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target/i386: Added consistency checks for VMRUN intercept and ASID

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Zero VMRUN intercept and ASID should cause an immediate VMEXIT
during the consistency checks performed by VMRUN.
(AMD64 Architecture Programmer's Manual, V2, 15.5)

Signed-off-by: Lara Lazier <laramglazier@gmail.com>
Message-Id: <20210616123907.17765-3-laramglazier@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Lara Lazier 2021-06-16 14:39:05 +02:00 • committed by Paolo Bonzini
parent 813c6459ee
commit 7eb54ca95d
1 changed files with 10 additions and 0 deletions
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10
target/i386/tcg/sysemu/svm_helper.c
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@ -72,6 +72,7 @@ void helper_vmrun(CPUX86State *env, int aflag, int next_eip_addend)
uint64_t nested_ctl;
uint32_t event_inj;
uint32_t int_ctl;
uint32_t asid;
cpu_svm_check_intercept_param(env, SVM_EXIT_VMRUN, 0, GETPC());
@ -154,9 +155,18 @@ void helper_vmrun(CPUX86State *env, int aflag, int next_eip_addend)
nested_ctl = x86_ldq_phys(cs, env->vm_vmcb + offsetof(struct vmcb,
control.nested_ctl));
asid = x86_ldq_phys(cs, env->vm_vmcb + offsetof(struct vmcb,
control.asid));
env->nested_pg_mode = 0;
if (!cpu_svm_has_intercept(env, SVM_EXIT_VMRUN)) {
cpu_vmexit(env, SVM_EXIT_ERR, 0, GETPC());
}
if (asid == 0) {
cpu_vmexit(env, SVM_EXIT_ERR, 0, GETPC());
}
if (nested_ctl & SVM_NPT_ENABLED) {
env->nested_cr3 = x86_ldq_phys(cs,
env->vm_vmcb + offsetof(struct vmcb,