kernel.git/arch/mips/Kconfig, branch linux-5.13.y

MIPS: ingenic: Select CPU_SUPPORTS_CPUFREQ && MIPS_EXTERNAL_TIMER

2021-07-19T08:04:35Z

[ Upstream commit eb3849370ae32b571e1f9a63ba52c61adeaf88f7 ] The clock driving the XBurst CPUs in Ingenic SoCs is integer divided from the main PLL. As such, it is possible to control the frequency of the CPU, either by changing the divider, or by changing the rate of the main PLL. The XBurst CPUs also lack the CP0 timer; the TCU, a separate piece of hardware in the SoC, provides this functionality. Signed-off-by: Paul Cercueil Signed-off-by: Thomas Bogendoerfer Signed-off-by: Sasha Levin

mm: generalize SYS_SUPPORTS_HUGETLBFS (rename as ARCH_SUPPORTS_HUGETLBFS)

2021-05-05T18:27:25Z

SYS_SUPPORTS_HUGETLBFS config has duplicate definitions on platforms that subscribe it. Instead, just make it a generic option which can be selected on applicable platforms. Also rename it as ARCH_SUPPORTS_HUGETLBFS instead. This reduces code duplication and makes it cleaner. Link: https://lkml.kernel.org/r/1617259448-22529-3-git-send-email-anshuman.khandual@arm.com Signed-off-by: Anshuman Khandual Acked-by: Catalin Marinas [arm64] Acked-by: Palmer Dabbelt [riscv] Acked-by: Michael Ellerman [powerpc] Cc: Russell King Cc: Will Deacon Cc: Thomas Bogendoerfer Cc: "James E.J. Bottomley" Cc: Helge Deller Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Cc: Paul Walmsley Cc: Albert Ou Cc: Yoshinori Sato Cc: Rich Felker Cc: Alexander Viro Cc: Arnd Bergmann Cc: Borislav Petkov Cc: Christian Borntraeger Cc: Heiko Carstens Cc: "H. Peter Anvin" Cc: Ingo Molnar Cc: Thomas Gleixner Cc: Vasily Gorbik Cc: Vineet Gupta Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

mm/memtest: add ARCH_USE_MEMTEST

2021-04-30T18:20:36Z

early_memtest() does not get called from all architectures. Hence enabling CONFIG_MEMTEST and providing a valid memtest=[1..N] kernel command line option might not trigger the memory pattern tests as would be expected in normal circumstances. This situation is misleading. The change here prevents the above mentioned problem after introducing a new config option ARCH_USE_MEMTEST that should be subscribed on platforms that call early_memtest(), in order to enable the config CONFIG_MEMTEST. Conversely CONFIG_MEMTEST cannot be enabled on platforms where it would not be tested anyway. Link: https://lkml.kernel.org/r/1617269193-22294-1-git-send-email-anshuman.khandual@arm.com Signed-off-by: Anshuman Khandual Acked-by: Catalin Marinas (arm64) Reviewed-by: Max Filippov Cc: Russell King Cc: Will Deacon Cc: Thomas Bogendoerfer Cc: Michael Ellerman Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Chris Zankel Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

MIPS: select ARCH_KEEP_MEMBLOCK unconditionally

2021-04-23T12:07:55Z

While removing allnoconfig_y from Kconfig, ARCH=mips allnoconfig builds started failing with the error: WARNING: modpost: vmlinux.o(.text+0x9c70): Section mismatch in reference from the function reserve_exception_space() to the function .meminit.text:memblock_reserve() The function reserve_exception_space() references the function __meminit memblock_reserve(). This is often because reserve_exception_space lacks a __meminit annotation or the annotation of memblock_reserve is wrong. ERROR: modpost: Section mismatches detected. Set CONFIG_SECTION_MISMATCH_WARN_ONLY=y to allow them. allnoconfig disables DEBUG_KERNEL and thus ARCH_KEEP_MEMBLOCK, which changes __init_memblock to be equivalent to __meminit triggering the above error. Link: https://lore.kernel.org/linux-kbuild/20210313194836.372585-11-masahiroy@kernel.org/ Reported-by: Guenter Roeck Signed-off-by: Nick Desaulniers Reviewed-by: Masahiro Yamada Signed-off-by: Thomas Bogendoerfer

MIPS: Remove get_fs/set_fs

2021-04-06T13:12:58Z

All get_fs/set_fs calls in MIPS code are gone, so remove implementation of it. With the clear separation of user/kernel space access we no longer need the EVA special handling, so get rid of that, too. Signed-off-by: Thomas Bogendoerfer Reviewed-by: Christoph Hellwig

