lkml.org 
[lkml]   [2021]   [Jul]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH Part2 RFC v4 14/40] crypto:ccp: Provide APIs to issue SEV-SNP commands
    Date
    Provide the APIs for the hypervisor to manage an SEV-SNP guest. The
    commands for SEV-SNP is defined in the SEV-SNP firmware specification.

    Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
    ---
    drivers/crypto/ccp/sev-dev.c | 24 ++++++++++++
    include/linux/psp-sev.h | 74 ++++++++++++++++++++++++++++++++++++
    2 files changed, 98 insertions(+)

    diff --git a/drivers/crypto/ccp/sev-dev.c b/drivers/crypto/ccp/sev-dev.c
    index 84c91bab00bd..ad9a0c8111e0 100644
    --- a/drivers/crypto/ccp/sev-dev.c
    +++ b/drivers/crypto/ccp/sev-dev.c
    @@ -1017,6 +1017,30 @@ int sev_guest_df_flush(int *error)
    }
    EXPORT_SYMBOL_GPL(sev_guest_df_flush);

    +int snp_guest_decommission(struct sev_data_snp_decommission *data, int *error)
    +{
    + return sev_do_cmd(SEV_CMD_SNP_DECOMMISSION, data, error);
    +}
    +EXPORT_SYMBOL_GPL(snp_guest_decommission);
    +
    +int snp_guest_df_flush(int *error)
    +{
    + return sev_do_cmd(SEV_CMD_SNP_DF_FLUSH, NULL, error);
    +}
    +EXPORT_SYMBOL_GPL(snp_guest_df_flush);
    +
    +int snp_guest_page_reclaim(struct sev_data_snp_page_reclaim *data, int *error)
    +{
    + return sev_do_cmd(SEV_CMD_SNP_PAGE_RECLAIM, data, error);
    +}
    +EXPORT_SYMBOL_GPL(snp_guest_page_reclaim);
    +
    +int snp_guest_dbg_decrypt(struct sev_data_snp_dbg *data, int *error)
    +{
    + return sev_do_cmd(SEV_CMD_SNP_DBG_DECRYPT, data, error);
    +}
    +EXPORT_SYMBOL_GPL(snp_guest_dbg_decrypt);
    +
    static void sev_exit(struct kref *ref)
    {
    misc_deregister(&misc_dev->misc);
    diff --git a/include/linux/psp-sev.h b/include/linux/psp-sev.h
    index 1b53e8782250..63ef766cbd7a 100644
    --- a/include/linux/psp-sev.h
    +++ b/include/linux/psp-sev.h
    @@ -860,6 +860,65 @@ int sev_guest_df_flush(int *error);
    */
    int sev_guest_decommission(struct sev_data_decommission *data, int *error);

    +/**
    + * snp_guest_df_flush - perform SNP DF_FLUSH command
    + *
    + * @sev_ret: sev command return code
    + *
    + * Returns:
    + * 0 if the sev successfully processed the command
    + * -%ENODEV if the sev device is not available
    + * -%ENOTSUPP if the sev does not support SEV
    + * -%ETIMEDOUT if the sev command timed out
    + * -%EIO if the sev returned a non-zero return code
    + */
    +int snp_guest_df_flush(int *error);
    +
    +/**
    + * snp_guest_decommission - perform SNP_DECOMMISSION command
    + *
    + * @decommission: sev_data_decommission structure to be processed
    + * @sev_ret: sev command return code
    + *
    + * Returns:
    + * 0 if the sev successfully processed the command
    + * -%ENODEV if the sev device is not available
    + * -%ENOTSUPP if the sev does not support SEV
    + * -%ETIMEDOUT if the sev command timed out
    + * -%EIO if the sev returned a non-zero return code
    + */
    +int snp_guest_decommission(struct sev_data_snp_decommission *data, int *error);
    +
    +/**
    + * snp_guest_page_reclaim - perform SNP_PAGE_RECLAIM command
    + *
    + * @decommission: sev_snp_page_reclaim structure to be processed
    + * @sev_ret: sev command return code
    + *
    + * Returns:
    + * 0 if the sev successfully processed the command
    + * -%ENODEV if the sev device is not available
    + * -%ENOTSUPP if the sev does not support SEV
    + * -%ETIMEDOUT if the sev command timed out
    + * -%EIO if the sev returned a non-zero return code
    + */
    +int snp_guest_page_reclaim(struct sev_data_snp_page_reclaim *data, int *error);
    +
    +/**
    + * snp_guest_dbg_decrypt - perform SEV SNP_DBG_DECRYPT command
    + *
    + * @sev_ret: sev command return code
    + *
    + * Returns:
    + * 0 if the sev successfully processed the command
    + * -%ENODEV if the sev device is not available
    + * -%ENOTSUPP if the sev does not support SEV
    + * -%ETIMEDOUT if the sev command timed out
    + * -%EIO if the sev returned a non-zero return code
    + */
    +int snp_guest_dbg_decrypt(struct sev_data_snp_dbg *data, int *error);
    +
    +
    void *psp_copy_user_blob(u64 uaddr, u32 len);

    #else /* !CONFIG_CRYPTO_DEV_SP_PSP */
    @@ -887,6 +946,21 @@ sev_issue_cmd_external_user(struct file *filep, unsigned int id, void *data, int

    static inline void *psp_copy_user_blob(u64 __user uaddr, u32 len) { return ERR_PTR(-EINVAL); }

    +static inline int
    +snp_guest_decommission(struct sev_data_snp_decommission *data, int *error) { return -ENODEV; }
    +
    +static inline int snp_guest_df_flush(int *error) { return -ENODEV; }
    +
    +static inline int snp_guest_page_reclaim(struct sev_data_snp_page_reclaim *data, int *error)
    +{
    + return -ENODEV;
    +}
    +
    +static inline int snp_guest_dbg_decrypt(struct sev_data_snp_dbg *data, int *error)
    +{
    + return -ENODEV;
    +}
    +
    #endif /* CONFIG_CRYPTO_DEV_SP_PSP */

    #endif /* __PSP_SEV_H__ */
    --
    2.17.1
    \
     
     \ /
      Last update: 2021-07-07 20:39    [W:4.161 / U:0.360 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site