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    SubjectRe: [RFC PATCH V3 09/16] x86/hyperv: SEV-SNP enlightened guest don't support legacy rtc
    On Sat, Jan 21, 2023 at 09:45:59PM -0500, Tianyu Lan wrote:
    > From: Tianyu Lan <tiala@microsoft.com>
    >
    > SEV-SNP enlightened guest doesn't support legacy rtc. Set
    > legacy.rtc, x86_platform.set_wallclock and get_wallclock to
    > 0 or noop(). Make get/set_rtc_noop() to be public and reuse
    > them in the ms_hyperv_init_platform().
    >
    > Signed-off-by: Tianyu Lan <tiala@microsoft.com>
    > ---
    > arch/x86/include/asm/mshyperv.h | 7 ++++++-
    > arch/x86/include/asm/x86_init.h | 2 ++
    > arch/x86/kernel/cpu/mshyperv.c | 3 +++
    > arch/x86/kernel/x86_init.c | 4 ++--
    > 4 files changed, 13 insertions(+), 3 deletions(-)
    >
    > diff --git a/arch/x86/include/asm/mshyperv.h b/arch/x86/include/asm/mshyperv.h
    > index 1a4af0a4f29a..7266d71d30d6 100644
    > --- a/arch/x86/include/asm/mshyperv.h
    > +++ b/arch/x86/include/asm/mshyperv.h
    > @@ -33,6 +33,12 @@ extern bool hv_isolation_type_en_snp(void);
    >
    > extern union hv_ghcb * __percpu *hv_ghcb_pg;
    >
    > +/*
    > + * Hyper-V puts processor and memory layout info
    > + * to this address in SEV-SNP enlightened guest.
    > + */
    > +#define EN_SEV_SNP_PROCESSOR_INFO_ADDR 0x802000

    This hunk should be moved to the previous patch. It is not needed in
    this patch.

    Thanks,
    Wei.

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