lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Message-ID: <20241101191447.1807602-1-seanjc@google.com>
Date: Fri,  1 Nov 2024 12:14:42 -0700
From: Sean Christopherson <seanjc@...gle.com>
To: Sean Christopherson <seanjc@...gle.com>, Paolo Bonzini <pbonzini@...hat.com>
Cc: kvm@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Chao Gao <chao.gao@...el.com>
Subject: [PATCH 0/5] KVM: nVMX: Honor event priority for PI ack at VM-Enter

Rework and cleanup KVM's event handling during nested VM-Enter emulation,
and ultimately fix a bug where KVM doesn't honor event priority when
delivering a nested posted interrupt.  Specifically, if there is a posted
interrupt *notification* IRQ in L1's vIRR, the IRQ should not be acked by
the CPU if a higher priority event is recognized after VM-Enter (which
unblocks L1 IRQs).

FWIW, I don't exactly love the resulting code in vmx_check_nested_events(),
so if someone has a better idea...

Sean Christopherson (5):
  KVM: nVMX: Explicitly update vPPR on successful nested VM-Enter
  KVM: nVMX: Check for pending INIT/SIPI after entering non-root mode
  KVM: nVMX: Drop manual vmcs01.GUEST_INTERRUPT_STATUS.RVI check at
    VM-Enter
  KVM: nVMX: Use vmcs01's controls shadow to check for IRQ/NMI windows
    at VM-Enter
  KVM: nVMX: Honor event priority when emulating PI delivery during
    VM-Enter

 arch/x86/kvm/vmx/nested.c | 77 ++++++++++++++++++++++-----------------
 1 file changed, 44 insertions(+), 33 deletions(-)


base-commit: e466901b947d529f7b091a3b00b19d2bdee206ee
-- 
2.47.0.163.g1226f6d8fa-goog


Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