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linux_dsm_epyc7002/arch/mips/include/asm/cpu-features.h
Paul Burton 93e01942a6
MIPS: Hardcode cpu_has_* where known at compile time due to ISA 
Many architectural features have over time moved from being optional to
either be required or removed by newer architecture releases. This means
that in many cases we can know at compile time whether a feature will be
supported or not purely due to the knowledge we have about the ISA the
kernel build is targeting.

This patch introduces a bunch of utility macros for checking for
supported options, ASEs & combinations of those with ISA revisions. It
then makes use of these in the default definitions of cpu_has_* macros.
The result is that many of the macros become compile-time constant,
allowing more optimisation opportunities for the compiler - particularly
with kernels built for later ISA revisions.

To demonstrate the effect of this patch, the following table shows the
size in bytes of the kernel binary as reported by scripts/bloat-o-meter
for v4.12-rc4 maltasmvp_defconfig kernels with & without this patch. A
variant of maltasmvp_defconfig with CONFIG_CPU_MIPS32_R6 selected is
also shown, to demonstrate that MIPSr6 systems benefit more due to extra
features becoming required by that architecture revision. Builds of
pistachio_defconfig are also shown, as although this is a MIPSr2
platform it doesn't hardcode any features in a machine-specific
cpu-feature-overrides.h, which allows it to gain more from this patch
than the equivalent Malta r2 build.

     Config         | Before  | After   |  Change
    ----------------|---------|---------|---------
     maltasmvp      | 7248316 | 7247714 |    -602
     maltasmvp + r6 | 6955595 | 6950777 |   -4818
     pistachio      | 8650977 | 8363898 | -287079

Signed-off-by: Paul Burton <paul.burton@mips.com>
Patchwork: https://patchwork.linux-mips.org/patch/16360/
Cc: Joshua Kinard <kumba@gentoo.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
2018-07-24 14:09:13 -07:00

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/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2003, 2004 Ralf Baechle
* Copyright (C) 2004 Maciej W. Rozycki
*/
#ifndef __ASM_CPU_FEATURES_H
#define __ASM_CPU_FEATURES_H
#include <asm/cpu.h>
#include <asm/cpu-info.h>
#include <asm/isa-rev.h>
#include <cpu-feature-overrides.h>
#define __ase(ase) (cpu_data[0].ases & (ase))
#define __opt(opt) (cpu_data[0].options & (opt))
/*
* Check if MIPS_ISA_REV is >= isa *and* an option or ASE is detected during
* boot (typically by cpu_probe()).
*
* Note that these should only be used in cases where a kernel built for an
* older ISA *cannot* run on a CPU which supports the feature in question. For
* example this may be used for features introduced with MIPSr6, since a kernel
* built for an older ISA cannot run on a MIPSr6 CPU. This should not be used
* for MIPSr2 features however, since a MIPSr1 or earlier kernel might run on a
* MIPSr2 CPU.
*/
#define __isa_ge_and_ase(isa, ase) ((MIPS_ISA_REV >= (isa)) && __ase(ase))
#define __isa_ge_and_opt(isa, opt) ((MIPS_ISA_REV >= (isa)) && __opt(opt))
/*
* Check if MIPS_ISA_REV is >= isa *or* an option or ASE is detected during
* boot (typically by cpu_probe()).
*
* These are for use with features that are optional up until a particular ISA
* revision & then become required.
*/
#define __isa_ge_or_ase(isa, ase) ((MIPS_ISA_REV >= (isa)) || __ase(ase))
#define __isa_ge_or_opt(isa, opt) ((MIPS_ISA_REV >= (isa)) || __opt(opt))
/*
* Check if MIPS_ISA_REV is < isa *and* an option or ASE is detected during
* boot (typically by cpu_probe()).
*
* These are for use with features that are optional up until a particular ISA
* revision & are then removed - ie. no longer present in any CPU implementing
* the given ISA revision.
