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b=cpkBKdmWvemH6w0lh76iunukx6Zjj/pMFUJU42jZC+3eXHmkuj7BaqFe4c1oLWhQKB xyqy/riMU3qKMJ2RYGZW4VzWtSFB5DkxJmzbNFp0Xr40i5y8Dx3W2Ye31FMEx8rOzYiq 0fmuuyo0YiVo9z7aZBHhqSWAzHtasrPTPLIYQ3NHgflniasltFkLBKZt2wETJ89x+BrI SOZPa8ekD8bpyXNIVhSyGb61hZQHw6tTIz8IEha1WhiOQeYl/W4YIxYIFC3925A5AKnv ANBD7lY5x5fpV1iroHdv+xSb0vWRXUGt3N907nuXPLRDLCixu1o8Qj1MBF70y1+NW0Rl lSjg== X-Gm-Message-State: AOJu0YxSbno+4nqWZfMmNvHwQP12jwjm7Aev44AXfr6IU0sqvIRcyQ30 STrQRp7Mcorhd35/CPiRJwjSTzJLiHo= X-Google-Smtp-Source: AGHT+IEgJpE7SXSukSyCmrL3MrLSyvY8980C5XITIQh/pYBdmOorR/VvmfyRxJnTS7i/xC9oBoneiM7iOr4= X-Received: from zagreus.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:5c37]) (user=seanjc job=sendgmr) by 2002:a17:903:446:b0:1ca:2620:78ad with SMTP id iw6-20020a170903044600b001ca262078admr60815plb.8.1698430957451; Fri, 27 Oct 2023 11:22:37 -0700 (PDT) Reply-To: Sean Christopherson Date: Fri, 27 Oct 2023 11:21:48 -0700 In-Reply-To: <20231027182217.3615211-1-seanjc@google.com> Mime-Version: 1.0 References: <20231027182217.3615211-1-seanjc@google.com> X-Mailer: git-send-email 2.42.0.820.g83a721a137-goog Message-ID: <20231027182217.3615211-7-seanjc@google.com> Subject: [PATCH v13 06/35] KVM: PPC: Return '1' unconditionally for KVM_CAP_SYNC_MMU From: Sean Christopherson To: Paolo Bonzini , Marc Zyngier , Oliver Upton , Huacai Chen , Michael Ellerman , Anup Patel , Paul Walmsley , Palmer Dabbelt , Albert Ou , Sean Christopherson , Alexander Viro , Christian Brauner , "Matthew Wilcox (Oracle)" , Andrew Morton Cc: kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Xiaoyao Li , Xu Yilun , Chao Peng , Fuad Tabba , Jarkko Sakkinen , Anish Moorthy , David Matlack , Yu Zhang , Isaku Yamahata , " =?utf-8?q?Micka=C3=ABl_Sala?= =?utf-8?q?=C3=BCn?= " , Vlastimil Babka , Vishal Annapurve , Ackerley Tng , Maciej Szmigiero , David Hildenbrand , Quentin Perret , Michael Roth , Wang , Liam Merwick , Isaku Yamahata , "Kirill A . Shutemov" X-Rspam-User: X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 84E471C0011 X-Stat-Signature: mxuyrsfwdtdggj5qfhrnemuscmmry4u3 X-HE-Tag: 1698430958-768877 X-HE-Meta: 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 nu4zlfGb 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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 Signed-off-by: Sean Christopherson --- 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: