From: "Leizhen (ThunderTown)" <thunder.leizhen@huawei.com>
To: Catalin Marinas <catalin.marinas@arm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
<x86@kernel.org>, "H . Peter Anvin" <hpa@zytor.com>,
<linux-kernel@vger.kernel.org>, Dave Young <dyoung@redhat.com>,
Baoquan He <bhe@redhat.com>, Vivek Goyal <vgoyal@redhat.com>,
Eric Biederman <ebiederm@xmission.com>,
<kexec@lists.infradead.org>, Will Deacon <will@kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
Rob Herring <robh+dt@kernel.org>,
Frank Rowand <frowand.list@gmail.com>,
<devicetree@vger.kernel.org>, "Jonathan Corbet" <corbet@lwn.net>,
<linux-doc@vger.kernel.org>, Randy Dunlap <rdunlap@infradead.org>,
Feng Zhou <zhoufeng.zf@bytedance.com>,
Kefeng Wang <wangkefeng.wang@huawei.com>,
Chen Zhou <dingguo.cz@antgroup.com>
Subject: Re: [PATCH v16 08/11] x86, arm64: Add ARCH_WANT_RESERVE_CRASH_KERNEL config
Date: Thu, 9 Dec 2021 10:06:23 +0800 [thread overview]
Message-ID: <092fd3d7-240a-da47-f252-c3c570cb8389@huawei.com> (raw)
In-Reply-To: <YbDmxIPdk7TKIKAU@arm.com>
On 2021/12/9 1:09, Catalin Marinas wrote:
> On Tue, Nov 23, 2021 at 08:46:43PM +0800, Zhen Lei wrote:
>> diff --git a/arch/Kconfig b/arch/Kconfig
>> index 26b8ed11639da46..19256aa924c3b2c 100644
>> --- a/arch/Kconfig
>> +++ b/arch/Kconfig
>> @@ -24,6 +24,9 @@ config KEXEC_ELF
>> config HAVE_IMA_KEXEC
>> bool
>>
>> +config ARCH_WANT_RESERVE_CRASH_KERNEL
>> + bool
>> +
>> config SET_FS
>> bool
>>
>> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
>> index c4207cf9bb17ffb..4b99efa36da3793 100644
>> --- a/arch/arm64/Kconfig
>> +++ b/arch/arm64/Kconfig
>> @@ -95,6 +95,7 @@ config ARM64
>> select ARCH_WANT_FRAME_POINTERS
>> select ARCH_WANT_HUGE_PMD_SHARE if ARM64_4K_PAGES || (ARM64_16K_PAGES && !ARM64_VA_BITS_36)
>> select ARCH_WANT_LD_ORPHAN_WARN
>> + select ARCH_WANT_RESERVE_CRASH_KERNEL if KEXEC_CORE
>> select ARCH_WANTS_NO_INSTR
>> select ARCH_HAS_UBSAN_SANITIZE_ALL
>> select ARM_AMBA
>> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
>> index 7399327d1eff79d..528034b4276ecf8 100644
>> --- a/arch/x86/Kconfig
>> +++ b/arch/x86/Kconfig
>> @@ -12,6 +12,7 @@ config X86_32
>> depends on !64BIT
>> # Options that are inherently 32-bit kernel only:
>> select ARCH_WANT_IPC_PARSE_VERSION
>> + select ARCH_WANT_RESERVE_CRASH_KERNEL if KEXEC_CORE
>> select CLKSRC_I8253
>> select CLONE_BACKWARDS
>> select GENERIC_VDSO_32
>> @@ -28,6 +29,7 @@ config X86_64
>> select ARCH_HAS_GIGANTIC_PAGE
>> select ARCH_SUPPORTS_INT128 if CC_HAS_INT128
>> select ARCH_USE_CMPXCHG_LOCKREF
>> + select ARCH_WANT_RESERVE_CRASH_KERNEL if KEXEC_CORE
>> select HAVE_ARCH_SOFT_DIRTY
>> select MODULES_USE_ELF_RELA
>> select NEED_DMA_MAP_STATE
>> diff --git a/kernel/crash_core.c b/kernel/crash_core.c
>> index 4dc2643fcbccf99..b23cfc0ca8905fd 100644
>> --- a/kernel/crash_core.c
>> +++ b/kernel/crash_core.c
>> @@ -321,9 +321,7 @@ int __init parse_crashkernel_low(char *cmdline,