*/
#define __isa_lt_and_ase(isa, ase) ((MIPS_ISA_REV < (isa)) && __ase(ase))
#define __isa_lt_and_opt(isa, opt) ((MIPS_ISA_REV < (isa)) && __opt(opt))
/*
* SMP assumption: Options of CPU 0 are a superset of all processors.
* This is true for all known MIPS systems.
*/
#ifndef cpu_has_tlb
#define cpu_has_tlb __opt(MIPS_CPU_TLB)
#endif
#ifndef cpu_has_ftlb
#define cpu_has_ftlb __opt(MIPS_CPU_FTLB)
#endif
#ifndef cpu_has_tlbinv
#define cpu_has_tlbinv __opt(MIPS_CPU_TLBINV)
#endif
#ifndef cpu_has_segments
#define cpu_has_segments __opt(MIPS_CPU_SEGMENTS)
#endif
#ifndef cpu_has_eva
#define cpu_has_eva __opt(MIPS_CPU_EVA)
#endif
#ifndef cpu_has_htw
#define cpu_has_htw __opt(MIPS_CPU_HTW)
#endif
#ifndef cpu_has_ldpte
#define cpu_has_ldpte __opt(MIPS_CPU_LDPTE)
#endif
#ifndef cpu_has_rixiex
#define cpu_has_rixiex __isa_ge_or_opt(6, MIPS_CPU_RIXIEX)
#endif
#ifndef cpu_has_maar
#define cpu_has_maar __opt(MIPS_CPU_MAAR)
#endif
#ifndef cpu_has_rw_llb
#define cpu_has_rw_llb __isa_ge_or_opt(6, MIPS_CPU_RW_LLB)
#endif
/*
* For the moment we don't consider R6000 and R8000 so we can assume that
* anything that doesn't support R4000-style exceptions and interrupts is
* R3000-like. Users should still treat these two macro definitions as
* opaque.
*/
#ifndef cpu_has_3kex
#define cpu_has_3kex (!cpu_has_4kex)
#endif
#ifndef cpu_has_4kex
#define cpu_has_4kex __isa_ge_or_opt(1, MIPS_CPU_4KEX)
#endif
#ifndef cpu_has_3k_cache
#define cpu_has_3k_cache __isa_lt_and_opt(1, MIPS_CPU_3K_CACHE)
#endif
#define cpu_has_6k_cache 0
#define cpu_has_8k_cache 0
#ifndef cpu_has_4k_cache
#define cpu_has_4k_cache __isa_ge_or_opt(1, MIPS_CPU_4K_CACHE)
#endif
#ifndef cpu_has_tx39_cache
#define cpu_has_tx39_cache __opt(MIPS_CPU_TX39_CACHE)
#endif
#ifndef cpu_has_octeon_cache
#define cpu_has_octeon_cache 0
#endif
/* Don't override `cpu_has_fpu' to 1 or the "nofpu" option won't work. */
#ifndef cpu_has_fpu
#define cpu_has_fpu (current_cpu_data.options & MIPS_CPU_FPU)
#define raw_cpu_has_fpu (raw_current_cpu_data.options & MIPS_CPU_FPU)
#else
#define raw_cpu_has_fpu cpu_has_fpu
#endif
#ifndef cpu_has_32fpr
#define cpu_has_32fpr __isa_ge_or_opt(1, MIPS_CPU_32FPR)
#endif
#ifndef cpu_has_counter
#define cpu_has_counter __opt(MIPS_CPU_COUNTER)
#endif
#ifndef cpu_has_watch
#define cpu_has_watch __opt(MIPS_CPU_WATCH)
#endif
#ifndef cpu_has_divec
#define cpu_has_divec __isa_ge_or_opt(1, MIPS_CPU_DIVEC)
#endif
#ifndef cpu_has_vce
#define cpu_has_vce __opt(MIPS_CPU_VCE)
#endif
#ifndef cpu_has_cache_cdex_p
#define cpu_has_cache_cdex_p __opt(MIPS_CPU_CACHE_CDEX_P)
#endif
#ifndef cpu_has_cache_cdex_s
#define cpu_has_cache_cdex_s __opt(MIPS_CPU_CACHE_CDEX_S)
#endif
#ifndef cpu_has_prefetch
