6.15-stable review patch. If anyone has any objections, please let me know.
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From: Nikunj A Dadhania nikunj@amd.com
commit 51a4273dcab39dd1e850870945ccec664352d383 upstream.
The sev_data_snp_launch_start structure should include a 4-byte desired_tsc_khz field before the gosvw field, which was missed in the initial implementation. As a result, the structure is 4 bytes shorter than expected by the firmware, causing the gosvw field to start 4 bytes early. Fix this by adding the missing 4-byte member for the desired TSC frequency.
Fixes: 3a45dc2b419e ("crypto: ccp: Define the SEV-SNP commands") Cc: stable@vger.kernel.org Suggested-by: Tom Lendacky thomas.lendacky@amd.com Reviewed-by: Tom Lendacky thomas.lendacky@amd.com Tested-by: Vaishali Thakkar vaishali.thakkar@suse.com Signed-off-by: Nikunj A Dadhania nikunj@amd.com Link: https://lore.kernel.org/r/20250408093213.57962-3-nikunj@amd.com Signed-off-by: Sean Christopherson seanjc@google.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- include/linux/psp-sev.h | 2 ++ 1 file changed, 2 insertions(+)
--- a/include/linux/psp-sev.h +++ b/include/linux/psp-sev.h @@ -594,6 +594,7 @@ struct sev_data_snp_addr { * @imi_en: launch flow is launching an IMI (Incoming Migration Image) for the * purpose of guest-assisted migration. * @rsvd: reserved + * @desired_tsc_khz: hypervisor desired mean TSC freq in kHz of the guest * @gosvw: guest OS-visible workarounds, as defined by hypervisor */ struct sev_data_snp_launch_start { @@ -603,6 +604,7 @@ struct sev_data_snp_launch_start { u32 ma_en:1; /* In */ u32 imi_en:1; /* In */ u32 rsvd:30; + u32 desired_tsc_khz; /* In */ u8 gosvw[16]; /* In */ } __packed;