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From: "Bernatowicz, Marcin" <marcin.bernatowicz@linux.intel.com>
To: Lukasz Laguna <lukasz.laguna@intel.com>, igt-dev@lists.freedesktop.org
Cc: marcin.bernatowicz@intel.com
Subject: Re: [PATCH 2/2] tests/intel/xe_sriov_flr: Extend GGTT clearing checks
Date: Mon, 3 Aug 2026 14:26:08 +0200	[thread overview]
Message-ID: <ea3f0b58-2790-49cf-91b5-db1c067b982a@linux.intel.com> (raw)
In-Reply-To: <20260730093807.926456-3-lukasz.laguna@intel.com>


On 7/30/2026 11:38 AM, Lukasz Laguna wrote:
> In addition to GPA clearing, verify that VFID and the page present bit
> are correctly set after VF FLR.
>
> Signed-off-by: Lukasz Laguna <lukasz.laguna@intel.com>
> ---
>   lib/xe/xe_ggtt.c           | 15 +++++++++++++++
>   lib/xe/xe_ggtt.h           |  9 +++++++++
>   tests/intel/xe_sriov_flr.c | 21 +++++++++++++++++++++
>   3 files changed, 45 insertions(+)
>
> diff --git a/lib/xe/xe_ggtt.c b/lib/xe/xe_ggtt.c
> index 96b189b7a..8a98e9027 100644
> --- a/lib/xe/xe_ggtt.c
> +++ b/lib/xe/xe_ggtt.c
> @@ -6,6 +6,14 @@
>   #include "igt.h"
>   #include "xe/xe_ggtt.h"
>   
> +xe_ggtt_pte_mask_t xe_ggtt_get_vfid_mask(int pf_fd)
> +{
> +	uint16_t dev_id = intel_get_drm_devid(pf_fd);
> +
> +	return (intel_graphics_ver(dev_id) >= IP_VER(12, 50)) ?
> +		GGTT_PTE_VFID_MASK : TGL_GGTT_PTE_VFID_MASK;
> +}
> +
>   xe_ggtt_pte_mask_t xe_ggtt_get_gpa_mask(int pf_fd)
>   {
>   	if (IS_TIGERLAKE(intel_get_drm_devid(pf_fd)))
> @@ -14,6 +22,13 @@ xe_ggtt_pte_mask_t xe_ggtt_get_gpa_mask(int pf_fd)
>   	return GGTT_PTE_ADDR_MASK;
>   }
>   
> +uint8_t xe_ggtt_pte_get_vfid(int pf_fd, xe_ggtt_pte_t pte)
> +{
> +	xe_ggtt_pte_mask_t mask = xe_ggtt_get_vfid_mask(pf_fd);
> +
> +	return (uint8_t)((pte & mask) >> GGTT_PTE_VFID_SHIFT);
> +}
> +
>   uint64_t xe_ggtt_pte_get_gpa(int pf_fd, xe_ggtt_pte_t pte)
>   {
>   	xe_ggtt_pte_mask_t mask = xe_ggtt_get_gpa_mask(pf_fd);
> diff --git a/lib/xe/xe_ggtt.h b/lib/xe/xe_ggtt.h
> index 5e4038591..ada7ddbb0 100644
> --- a/lib/xe/xe_ggtt.h
> +++ b/lib/xe/xe_ggtt.h
> @@ -12,10 +12,19 @@
>   #define TGL_GGTT_PTE_ADDR_MASK		GENMASK_ULL(38, 12)
>   #define   GGTT_PTE_ADDR_SHIFT		12
>   
> +#define GGTT_PTE_VFID_MASK		GENMASK_ULL(11, 2)
> +#define TGL_GGTT_PTE_VFID_MASK		GENMASK_ULL(4, 2)
> +#define   GGTT_PTE_VFID_SHIFT		2
> +
> +#define GGTT_PAGE_PRESENT		GENMASK_ULL(0, 0)
> +
>   typedef uint64_t xe_ggtt_pte_t;
>   typedef uint64_t xe_ggtt_pte_mask_t;
>   
> +xe_ggtt_pte_mask_t xe_ggtt_get_vfid_mask(int pf_fd);
>   xe_ggtt_pte_mask_t xe_ggtt_get_gpa_mask(int pf_fd);
> +
> +uint8_t xe_ggtt_pte_get_vfid(int pf_fd, xe_ggtt_pte_t pte);
>   uint64_t xe_ggtt_pte_get_gpa(int pf_fd, xe_ggtt_pte_t pte);
>   
>   #endif /* __XE_GGTT_H__ */
> diff --git a/tests/intel/xe_sriov_flr.c b/tests/intel/xe_sriov_flr.c
> index 556979d7b..34a379586 100644
> --- a/tests/intel/xe_sriov_flr.c
> +++ b/tests/intel/xe_sriov_flr.c
> @@ -709,6 +709,16 @@ static bool check_pte_gpa(int pf_fd, xe_ggtt_pte_t pte, uint8_t expected)
>   	return (xe_ggtt_pte_get_gpa(pf_fd, pte) == expected);
>   }
>   
> +static bool check_pte_vfid(int pf_fd, xe_ggtt_pte_t pte, uint8_t expected)
> +{
> +	return (xe_ggtt_pte_get_vfid(pf_fd, pte) == expected);
> +}
> +
> +static bool check_pte_valid(int pf_fd, xe_ggtt_pte_t pte)
> +{
> +	return (pte & GGTT_PAGE_PRESENT);
> +}
> +
>   static int populate_ggtt_pte_offsets(struct ggtt_data *gdata)
>   {
>   	int ret, pf_fd = gdata->base.pf_fd, num_vfs = gdata->base.num_vfs;
> @@ -828,6 +838,17 @@ static void ggtt_subcheck_verify_vf(int vf_id, int flr_vf_id, struct subcheck_da
>   			failed = true;
>   		}
>   
> +		if (!check_pte_vfid(pf_fd, pte, vf_id)) {
> +			igt_debug("Wrong GGTT VFID on VF%u after VF%u FLR\n", vf_id, flr_vf_id);
> +			failed = true;
> +		}
> +
> +		if (!check_pte_valid(pf_fd, pte)) {
> +			igt_debug("GGTT page present bit not set on VF%u after VF%u FLR\n",
> +				  vf_id, flr_vf_id);
> +			failed = true;
> +		}
> +

LGTM,

Reviewed-by: Marcin Bernatowicz <marcin.bernatowicz@linux.intel.com>

>   		if (failed) {
>   			set_fail_reason(data,
>   					"GGTT check after VF%u FLR failed on VF%u: Read PTE: %#" PRIx64 " at offset: %#x\n",

  reply	other threads:[~2026-08-03 12:26 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-07-30  9:38 [PATCH 0/2] tests/intel/xe_sriov_flr: Extend GGTT clearing checks Lukasz Laguna
2026-07-30  9:38 ` [PATCH 1/2] lib/xe/xe_ggtt: Extract generic GGTT code into library Lukasz Laguna
2026-08-03 12:24   ` Bernatowicz, Marcin
2026-07-30  9:38 ` [PATCH 2/2] tests/intel/xe_sriov_flr: Extend GGTT clearing checks Lukasz Laguna
2026-08-03 12:26   ` Bernatowicz, Marcin [this message]
2026-07-30 13:43 ` ✓ Xe.CI.BAT: success for " Patchwork
2026-07-30 13:45 ` ✓ i915.CI.BAT: " Patchwork
2026-07-30 16:38 ` ✓ Xe.CI.FULL: " Patchwork
2026-07-30 19:22 ` ✗ i915.CI.Full: failure " Patchwork

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