Messages in this thread | | | Date | Wed, 8 Dec 2021 23:12:37 +0800 | Subject | Re: [PATCH V6.1] x86/hyper-v: Add hyperv Isolation VM check in the cc_platform_has() | From | Tianyu Lan <> |
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On 12/8/2021 10:52 PM, Tianyu Lan wrote: > From: Tianyu Lan <Tianyu.Lan@microsoft.com> > > Hyper-V provides Isolation VM which encrypt guest memory. In > isolation VM, swiotlb bounce buffer size needs to adjust > according to memory size in the sev_setup_arch(). Add GUEST_MEM_ > ENCRYPT check in the Isolation VM. > > Signed-off-by: Tianyu Lan <Tianyu.Lan@microsoft.com>
Hi Boris: Could you check whether this version is ok with you?
Thanks.
> --- > Change since v6: > * Change the order in the cc_platform_has() and check sev first. > > Change since v3: > * Change code style of checking GUEST_MEM attribute in the > hyperv_cc_platform_has(). > --- > arch/x86/kernel/cc_platform.c | 8 ++++++++ > 1 file changed, 8 insertions(+) > > diff --git a/arch/x86/kernel/cc_platform.c b/arch/x86/kernel/cc_platform.c > index 03bb2f343ddb..6cb3a675e686 100644 > --- a/arch/x86/kernel/cc_platform.c > +++ b/arch/x86/kernel/cc_platform.c > @@ -11,6 +11,7 @@ > #include <linux/cc_platform.h> > #include <linux/mem_encrypt.h> > > +#include <asm/mshyperv.h> > #include <asm/processor.h> > > static bool __maybe_unused intel_cc_platform_has(enum cc_attr attr) > @@ -58,12 +59,19 @@ static bool amd_cc_platform_has(enum cc_attr attr) > #endif > } > > +static bool hyperv_cc_platform_has(enum cc_attr attr) > +{ > + return attr == CC_ATTR_GUEST_MEM_ENCRYPT; > +} > > bool cc_platform_has(enum cc_attr attr) > { > if (sme_me_mask) > return amd_cc_platform_has(attr); > > + if (hv_is_isolation_supported()) > + return hyperv_cc_platform_has(attr); > + > return false; > } > EXPORT_SYMBOL_GPL(cc_platform_has); >
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