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hyperv: simplify and rename generate_guest_id 

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@nfschina.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/20220928064046.3545-1-kunyu@nfschina.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
This commit is contained in:
Li kunyu 2022-09-28 14:40:46 +08:00 committed by Wei Liu
parent fb2d14add4
commit d5ebde1e2b
3 changed files with 5 additions and 8 deletions
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2
arch/arm64/hyperv/mshyperv.c
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@ -38,7 +38,7 @@ static int __init hyperv_init(void)
return 0; return 0;
/* Setup the guest ID */ /* 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); hv_set_vpreg(HV_REGISTER_GUEST_OSID, guest_id);
/* Get the features and hints from Hyper-V */ /* Get the features and hints from Hyper-V */

2
arch/x86/hyperv/hv_init.c
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@ -426,7 +426,7 @@ void __init hyperv_init(void)
* 1. Register the guest ID * 1. Register the guest ID
* 2. Enable the hypercall and register the hypercall page * 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); wrmsrl(HV_X64_MSR_GUEST_OS_ID, guest_id);
/* Hyper-V requires to write guest os id via ghcb in SNP IVM. */ /* Hyper-V requires to write guest os id via ghcb in SNP IVM. */

9
include/asm-generic/mshyperv.h
View File

@ -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 */ /* Generate the guest OS identifier as described in the Hyper-V TLFS */
static inline __u64 generate_guest_id(__u64 d_info1, __u64 kernel_version, static inline u64 hv_generate_guest_id(u64 kernel_version)
__u64 d_info2)
{ {
__u64 guest_id = 0; u64 guest_id;
guest_id = (((__u64)HV_LINUX_VENDOR_ID) << 48); guest_id = (((u64)HV_LINUX_VENDOR_ID) << 48);
guest_id |= (d_info1 << 48);
guest_id |= (kernel_version << 16); guest_id |= (kernel_version << 16);
guest_id |= d_info2;
return guest_id; return guest_id;
} }