linux-dev/arch/x86/kvm/Makefile, branch master

KVM: SVM: replace regs argument of __svm_vcpu_run() with vcpu_svm

2022-11-09T17:16:34Z

Since registers are reachable through vcpu_svm, and we will need to access more fields of that struct, pass it instead of the regs[] array. No functional change intended. Cc: stable@vger.kernel.org Fixes: a149180fbcf3 ("x86: Add magic AMD return-thunk") Reviewed-by: Sean Christopherson Signed-off-by: Paolo Bonzini

KVM: x86: use a separate asm-offsets.c file

2022-11-09T17:10:17Z

This already removes an ugly #include "" from asm-offsets.c, but especially it avoids a future error when trying to define asm-offsets for KVM's svm/svm.h header. This would not work for kernel/asm-offsets.c, because svm/svm.h includes kvm_cache_regs.h which is not in the include path when compiling asm-offsets.c. The problem is not there if the .c file is in arch/x86/kvm. Suggested-by: Sean Christopherson Cc: stable@vger.kernel.org Fixes: a149180fbcf3 ("x86: Add magic AMD return-thunk") Reviewed-by: Sean Christopherson Signed-off-by: Paolo Bonzini

KVM: Add Makefile.kvm for common files, use it for x86

2021-12-09T17:56:02Z

Splitting kvm_main.c out into smaller and better-organized files is slightly non-trivial when it involves editing a bunch of per-arch KVM makefiles. Provide virt/kvm/Makefile.kvm for them to include. Signed-off-by: David Woodhouse Acked-by: Marc Zyngier Message-Id: <20211121125451.9489-3-dwmw2@infradead.org> Signed-off-by: Paolo Bonzini

KVM: stats: Add fd-based API to read binary stats data

2021-06-24T15:47:57Z

This commit defines the API for userspace and prepare the common functionalities to support per VM/VCPU binary stats data readings. The KVM stats now is only accessible by debugfs, which has some shortcomings this change series are supposed to fix: 1. The current debugfs stats solution in KVM could be disabled when kernel Lockdown mode is enabled, which is a potential rick for production. 2. The current debugfs stats solution in KVM is organized as "one stats per file", it is good for debugging, but not efficient for production. 3. The stats read/clear in current debugfs solution in KVM are protected by the global kvm_lock. Besides that, there are some other benefits with this change: 1. All KVM VM/VCPU stats can be read out in a bulk by one copy to userspace. 2. A schema is used to describe KVM statistics. From userspace's perspective, the KVM statistics are self-describing. 3. With the fd-based solution, a separate telemetry would be able to read KVM stats in a less privileged environment. 4. After the initial setup by reading in stats descriptors, a telemetry only needs to read the stats data itself, no more parsing or setup is needed. Reviewed-by: David Matlack Reviewed-by: Ricardo Koller Reviewed-by: Krish Sadhukhan Reviewed-by: Fuad Tabba Tested-by: Fuad Tabba #arm64 Signed-off-by: Jing Zhang Message-Id: <20210618222709.1858088-3-jingzhangos@google.com> Signed-off-by: Paolo Bonzini

KVM: SVM: hyper-v: Direct Virtual Flush support

2021-06-17T17:09:38Z

From Hyper-V TLFS: "The hypervisor exposes hypercalls (HvFlushVirtualAddressSpace, HvFlushVirtualAddressSpaceEx, HvFlushVirtualAddressList, and HvFlushVirtualAddressListEx) that allow operating systems to more efficiently manage the virtual TLB. The L1 hypervisor can choose to allow its guest to use those hypercalls and delegate the responsibility to handle them to the L0 hypervisor. This requires the use of a partition assist page." Add the Direct Virtual Flush support for SVM. Related VMX changes: commit 6f6a657c9998 ("KVM/Hyper-V/VMX: Add direct tlb flush support") Signed-off-by: Vineeth Pillai Message-Id: Signed-off-by: Paolo Bonzini

KVM: x86: hyper-v: Move the remote TLB flush logic out of vmx

2021-06-17T17:09:36Z

Currently the remote TLB flush logic is specific to VMX. Move it to a common place so that SVM can use it as well. Signed-off-by: Vineeth Pillai Message-Id: <4f4e4ca19778437dae502f44363a38e99e3ef5d1.1622730232.git.viremana@linux.microsoft.com> Signed-off-by: Paolo Bonzini

Merge branch 'kvm-sev-cgroup' into HEAD

2021-04-22T17:19:01Z

KVM: VMX: Frame in ENCLS handler for SGX virtualization

2021-04-20T08:18:55Z

Introduce sgx.c and sgx.h, along with the framework for handling ENCLS VM-Exits. Add a bool, enable_sgx, that will eventually be wired up to a module param to control whether or not SGX virtualization is enabled at runtime. Signed-off-by: Sean Christopherson Signed-off-by: Kai Huang Message-Id: <1c782269608b2f5e1034be450f375a8432fb705d.1618196135.git.kai.huang@intel.com> Signed-off-by: Paolo Bonzini

KVM: make: Fix out-of-source module builds

2021-03-30T17:07:10Z

Building kvm module out-of-source with, make -C $SRC O=$BIN M=arch/x86/kvm fails to find "irq.h" as the include dir passed to cflags-y does not prefix the source dir. Fix this by prefixing $(srctree) to the include dir path. Signed-off-by: Siddharth Chandrasekaran Message-Id: <20210324124347.18336-1-sidcha@amazon.de> Signed-off-by: Paolo Bonzini

KVM: x86: allow compiling out the Xen hypercall interface

2021-03-02T19:30:45Z

The Xen hypercall interface adds to the attack surface of the hypervisor and will be used quite rarely. Allow compiling it out. Suggested-by: Christoph Hellwig Reviewed-by: David Woodhouse Signed-off-by: Paolo Bonzini