MIPS: Add support for CONFIG_DEBUG_VIRTUAL

2021-04-06T12:34:02Z

Provide hooks to intercept bad usages of virt_to_phys() and __pa_symbol() throughout the kernel. To make this possible, we need to rename the current implement of virt_to_phys() into __virt_to_phys_nodebug() and wrap it around depending on CONFIG_DEBUG_VIRTUAL. A similar thing is needed for __pa_symbol() which is now aliased to __phys_addr_symbol() whose implementation is either the direct return of RELOC_HIDE or goes through the debug version. Signed-off-by: Florian Fainelli Signed-off-by: Thomas Bogendoerfer

arch: mips: fix unmet dependency for MTD_COMPLEX_MAPPINGS

2021-03-29T09:17:38Z

When CAVIUM_OCTEON_SOC is enabled, and MTD is disabled, Kbuild gives the following warning: WARNING: unmet direct dependencies detected for MTD_COMPLEX_MAPPINGS Depends on [n]: MTD [=n] && HAS_IOMEM [=y] Selected by [y]: - CAVIUM_OCTEON_SOC [=y] && This is because CAVIUM_OCTEON_SOC selects MTD_COMPLEX_MAPPINGS, without selecting or depending on MTD, despite MTD_COMPLEX_MAPPINGS depending on MTD. Signed-off-by: Julian Braha Signed-off-by: Thomas Bogendoerfer

MIPS/bpf: Enable bpf_probe_read{, str}() on MIPS again

2021-03-29T09:17:09Z

After commit 0ebeea8ca8a4 ("bpf: Restrict bpf_probe_read{, str}() only to archs where they work"), bpf_probe_read{, str}() functions were no longer available on MIPS, so there exist some errors when running bpf program: root@linux:/home/loongson/bcc# python examples/tracing/task_switch.py bpf: Failed to load program: Invalid argument [...] 11: (85) call bpf_probe_read#4 unknown func bpf_probe_read#4 [...] Exception: Failed to load BPF program count_sched: Invalid argument ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE should be restricted to archs with non-overlapping address ranges, but they can overlap in EVA mode on MIPS, so select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE if !EVA in arch/mips/Kconfig, otherwise the bpf old helper bpf_probe_read() will not be available. This is similar with the commit d195b1d1d119 ("powerpc/bpf: Enable bpf_probe_read{, str}() on powerpc again"). Fixes: 0ebeea8ca8a4 ("bpf: Restrict bpf_probe_read{, str}() only to archs where they work") Signed-off-by: Tiezhu Yang Signed-off-by: Thomas Bogendoerfer

MIPS: clean up CONFIG_MIPS_PGD_C0_CONTEXT handling

2021-03-14T13:08:15Z

+. LOONGSON64 use 0x98xx_xxxx_xxxx_xxxx as xphys cached, instread of 0xa8xx_xxxx_xxxx_xxxx +. let CONFIG_MIPS_PGD_C0_CONTEXT depend on 64bit +. cast CAC_BASE into u64 to silence warning on MIPS32 CP0 Context has enough room for wraping pgd into its 41-bit PTEBase field. +. For XPHYS, the trick is that pgd is 4kB aligned, and the PABITS <= 53, only save 53 - 12 = 41 bits, aka : bit[63:59] | 0000 00 | bit[53:12] | 0000 0000 0000 +. for CKSEG0, only save 29 - 12 = 17 bits when switching pgd, only need to save bit[53:12] or bit[28:12] into CP0 Context's bit[63:23], see folling asm generated at run time tlbmiss_handler_setup_pgd: .set push .set noreorder dsra a2, a0, 29 move a3, a0 dins a0, zero, 29, 35 daddiu a2, a2, 4 //for CKSEG0, a2 from 0xfffffffffffffffc //into 0 movn a0, a3, a2 dsll a0, a0, 11 jr ra dmtc0 a0, CP0_CONTEXT .set pop when using it on page walking dmfc0 k0, CP0_CONTEXT dins k0, zero, 0, 23 // zero badv2 ori k0, k0, (CAC_BASE >> 53) // *prefix* with bit[63:59] drotr k0, k0, 11 // kick it in the right place Signed-off-by: Huang Pei Signed-off-by: Thomas Bogendoerfer

MIPS: Remove KVM_GUEST support

2021-03-10T14:18:40Z

KVM_GUEST is broken and unmaintained, so let's remove it. Reviewed-by: Huacai Chen Reviewed-by: Jiaxun Yang Signed-off-by: Thomas Bogendoerfer