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cda4a14733
linux-next/arch/powerpc/kvm
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Paul Mackerras cda4a14733 KVM: PPC: Book3S HV: Fix duplication of host SLB entries 
Since commit 6964e6a4e4 ("KVM: PPC: Book3S HV: Do SLB load/unload
with guest LPCR value loaded", 2018-01-11), we have been seeing
occasional machine check interrupts on POWER8 systems when running
KVM guests, due to SLB multihit errors.

This turns out to be due to the guest exit code reloading the host
SLB entries from the SLB shadow buffer when the SLB was not previously
cleared in the guest entry path.  This can happen because the path
which skips from the guest entry code to the guest exit code without
entering the guest now does the skip before the SLB is cleared and
loaded with guest values, but the host values are loaded after the
point in the guest exit path that we skip to.

To fix this, we move the code that reloads the host SLB values up
so that it occurs just before the point in the guest exit code (the
label guest_bypass:) where we skip to from the guest entry path.

Reported-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Fixes: 6964e6a4e4 ("KVM: PPC: Book3S HV: Do SLB load/unload with guest LPCR value loaded")
Tested-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
2018-03-23 13:42:51 +11:00
..
book3s_32_mmu_host.c powerpc/mm: Move hash related mmu-*.h headers to book3s/ 2016-03-03 21:19:21 +11:00
book3s_32_mmu.c KVM: PPC: Book3S PR: Ratelimit copy data failure error messages 2017-02-17 14:03:35 +11:00
book3s_32_sr.S
book3s_64_mmu_host.c * ARM: HYP mode stub supports kexec/kdump on 32-bit; improved PMU 2017-05-08 12:37:56 -07:00
book3s_64_mmu_hv.c Second PPC KVM update for 4.16 2018-02-09 22:03:06 +01:00
book3s_64_mmu_radix.c KVM: PPC: Book3S HV: Fix handling of large pages in radix page fault handler 2018-03-02 14:05:32 +11:00
book3s_64_mmu.c KVM: PPC: Book3S PR: Fix WIMG handling under pHyp 2018-01-10 20:45:00 +11:00
book3s_64_slb.S KVM: PPC: Book3S: Fix gas warning due to using r0 as immediate 0 2017-11-01 15:17:25 +11:00
book3s_64_vio_hv.c powerpc/mm: Rename find_linux_pte_or_hugepte() 2017-08-17 23:13:46 +10:00
book3s_64_vio.c KVM: PPC: Book3S: Protect kvmppc_gpa_to_ua() with SRCU 2017-10-14 11:35:41 +11:00
book3s_emulate.c KVM: PPC: Book3S PR: Do not fail emulation with mtspr/mfspr for unknown SPRs 2017-04-20 11:39:32 +10:00
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: Run HPT guests on POWER9 radix hosts 2017-11-01 15:36:41 +11:00
book3s_hv_hmi.c powerpc: move hmi.c to arch/powerpc/kvm/ 2016-09-09 16:18:07 +10:00
book3s_hv_interrupts.S KVM: PPC: Book3S HV: Close race with testing for signals on guest entry 2017-07-01 18:59:38 +10:00
book3s_hv_ras.c Merge branch 'topic/ppc-kvm' into next 2018-01-21 22:43:43 +11:00
book3s_hv_rm_mmu.c powerpc/mm: Remove unused flag arg in global_invalidates 2018-01-21 20:30:44 +11:00
book3s_hv_rm_xics.c Merge branch 'kvm-ppc-next' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc into HEAD 2017-05-09 11:50:01 +02:00
book3s_hv_rm_xive.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
book3s_hv_rmhandlers.S KVM: PPC: Book3S HV: Fix duplication of host SLB entries 2018-03-23 13:42:51 +11:00
book3s_hv.c KVM: PPC: Book3S HV: Fix guest time accounting with VIRT_CPU_ACCOUNTING_GEN 2018-03-03 19:28:34 +11:00
book3s_interrupts.S KVM: PPC: Book3S PR: Fix svcpu copying with preemption enabled 2018-02-01 13:35:33 +11:00
book3s_mmu_hpte.c sched/headers: Prepare to use <linux/rcuupdate.h> instead of <linux/rculist.h> in <linux/sched.h> 2017-03-02 08:42:38 +01:00
book3s_paired_singles.c powerpc: Create disable_kernel_{fp,altivec,vsx,spe}() 2015-12-01 13:52:25 +11:00
book3s_pr_papr.c KVM: PPC: Book3S PR: Enable in-kernel TCE handlers for PR KVM 2017-10-14 16:38:19 +11:00
book3s_pr.c Second PPC KVM update for 4.16 2018-02-09 22:03:06 +01:00
book3s_rmhandlers.S powerpc/64s: Simple RFI macro conversions 2018-01-10 03:07:30 +11:00
book3s_rtas.c KVM: PPC: Book3S HV: Native usage of the XIVE interrupt controller 2017-04-27 21:37:29 +10:00
book3s_segment.S powerpc/64s: Simple RFI macro conversions 2018-01-10 03:07:30 +11:00
book3s_xics.c powerpc: Use octal numbers for file permissions 2018-01-22 05:48:33 +11:00
book3s_xics.h KVM: PPC: Book3S HV: Native usage of the XIVE interrupt controller 2017-04-27 21:37:29 +10:00
book3s_xive_template.c KVM: PPC: Book3S HV: Don't access XIVE PIPR register using byte accesses 2017-09-12 16:02:07 +10:00
book3s_xive.c treewide/trivial: Remove ';;$' typo noise 2018-02-22 10:59:33 +01:00
book3s_xive.h KVM: PPC: Book3S HV: Enable use of the new XIVE "single escalation" feature 2018-01-19 12:10:21 +11:00
book3s.c KVM: Move vcpu_load to arch-specific kvm_arch_vcpu_ioctl_set_guest_debug 2017-12-14 09:26:56 +01:00
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: Move vcpu_load to arch-specific kvm_arch_vcpu_ioctl_set_guest_debug 2017-12-14 09:26:56 +01:00
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 KVM: PPC: BookE: Use vma_pages function 2017-10-14 13:39:49 +11:00
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: e500: Rename jump labels in kvmppc_e500_tlb_init() 2016-09-13 14:32:47 +10:00
e500.c KVM: PPC: e500: Fix some NULL dereferences on error 2017-08-31 12:36:44 +10:00
e500.h kvm: rename pfn_t to kvm_pfn_t 2016-01-15 17:56:32 -08:00
e500mc.c KVM: PPC: e500mc: Fix a NULL dereference 2017-08-31 12:36:44 +10:00
emulate_loadstore.c KVM: PPC: Book3S: Add MMIO emulation for VMX instructions 2018-02-09 16:51:51 +11:00
emulate.c KVM: PPC: Book3S HV: Enable guests to use large decrementer mode on POWER9 2017-06-19 14:02:04 +10:00
fpu.S
irq.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
Kconfig Second PPC KVM update for 4.16 2018-02-09 22:03:06 +01:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mpic.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
powerpc.c KVM: PPC: Book3S: Fix compile error that occurs with some gcc versions 2018-02-13 15:45:21 +11:00
timing.c KVM: PPC: Use seq_puts() in kvmppc_exit_timing_show() 2018-01-11 20:36:06 +11:00
timing.h KVM: PPC: Remove DCR handling 2014-07-28 19:29:15 +02:00
trace_book3s.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
trace_booke.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
trace_hv.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
trace_pr.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
trace.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00