Messages in this thread Patch in this message | | | Date | Wed, 7 Apr 2021 18:09:33 +0200 | From | Borislav Petkov <> | Subject | Re: [PATCH 1/7] hyperv: Detect Nested virtualization support for SVM |
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On Wed, Apr 07, 2021 at 02:41:22PM +0000, Vineeth Pillai wrote: > Detect nested features exposed by Hyper-V if SVM is enabled. > > Signed-off-by: Vineeth Pillai <viremana@linux.microsoft.com> > --- > arch/x86/kernel/cpu/mshyperv.c | 10 +++++++++- > 1 file changed, 9 insertions(+), 1 deletion(-) > > diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c > index 3546d3e21787..4d364acfe95d 100644 > --- a/arch/x86/kernel/cpu/mshyperv.c > +++ b/arch/x86/kernel/cpu/mshyperv.c > @@ -325,9 +325,17 @@ static void __init ms_hyperv_init_platform(void) > ms_hyperv.isolation_config_a, ms_hyperv.isolation_config_b); > } > > - if (ms_hyperv.hints & HV_X64_ENLIGHTENED_VMCS_RECOMMENDED) { > + /* > + * AMD does not need enlightened VMCS as VMCB is already a > + * datastructure in memory. We need to get the nested > + * features if SVM is enabled. > + */ > + if (boot_cpu_has(X86_FEATURE_SVM) ||
Pls use:
cpu_feature_enabled
here.
-- Regards/Gruss, Boris.
https://people.kernel.org/tglx/notes-about-netiquette
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