From: Eric DeVolder <eric.devolder@oracle.com>
To: linux-kernel@vger.kernel.org, x86@kernel.org,
kexec@lists.infradead.org, ebiederm@xmission.com,
dyoung@redhat.com, bhe@redhat.com, vgoyal@redhat.com
Cc: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de,
dave.hansen@linux.intel.com, hpa@zytor.com,
nramas@linux.microsoft.com, thomas.lendacky@amd.com,
robh@kernel.org, efault@gmx.de, rppt@kernel.org,
konrad.wilk@oracle.com, boris.ostrovsky@oracle.com,
eric.devolder@oracle.com
Subject: [RFC v2 3/6] crash hp: definitions and prototype changes
Date: Tue, 7 Dec 2021 14:52:01 -0500 [thread overview]
Message-ID: <20211207195204.1582-4-eric.devolder@oracle.com> (raw)
In-Reply-To: <20211207195204.1582-1-eric.devolder@oracle.com>
This change adds members to struct kimage to facilitate crash
hotplug support.
This change also defines crash hotplug events and associated
prototypes.
Signed-off-by: Eric DeVolder <eric.devolder@oracle.com>
---
include/linux/kexec.h | 21 +++++++++++++++++++--
1 file changed, 19 insertions(+), 2 deletions(-)
diff --git a/include/linux/kexec.h b/include/linux/kexec.h
index 0c994ae37729..068f853f1c65 100644
--- a/include/linux/kexec.h
+++ b/include/linux/kexec.h
@@ -221,8 +221,9 @@ struct crash_mem {
extern int crash_exclude_mem_range(struct crash_mem *mem,
unsigned long long mstart,
unsigned long long mend);
-extern int crash_prepare_elf64_headers(struct crash_mem *mem, int kernel_map,
- void **addr, unsigned long *sz);
+extern int crash_prepare_elf64_headers(struct kimage *image,
+ struct crash_mem *mem, int kernel_map,
+ void **addr, unsigned long *sz);
#endif /* CONFIG_KEXEC_FILE */
#ifdef CONFIG_KEXEC_ELF
@@ -299,6 +300,13 @@ struct kimage {
/* Information for loading purgatory */
struct purgatory_info purgatory_info;
+
+#ifdef CONFIG_CRASH_HOTPLUG
+ bool hotplug_event;
+ int offlinecpu;
+ bool elf_index_valid;
+ int elf_index;
+#endif
#endif
#ifdef CONFIG_IMA_KEXEC
@@ -315,6 +323,15 @@ struct kimage {
unsigned long elf_load_addr;
};
+#ifdef CONFIG_CRASH_HOTPLUG
+void arch_crash_hotplug_handler(struct kimage *image,
+ unsigned int hp_action, unsigned long a, unsigned long b);
+#define KEXEC_CRASH_HP_REMOVE_CPU 0
+#define KEXEC_CRASH_HP_ADD_CPU 1
+#define KEXEC_CRASH_HP_REMOVE_MEMORY 2
+#define KEXEC_CRASH_HP_ADD_MEMORY 3
+#endif /* CONFIG_CRASH_HOTPLUG */
+
/* kexec interface functions */
extern void machine_kexec(struct kimage *image);
extern int machine_kexec_prepare(struct kimage *image);
--
2.27.0
next prev parent reply other threads:[~2021-12-07 19:53 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-07 19:51 [RFC v2 0/6] crash: Kernel handling of CPU and memory hot un/plug Eric DeVolder
2021-12-07 19:51 ` [RFC v2 1/6] crash: fix minor typo/bug in debug message Eric DeVolder
2021-12-07 19:52 ` [RFC v2 2/6] crash hp: Introduce CRASH_HOTPLUG configuration options Eric DeVolder
2021-12-07 19:52 ` Eric DeVolder [this message]
2022-01-19 8:23 ` [RFC v2 3/6] crash hp: definitions and prototype changes Baoquan He
2022-01-19 8:25 ` Baoquan He
2021-12-07 19:52 ` [RFC v2 4/6] crash hp: generic crash hotplug support infrastructure Eric DeVolder
2021-12-08 13:38 ` David Hildenbrand
2021-12-09 15:40 ` Eric DeVolder
2021-12-07 19:52 ` [RFC v2 5/6] crash hp: kexec_file changes for crash hotplug support Eric DeVolder
2021-12-07 19:52 ` [RFC v2 6/6] crash hp: Add x86 " Eric DeVolder
2022-01-05 14:25 ` [RFC v2 0/6] crash: Kernel handling of CPU and memory hot un/plug Eric DeVolder
2022-01-10 8:04 ` Baoquan He
2022-01-10 19:59 ` Eric DeVolder
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