From: Sean Christopherson <seanjc@google.com>
To: kvm-riscv@lists.infradead.org
Subject: [RFC PATCH v12 04/33] KVM: PPC: Return '1' unconditionally for KVM_CAP_SYNC_MMU
Date: Wed, 13 Sep 2023 18:55:02 -0700 [thread overview]
Message-ID: <20230914015531.1419405-5-seanjc@google.com> (raw)
In-Reply-To: <20230914015531.1419405-1-seanjc@google.com>
Advertise that KVM's MMU is synchronized with the primary MMU for all
flavors of PPC KVM support, i.e. advertise that the MMU is synchronized
when CONFIG_KVM_BOOK3S_HV_POSSIBLE=y but the VM is not using hypervisor
mode (a.k.a. PR VMs). PR VMs, via kvm_unmap_gfn_range_pr(), do the right
thing for mmu_notifier invalidation events, and more tellingly, KVM
returns '1' for KVM_CAP_SYNC_MMU when CONFIG_KVM_BOOK3S_HV_POSSIBLE=n
and CONFIG_KVM_BOOK3S_PR_POSSIBLE=y, i.e. KVM already advertises a
synchronized MMU for PR VMs, just not when CONFIG_KVM_BOOK3S_HV_POSSIBLE=y.
Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
---
arch/powerpc/kvm/powerpc.c | 4 ----
1 file changed, 4 deletions(-)
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index b0a512ede764..8d3ec483bc2b 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -635,11 +635,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
#if !defined(CONFIG_MMU_NOTIFIER) || !defined(KVM_ARCH_WANT_MMU_NOTIFIER)
BUILD_BUG();
#endif
-#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
- r = hv_enabled;
-#else
r = 1;
-#endif
break;
#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
case KVM_CAP_PPC_HTAB_FD:
--
2.42.0.283.g2d96d420d3-goog
next prev parent reply other threads:[~2023-09-14 1:55 UTC|newest]
Thread overview: 83+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-14 1:54 [RFC PATCH v12 00/33] KVM: guest_memfd() and per-page attributes Sean Christopherson
2023-09-14 1:54 ` [RFC PATCH v12 01/33] KVM: Tweak kvm_hva_range and hva_handler_t to allow reusing for gfn ranges Sean Christopherson
2023-09-15 6:47 ` Xiaoyao Li
2023-09-15 21:05 ` Sean Christopherson
2023-09-14 1:55 ` [RFC PATCH v12 02/33] KVM: Use gfn instead of hva for mmu_notifier_retry Sean Christopherson
2023-09-14 3:07 ` Binbin Wu
2023-09-14 14:19 ` Sean Christopherson
2023-09-20 6:07 ` Xu Yilun
2023-09-20 13:55 ` Sean Christopherson
2023-09-21 2:39 ` Xu Yilun
2023-09-21 14:24 ` Sean Christopherson
2023-09-14 1:55 ` [RFC PATCH v12 03/33] KVM: PPC: Drop dead code related to KVM_ARCH_WANT_MMU_NOTIFIER Sean Christopherson
2023-09-14 1:55 ` Sean Christopherson [this message]
2023-09-14 1:55 ` [RFC PATCH v12 05/33] KVM: Convert KVM_ARCH_WANT_MMU_NOTIFIER to CONFIG_KVM_GENERIC_MMU_NOTIFIER Sean Christopherson
2023-10-09 16:42 ` Anup Patel
2023-09-14 1:55 ` [RFC PATCH v12 06/33] KVM: Introduce KVM_SET_USER_MEMORY_REGION2 Sean Christopherson
2023-09-15 6:59 ` Xiaoyao Li
2023-09-14 1:55 ` [RFC PATCH v12 07/33] KVM: Add KVM_EXIT_MEMORY_FAULT exit to report faults to userspace Sean Christopherson
2023-09-22 6:03 ` Xiaoyao Li
2023-09-22 14:30 ` Sean Christopherson
2023-09-22 16:28 ` Sean Christopherson
2023-09-22 16:35 ` Sean Christopherson
2023-10-02 22:33 ` Anish Moorthy
2023-10-03 1:42 ` Sean Christopherson
2023-10-03 22:59 ` Anish Moorthy
2023-10-03 23:46 ` Sean Christopherson
2023-10-05 22:07 ` Anish Moorthy
2023-10-05 22:46 ` Sean Christopherson
2023-10-10 22:21 ` David Matlack
2023-10-13 18:45 ` Sean Christopherson
2023-09-14 1:55 ` [RFC PATCH v12 08/33] KVM: Add a dedicated mmu_notifier flag for reclaiming freed memory Sean Christopherson
2023-09-14 1:55 ` [RFC PATCH v12 09/33] KVM: Drop .on_unlock() mmu_notifier hook Sean Christopherson
2023-09-14 1:55 ` [RFC PATCH v12 10/33] KVM: Set the stage for handling only shared mappings in mmu_notifier events Sean Christopherson
2023-09-18 1:14 ` Binbin Wu
2023-09-18 15:57 ` Sean Christopherson
