powerpc/603: Inconditionally use task PGDIR in ITLB misses

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Now that modules exec page tables are preallocated, the instruction
TLBmiss handler can use task PGDIR inconditionally.

Also revise the identification of user vs kernel user space by doing
a calculation instead of a comparison: Get the segment number and
subtract the number of the first kernel segment. The result is
positive for kernel addresses and negative for user addresses,
which means that upper 2 bits are 0 for kernel and 3 for user.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/9a3242162ad2faab8019c698e501b326a126ee9e.1724173828.git.christophe.leroy@csgroup.eu

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Christophe Leroy 2024-08-20 19:23:57 +02:00 • committed by Michael Ellerman

parent 31c0e137ec

commit 3f57d90c23

1 changed files with 5 additions and 12 deletions

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arch/powerpc/kernel/head_book3s_32.S

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