Message ID | 20221130230934.1014142-31-seanjc@google.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show
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Wed, 30 Nov 2022 15:10:29 -0800 (PST) Reply-To: Sean Christopherson <seanjc@google.com> Date: Wed, 30 Nov 2022 23:09:14 +0000 In-Reply-To: <20221130230934.1014142-1-seanjc@google.com> Mime-Version: 1.0 References: <20221130230934.1014142-1-seanjc@google.com> X-Mailer: git-send-email 2.38.1.584.g0f3c55d4c2-goog Message-ID: <20221130230934.1014142-31-seanjc@google.com> Subject: [PATCH v2 30/50] KVM: VMX: Make VMCS configuration/capabilities structs read-only after init From: Sean Christopherson <seanjc@google.com> To: Paolo Bonzini <pbonzini@redhat.com>, Marc Zyngier <maz@kernel.org>, Huacai Chen <chenhuacai@kernel.org>, Aleksandar Markovic <aleksandar.qemu.devel@gmail.com>, Anup Patel <anup@brainfault.org>, Paul Walmsley <paul.walmsley@sifive.com>, Palmer Dabbelt <palmer@dabbelt.com>, Albert Ou <aou@eecs.berkeley.edu>, Christian Borntraeger <borntraeger@linux.ibm.com>, Janosch Frank <frankja@linux.ibm.com>, Claudio Imbrenda <imbrenda@linux.ibm.com>, Matthew Rosato <mjrosato@linux.ibm.com>, Eric Farman <farman@linux.ibm.com>, Sean Christopherson <seanjc@google.com>, Vitaly Kuznetsov <vkuznets@redhat.com>, David Woodhouse <dwmw2@infradead.org>, Paul Durrant <paul@xen.org> Cc: James Morse <james.morse@arm.com>, Alexandru Elisei <alexandru.elisei@arm.com>, Suzuki K Poulose <suzuki.poulose@arm.com>, Oliver Upton <oliver.upton@linux.dev>, Atish Patra <atishp@atishpatra.org>, David Hildenbrand <david@redhat.com>, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, kvmarm@lists.cs.columbia.edu, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, Yuan Yao <yuan.yao@intel.com>, Cornelia Huck <cohuck@redhat.com>, Isaku Yamahata <isaku.yamahata@intel.com>, " =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= " <philmd@linaro.org>, Fabiano Rosas <farosas@linux.ibm.com>, Michael Ellerman <mpe@ellerman.id.au>, Kai Huang <kai.huang@intel.com>, Chao Gao <chao.gao@intel.com>, Thomas Gleixner <tglx@linutronix.de> Content-Type: text/plain; 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KVM: Rework kvm_init() and hardware enabling
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diff --git a/arch/x86/kvm/vmx/capabilities.h b/arch/x86/kvm/vmx/capabilities.h index cd2ac9536c99..45162c1bcd8f 100644 --- a/arch/x86/kvm/vmx/capabilities.h +++ b/arch/x86/kvm/vmx/capabilities.h @@ -66,13 +66,13 @@ struct vmcs_config { u64 misc; struct nested_vmx_msrs nested; }; -extern struct vmcs_config vmcs_config; +extern struct vmcs_config vmcs_config __ro_after_init; struct vmx_capability { u32 ept; u32 vpid; }; -extern struct vmx_capability vmx_capability; +extern struct vmx_capability vmx_capability __ro_after_init; static inline bool cpu_has_vmx_basic_inout(void) { diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index 76185a7a7ded..654d81f781da 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -488,8 +488,8 @@ static DEFINE_PER_CPU(struct list_head, loaded_vmcss_on_cpu); static DECLARE_BITMAP(vmx_vpid_bitmap, VMX_NR_VPIDS); static DEFINE_SPINLOCK(vmx_vpid_lock); -struct vmcs_config vmcs_config; -struct vmx_capability vmx_capability; +struct vmcs_config vmcs_config __ro_after_init; +struct vmx_capability vmx_capability __ro_after_init; #define VMX_SEGMENT_FIELD(seg) \ [VCPU_SREG_##seg] = { \
Tag vmcs_config and vmx_capability structs as __init, the canonical configuration is generated during hardware_setup() and must never be modified after that point. Signed-off-by: Sean Christopherson <seanjc@google.com> --- arch/x86/kvm/vmx/capabilities.h | 4 ++-- arch/x86/kvm/vmx/vmx.c | 4 ++-- 2 files changed, 4 insertions(+), 4 deletions(-)