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LoongArch: Use physical addresses for CSR_MERRENTRY/CSR_TLBRENTRY

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commit 4e67526840fc55917581b90f6a4b65849a616dd8 upstream.

Now we use virtual addresses to fill CSR_MERRENTRY/CSR_TLBRENTRY, but
hardware hope physical addresses. Now it works well because the high
bits are ignored above PA_BITS (48 bits), but explicitly use physical
addresses can avoid potential bugs. So fix it.

Cc: stable@vger.kernel.org
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Huacai Chen
2025-11-09 16:02:00 +08:00
committed by Greg Kroah-Hartman
parent 2612f0e0b8
commit ca9f11fe09
1 changed files with 2 additions and 2 deletions
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4
arch/loongarch/kernel/traps.c
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@@ -1097,8 +1097,8 @@ static void configure_exception_vector(void)
tlbrentry = (unsigned long)exception_handlers + 80*VECSIZE;
csr_write64(eentry, LOONGARCH_CSR_EENTRY);
csr_write64(eentry, LOONGARCH_CSR_MERRENTRY);
csr_write64(tlbrentry, LOONGARCH_CSR_TLBRENTRY);
csr_write64(__pa(eentry), LOONGARCH_CSR_MERRENTRY);
csr_write64(__pa(tlbrentry), LOONGARCH_CSR_TLBRENTRY);
}
void per_cpu_trap_init(int cpu)