigned int unused);
#endif