#define cpu_has_prefetch __isa_ge_or_opt(1, MIPS_CPU_PREFETCH)
#endif
#ifndef cpu_has_mcheck
#define cpu_has_mcheck __isa_ge_or_opt(1, MIPS_CPU_MCHECK)
#endif
#ifndef cpu_has_ejtag
#define cpu_has_ejtag __opt(MIPS_CPU_EJTAG)
#endif
#ifndef cpu_has_llsc
#define cpu_has_llsc __isa_ge_or_opt(1, MIPS_CPU_LLSC)
#endif
#ifndef cpu_has_bp_ghist
#define cpu_has_bp_ghist __opt(MIPS_CPU_BP_GHIST)
#endif
#ifndef kernel_uses_llsc
#define kernel_uses_llsc cpu_has_llsc
#endif
#ifndef cpu_has_guestctl0ext
#define cpu_has_guestctl0ext __opt(MIPS_CPU_GUESTCTL0EXT)
#endif
#ifndef cpu_has_guestctl1
#define cpu_has_guestctl1 __opt(MIPS_CPU_GUESTCTL1)
#endif
#ifndef cpu_has_guestctl2
#define cpu_has_guestctl2 __opt(MIPS_CPU_GUESTCTL2)
#endif
#ifndef cpu_has_guestid
#define cpu_has_guestid __opt(MIPS_CPU_GUESTID)
#endif
#ifndef cpu_has_drg
#define cpu_has_drg __opt(MIPS_CPU_DRG)
#endif
#ifndef cpu_has_mips16
#define cpu_has_mips16 __isa_lt_and_ase(6, MIPS_ASE_MIPS16)
#endif
#ifndef cpu_has_mips16e2
#define cpu_has_mips16e2 __isa_lt_and_ase(6, MIPS_ASE_MIPS16E2)
#endif
#ifndef cpu_has_mdmx
#define cpu_has_mdmx __isa_lt_and_ase(6, MIPS_ASE_MDMX)
#endif
#ifndef cpu_has_mips3d
#define cpu_has_mips3d __isa_lt_and_ase(6, MIPS_ASE_MIPS3D)
#endif
#ifndef cpu_has_smartmips
#define cpu_has_smartmips __isa_lt_and_ase(6, MIPS_ASE_SMARTMIPS)
#endif
#ifndef cpu_has_rixi
#define cpu_has_rixi __isa_ge_or_opt(6, MIPS_CPU_RIXI)
#endif
#ifndef cpu_has_mmips
# ifdef CONFIG_SYS_SUPPORTS_MICROMIPS
# define cpu_has_mmips __opt(MIPS_CPU_MICROMIPS)
# else
# define cpu_has_mmips 0
# endif
#endif
#ifndef cpu_has_lpa
#define cpu_has_lpa __opt(MIPS_CPU_LPA)
#endif
#ifndef cpu_has_mvh
#define cpu_has_mvh __opt(MIPS_CPU_MVH)
#endif
#ifndef cpu_has_xpa
#define cpu_has_xpa (cpu_has_lpa && cpu_has_mvh)
#endif
#ifndef cpu_has_vtag_icache
#define cpu_has_vtag_icache (cpu_data[0].icache.flags & MIPS_CACHE_VTAG)
#endif
#ifndef cpu_has_dc_aliases
#define cpu_has_dc_aliases (cpu_data[0].dcache.flags & MIPS_CACHE_ALIASES)
#endif
#ifndef cpu_has_ic_fills_f_dc
#define cpu_has_ic_fills_f_dc (cpu_data[0].icache.flags & MIPS_CACHE_IC_F_DC)
#endif
#ifndef cpu_has_pindexed_dcache
#define cpu_has_pindexed_dcache (cpu_data[0].dcache.flags & MIPS_CACHE_PINDEX)
#endif
#ifndef cpu_has_local_ebase
#define cpu_has_local_ebase 1
#endif
/*
* I-Cache snoops remote store. This only matters on SMP. Some multiprocessors
* such as the R10000 have I-Caches that snoop local stores; the embedded ones
* don't. For maintaining I-cache coherency this means we need to flush the
* D-cache all the way back to whever the I-cache does refills from, so the
* I-cache has a chance to see the new data at all. Then we have to flush the
* I-cache also.
