[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH V2 3/6] x86/hyper-v: Add hyperv Isolation VM check in the cc_platform_has()
From: Tianyu Lan <Tianyu.Lan@xxxxxxxxxxxxx> Hyper-V provides Isolation VM which has memory encrypt support. Add hyperv_cc_platform_has() and return true for check of GUEST_MEM_ENCRYPT attribute. Signed-off-by: Tianyu Lan <Tianyu.Lan@xxxxxxxxxxxxx> --- arch/x86/kernel/cc_platform.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/arch/x86/kernel/cc_platform.c b/arch/x86/kernel/cc_platform.c index 03bb2f343ddb..f3bb0431f5c5 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) @@ -58,9 +59,23 @@ static bool amd_cc_platform_has(enum cc_attr attr) #endif } +static bool hyperv_cc_platform_has(enum cc_attr attr) +{ +#ifdef CONFIG_HYPERV + if (attr == CC_ATTR_GUEST_MEM_ENCRYPT) + return true; + else + return false; +#else + return false; +#endif +} bool cc_platform_has(enum cc_attr attr) { + if (hv_is_isolation_supported()) + return hyperv_cc_platform_has(attr); + if (sme_me_mask) return amd_cc_platform_has(attr); -- 2.25.1
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