>> * --------- Crashkernel reservation ------------------------------
>> */
>>
>> -#ifdef CONFIG_KEXEC_CORE
>> -
>> -#if defined(CONFIG_X86) || defined(CONFIG_ARM64)
>> +#ifdef CONFIG_ARCH_WANT_RESERVE_CRASH_KERNEL
>> static int __init reserve_crashkernel_low(void)
>> {
>> #ifdef CONFIG_64BIT
>> @@ -451,8 +449,7 @@ void __init reserve_crashkernel(void)
>> crashk_res.start = crash_base;
>> crashk_res.end = crash_base + crash_size - 1;
>> }
>> -#endif
>> -#endif /* CONFIG_KEXEC_CORE */
>> +#endif /* CONFIG_ARCH_WANT_RESERVE_CRASH_KERNEL */
>
> Nitpick mostly but it may simplify the patches if the x86, arch/Kconfig
> and crash_core.c changes here could be moved to patch 5. The remaining
> select for arm64 should be moved to patch 7 and drop the #if change in
> that patch.
>
> This way we can keep the x86 patches on a separate branch.
That's a good suggestion. I will do it.
>
> Thanks.
>
next prev parent reply other threads:[~2021-12-09 2:06 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-23 12:46 [PATCH v16 00/11] support reserving crashkernel above 4G on arm64 kdump Zhen Lei
2021-11-23 12:46 ` [PATCH v16 01/11] x86: kdump: replace the hard-coded alignment with macro CRASH_ALIGN Zhen Lei
2021-11-23 12:46 ` [PATCH v16 02/11] x86: kdump: make the lower bound of crash kernel reservation consistent Zhen Lei
2021-11-23 12:46 ` [PATCH v16 03/11] x86: kdump: use macro CRASH_ADDR_LOW_MAX in functions reserve_crashkernel() Zhen Lei
2021-11-23 12:46 ` [PATCH v16 04/11] x86: kdump: move xen_pv_domain() check and insert_resource() to setup_arch() Zhen Lei
2021-11-23 12:46 ` [PATCH v16 05/11] x86: kdump: move reserve_crashkernel[_low]() into crash_core.c Zhen Lei
2021-11-23 12:46 ` [PATCH v16 06/11] arm64: kdump: introduce some macros for crash kernel reservation Zhen Lei
2021-11-23 12:46 ` [PATCH v16 07/11] arm64: kdump: reimplement crashkernel=X Zhen Lei
2021-11-23 12:46 ` [PATCH v16 08/11] x86, arm64: Add ARCH_WANT_RESERVE_CRASH_KERNEL config Zhen Lei
2021-12-08 17:09 ` Catalin Marinas
2021-12-09 2:06 ` Leizhen (ThunderTown) [this message]
2021-11-23 12:46 ` [PATCH v16 09/11] of: fdt: Aggregate the processing of "linux,usable-memory-range" Zhen Lei
2021-11-30 22:05 ` Rob Herring
2021-11-23 12:46 ` [PATCH v16 10/11] of: fdt: Add memory for devices by DT property "linux,usable-memory-range" Zhen Lei
2021-11-30 22:16 ` Rob Herring
2021-12-01 2:55 ` Leizhen (ThunderTown)
2021-12-09 1:59 ` Leizhen (ThunderTown)
2021-12-09 17:40 ` Rob Herring
2021-11-23 12:46 ` [PATCH v16 11/11] kdump: update Documentation about crashkernel Zhen Lei
2021-11-29 20:25 ` [PATCH v16 00/11] support reserving crashkernel above 4G on arm64 kdump Dave Kleikamp
2021-11-30 2:12 ` Baoquan He
2021-12-06 3:51 ` john.p.donnelly
2021-12-08 17:13 ` Catalin Marinas
2021-12-10 19:53 ` john.p.donnelly
2021-12-13 10:18 ` Catalin Marinas
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