From: Li kunyu <kunyu@xxxxxxxxxxxx> Sent: Tuesday, September 27, 2022 11:41 PM
>
> The generate_guest_id function is more suitable for use after the
> following modifications.
> 1. The return value of the function is modified to u64.
> 2. Remove the d_info1 and d_info2 parameters from the function, keep the
> u64 type kernel_version parameter.
> 3. Rename the function to make it clearly a Hyper-V related function,
> and modify it to hv_generate_guest_id.
>
> Signed-off-by: Li kunyu <kunyu@xxxxxxxxxxxx>
>
> --------
> v2: Fix generate_guest_id to hv_generate_guest_id.
> v3: Fix [PATCH v2] asm-generic: Remove the ... to [PATCH v3] hyperv: simp
> lify ... and remove extra spaces
> v4: Remove #include <linux/version.h> in the calling file, and add #inclu
> de <linux/version.h> in the function implementation file
> v5: <linux/version.h> is changed to the definition position before v4, an
> d the LINUX_VERSION_CODE macro is passed in the function call
> v6: Modify the patch description information to the changed information a
> fter discussion
> ---
> arch/arm64/hyperv/mshyperv.c | 2 +-
> arch/x86/hyperv/hv_init.c | 2 +-
> include/asm-generic/mshyperv.h | 9 +++------
> 3 files changed, 5 insertions(+), 8 deletions(-)
>
> diff --git a/arch/arm64/hyperv/mshyperv.c b/arch/arm64/hyperv/mshyperv.c
> index bbbe351e9045..a406454578f0 100644
> --- a/arch/arm64/hyperv/mshyperv.c
> +++ b/arch/arm64/hyperv/mshyperv.c
> @@ -38,7 +38,7 @@ static int __init hyperv_init(void)
> return 0;
>
> /* Setup the guest ID */
> - guest_id = generate_guest_id(0, LINUX_VERSION_CODE, 0);
> + guest_id = hv_generate_guest_id(LINUX_VERSION_CODE);
> hv_set_vpreg(HV_REGISTER_GUEST_OSID, guest_id);
>
> /* Get the features and hints from Hyper-V */
> diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c
> index 3de6d8b53367..032d85ac33fa 100644
> --- a/arch/x86/hyperv/hv_init.c
> +++ b/arch/x86/hyperv/hv_init.c
> @@ -426,7 +426,7 @@ void __init hyperv_init(void)
> * 1. Register the guest ID
> * 2. Enable the hypercall and register the hypercall page
> */
> - guest_id = generate_guest_id(0, LINUX_VERSION_CODE, 0);
> + guest_id = hv_generate_guest_id(LINUX_VERSION_CODE);
> wrmsrl(HV_X64_MSR_GUEST_OS_ID, guest_id);
>
> /* Hyper-V requires to write guest os id via ghcb in SNP IVM. */
> diff --git a/include/asm-generic/mshyperv.h b/include/asm-generic/mshyperv.h
> index c05d2ce9b6cd..bfb9eb9d7215 100644
> --- a/include/asm-generic/mshyperv.h
> +++ b/include/asm-generic/mshyperv.h
> @@ -105,15 +105,12 @@ static inline u64 hv_do_rep_hypercall(u16 code, u16 rep_count, u16 varhead_size,
> }
>
> /* Generate the guest OS identifier as described in the Hyper-V TLFS */
> -static inline __u64 generate_guest_id(__u64 d_info1, __u64 kernel_version,
> - __u64 d_info2)
> +static inline u64 hv_generate_guest_id(u64 kernel_version)
> {
> - __u64 guest_id = 0;
> + u64 guest_id;
>
> - guest_id = (((__u64)HV_LINUX_VENDOR_ID) << 48);
> - guest_id |= (d_info1 << 48);
> + guest_id = (((u64)HV_LINUX_VENDOR_ID) << 48);
> guest_id |= (kernel_version << 16);
> - guest_id |= d_info2;
>
> return guest_id;
> }
> --
> 2.18.2
Reviewed-by: Michael Kelley <mikelley@xxxxxxxxxxxxx>
