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| author | alc <alc@FreeBSD.org> | 2008-06-20 20:59:31 +0000 |
|---|---|---|
| committer | alc <alc@FreeBSD.org> | 2008-06-20 20:59:31 +0000 |
| commit | 8c14570d5e9f0ac2a2e707725b4f7befd41535fd (patch) | |
| tree | 76188da0751a1862a74be9ce53a3f62000d4cae4 | |
| parent | a8c357db8af10a39ad5ba715f7af6bd149f880bd (diff) | |
| download | FreeBSD-src-8c14570d5e9f0ac2a2e707725b4f7befd41535fd.zip FreeBSD-src-8c14570d5e9f0ac2a2e707725b4f7befd41535fd.tar.gz | |
Make preparations for increasing the size of the kernel virtual
address space on the amd64 architecture. The amd64 architecture
requires kernel code and global variables to reside in the highest 2GB
of the 64-bit virtual address space. Thus, KERNBASE cannot change.
However, KERNBASE is sometimes used as the start of the kernel virtual
address space. Henceforth, VM_MIN_KERNEL_ADDRESS should be used
instead. Since KERNBASE and VM_MIN_KERNEL_ADDRESS are still the same
address, there should be no visible effect from this change (yet).
That said, kris@ has tested crash dumps under the full patch that
increases the kernel virtual address space on amd64 to 6GB.
Tested by: kris@
| -rw-r--r-- | sys/amd64/amd64/minidump_machdep.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/sys/amd64/amd64/minidump_machdep.c b/sys/amd64/amd64/minidump_machdep.c index 4c3333d..6775bca 100644 --- a/sys/amd64/amd64/minidump_machdep.c +++ b/sys/amd64/amd64/minidump_machdep.c @@ -206,7 +206,7 @@ minidumpsys(struct dumperinfo *di) /* Walk page table pages, set bits in vm_page_dump */ ptesize = 0; pdp = (uint64_t *)PHYS_TO_DMAP(KPDPphys); - for (va = KERNBASE; va < kernel_vm_end; va += NBPDR) { + for (va = VM_MIN_KERNEL_ADDRESS; va < kernel_vm_end; va += NBPDR) { i = (va >> PDPSHIFT) & ((1ul << NPDPEPGSHIFT) - 1); /* * We always write a page, even if it is zero. Each @@ -278,7 +278,7 @@ minidumpsys(struct dumperinfo *di) mdhdr.msgbufsize = msgbufp->msg_size; mdhdr.bitmapsize = vm_page_dump_size; mdhdr.ptesize = ptesize; - mdhdr.kernbase = KERNBASE; + mdhdr.kernbase = VM_MIN_KERNEL_ADDRESS; mdhdr.dmapbase = DMAP_MIN_ADDRESS; mdhdr.dmapend = DMAP_MAX_ADDRESS; @@ -312,7 +312,7 @@ minidumpsys(struct dumperinfo *di) /* Dump kernel page table pages */ pdp = (uint64_t *)PHYS_TO_DMAP(KPDPphys); - for (va = KERNBASE; va < kernel_vm_end; va += NBPDR) { + for (va = VM_MIN_KERNEL_ADDRESS; va < kernel_vm_end; va += NBPDR) { i = (va >> PDPSHIFT) & ((1ul << NPDPEPGSHIFT) - 1); /* We always write a page, even if it is zero */ if ((pdp[i] & PG_V) == 0) { |