* Note we may have been rescheduled and may no longer be running on the CPU
* that did the store so we can't optimize this into only doing the flush on
* the local CPU.
*/
#ifndef cpu_icache_snoops_remote_store
#ifdef CONFIG_SMP
#define cpu_icache_snoops_remote_store (cpu_data[0].icache.flags & MIPS_IC_SNOOPS_REMOTE)
#else
#define cpu_icache_snoops_remote_store 1
#endif
#endif
/* __builtin_constant_p(cpu_has_mips_r) && cpu_has_mips_r */
#if !((defined(cpu_has_mips32r1) && cpu_has_mips32r1) || \
(defined(cpu_has_mips32r2) && cpu_has_mips32r2) || \
(defined(cpu_has_mips32r6) && cpu_has_mips32r6) || \
(defined(cpu_has_mips64r1) && cpu_has_mips64r1) || \
(defined(cpu_has_mips64r2) && cpu_has_mips64r2) || \
(defined(cpu_has_mips64r6) && cpu_has_mips64r6))
#define CPU_NO_EFFICIENT_FFS 1
#endif
#ifndef cpu_has_mips_1
# define cpu_has_mips_1 (!cpu_has_mips_r6)
#endif
#ifndef cpu_has_mips_2
# define cpu_has_mips_2 (cpu_data[0].isa_level & MIPS_CPU_ISA_II)
#endif
#ifndef cpu_has_mips_3
# define cpu_has_mips_3 (cpu_data[0].isa_level & MIPS_CPU_ISA_III)
#endif
#ifndef cpu_has_mips_4
# define cpu_has_mips_4 (cpu_data[0].isa_level & MIPS_CPU_ISA_IV)
#endif
#ifndef cpu_has_mips_5
# define cpu_has_mips_5 (cpu_data[0].isa_level & MIPS_CPU_ISA_V)
#endif
#ifndef cpu_has_mips32r1
# define cpu_has_mips32r1 (cpu_data[0].isa_level & MIPS_CPU_ISA_M32R1)
#endif
#ifndef cpu_has_mips32r2
# define cpu_has_mips32r2 (cpu_data[0].isa_level & MIPS_CPU_ISA_M32R2)
#endif
#ifndef cpu_has_mips32r6
# define cpu_has_mips32r6 (cpu_data[0].isa_level & MIPS_CPU_ISA_M32R6)
#endif
#ifndef cpu_has_mips64r1
# define cpu_has_mips64r1 (cpu_data[0].isa_level & MIPS_CPU_ISA_M64R1)
#endif
#ifndef cpu_has_mips64r2
# define cpu_has_mips64r2 (cpu_data[0].isa_level & MIPS_CPU_ISA_M64R2)
#endif
#ifndef cpu_has_mips64r6
# define cpu_has_mips64r6 (cpu_data[0].isa_level & MIPS_CPU_ISA_M64R6)
#endif
/*
* Shortcuts ...
