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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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1a0d74e664
The logic for calculating the value with which we call kvm_set_cr0/4 was broken (will definitely be visible with nested unrestricted guest mode support). Also, we performed the check regarding CR0_ALWAYSON too early when in guest mode. What really needs to be done on both CR0 and CR4 is to mask out L1-owned bits and merge them in from L1's guest_cr0/4. In contrast, arch.cr0/4 and arch.cr0/4_guest_owned_bits contain the mangled L0+L1 state and, thus, are not suited as input. For both CRs, we can then apply the check against VMXON_CRx_ALWAYSON and refuse the update if it fails. To be fully consistent, we implement this check now also for CR4. For CR4, we move the check into vmx_set_cr4 while we keep it in handle_set_cr0. This is because the CR0 checks for vmxon vs. guest mode will diverge soon when adding unrestricted guest mode support. Finally, we have to set the shadow to the value L2 wanted to write originally. Reviewed-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> |
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| .. | ||
| boot | ||
| configs | ||
| crypto | ||
| ia32 | ||
| include | ||
| kernel | ||
| kvm | ||
| lguest | ||
| lib | ||
| math-emu | ||
| mm | ||
| net | ||
| oprofile | ||
| pci | ||
| platform | ||
| power | ||
| realmode | ||
| syscalls | ||
| tools | ||
| um | ||
| vdso | ||
| video | ||
| xen | ||
| .gitignore | ||
| Kbuild | ||
| Kconfig | ||
| Kconfig.cpu | ||
| Kconfig.debug | ||
| Makefile | ||
| Makefile_32.cpu | ||
| Makefile.um | ||