2023-09-18 18:07 ` Michael Roth
2023-09-19 0:08 ` Sean Christopherson
2023-09-14 1:55 ` [RFC PATCH v12 11/33] KVM: Introduce per-page memory attributes Sean Christopherson
2023-09-15 6:32 ` Yan Zhao
2023-09-20 21:00 ` Sean Christopherson
2023-09-21 1:21 ` Yan Zhao
2023-09-25 17:37 ` Sean Christopherson
2023-09-18 7:51 ` Binbin Wu
2023-09-20 21:03 ` Sean Christopherson
2023-09-27 5:19 ` Binbin Wu
2023-10-03 12:47 ` Fuad Tabba
2023-10-03 15:59 ` Sean Christopherson
2023-10-03 18:33 ` Fuad Tabba
2023-10-03 20:51 ` Sean Christopherson
2023-09-14 1:55 ` [RFC PATCH v12 12/33] mm: Add AS_UNMOVABLE to mark mapping as completely unmovable Sean Christopherson
2023-09-14 1:55 ` [RFC PATCH v12 13/33] security: Export security_inode_init_security_anon() for use by KVM Sean Christopherson
2023-09-14 1:55 ` [RFC PATCH v12 14/33] KVM: Add KVM_CREATE_GUEST_MEMFD ioctl() for guest-specific backing memory Sean Christopherson
2023-09-15 6:11 ` Yan Zhao
2023-09-18 16:36 ` Michael Roth
2023-09-20 23:44 ` Sean Christopherson
2023-09-19 9:01 ` Binbin Wu
2023-09-20 14:24 ` Sean Christopherson
2023-09-21 5:58 ` Binbin Wu
2023-09-21 19:10 ` Sean Christopherson
2023-09-14 1:55 ` [RFC PATCH v12 15/33] KVM: Add transparent hugepage support for dedicated guest memory Sean Christopherson
2023-09-14 1:55 ` [RFC PATCH v12 16/33] KVM: x86: "Reset" vcpu->run->exit_reason early in KVM_RUN Sean Christopherson
2023-09-14 1:55 ` [RFC PATCH v12 17/33] KVM: x86: Disallow hugepages when memory attributes are mixed Sean Christopherson
2023-09-14 1:55 ` [RFC PATCH v12 18/33] KVM: x86/mmu: Handle page fault for private memory Sean Christopherson
2023-09-15 5:40 ` Yan Zhao
2023-09-15 14:26 ` Sean Christopherson
2023-09-18 0:54 ` Yan Zhao
2023-09-21 14:59 ` Sean Christopherson
2023-09-21 5:51 ` Binbin Wu
2023-09-14 1:55 ` [RFC PATCH v12 19/33] KVM: Drop superfluous __KVM_VCPU_MULTIPLE_ADDRESS_SPACE macro Sean Christopherson
2023-09-14 1:55 ` [RFC PATCH v12 20/33] KVM: Allow arch code to track number of memslot address spaces per VM Sean Christopherson
2023-09-14 1:55 ` [RFC PATCH v12 21/33] KVM: x86: Add support for "protected VMs" that can utilize private memory Sean Christopherson
2023-09-14 1:55 ` [RFC PATCH v12 22/33] KVM: selftests: Drop unused kvm_userspace_memory_region_find() helper Sean Christopherson
2023-09-14 1:55 ` [RFC PATCH v12 23/33] KVM: selftests: Convert lib's mem regions to KVM_SET_USER_MEMORY_REGION2 Sean Christopherson
2023-09-14 1:55 ` [RFC PATCH v12 24/33] KVM: selftests: Add support for creating private memslots Sean Christopherson
2023-09-14 1:55 ` [RFC PATCH v12 25/33] KVM: selftests: Add helpers to convert guest memory b/w private and shared Sean Christopherson
2023-09-14 1:55 ` [RFC PATCH v12 26/33] KVM: selftests: Add helpers to do KVM_HC_MAP_GPA_RANGE hypercalls (x86) Sean Christopherson
2023-09-14 1:55 ` [RFC PATCH v12 27/33] KVM: selftests: Introduce VM "shape" to allow tests to specify the VM type Sean Christopherson
2023-09-14 1:55 ` [RFC PATCH v12 28/33] KVM: selftests: Add GUEST_SYNC[1-6] macros for synchronizing more data Sean Christopherson
2023-09-14 1:55 ` [RFC PATCH v12 29/33] KVM: selftests: Add x86-only selftest for private memory conversions Sean Christopherson
2023-09-14 1:55 ` [RFC PATCH v12 30/33] KVM: selftests: Add KVM_SET_USER_MEMORY_REGION2 helper Sean Christopherson
2023-09-14 1:55 ` [RFC PATCH v12 31/33] KVM: selftests: Expand set_memory_region_test to validate guest_memfd() Sean Christopherson
2023-09-14 1:55 ` [RFC PATCH v12 32/33] KVM: selftests: Add basic selftest for guest_memfd() Sean Christopherson
2023-09-14 1:55 ` [RFC PATCH v12 33/33] KVM: selftests: Test KVM exit behavior for private memory/access Sean Christopherson
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