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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 v1 6/8] crash hp: Add x86 crash hotplug state items to kimage
Date: Thu, 18 Nov 2021 12:49:46 -0500	[thread overview]
Message-ID: <20211118174948.37435-7-eric.devolder@oracle.com> (raw)
In-Reply-To: <20211118174948.37435-1-eric.devolder@oracle.com>

To facilitate hotplug updates of the crash elfcorehdr, a few members
are added to the kimage arch struct.

The indices of the elfcorehdr and purgatory segments are recorded
here so that upon a hotplug event, those segments can be efficiently
located and updated accordingly.

The purgatory image also requires a few register context values in
order to transition from purgatory to the next/capture kernel.

Signed-off-by: Eric DeVolder <eric.devolder@oracle.com>
---
 arch/x86/include/asm/kexec.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/arch/x86/include/asm/kexec.h b/arch/x86/include/asm/kexec.h
index 11b7c06e2828..b08fe56239c8 100644
--- a/arch/x86/include/asm/kexec.h
+++ b/arch/x86/include/asm/kexec.h
@@ -150,6 +150,16 @@ struct kimage_arch {
 	pud_t *pud;
 	pmd_t *pmd;
 	pte_t *pte;
+#ifdef CONFIG_CRASH_HOTPLUG
+	struct {
+		int elf_index;
+		int purg_index;
+		unsigned long rbx;
+		unsigned long rsi;
+		unsigned long rip;
+		unsigned long rsp;
+	} hp;
+#endif
 };
 #endif /* CONFIG_X86_32 */
 
-- 
2.27.0


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WARNING: multiple messages have this Message-ID (diff)
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 v1 6/8] crash hp: Add x86 crash hotplug state items to kimage
Date: Thu, 18 Nov 2021 12:49:46 -0500	[thread overview]
Message-ID: <20211118174948.37435-7-eric.devolder@oracle.com> (raw)
In-Reply-To: <20211118174948.37435-1-eric.devolder@oracle.com>

To facilitate hotplug updates of the crash elfcorehdr, a few members
are added to the kimage arch struct.

The indices of the elfcorehdr and purgatory segments are recorded
here so that upon a hotplug event, those segments can be efficiently
located and updated accordingly.

The purgatory image also requires a few register context values in
order to transition from purgatory to the next/capture kernel.

Signed-off-by: Eric DeVolder <eric.devolder@oracle.com>
---
 arch/x86/include/asm/kexec.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/arch/x86/include/asm/kexec.h b/arch/x86/include/asm/kexec.h
index 11b7c06e2828..b08fe56239c8 100644
--- a/arch/x86/include/asm/kexec.h
+++ b/arch/x86/include/asm/kexec.h
@@ -150,6 +150,16 @@ struct kimage_arch {
 	pud_t *pud;
 	pmd_t *pmd;
 	pte_t *pte;
+#ifdef CONFIG_CRASH_HOTPLUG
+	struct {
+		int elf_index;
+		int purg_index;
+		unsigned long rbx;
+		unsigned long rsi;
+		unsigned long rip;
+		unsigned long rsp;
+	} hp;
+#endif
 };
 #endif /* CONFIG_X86_32 */
 
-- 
2.27.0


  parent reply	other threads:[~2021-11-18 17:50 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-18 17:49 [RFC v1 0/8] RFC v1: Kernel handling of CPU and memory hot un/plug for crash Eric DeVolder
2021-11-18 17:49 ` Eric DeVolder
2021-11-18 17:49 ` [RFC v1 1/8] crash: fix minor typo/bug in debug message Eric DeVolder
2021-11-18 17:49   ` Eric DeVolder
2021-11-24  1:17   ` Baoquan He
2021-11-24  1:17     ` Baoquan He
2021-11-18 17:49 ` [RFC v1 2/8] crash hp: Introduce CRASH_HOTPLUG configuration options Eric DeVolder
2021-11-18 17:49   ` Eric DeVolder
2021-11-18 17:49 ` [RFC v1 3/8] crash hp: definitions and prototypes for crash hotplug support Eric DeVolder
2021-11-18 17:49   ` Eric DeVolder
2021-11-18 17:49 ` [RFC v1 4/8] crash hp: generic crash hotplug support infrastructure Eric DeVolder
2021-11-18 17:49   ` Eric DeVolder
2021-11-18 17:49 ` [RFC v1 5/8] crash hp: kexec_file changes for use by crash hotplug handler Eric DeVolder
2021-11-18 17:49   ` Eric DeVolder
2021-11-18 17:49 ` Eric DeVolder [this message]
2021-11-18 17:49   ` [RFC v1 6/8] crash hp: Add x86 crash hotplug state items to kimage Eric DeVolder
2021-11-18 17:49 ` [RFC v1 7/8] crash hp: Add x86 crash hotplug support for kexec_file_load Eric DeVolder
2021-11-18 17:49   ` Eric DeVolder
2021-11-18 17:49 ` [RFC v1 8/8] crash hp: Add x86 crash hotplug support for bzImage Eric DeVolder
2021-11-18 17:49   ` Eric DeVolder
2021-11-19  2:37 ` [RFC v1 0/8] RFC v1: Kernel handling of CPU and memory hot un/plug for crash Baoquan He
2021-11-19  2:37   ` Baoquan He
2021-11-24  9:02 ` Baoquan He
2021-11-24  9:02   ` Baoquan He
2021-11-29 19:42   ` Eric DeVolder
2021-11-29 19:42     ` Eric DeVolder
2021-12-01 12:59     ` Baoquan He
2021-12-01 12:59       ` Baoquan He
2021-12-07 20:04       ` Eric DeVolder
2021-12-07 20:04         ` Eric DeVolder
2021-11-29  8:45 ` Sourabh Jain
2021-11-29  8:45   ` Sourabh Jain
2021-11-29 20:00   ` Eric DeVolder
2021-11-29 20:00     ` Eric DeVolder

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