[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[PATCH 5/8] kern/ieee1275/init: ppc64: Add support for alignment require
From: |
Stefan Berger |
Subject: |
[PATCH 5/8] kern/ieee1275/init: ppc64: Add support for alignment requirements |
Date: |
Fri, 27 Oct 2023 10:14:08 -0400 |
Add support for memory alignment requirements and adjust a candidate
address to it before checking whether the block is large enough since
the alignment adjustment can make a block smaller than what was
requested.
Signed-off-by: stefan Berger <stefanb@linux.ibm.com>
Cc: Hari Bathini <hbathini@linux.ibm.com>
Cc: Pavithra Prakash <pavrampu@in.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Carolyn Scherrer <cpscherr@us.ibm.com>
Cc: Mahesh Salgaonkar <mahesh@linux.ibm.com>
Cc: Sourabh Jain <sourabhjain@linux.ibm.com>
---
grub-core/kern/ieee1275/init.c | 10 ++++++++++
include/grub/powerpc/ieee1275/alloc.h | 1 +
2 files changed, 11 insertions(+)
diff --git a/grub-core/kern/ieee1275/init.c b/grub-core/kern/ieee1275/init.c
index a0ce9d55e..5414f659c 100644
--- a/grub-core/kern/ieee1275/init.c
+++ b/grub-core/kern/ieee1275/init.c
@@ -506,6 +506,16 @@ regions_claim (grub_uint64_t addr, grub_uint64_t len,
grub_memory_type_t type,
}
}
}
+
+ /* Honor alignment restrictions on candidate addr */
+ if (rcr->align)
+ {
+ grub_uint64_t align_addr = ALIGN_UP (addr, rcr->align);
+
+ len = len - (align_addr - addr);
+ addr = align_addr;
+ }
+
if (rcr->flags & GRUB_MM_ADD_REGION_CONSECUTIVE && len < rcr->total)
return 0;
diff --git a/include/grub/powerpc/ieee1275/alloc.h
b/include/grub/powerpc/ieee1275/alloc.h
index 136e1df0b..b3d14f095 100644
--- a/include/grub/powerpc/ieee1275/alloc.h
+++ b/include/grub/powerpc/ieee1275/alloc.h
@@ -11,6 +11,7 @@ struct regions_claim_request {
bool init_region; /* whether to init the region */
grub_uint64_t addr; /* result address */
grub_uint64_t len; /* number of bytes allocated */
+ grub_size_t align; /* alignment restrictions */
};
#endif /* GRUB_POWERPC_IEEE1275_ALLOC_HEADER */
--
2.25.1
- [PATCH 0/8] ppc64: Restrict memory allocations for kernel and initrd, Stefan Berger, 2023/10/27
- [PATCH 6/8] kern/ieee1275/init: ppc64: Implement alloc_mem_restricted, Stefan Berger, 2023/10/27
- [PATCH 8/8] debug: Display successful memory claims, Stefan Berger, 2023/10/27
- [PATCH 7/8] loader/powerpc/ieee1275: Use new allocation function for kernel and initrd, Stefan Berger, 2023/10/27
- [PATCH 2/8] kern/ieee1275/init: ppc64: Decide by request whether to initialize region, Stefan Berger, 2023/10/27
- [PATCH 1/8] kern/ieee1275/init: ppc64: Introduce a request for regions_claim, Stefan Berger, 2023/10/27
- [PATCH 3/8] kern/ieee1275/init: ppc64: Return allocated address and len using context, Stefan Berger, 2023/10/27
- [PATCH 4/8] kern/ieee1275/init: ppc64: Check early for sufficiently large chunk, Stefan Berger, 2023/10/27
- [PATCH 5/8] kern/ieee1275/init: ppc64: Add support for alignment requirements,
Stefan Berger <=
- Re: [PATCH 0/8] ppc64: Restrict memory allocations for kernel and initrd, Daniel Kiper, 2023/10/31