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From: Pingfan Liu <kernelfans@gmail.com>
To: kexec@lists.infradead.org
Cc: Pingfan Liu <piliu@redhat.com>, Jiri Bohac <jbohac@suse.cz>,
	Michal Hocko <mhocko@suse.com>, Philipp Rudo <prudo@redhat.com>,
	Baoquan He <bhe@redhat.com>, Dave Young <dyoung@redhat.com>
Subject: [RFC 2/3] of: kexec: Set up properties for reusing CMA in kdump
Date: Mon, 18 Dec 2023 13:23:24 +0800	[thread overview]
Message-ID: <20231218052325.20982-3-kernelfans@gmail.com> (raw)
In-Reply-To: <20231218052325.20982-1-kernelfans@gmail.com>

From: Pingfan Liu <piliu@redhat.com>

Signed-off-by: Pingfan Liu <piliu@redhat.com>
Cc: Jiri Bohac <jbohac@suse.cz>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Philipp Rudo <prudo@redhat.com>
Cc: Baoquan He <bhe@redhat.com>
Cc: Dave Young <dyoung@redhat.com>
To: kexec@lists.infradead.org
---
 drivers/of/kexec.c    | 14 ++++++++++++++
 include/linux/kexec.h |  4 ++++
 2 files changed, 18 insertions(+)

diff --git a/drivers/of/kexec.c b/drivers/of/kexec.c
index 68278340cecf..471b6cdf34ff 100644
--- a/drivers/of/kexec.c
+++ b/drivers/of/kexec.c
@@ -410,6 +410,20 @@ void *of_kexec_alloc_and_setup_fdt(const struct kimage *image,
 			if (ret)
 				goto out;
 		}
+
+		ret = fdt_appendprop_u64(fdt, chosen_node,
+				"kdump,cma_pfn", kdump_cma_pfn);
+		if (ret)
+			goto out;
+		ret = fdt_appendprop_u64(fdt, chosen_node,
+				"kdump,cma_pg_cnt", kdump_cma_pg_cnt);
+		if (ret)
+			goto out;
+		ret = fdt_appendprop_u64(fdt, chosen_node,
+				"kdump,cma_pg_paddr", kdump_cma_pg_paddr);
+		if (ret)
+			goto out;
+
 	}
 
 	/* add bootargs */
diff --git a/include/linux/kexec.h b/include/linux/kexec.h
index 95e19c814c93..bf2d8b9d8c07 100644
--- a/include/linux/kexec.h
+++ b/include/linux/kexec.h
@@ -408,6 +408,10 @@ bool kexec_load_permitted(int kexec_image_type);
 /* flag to track if kexec reboot is in progress */
 extern bool kexec_in_progress;
 
+extern u64 kdump_cma_pfn;
+extern u64 kdump_cma_pg_cnt;
+extern u64 kdump_cma_pg_paddr;
+
 int crash_shrink_memory(unsigned long new_size);
 ssize_t crash_get_memory_size(void);
 void kdump_kernel_reuse_mem(void);
-- 
2.31.1


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  parent reply	other threads:[~2023-12-18  5:23 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-12-18  5:23 [RFC 0/3] kdump: Check mem_map of CMA area in kdump Pingfan Liu
2023-12-18  5:23 ` [RFC 1/3] crash_dump: Parse the CMA's mem_map " Pingfan Liu
2023-12-18  5:23 ` Pingfan Liu [this message]
2023-12-18  5:23 ` [RFC 3/3] of: fdt: Parse properties of reusing CMA " Pingfan Liu
2023-12-18 15:19 ` [RFC 0/3] kdump: Check mem_map of CMA area " Michal Hocko
2023-12-19 15:20 ` Philipp Rudo

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