*/
#define cpu_has_mips_2_3_4_5 (cpu_has_mips_2 | cpu_has_mips_3_4_5)
#define cpu_has_mips_3_4_5 (cpu_has_mips_3 | cpu_has_mips_4_5)
#define cpu_has_mips_4_5 (cpu_has_mips_4 | cpu_has_mips_5)
#define cpu_has_mips_2_3_4_5_r (cpu_has_mips_2 | cpu_has_mips_3_4_5_r)
#define cpu_has_mips_3_4_5_r (cpu_has_mips_3 | cpu_has_mips_4_5_r)
#define cpu_has_mips_4_5_r (cpu_has_mips_4 | cpu_has_mips_5_r)
#define cpu_has_mips_5_r (cpu_has_mips_5 | cpu_has_mips_r)
#define cpu_has_mips_3_4_5_64_r2_r6 \
(cpu_has_mips_3 | cpu_has_mips_4_5_64_r2_r6)
#define cpu_has_mips_4_5_64_r2_r6 \
(cpu_has_mips_4_5 | cpu_has_mips64r1 | \
cpu_has_mips_r2 | cpu_has_mips_r6)
#define cpu_has_mips32 (cpu_has_mips32r1 | cpu_has_mips32r2 | cpu_has_mips32r6)
#define cpu_has_mips64 (cpu_has_mips64r1 | cpu_has_mips64r2 | cpu_has_mips64r6)
#define cpu_has_mips_r1 (cpu_has_mips32r1 | cpu_has_mips64r1)
#define cpu_has_mips_r2 (cpu_has_mips32r2 | cpu_has_mips64r2)
#define cpu_has_mips_r6 (cpu_has_mips32r6 | cpu_has_mips64r6)
#define cpu_has_mips_r (cpu_has_mips32r1 | cpu_has_mips32r2 | \
cpu_has_mips32r6 | cpu_has_mips64r1 | \
cpu_has_mips64r2 | cpu_has_mips64r6)
/* MIPSR2 and MIPSR6 have a lot of similarities */
#define cpu_has_mips_r2_r6 (cpu_has_mips_r2 | cpu_has_mips_r6)
/*
* cpu_has_mips_r2_exec_hazard - return if IHB is required on current processor
*
* Returns non-zero value if the current processor implementation requires
* an IHB instruction to deal with an instruction hazard as per MIPS R2
* architecture specification, zero otherwise.
*/
#ifndef cpu_has_mips_r2_exec_hazard
#define cpu_has_mips_r2_exec_hazard \
({ \
int __res; \
\
switch (current_cpu_type()) { \
case CPU_M14KC: \
case CPU_74K: \
case CPU_1074K: \
case CPU_PROAPTIV: \
case CPU_P5600: \
case CPU_M5150: \
case CPU_QEMU_GENERIC: \
case CPU_CAVIUM_OCTEON: \
case CPU_CAVIUM_OCTEON_PLUS: \
case CPU_CAVIUM_OCTEON2: \
case CPU_CAVIUM_OCTEON3: \
__res = 0; \
break; \
\
default: \
__res = 1; \
} \
\
__res; \
})
#endif
/*
* MIPS32, MIPS64, VR5500, IDT32332, IDT32334 and maybe a few other
* pre-MIPS32/MIPS64 processors have CLO, CLZ. The IDT RC64574 is 64-bit and
* has CLO and CLZ but not DCLO nor DCLZ. For 64-bit kernels
* cpu_has_clo_clz also indicates the availability of DCLO and DCLZ.
*/
#ifndef cpu_has_clo_clz
#define cpu_has_clo_clz cpu_has_mips_r
#endif
/*
* MIPS32 R2, MIPS64 R2, Loongson 3A and Octeon have WSBH.
* MIPS64 R2, Loongson 3A and Octeon have WSBH, DSBH and DSHD.
* This indicates the availability of WSBH and in case of 64 bit CPUs also
* DSBH and DSHD.
