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linux/arch/powerpc/kvm
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Paul Mackerras 1c9e3d51d5 KVM: PPC: Book3S HV: Handle unexpected traps in guest entry/exit code better 
As we saw with the TM Bad Thing type of program interrupt occurring
on the hrfid that enters the guest, it is not completely impossible
to have a trap occurring in the guest entry/exit code, despite the
fact that the code has been written to avoid taking any traps.

This adds a check in the kvmppc_handle_exit_hv() function to detect
the case when a trap has occurred in the hypervisor-mode code, and
instead of treating it just like a trap in guest code, we now print
a message and return to userspace with a KVM_EXIT_INTERNAL_ERROR
exit reason.

Of the various interrupts that get handled in the assembly code in
the guest exit path and that can return directly to the guest, the
only one that can occur when MSR.HV=1 and MSR.EE=0 is machine check
(other than system call, which we can avoid just by not doing a sc
instruction).  Therefore this adds code to the machine check path to
ensure that if the MCE occurred in hypervisor mode, we exit to the
host rather than trying to continue the guest.

Signed-off-by: Paul Mackerras <paulus@samba.org>
2015-12-09 15:46:14 +11:00
..
book3s_32_mmu_host.c KVM: PPC: Fix warnings from sparse 2015-08-22 11:16:16 +02:00
book3s_32_mmu.c arch: powerpc: kvm: book3s_32_mmu.c: Remove unused function 2014-12-17 13:12:25 +01:00
book3s_32_sr.S KVM: PPC: book3s_pr: Simplify transitions between virtual and real mode 2011-09-25 19:52:29 +03:00
book3s_64_mmu_host.c KVM: PPC: Fix warnings from sparse 2015-08-22 11:16:16 +02:00
book3s_64_mmu_hv.c powerpc updates for 4.4 2015-11-05 23:38:43 -08:00
book3s_64_mmu.c KVM: PPC: Disable NX for old magic page using guests 2014-05-30 14:26:24 +02:00
book3s_64_slb.S KVM: PPC: Book3S PR: Rework SLB switching code 2014-05-30 14:26:30 +02:00
book3s_64_vio_hv.c KVM: PPC: Book3S: Introduce hypervisor call H_GET_TCE 2014-03-26 23:34:27 +11:00
book3s_64_vio.c ppc: kvm: use anon_inode_getfd() with O_CLOEXEC flag 2013-08-26 13:19:56 +03:00
book3s_emulate.c KVM: PPC: Fix warnings from sparse 2015-08-22 11:16:16 +02:00
book3s_exports.c KVM: PPC: Make shared struct aka magic page guest endian 2014-05-30 14:26:21 +02:00
book3s_hv_builtin.c KVM: PPC: Book3S HV: Implement dynamic micro-threading on POWER8 2015-08-22 11:16:17 +02:00
book3s_hv_interrupts.S powerpc/kvm: Create proper names for the kvm_host_state PMU fields 2014-12-29 15:45:55 +11:00
book3s_hv_ras.c powerpc/book3s: Fix flush_tlb cpu_spec hook to take a generic argument. 2015-03-17 07:52:48 +11:00
book3s_hv_rm_mmu.c powerpc updates for 4.4 2015-11-05 23:38:43 -08:00
book3s_hv_rm_xics.c KVM: PPC: Book3S HV: Make use of unused threads when running guests 2015-08-22 11:16:17 +02:00
book3s_hv_rmhandlers.S KVM: PPC: Book3S HV: Handle unexpected traps in guest entry/exit code better 2015-12-09 15:46:14 +11:00
book3s_hv.c KVM: PPC: Book3S HV: Handle unexpected traps in guest entry/exit code better 2015-12-09 15:46:14 +11:00
book3s_interrupts.S KVM: PPC: Book3S PR: Fix ABIv2 on LE 2014-07-28 15:22:15 +02:00
book3s_mmu_hpte.c kvm: powerpc: book3s: pr: move PR related tracepoints to a separate header 2013-10-17 15:36:22 +02:00
