Babu Moger 9e46f6c6c9 KVM: SVM: Clear the CR4 register on reset ... This problem was reported on a SVM guest while executing kexec. Kexec fails to load the new kernel when the PCID feature is enabled. When kexec starts loading the new kernel, it starts the process by resetting the vCPU's and then bringing each vCPU online one by one. The vCPU reset is supposed to reset all the register states before the vCPUs are brought online. However, the CR4 register is not reset during this process. If this register is already setup during the last boot, all the flags can remain intact. The X86_CR4_PCIDE bit can only be enabled in long mode. So, it must be enabled much later in SMP initialization. Having the X86_CR4_PCIDE bit set during SMP boot can cause a boot failures. Fix the issue by resetting the CR4 register in init_vmcb(). Signed-off-by: Babu Moger <babu.moger@amd.com> Message-Id: <161471109108.30811.6392805173629704166.stgit@bmoger-ubuntu> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>		2021-03-02 14:39:11 -05:00
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avic.c	KVM: SVM: Move AVIC vCPU kicking snippet to helper function	2021-02-09 08:17:06 -05:00
nested.c	KVM: nSVM: prepare guest save area while is_guest_mode is true	2021-02-22 13:11:56 -05:00
pmu.c	KVM: x86/pmu: Tweak kvm_pmu_get_msr to pass 'struct msr_data' in	2020-06-01 04:26:08 -04:00
sev.c	KVM: SVM: use .prepare_guest_switch() to handle CPU register save/setup	2021-02-04 05:27:35 -05:00
svm.c	KVM: SVM: Clear the CR4 register on reset	2021-03-02 14:39:11 -05:00
svm.h	KVM: SVM: use .prepare_guest_switch() to handle CPU register save/setup	2021-02-04 05:27:35 -05:00
svm_ops.h	KVM: SVM: use vmsave/vmload for saving/restoring additional host state	2021-02-04 05:27:34 -05:00
vmenter.S	KVM: SVM: Provide an updated VMRUN invocation for SEV-ES guests	2020-12-15 05:20:59 -05:00