30 lines
1.2 KiB
Diff
30 lines
1.2 KiB
Diff
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commit ac5a7889d31bb37aa0687110ecea08837f8a66a8
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Author: Dave Anderson <anderson@redhat.com>
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Date: Fri Feb 8 10:48:30 2019 -0500
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Support for configurable CONFIG_ARM64_PA_BITS values introduced
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in kernel commit 982aa7c5f0861bf56b2412ca341a13f44c238ba4, titled
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"arm64: add kconfig symbol to configure physical address size".
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Without the patch, it is impossible to determine the value of
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CONFIG_ARM64_PA_BITS, and will require a new MAX_PHYSMEM_BITS
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vmcoreinfo entry to be exported. This patch reads that entry
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during intitialization.
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(anderson@redhat.com)
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diff --git a/arm64.c b/arm64.c
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index 2308612..b4d9b13 100644
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--- a/arm64.c
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+++ b/arm64.c
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@@ -362,7 +362,10 @@ arm64_init(int when)
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arm64_calc_virtual_memory_ranges();
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machdep->section_size_bits = _SECTION_SIZE_BITS;
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if (!machdep->max_physmem_bits) {
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- if (machdep->machspec->VA_BITS == 52) /* guess */
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+ if ((string = pc->read_vmcoreinfo("NUMBER(MAX_PHYSMEM_BITS)"))) {
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+ machdep->max_physmem_bits = atol(string);
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+ free(string);
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+ } else if (machdep->machspec->VA_BITS == 52) /* guess */
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machdep->max_physmem_bits = _MAX_PHYSMEM_BITS_52;
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else if (THIS_KERNEL_VERSION >= LINUX(3,17,0))
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machdep->max_physmem_bits = _MAX_PHYSMEM_BITS_3_17;
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