We encounter the following issue after commit 9cce9c6c2c3b ("arm64: mm: Handle LVA support as a CPU feature"). (gdb) lx-slabinfo Python Exception <class 'gdb.error'>: No symbol "vabits_actual" in current context. Error occurred in Python: No symbol "vabits_actual" in current context. We set vabits_actual based on TCR_EL1 value when VA_BITS is bigger than 48.
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| @@ -48,7 +48,9 @@ class aarch64_page_ops(): · 47 unmodified lines | |||
| 48 | self.VA_BITS = constants.LX_CONFIG_ARM64_VA_BITS | 48 | self.VA_BITS = constants.LX_CONFIG_ARM64_VA_BITS |
| 49 | if self.VA_BITS > 48: | 49 | if self.VA_BITS > 48: |
| 50 | self.VA_BITS_MIN = 48 | 50 | self.VA_BITS_MIN = 48 |
| 51 | self.vabits_actual = gdb.parse_and_eval('vabits_actual') | 51 | tcr_el1 = gdb.execute("info registers $TCR_EL1", to_string=True) |
| 52 | tcr_el1 = int(tcr_el1.split()[1], 16) | ||
| 53 | self.vabits_actual = 64 - ((tcr_el1 >> 16) & 63) | ||
| 52 | else: | 54 | else: |
| 53 | self.VA_BITS_MIN = self.VA_BITS | 55 | self.VA_BITS_MIN = self.VA_BITS |
| 54 | self.vabits_actual = self.VA_BITS | 56 | self.vabits_actual = self.VA_BITS |