*/
#ifndef cpu_has_wsbh
#define cpu_has_wsbh cpu_has_mips_r2
#endif
#ifndef cpu_has_dsp
#define cpu_has_dsp __ase(MIPS_ASE_DSP)
#endif
#ifndef cpu_has_dsp2
#define cpu_has_dsp2 __ase(MIPS_ASE_DSP2P)
#endif
#ifndef cpu_has_dsp3
#define cpu_has_dsp3 __ase(MIPS_ASE_DSP3)
#endif
#ifndef cpu_has_mipsmt
#define cpu_has_mipsmt __isa_lt_and_ase(6, MIPS_ASE_MIPSMT)
#endif
#ifndef cpu_has_vp
#define cpu_has_vp __isa_ge_and_opt(6, MIPS_CPU_VP)
#endif
#ifndef cpu_has_userlocal
#define cpu_has_userlocal __isa_ge_or_opt(6, MIPS_CPU_ULRI)
#endif
#ifdef CONFIG_32BIT
# ifndef cpu_has_nofpuex
# define cpu_has_nofpuex __isa_lt_and_opt(1, MIPS_CPU_NOFPUEX)
# endif
# ifndef cpu_has_64bits
# define cpu_has_64bits (cpu_data[0].isa_level & MIPS_CPU_ISA_64BIT)
# endif
# ifndef cpu_has_64bit_zero_reg
# define cpu_has_64bit_zero_reg (cpu_data[0].isa_level & MIPS_CPU_ISA_64BIT)
# endif
# ifndef cpu_has_64bit_gp_regs
# define cpu_has_64bit_gp_regs 0
# endif
# ifndef cpu_has_64bit_addresses
# define cpu_has_64bit_addresses 0
# endif
# ifndef cpu_vmbits
# define cpu_vmbits 31
# endif
#endif
#ifdef CONFIG_64BIT
# ifndef cpu_has_nofpuex
# define cpu_has_nofpuex 0
# endif
# ifndef cpu_has_64bits
# define cpu_has_64bits 1
# endif
# ifndef cpu_has_64bit_zero_reg
# define cpu_has_64bit_zero_reg 1
# endif
# ifndef cpu_has_64bit_gp_regs
# define cpu_has_64bit_gp_regs 1
# endif
# ifndef cpu_has_64bit_addresses
# define cpu_has_64bit_addresses 1
# endif
# ifndef cpu_vmbits
# define cpu_vmbits cpu_data[0].vmbits
# define __NEED_VMBITS_PROBE
# endif
#endif
#if defined(CONFIG_CPU_MIPSR2_IRQ_VI) && !defined(cpu_has_vint)
# define cpu_has_vint __opt(MIPS_CPU_VINT)
#elif !defined(cpu_has_vint)
# define cpu_has_vint 0
#endif
#if defined(CONFIG_CPU_MIPSR2_IRQ_EI) && !defined(cpu_has_veic)
# define cpu_has_veic __opt(MIPS_CPU_VEIC)
#elif !defined(cpu_has_veic)
# define cpu_has_veic 0
#endif
#ifndef cpu_has_inclusive_pcaches
#define cpu_has_inclusive_pcaches __opt(MIPS_CPU_INCLUSIVE_CACHES)
#endif
#ifndef cpu_dcache_line_size
#define cpu_dcache_line_size() cpu_data[0].dcache.linesz
#endif
#ifndef cpu_icache_line_size
#define cpu_icache_line_size() cpu_data[0].icache.linesz
#endif
#ifndef cpu_scache_line_size
#define cpu_scache_line_size() cpu_data[0].scache.linesz
#endif
#ifndef cpu_tcache_line_size
#define cpu_tcache_line_size() cpu_data[0].tcache.linesz
#endif
#ifndef cpu_hwrena_impl_bits
#define cpu_hwrena_impl_bits 0
#endif
#ifndef cpu_has_perf_cntr_intr_bit
#define cpu_has_perf_cntr_intr_bit __opt(MIPS_CPU_PCI)
#endif
#ifndef cpu_has_vz
#define cpu_has_vz __ase(MIPS_ASE_VZ)
#endif
#if defined(CONFIG_CPU_HAS_MSA) && !defined(cpu_has_msa)
# define cpu_has_msa __ase(MIPS_ASE_MSA)
#elif !defined(cpu_has_msa)
# define cpu_has_msa 0
#endif
#ifndef cpu_has_ufr
# define cpu_has_ufr __opt(MIPS_CPU_UFR)
#endif
#ifndef cpu_has_fre
