linux-kernel - [PATCH 0/2] KVM: x86: Correct use of kvm_rip

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Message-ID: <20250415104821.247234-1-adrian.hunter@intel.com>
Date: Tue, 15 Apr 2025 13:48:19 +0300
From: Adrian Hunter <adrian.hunter@...el.com>
To: pbonzini@...hat.com,
	seanjc@...gle.com
Cc: 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 0/2] KVM: x86: Correct use of kvm_rip_read()

Hi

Here are a couple of tweaks to dodge kvm_rip_read() in tracepoints and
KVM_PROFILING when guest_state_protected.

This avoids, for example, hitting WARN_ON_ONCE in vt_cache_reg() for
TDX VMs.


Adrian Hunter (2):
      KVM: x86: Do not use kvm_rip_read() unconditionally in KVM tracepoints
      KVM: x86: Do not use kvm_rip_read() unconditionally for KVM_PROFILING

 arch/x86/kvm/trace.h | 13 ++++++++++---
 arch/x86/kvm/x86.c   |  3 ++-
 2 files changed, 12 insertions(+), 4 deletions(-)


Regards
Adrian