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AJvYcCUrL2u8sXT6WLqgdIcuaWTzjzldciK1WP4maPi1qr1XuYpKTW2LxoRkuBlHiWGaFBrj82BPQ3Jz7w==@kvack.org X-Gm-Message-State: AOJu0Ywec0sco+lyautSUzYNVdb09cWZuOyWsEwmjtXgznV63/5APs2h ULOvUyBywEDve6/0WGP/sRpll09ISLGaNlBtLPuU7+3V/37Hq2DP8migVpsj+M0oB3HbHJHjhw= = X-Google-Smtp-Source: AGHT+IFYYSu+z7lcdTevEwKYxKvR0BM42N5Yxez0Q/Zy8BqAGBeXJPTD7ox5Spif8yRdhs0jTp5x8CQKow== X-Received: from wmhu3.prod.google.com ([2002:a05:600c:a363:b0:43d:1d5b:1c79]) (user=tabba job=prod-delivery.src-stubby-dispatcher) by 2002:a05:600c:35d2:b0:43c:fffc:786c with SMTP id 5b1f17b1804b1-441b1f3ab0fmr32935775e9.19.1746032239805; Wed, 30 Apr 2025 09:57:19 -0700 (PDT) Date: Wed, 30 Apr 2025 17:56:53 +0100 In-Reply-To: <20250430165655.605595-1-tabba@google.com> Mime-Version: 1.0 References: <20250430165655.605595-1-tabba@google.com> X-Mailer: git-send-email 2.49.0.967.g6a0df3ecc3-goog Message-ID: <20250430165655.605595-12-tabba@google.com> Subject: [PATCH v8 11/13] KVM: arm64: Enable mapping guest_memfd in arm64 From: Fuad Tabba To: kvm@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-mm@kvack.org Cc: pbonzini@redhat.com, chenhuacai@kernel.org, mpe@ellerman.id.au, anup@brainfault.org, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, seanjc@google.com, viro@zeniv.linux.org.uk, brauner@kernel.org, willy@infradead.org, akpm@linux-foundation.org, xiaoyao.li@intel.com, yilun.xu@intel.com, chao.p.peng@linux.intel.com, jarkko@kernel.org, amoorthy@google.com, dmatlack@google.com, isaku.yamahata@intel.com, mic@digikod.net, vbabka@suse.cz, vannapurve@google.com, ackerleytng@google.com, mail@maciej.szmigiero.name, david@redhat.com, michael.roth@amd.com, wei.w.wang@intel.com, liam.merwick@oracle.com, isaku.yamahata@gmail.com, kirill.shutemov@linux.intel.com, suzuki.poulose@arm.com, steven.price@arm.com, quic_eberman@quicinc.com, quic_mnalajal@quicinc.com, quic_tsoni@quicinc.com, quic_svaddagi@quicinc.com, quic_cvanscha@quicinc.com, quic_pderrin@quicinc.com, quic_pheragu@quicinc.com, catalin.marinas@arm.com, james.morse@arm.com, yuzenghui@huawei.com, oliver.upton@linux.dev, maz@kernel.org, will@kernel.org, qperret@google.com, keirf@google.com, roypat@amazon.co.uk, shuah@kernel.org, hch@infradead.org, jgg@nvidia.com, rientjes@google.com, jhubbard@nvidia.com, fvdl@google.com, hughd@google.com, jthoughton@google.com, peterx@redhat.com, pankaj.gupta@amd.com, tabba@google.com Content-Type: text/plain; charset="UTF-8" X-Stat-Signature: c4iu9ekaozhzy8cfyccwfpkgb5yawg6k X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: 2EB3A160006 X-Rspam-User: X-HE-Tag: 1746032240-599356 X-HE-Meta: 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 oTUf76qk 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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: Enable mapping guest_memfd in arm64. For now, it applies to all VMs in arm64 that use guest_memfd. In the future, new VM types can restrict this via kvm_arch_gmem_supports_shared_mem(). Signed-off-by: Fuad Tabba --- arch/arm64/include/asm/kvm_host.h | 12 ++++++++++++ arch/arm64/kvm/Kconfig | 1 + 2 files changed, 13 insertions(+) diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 08ba91e6fb03..1b1753e8021a 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -1593,4 +1593,16 @@ static inline bool kvm_arch_has_irq_bypass(void) return true; } +#ifdef CONFIG_KVM_GMEM +static inline bool kvm_arch_supports_gmem(struct kvm *kvm) +{ + return IS_ENABLED(CONFIG_KVM_GMEM); +} + +static inline bool kvm_arch_gmem_supports_shared_mem(struct kvm *kvm) +{ + return IS_ENABLED(CONFIG_KVM_GMEM_SHARED_MEM); +} +#endif /* CONFIG_KVM_GMEM */ + #endif /* __ARM64_KVM_HOST_H__ */ diff --git a/arch/arm64/kvm/Kconfig b/arch/arm64/kvm/Kconfig index 096e45acadb2..8c1e1964b46a 100644 --- a/arch/arm64/kvm/Kconfig +++ b/arch/arm64/kvm/Kconfig @@ -38,6 +38,7 @@ menuconfig KVM select HAVE_KVM_VCPU_RUN_PID_CHANGE select SCHED_INFO select GUEST_PERF_EVENTS if PERF_EVENTS + select KVM_GMEM_SHARED_MEM help Support hosting virtualized guest machines. -- 2.49.0.901.g37484f566f-goog