# define cpu_has_fre __opt(MIPS_CPU_FRE)
#endif
#ifndef cpu_has_cdmm
# define cpu_has_cdmm __opt(MIPS_CPU_CDMM)
#endif
#ifndef cpu_has_small_pages
# define cpu_has_small_pages __opt(MIPS_CPU_SP)
#endif
#ifndef cpu_has_nan_legacy
#define cpu_has_nan_legacy __isa_lt_and_opt(6, MIPS_CPU_NAN_LEGACY)
#endif
#ifndef cpu_has_nan_2008
#define cpu_has_nan_2008 __isa_ge_or_opt(6, MIPS_CPU_NAN_2008)
#endif
#ifndef cpu_has_ebase_wg
# define cpu_has_ebase_wg __opt(MIPS_CPU_EBASE_WG)
#endif
#ifndef cpu_has_badinstr
# define cpu_has_badinstr __isa_ge_or_opt(6, MIPS_CPU_BADINSTR)
#endif
#ifndef cpu_has_badinstrp
# define cpu_has_badinstrp __isa_ge_or_opt(6, MIPS_CPU_BADINSTRP)
#endif
#ifndef cpu_has_contextconfig
# define cpu_has_contextconfig __opt(MIPS_CPU_CTXTC)
#endif
#ifndef cpu_has_perf
# define cpu_has_perf __opt(MIPS_CPU_PERF)
#endif
#ifdef CONFIG_SMP
/*
* Some systems share FTLB RAMs between threads within a core (siblings in
* kernel parlance). This means that FTLB entries may become invalid at almost
* any point when an entry is evicted due to a sibling thread writing an entry
* to the shared FTLB RAM.
*
* This is only relevant to SMP systems, and the only systems that exhibit this
* property implement MIPSr6 or higher so we constrain support for this to
* kernels that will run on such systems.
*/
# ifndef cpu_has_shared_ftlb_ram
# define cpu_has_shared_ftlb_ram \
__isa_ge_and_opt(6, MIPS_CPU_SHARED_FTLB_RAM)
# endif
/*
* Some systems take this a step further & share FTLB entries between siblings.
* This is implemented as TLB writes happening as usual, but if an entry
* written by a sibling exists in the shared FTLB for a translation which would
* otherwise cause a TLB refill exception then the CPU will use the entry
* written by its sibling rather than triggering a refill & writing a matching
* TLB entry for itself.
*
* This is naturally only valid if a TLB entry is known to be suitable for use
* on all siblings in a CPU, and so it only takes effect when MMIDs are in use
* rather than ASIDs or when a TLB entry is marked global.
*/
# ifndef cpu_has_shared_ftlb_entries
# define cpu_has_shared_ftlb_entries \
__isa_ge_and_opt(6, MIPS_CPU_SHARED_FTLB_ENTRIES)
# endif
#endif /* SMP */
#ifndef cpu_has_shared_ftlb_ram
# define cpu_has_shared_ftlb_ram 0
#endif
#ifndef cpu_has_shared_ftlb_entries
# define cpu_has_shared_ftlb_entries 0
#endif
#ifdef CONFIG_MIPS_MT_SMP
# define cpu_has_mipsmt_pertccounters \
__isa_lt_and_opt(6, MIPS_CPU_MT_PER_TC_PERF_COUNTERS)
#else
# define cpu_has_mipsmt_pertccounters 0
#endif /* CONFIG_MIPS_MT_SMP */
/*
* Guest capabilities
*/
#ifndef cpu_guest_has_conf1
#define cpu_guest_has_conf1 (cpu_data[0].guest.conf & (1 << 1))
#endif
#ifndef cpu_guest_has_conf2
#define cpu_guest_has_conf2 (cpu_data[0].guest.conf & (1 << 2))
#endif
#ifndef cpu_guest_has_conf3
