38 lines
1.2 KiB
Diff
38 lines
1.2 KiB
Diff
From 69786ee12c4842d2cbd39ea42df65c45fb043edd Mon Sep 17 00:00:00 2001
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From: Pavankumar Kondeti <quic_pkondeti@quicinc.com>
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Date: Thu, 8 Dec 2022 09:55:07 +0530
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Subject: [PATCH 47/89] arm64: handle vabits_actual symbol missing case
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After kernel commit 0d9b1ffefabe ("arm64: mm: make vabits_actual
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a build time constant if possible") introduced in Linux v5.19,
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the crash will not find vabits_actual symbol if VA_BITS <= 48.
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Add a fallback option to initialize VA_BITS based on the user
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supplied machdep option.
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Tested ramdumps loading in both 6.0 and 5.15 kernels.
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Signed-off-by: Pavankumar Kondeti <quic_pkondeti@quicinc.com>
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Signed-off-by: Lianbo Jiang <lijiang@redhat.com>
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---
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arm64.c | 4 ++++
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1 file changed, 4 insertions(+)
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diff --git a/arm64.c b/arm64.c
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index 7e8a7db1fcc4..56fb841f43f8 100644
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--- a/arm64.c
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+++ b/arm64.c
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@@ -4671,6 +4671,10 @@ arm64_calc_VA_BITS(void)
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return;
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} else if (arm64_set_va_bits_by_tcr()) {
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return;
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+ } else if (machdep->machspec->VA_BITS_ACTUAL) {
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+ machdep->machspec->VA_BITS = machdep->machspec->VA_BITS_ACTUAL;
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+ machdep->machspec->VA_START = _VA_START(machdep->machspec->VA_BITS_ACTUAL);
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+ return;
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}
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if (!(sp = symbol_search("swapper_pg_dir")) &&
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--
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2.37.1
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