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SubjectRe: [PATCH v13 5/6] KVM: s390: pv: support for Destroy fast UVC
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On 8/10/22 14:56, Claudio Imbrenda wrote:
> Add support for the Destroy Secure Configuration Fast Ultravisor call,
> and take advantage of it for asynchronous destroy.
>
> When supported, the protected guest is destroyed immediately using the
> new UVC, leaving only the memory to be cleaned up asynchronously.
>
> Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>

Reviewed-by: Janosch Frank <frankja@linux.ibm.com>

> ---
> arch/s390/include/asm/uv.h | 10 +++++++
> arch/s390/kvm/pv.c | 57 ++++++++++++++++++++++++++++++++------
> 2 files changed, 59 insertions(+), 8 deletions(-)
>
> diff --git a/arch/s390/include/asm/uv.h b/arch/s390/include/asm/uv.h
> index be3ef9dd6972..28a9ad57b6f1 100644
> --- a/arch/s390/include/asm/uv.h
> +++ b/arch/s390/include/asm/uv.h
> @@ -34,6 +34,7 @@
> #define UVC_CMD_INIT_UV 0x000f
> #define UVC_CMD_CREATE_SEC_CONF 0x0100
> #define UVC_CMD_DESTROY_SEC_CONF 0x0101
> +#define UVC_CMD_DESTROY_SEC_CONF_FAST 0x0102
> #define UVC_CMD_CREATE_SEC_CPU 0x0120
> #define UVC_CMD_DESTROY_SEC_CPU 0x0121
> #define UVC_CMD_CONV_TO_SEC_STOR 0x0200
> @@ -81,6 +82,7 @@ enum uv_cmds_inst {
> BIT_UVC_CMD_UNSHARE_ALL = 20,
> BIT_UVC_CMD_PIN_PAGE_SHARED = 21,
> BIT_UVC_CMD_UNPIN_PAGE_SHARED = 22,
> + BIT_UVC_CMD_DESTROY_SEC_CONF_FAST = 23,
> BIT_UVC_CMD_DUMP_INIT = 24,
> BIT_UVC_CMD_DUMP_CONFIG_STOR_STATE = 25,
> BIT_UVC_CMD_DUMP_CPU = 26,
> @@ -230,6 +232,14 @@ struct uv_cb_nodata {
> u64 reserved20[4];
> } __packed __aligned(8);
>
> +/* Destroy Configuration Fast */
> +struct uv_cb_destroy_fast {
> + struct uv_cb_header header;
> + u64 reserved08[2];
> + u64 handle;
> + u64 reserved20[5];
> +} __packed __aligned(8);

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