Pull up following revision(s) (requested by riastradh in ticket #1666):
sys/dev/nvmm/x86/nvmm_x86_svm.c: revision 1.85 nvmm: Filter CR4 bits on x86 SVM (AMD). In particular, prohibit PKE, Protection Key Enable, which requires some additional management of CPU state by nvmm.
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@ -1,4 +1,4 @@
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/* $NetBSD: nvmm_x86_svm.c,v 1.46.4.13 2020/09/13 11:56:44 martin Exp $ */
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/* $NetBSD: nvmm_x86_svm.c,v 1.46.4.14 2023/07/25 15:35:35 martin Exp $ */
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/*
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* Copyright (c) 2018-2019 The NetBSD Foundation, Inc.
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@ -30,7 +30,7 @@
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: nvmm_x86_svm.c,v 1.46.4.13 2020/09/13 11:56:44 martin Exp $");
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__KERNEL_RCSID(0, "$NetBSD: nvmm_x86_svm.c,v 1.46.4.14 2023/07/25 15:35:35 martin Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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@ -511,6 +511,33 @@ static uint64_t svm_xcr0_mask __read_mostly;
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#define CR4_TLB_FLUSH \
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(CR4_PSE|CR4_PAE|CR4_PGE|CR4_PCIDE|CR4_SMEP)
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#define CR4_VALID \
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(CR4_VME | \
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CR4_PVI | \
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CR4_TSD | \
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CR4_DE | \
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CR4_PSE | \
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CR4_PAE | \
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CR4_MCE | \
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CR4_PGE | \
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CR4_PCE | \
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CR4_OSFXSR | \
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CR4_OSXMMEXCPT | \
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CR4_UMIP | \
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/* CR4_LA57 excluded */ \
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/* bit 13 reserved on AMD */ \
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/* bit 14 reserved on AMD */ \
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/* bit 15 reserved on AMD */ \
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CR4_FSGSBASE | \
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CR4_PCIDE | \
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CR4_OSXSAVE | \
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/* bit 19 reserved on AMD */ \
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CR4_SMEP | \
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CR4_SMAP \
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/* CR4_PKE excluded */ \
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/* CR4_CET excluded */ \
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/* bits 24:63 reserved on AMD */)
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/* -------------------------------------------------------------------------- */
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struct svm_machdata {
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@ -1847,6 +1874,7 @@ svm_vcpu_setstate(struct nvmm_cpu *vcpu)
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vmcb->state.cr2 = state->crs[NVMM_X64_CR_CR2];
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vmcb->state.cr3 = state->crs[NVMM_X64_CR_CR3];
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vmcb->state.cr4 = state->crs[NVMM_X64_CR_CR4];
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vmcb->state.cr4 &= CR4_VALID;
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vmcb->ctrl.v &= ~VMCB_CTRL_V_TPR;
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vmcb->ctrl.v |= __SHIFTIN(state->crs[NVMM_X64_CR_CR8],
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