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Re: [PATCH 5/6] hw/cxl: Add poison injection via the mailbox.
From: |
Ira Weiny |
Subject: |
Re: [PATCH 5/6] hw/cxl: Add poison injection via the mailbox. |
Date: |
Tue, 21 Feb 2023 17:18:01 -0800 |
Jonathan Cameron wrote:
> Very simple implementation to allow testing of corresponding
> kernel code. Note that for now we track each 64 byte section
> independently. Whilst a valid implementation choice, it may
> make sense to fuse entries so as to prove out more complex
> corners of the kernel code.
>
> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> ---
> hw/cxl/cxl-mailbox-utils.c | 40 ++++++++++++++++++++++++++++++++++++++
> 1 file changed, 40 insertions(+)
>
> diff --git a/hw/cxl/cxl-mailbox-utils.c b/hw/cxl/cxl-mailbox-utils.c
> index cf3cfb10a1..7d3f7bcd3a 100644
> --- a/hw/cxl/cxl-mailbox-utils.c
> +++ b/hw/cxl/cxl-mailbox-utils.c
> @@ -64,6 +64,7 @@ enum {
> #define SET_LSA 0x3
> MEDIA_AND_POISON = 0x43,
> #define GET_POISON_LIST 0x0
> + #define INJECT_POISON 0x1
> };
>
> struct cxl_cmd;
> @@ -436,6 +437,43 @@ static CXLRetCode cmd_media_get_poison_list(struct
> cxl_cmd *cmd,
> return CXL_MBOX_SUCCESS;
> }
>
> +static CXLRetCode cmd_media_inject_poison(struct cxl_cmd *cmd,
> + CXLDeviceState *cxl_dstate,
> + uint16_t *len)
> +{
> + CXLType3Dev *ct3d = container_of(cxl_dstate, CXLType3Dev, cxl_dstate);
> + CXLPoisonList *poison_list = &ct3d->poison_list;
> + CXLPoison *ent;
> + struct inject_poison_pl {
> + uint64_t dpa;
> + };
> + struct inject_poison_pl *in = (void *)cmd->payload;
> + CXLPoison *p;
> +
> + QLIST_FOREACH(ent, poison_list, node) {
> + if (ent->start == in->dpa && ent->length == 64) {
How does this interact with the QMP inject poison? Should this be
checking the range of the entries?
Ira
> + return CXL_MBOX_SUCCESS;
> + }
> + }
> +
> + if (ct3d->poison_list_cnt == CXL_POISON_LIST_LIMIT) {
> + return CXL_MBOX_INJECT_POISON_LIMIT;
> + }
> + p = g_new0(CXLPoison, 1);
> +
> + p->length = 64;
> + p->start = in->dpa;
> + p->type = CXL_POISON_TYPE_INJECTED;
> +
> + /*
> + * Possible todo: Merge with existing entry if next to it and if same
> type
> + */
> + QLIST_INSERT_HEAD(poison_list, p, node);
> + ct3d->poison_list_cnt++;
> +
> + return CXL_MBOX_SUCCESS;
> +}
> +
> #define IMMEDIATE_CONFIG_CHANGE (1 << 1)
> #define IMMEDIATE_DATA_CHANGE (1 << 2)
> #define IMMEDIATE_POLICY_CHANGE (1 << 3)
> @@ -465,6 +503,8 @@ static struct cxl_cmd cxl_cmd_set[256][256] = {
> ~0, IMMEDIATE_CONFIG_CHANGE | IMMEDIATE_DATA_CHANGE },
> [MEDIA_AND_POISON][GET_POISON_LIST] = {
> "MEDIA_AND_POISON_GET_POISON_LIST",
> cmd_media_get_poison_list, 16, 0 },
> + [MEDIA_AND_POISON][INJECT_POISON] = { "MEDIA_AND_POISON_INJECT_POISON",
> + cmd_media_inject_poison, 8, 0 },
> };
>
> void cxl_process_mailbox(CXLDeviceState *cxl_dstate)
> --
> 2.37.2
>
- [PATCH 1/6] hw/cxl: Move enum ret_code definition to cxl_device.h, (continued)
- [PATCH 1/6] hw/cxl: Move enum ret_code definition to cxl_device.h, Jonathan Cameron, 2023/02/17
- [PATCH 2/6] hw/cxl: rename mailbox return code type from ret_code to CXLRetCode, Jonathan Cameron, 2023/02/17
- [PATCH 3/6] hw/cxl: Introduce cxl_device_get_timestamp() utility function, Jonathan Cameron, 2023/02/17
- [PATCH 4/6] hw/cxl: QMP based poison injection support, Jonathan Cameron, 2023/02/17
- [PATCH 5/6] hw/cxl: Add poison injection via the mailbox., Jonathan Cameron, 2023/02/17
- Re: [PATCH 5/6] hw/cxl: Add poison injection via the mailbox.,
Ira Weiny <=
- [PATCH 6/6] hw/cxl: Add clear poison mailbox command support., Jonathan Cameron, 2023/02/17