linux-kernel - [PATCH V2 0/1] KVM: TDX: Decrease TDX VM shutdown time

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Message-ID: <20250417131945.109053-1-adrian.hunter@intel.com>
Date: Thu, 17 Apr 2025 16:19:44 +0300
From: Adrian Hunter <adrian.hunter@...el.com>
To: pbonzini@...hat.com,
	seanjc@...gle.com
Cc: mlevitsk@...hat.com,
	kvm@...r.kernel.org,
	rick.p.edgecombe@...el.com,
	kirill.shutemov@...ux.intel.com,
	kai.huang@...el.com,
	reinette.chatre@...el.com,
	xiaoyao.li@...el.com,
	tony.lindgren@...ux.intel.com,
	binbin.wu@...ux.intel.com,
	isaku.yamahata@...el.com,
	linux-kernel@...r.kernel.org,
	yan.y.zhao@...el.com,
	chao.gao@...el.com
Subject: [PATCH V2 0/1] KVM: TDX: Decrease TDX VM shutdown time

Hi

The version 1 RFC:

	https://lore.kernel.org/all/20250313181629.17764-1-adrian.hunter@intel.com/

listed 3 options and implemented option 2.  Sean replied with code for
option 1, which tested out OK, so here it is plus a commit log.

It depends upon kvm_trylock_all_vcpus(kvm) which is the assumed result
of Maxim's work-in-progress here:

      https://lore.kernel.org/all/20250409014136.2816971-1-mlevitsk@redhat.com/

Note it is assumed that kvm_trylock_all_vcpus(kvm) follows the return value
semantics of mutex_trylock() i.e. 1 means locks have been successfully
acquired, 0 means not succesful.


Sean Christopherson (1):
      KVM: TDX: Add sub-ioctl KVM_TDX_TERMINATE_VM

 Documentation/virt/kvm/x86/intel-tdx.rst | 16 ++++++++
 arch/x86/include/uapi/asm/kvm.h          |  1 +
 arch/x86/kvm/vmx/tdx.c                   | 63 ++++++++++++++++++++++----------
 3 files changed, 61 insertions(+), 19 deletions(-)


Regards
Adrian