book3s_paired_singles.c KVM: PPC: Fix warnings from sparse 2015-08-22 11:16:16 +02:00
book3s_pr_papr.c kvmppc: Implement H_LOGICAL_CI_{LOAD,STORE} in KVM 2015-04-21 15:21:28 +02:00
book3s_pr.c KVM: powerpc: kvmppc_visible_gpa can be boolean 2015-11-25 17:24:24 +01:00
book3s_rmhandlers.S KVM: PPC: Book3S PR: Fix ABIv2 on LE 2014-07-28 15:22:15 +02:00
book3s_rtas.c KVM: PPC: RTAS: Do byte swaps explicitly 2014-07-07 23:17:20 +02:00
book3s_segment.S KVM: PPC: Book3S: correct width in XER handling 2015-08-22 11:16:19 +02:00
book3s_xics.c KVM: PPC: Book3S: Fix typo in top comment about locking 2015-09-04 07:28:05 +10:00
book3s_xics.h KVM: PPC: Book3S HV: Add ICP real mode counters 2015-04-21 15:21:30 +02:00
book3s.c KVM: PPC: Book3S: Take the kvm->srcu lock in kvmppc_h_logical_ci_load/store() 2015-09-21 09:05:15 +10:00
book3s.h kvm: Fix page ageing bugs 2014-09-24 14:07:58 +02:00
booke_emulate.c KVM: PPC: BOOKE: Emulate debug registers and exception 2014-09-22 10:11:33 +02:00
booke_interrupts.S KVM: PPC: Remove 440 support 2014-07-28 15:23:15 +02:00
booke.c KVM: add halt_attempted_poll to VCPU stats 2015-09-16 12:17:00 +02:00
booke.h KVM: PPC: Book3e: Add AltiVec support 2014-09-22 10:11:32 +02:00
bookehv_interrupts.S powerpc/kvm: common sw breakpoint instr across ppc 2014-09-22 10:11:36 +02:00
e500_emulate.c KVM: PPC: e500: Emulate TMCFG0 TMRN register 2015-10-15 15:58:16 +11:00
e500_mmu_host.c powerpc updates for 4.4 2015-11-05 23:38:43 -08:00
e500_mmu_host.h KVM: PPC: E500: Make clear_tlb_refs and clear_tlb1_bitmap static 2013-01-24 19:23:33 +01:00
e500_mmu.c KVM: PPC: fix suspicious use of conditional operator 2015-08-22 11:16:16 +02:00
e500.c KVM: PPC: e500: fix handling local_sid_lookup result 2015-10-15 15:58:16 +11:00
e500.h KVM: PPC: e500mc: Add support for single threaded vcpus on e6500 core 2014-09-22 10:11:35 +02:00
e500mc.c powerpc: Replace __get_cpu_var uses 2014-11-03 12:12:32 +11:00
emulate_loadstore.c KVM: PPC: Pass enum to kvmppc_get_last_inst 2014-09-22 10:11:36 +02:00
emulate.c KVM: PPC: Pass enum to kvmppc_get_last_inst 2014-09-22 10:11:36 +02:00
fpu.S
irq.h KVM: PPC: Book3S: Add API for in-kernel XICS emulation 2013-05-02 15:28:36 +02:00
Kconfig KVM: PPC: Remove PPC970 from KVM_BOOK3S_64_HV text in Kconfig 2015-08-22 11:16:16 +02:00
Makefile Here are the PPC and ARM changes for KVM, which I separated because 2014-08-07 11:35:30 -07:00
mpic.c kvm/ppc/mpic: drop unused IRQ_testbit 2015-04-08 10:46:58 +02:00
powerpc.c KVM: PPC: Implement extension to report number of memslots 2015-10-21 16:31:46 +11:00
timing.c KVM: PPC: Remove DCR handling 2014-07-28 19:29:15 +02:00
timing.h KVM: PPC: Remove DCR handling 2014-07-28 19:29:15 +02:00
trace_book3s.h KVM: PPC: Book3S HV: Tracepoints for KVM HV guest interactions 2014-12-17 13:29:27 +01:00
trace_booke.h KVM: PPC: BookE: Improve irq inject tracepoint 2014-12-15 13:27:23 +01:00
trace_hv.h KVM: PPC: Book3S HV: Tracepoints for KVM HV guest interactions 2014-12-17 13:29:27 +01:00
trace_pr.h KVM: PPC: Book3S HV: Tracepoints for KVM HV guest interactions 2014-12-17 13:29:27 +01:00
trace.h kvm: powerpc: booke: Move booke related tracepoints to separate header 2013-10-17 15:37:16 +02:00