diff options
| author | Wei Huang <wei.huang2@amd.com> | 2021-08-18 11:55:49 -0500 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-08-20 16:07:56 -0400 |
| commit | 43e540cc9f2ca12a2364ddf64e5ef929a546550d (patch) | |
| tree | f847e57ddee4c8bd6ee674f50ecb13e5f190123f /arch | |
| parent | cb0f722aff6e9ba970a9fee9263c7821bbe811de (diff) | |
KVM: SVM: Add 5-level page table support for SVM
When the 5-level page table is enabled on host OS, the nested page table
for guest VMs must use 5-level as well. Update get_npt_level() function
to reflect this requirement. In the meanwhile, remove the code that
prevents kvm-amd driver from being loaded when 5-level page table is
detected.
Signed-off-by: Wei Huang <wei.huang2@amd.com>
Message-Id: <20210818165549.3771014-4-wei.huang2@amd.com>
[Tweak condition as suggested by Sean. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kvm/svm/svm.c | 7 |
1 files changed, 1 insertions, 6 deletions
diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c index bcffae2e36d2..1a70e11f0487 100644 --- a/arch/x86/kvm/svm/svm.c +++ b/arch/x86/kvm/svm/svm.c @@ -259,7 +259,7 @@ u32 svm_msrpm_offset(u32 msr) static int get_max_npt_level(void) { #ifdef CONFIG_X86_64 - return PT64_ROOT_4LEVEL; + return pgtable_l5_enabled() ? PT64_ROOT_5LEVEL : PT64_ROOT_4LEVEL; #else return PT32E_ROOT_LEVEL; #endif @@ -460,11 +460,6 @@ static int has_svm(void) return 0; } - if (pgtable_l5_enabled()) { - pr_info("KVM doesn't yet support 5-level paging on AMD SVM\n"); - return 0; - } - return 1; } |