#define cpu_guest_has_conf3 (cpu_data[0].guest.conf & (1 << 3))
#endif
#ifndef cpu_guest_has_conf4
#define cpu_guest_has_conf4 (cpu_data[0].guest.conf & (1 << 4))
#endif
#ifndef cpu_guest_has_conf5
#define cpu_guest_has_conf5 (cpu_data[0].guest.conf & (1 << 5))
#endif
#ifndef cpu_guest_has_conf6
#define cpu_guest_has_conf6 (cpu_data[0].guest.conf & (1 << 6))
#endif
#ifndef cpu_guest_has_conf7
#define cpu_guest_has_conf7 (cpu_data[0].guest.conf & (1 << 7))
#endif
#ifndef cpu_guest_has_fpu
#define cpu_guest_has_fpu (cpu_data[0].guest.options & MIPS_CPU_FPU)
#endif
#ifndef cpu_guest_has_watch
#define cpu_guest_has_watch (cpu_data[0].guest.options & MIPS_CPU_WATCH)
#endif
#ifndef cpu_guest_has_contextconfig
#define cpu_guest_has_contextconfig (cpu_data[0].guest.options & MIPS_CPU_CTXTC)
#endif
#ifndef cpu_guest_has_segments
#define cpu_guest_has_segments (cpu_data[0].guest.options & MIPS_CPU_SEGMENTS)
#endif
#ifndef cpu_guest_has_badinstr
#define cpu_guest_has_badinstr (cpu_data[0].guest.options & MIPS_CPU_BADINSTR)
#endif
#ifndef cpu_guest_has_badinstrp
#define cpu_guest_has_badinstrp (cpu_data[0].guest.options & MIPS_CPU_BADINSTRP)
#endif
#ifndef cpu_guest_has_htw
#define cpu_guest_has_htw (cpu_data[0].guest.options & MIPS_CPU_HTW)
#endif
#ifndef cpu_guest_has_mvh
#define cpu_guest_has_mvh (cpu_data[0].guest.options & MIPS_CPU_MVH)
#endif
#ifndef cpu_guest_has_msa
#define cpu_guest_has_msa (cpu_data[0].guest.ases & MIPS_ASE_MSA)
#endif
#ifndef cpu_guest_has_kscr
#define cpu_guest_has_kscr(n) (cpu_data[0].guest.kscratch_mask & (1u << (n)))
#endif
#ifndef cpu_guest_has_rw_llb
#define cpu_guest_has_rw_llb (cpu_has_mips_r6 || (cpu_data[0].guest.options & MIPS_CPU_RW_LLB))
#endif
#ifndef cpu_guest_has_perf
#define cpu_guest_has_perf (cpu_data[0].guest.options & MIPS_CPU_PERF)
#endif
#ifndef cpu_guest_has_maar
#define cpu_guest_has_maar (cpu_data[0].guest.options & MIPS_CPU_MAAR)
#endif
#ifndef cpu_guest_has_userlocal
#define cpu_guest_has_userlocal (cpu_data[0].guest.options & MIPS_CPU_ULRI)
#endif
/*
* Guest dynamic capabilities
*/
#ifndef cpu_guest_has_dyn_fpu
#define cpu_guest_has_dyn_fpu (cpu_data[0].guest.options_dyn & MIPS_CPU_FPU)
#endif
#ifndef cpu_guest_has_dyn_watch
#define cpu_guest_has_dyn_watch (cpu_data[0].guest.options_dyn & MIPS_CPU_WATCH)
#endif
#ifndef cpu_guest_has_dyn_contextconfig
#define cpu_guest_has_dyn_contextconfig (cpu_data[0].guest.options_dyn & MIPS_CPU_CTXTC)
#endif
#ifndef cpu_guest_has_dyn_perf
#define cpu_guest_has_dyn_perf (cpu_data[0].guest.options_dyn & MIPS_CPU_PERF)
#endif
#ifndef cpu_guest_has_dyn_msa
#define cpu_guest_has_dyn_msa (cpu_data[0].guest.ases_dyn & MIPS_ASE_MSA)
#endif
#ifndef cpu_guest_has_dyn_maar
#define cpu_guest_has_dyn_maar (cpu_data[0].guest.options_dyn & MIPS_CPU_MAAR)
#endif
#endif /* __ASM_CPU_FEATURES_H */
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