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| author | Paolo Bonzini <pbonzini@redhat.com> | 2021-03-18 09:42:32 -0400 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-03-19 08:48:18 -0400 |
| commit | da3f3b020f5346f59c30241ff6f3da60be87ed78 (patch) | |
| tree | e2529b165b16b28ee2bab9707e974a81717e9ff0 /target | |
| parent | b8184135835068e9579e678f0b54465ee6161d32 (diff) | |
target/i386: fail if toggling LA57 in 64-bit mode
This fixes kvm-unit-tests access.flat with -cpu qemu64,la57.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'target')
| -rw-r--r-- | target/i386/tcg/misc_helper.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/target/i386/tcg/misc_helper.c b/target/i386/tcg/misc_helper.c index 90b87fdef0..a25428c36e 100644 --- a/target/i386/tcg/misc_helper.c +++ b/target/i386/tcg/misc_helper.c @@ -167,6 +167,10 @@ void helper_write_crN(CPUX86State *env, int reg, target_ulong t0) cpu_x86_update_cr3(env, t0); break; case 4: + if (((t0 ^ env->cr[4]) & CR4_LA57_MASK) && + (env->hflags & HF_CS64_MASK)) { + raise_exception_ra(env, EXCP0D_GPF, GETPC()); + } cpu_x86_update_cr4(env, t0); break; case 8: |