mirror of https://gitee.com/openkylin/linux.git
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When emulating TLB miss / invalid exceptions during CACHE instruction emulation, be sure to set up the correct PC and host_cp0_badvaddr state for the kvm_mips_emlulate_tlb*_ld() function to pick up for guest EPC and BadVAddr. PC needs to be rewound otherwise the guest EPC will end up pointing at the next instruction after the faulting CACHE instruction. host_cp0_badvaddr must be set because guest CACHE instructions trap with a Coprocessor Unusable exception, which doesn't update the host BadVAddr as a TLB exception would. This doesn't tend to get hit when dynamic translation of emulated instructions is enabled, since only the first execution of each CACHE instruction actually goes through this code path, with subsequent executions hitting the SYNCI instruction that it gets replaced with. Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: kvm@vger.kernel.org Cc: linux-mips@linux-mips.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> |
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| .. | ||
| 00README.txt | ||
| Kconfig | ||
| Makefile | ||
| callback.c | ||
| commpage.c | ||
| commpage.h | ||
| dyntrans.c | ||
| emulate.c | ||
| fpu.S | ||
| interrupt.c | ||
| interrupt.h | ||
| locore.S | ||
| mips.c | ||
| msa.S | ||
| stats.c | ||
| tlb.c | ||
| trace.h | ||
| trap_emul.c | ||