linux-kernel - [PATCH 0/3] KVM: x86: Add KVM_X86_SET_MSR

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Message-ID: <20221017184541.2658-1-graf@amazon.com>
Date:   Mon, 17 Oct 2022 20:45:38 +0200
From:   Alexander Graf <graf@...zon.com>
To:     <kvm@...r.kernel.org>
CC:     <linux-kernel@...r.kernel.org>, <x86@...nel.org>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>,
        "Andrew Randrianasulu" <randrianasulu@...il.com>,
        Thomas Huth <thuth@...hat.com>
Subject: [PATCH 0/3] KVM: x86: Add KVM_X86_SET_MSR_FILTE compat handler

In commit 1a155254ff937 ("KVM: x86: Introduce MSR filtering") we
introduced a new ioctl to handle MSR filtering. However, this ioctl
passes a pointer to kernel space in an ioctl struct - which breaks in
32-on-64 bit compat situations.

This patch set introduces a compat mechanism for architecutre spacific
VM ioctls and implements an MSR_FILTER wrapper in it.

Alexander Graf (3):
  kvm: Add support for arch compat vm ioctls
  KVM: x86: Make filter arg for set_msr_filter()
  KVM: x86: Add compat handler for KVM_X86_SET_MSR_FILTER

 arch/x86/kvm/x86.c       | 87 +++++++++++++++++++++++++++++++++-------
 include/linux/kvm_host.h |  2 +
 virt/kvm/kvm_main.c      | 11 +++++
 3 files changed, 86 insertions(+), 14 deletions(-)

-- 
2.37.1

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