Sean Christopherson c7cb2d650c KVM: VMX: Explicitly clear RFLAGS.CF and RFLAGS.ZF in VM-Exit RSB path ... Clear CF and ZF in the VM-Exit path after doing __FILL_RETURN_BUFFER so that KVM doesn't interpret clobbered RFLAGS as a VM-Fail. Filling the RSB has always clobbered RFLAGS, its current incarnation just happens clear CF and ZF in the processs. Relying on the macro to clear CF and ZF is extremely fragile, e.g. commit 089dd8e531 ("x86/speculation: Change FILL_RETURN_BUFFER to work with objtool") tweaks the loop such that the ZF flag is always set. Reported-by: Qian Cai <cai@lca.pw> Cc: Rick Edgecombe <rick.p.edgecombe@intel.com> Cc: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: stable@vger.kernel.org Fixes: f2fde6a5bc ("KVM: VMX: Move RSB stuffing to before the first RET after VM-Exit") Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com> Message-Id: <20200506035355.2242-1-sean.j.christopherson@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>		2020-05-06 06:51:35 -04:00
..
capabilities.h	KVM: x86: Handle PKU CPUID adjustment in VMX code	2020-03-16 17:58:19 +01:00
evmcs.c	x86/kvm/hyper-v: don't allow to turn on unsupported VMX controls for nested guests	2020-02-05 15:55:26 +01:00
evmcs.h	KVM: nVMX: properly handle errors in nested_vmx_handle_enlightened_vmptrld()	2020-03-16 18:19:30 +01:00
nested.c	KVM: nVMX: Replace a BUG_ON(1) with BUG() to squash clang warning	2020-05-04 11:58:55 -04:00
nested.h	KVM: VMX: Configure runtime hooks using vmx_x86_ops	2020-03-31 10:48:06 -04:00
ops.h	x86/kvm: fix a missing-prototypes "vmread_error"	2020-04-02 15:17:45 -04:00
pmu_intel.c	KVM: VMX: Directly query Intel PT mode when refreshing PMUs	2020-03-16 17:58:38 +01:00
vmcs.h	KVM: VMX: Leave preemption timer running when it's disabled	2019-06-18 17:10:46 +02:00
vmcs12.c	KVM: nVMX: Move vmcs12 code to dedicated files	2018-12-14 12:34:30 +01:00
vmcs12.h	KVM/arm updates for 5.3	2019-07-11 15:14:16 +02:00
vmcs_shadow_fields.h	KVM: Fix some out-dated function names in comment	2020-01-21 13:57:27 +01:00
vmenter.S	KVM: VMX: Explicitly clear RFLAGS.CF and RFLAGS.ZF in VM-Exit RSB path	2020-05-06 06:51:35 -04:00
vmx.c	KVM: s390: Fix for 5.7 and maintainer update	2020-04-21 09:37:13 -04:00
vmx.h	ARM:	2020-04-02 15:13:15 -07:00