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Message-Id: <20210609004419.936873-14-pasha.tatashin@soleen.com>
Date: Tue, 8 Jun 2021 20:44:17 -0400
From: Pavel Tatashin <pasha.tatashin@...een.com>
To: pasha.tatashin@...een.com, jmorris@...ei.org, sashal@...nel.org,
ebiederm@...ssion.com, kexec@...ts.infradead.org,
linux-kernel@...r.kernel.org, corbet@....net,
catalin.marinas@....com, will@...nel.org,
linux-arm-kernel@...ts.infradead.org, maz@...nel.org,
james.morse@....com, vladimir.murzin@....com,
matthias.bgg@...il.com, linux-mm@...ck.org, mark.rutland@....com,
steve.capper@....com, rfontana@...hat.com, tglx@...utronix.de,
selindag@...il.com, tyhicks@...ux.microsoft.com,
kernelfans@...il.com, akpm@...ux-foundation.org,
madvenka@...ux.microsoft.com
Subject: [PATCH v15 13/15] arm64: kexec: remove the pre-kexec PoC maintenance
Now that kexec does its relocations with the MMU enabled, we no longer
need to clean the relocation data to the PoC.
Suggested-by: James Morse <james.morse@....com>
Signed-off-by: Pavel Tatashin <pasha.tatashin@...een.com>
---
arch/arm64/kernel/machine_kexec.c | 40 -------------------------------
1 file changed, 40 deletions(-)
diff --git a/arch/arm64/kernel/machine_kexec.c b/arch/arm64/kernel/machine_kexec.c
index a2163ea24fc1..8f8962f53ba2 100644
--- a/arch/arm64/kernel/machine_kexec.c
+++ b/arch/arm64/kernel/machine_kexec.c
@@ -76,45 +76,6 @@ int machine_kexec_prepare(struct kimage *kimage)
return 0;
}
-/**
- * kexec_list_flush - Helper to flush the kimage list and source pages to PoC.
- */
-static void kexec_list_flush(struct kimage *kimage)
-{
- kimage_entry_t *entry;
-
- __flush_dcache_area(kimage, sizeof(*kimage));
-
- for (entry = &kimage->head; ; entry++) {
- unsigned int flag;
- void *addr;
-
- /* flush the list entries. */
- __flush_dcache_area(entry, sizeof(kimage_entry_t));
-
- flag = *entry & IND_FLAGS;
- if (flag == IND_DONE)
- break;
-
- addr = phys_to_virt(*entry & PAGE_MASK);
-
- switch (flag) {
- case IND_INDIRECTION:
- /* Set entry point just before the new list page. */
- entry = (kimage_entry_t *)addr - 1;
- break;
- case IND_SOURCE:
- /* flush the source pages. */
- __flush_dcache_area(addr, PAGE_SIZE);
- break;
- case IND_DESTINATION:
- break;
- default:
- BUG();
- }
- }
-}
-
/**
* kexec_segment_flush - Helper to flush the kimage segments to PoC.
*/
@@ -200,7 +161,6 @@ int machine_kexec_post_load(struct kimage *kimage)
__flush_dcache_area(reloc_code, reloc_size);
flush_icache_range((uintptr_t)reloc_code, (uintptr_t)reloc_code +
reloc_size);
- kexec_list_flush(kimage);
kexec_image_info(kimage);
return 0;
--
2.25.1
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