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Paul Mackerras 5138dd0db5 KVM: PPC: Book3S HV: Fix handling of large pages in radix page fault handler 
commit c3856aeb29 upstream.

This fixes several bugs in the radix page fault handler relating to
the way large pages in the memory backing the guest were handled.
First, the check for large pages only checked for explicit huge pages
and missed transparent huge pages.  Then the check that the addresses
(host virtual vs. guest physical) had appropriate alignment was
wrong, meaning that the code never put a large page in the partition
scoped radix tree; it was always demoted to a small page.

Fixing this exposed bugs in kvmppc_create_pte().  We were never
invalidating a 2MB PTE, which meant that if a page was initially
faulted in without write permission and the guest then attempted
to store to it, we would never update the PTE to have write permission.
If we find a valid 2MB PTE in the PMD, we need to clear it and
do a TLB invalidation before installing either the new 2MB PTE or
a pointer to a page table page.

This also corrects an assumption that get_user_pages_fast would set
the _PAGE_DIRTY bit if we are writing, which is not true.  Instead we
mark the page dirty explicitly with set_page_dirty_lock().  This
also means we don't need the dirty bit set on the host PTE when
providing write access on a read fault.

[paulus@ozlabs.org - use mark_pages_dirty instead of
 kvmppc_update_dirty_map]

Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2018-05-16 10:10:31 +02:00
..
book3s.c * ARM: HYP mode stub supports kexec/kdump on 32-bit; improved PMU 2017-05-08 12:37:56 -07:00
book3s.h kvm: Fix page ageing bugs 2014-09-24 14:07:58 +02:00
book3s_32_mmu.c KVM: PPC: Book3S PR: Ratelimit copy data failure error messages 2017-02-17 14:03:35 +11:00
book3s_32_mmu_host.c powerpc/mm: Move hash related mmu-*.h headers to book3s/ 2016-03-03 21:19:21 +11:00
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.c KVM: PPC: Book3S PR: Fix WIMG handling under pHyp 2018-01-17 09:45:24 +01:00
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 KVM: PPC: Book3S HV: Fix handling of secondary HPTEG in HPT resizing code 2018-04-26 11:02:19 +02:00
book3s_64_mmu_radix.c KVM: PPC: Book3S HV: Fix handling of large pages in radix page fault handler 2018-05-16 10:10:31 +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.c KVM: PPC: Book3S: Protect kvmppc_gpa_to_ua() with SRCU 2017-10-14 11:35:41 +11:00
book3s_64_vio_hv.c powerpc/mm: Rename find_linux_pte_or_hugepte() 2017-08-17 23:13:46 +10:00
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.c KVM: PPC: Book3S HV: Fix VRMA initialization with 2MB or 1GB memory backing 2018-05-16 10:10:25 +02:00
book3s_hv_builtin.c KVM: PPC: Book3S HV: Don't call real-mode XICS hypercall handlers if not enabled 2017-11-30 08:40:53 +00:00
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 KVM: PPC: Book3S HV: Exit guest upon MCE when FWNMI capability is enabled 2017-06-22 11:24:57 +10:00
book3s_hv_rm_mmu.c KVM: PPC: Book3S HV: trace_tlbie must not be called in realmode 2018-04-19 08:56:17 +02:00
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 trap number return from __kvmppc_vcore_entry 2018-05-16 10:10:25 +02:00
book3s_interrupts.S powerpc: Define and use PPC64_ELF_ABI_v2/v1 2016-06-14 13:58:27 +10:00
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.c KVM: PPC: Book3S PR: Fix WIMG handling under pHyp 2018-01-17 09:45:24 +01:00
book3s_pr_papr.c KVM: PPC: Book3S PR: Don't include SPAPR TCE code on non-pseries platforms 2017-05-12 15:32:30 +10:00
book3s_rmhandlers.S powerpc/64s: Simple RFI macro conversions 2018-01-23 19:58:10 +01:00
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 2018-01-23 19:58:10 +01:00
book3s_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_xics.h KVM: PPC: Book3S HV: Native usage of the XIVE interrupt controller 2017-04-27 21:37:29 +10:00
book3s_xive.c KVM: PPC: Book3S HV: Fix pending_pri value in kvmppc_xive_get_icp() 2017-12-29 17:53:48 +01:00
book3s_xive.h KVM: PPC: Book3S: Fix server always zero from kvmppc_xive_get_xive() 2017-10-03 17:58:16 +02:00
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
booke.c KVM: add kvm_request_pending 2017-06-04 16:53:00 +02:00
booke.h KVM: PPC: Book3e: Add AltiVec support 2014-09-22 10:11:32 +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
bookehv_interrupts.S powerpc/kvm: common sw breakpoint instr across ppc 2014-09-22 10:11:36 +02:00
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
e500_emulate.c KVM: PPC: e500: Emulate TMCFG0 TMRN register 2015-10-15 15:58:16 +11:00
e500_mmu.c KVM: PPC: e500: Rename jump labels in kvmppc_e500_tlb_init() 2016-09-13 14:32:47 +10:00
e500_mmu_host.c powerpc/mm: Rename find_linux_pte_or_hugepte() 2017-08-17 23:13:46 +10:00
e500_mmu_host.h KVM: PPC: E500: Make clear_tlb_refs and clear_tlb1_bitmap static 2013-01-24 19:23:33 +01:00
e500mc.c KVM: PPC: e500mc: Fix a NULL dereference 2017-08-31 12:36:44 +10:00
emulate.c KVM: PPC: Book3S HV: Enable guests to use large decrementer mode on POWER9 2017-06-19 14:02:04 +10:00
emulate_loadstore.c KVM: PPC: Add MMIO emulation for remaining floating-point instructions 2017-04-20 11:37:44 +10:00
fpu.S powerpc: Remove fpscr use from [kvm_]cvt_{fd,df} 2010-09-02 14:07:32 +10:00
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 KVM: PPC: Book3S PR: Fix broken select due to misspelling 2018-02-16 20:23:03 +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 HV: Enable migration of decrementer register 2018-04-26 11:02:04 +02:00
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.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
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