44 lines
1.7 KiB
Diff
44 lines
1.7 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Zhao Yakui <yakui.zhao@intel.com>
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Date: Fri, 2 Aug 2019 11:05:31 +0800
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Subject: [PATCH] i915/gvt: obtain power domain to take the snapshot of gvt
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registers correctly
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When the VGPU workload is submitted, it needs to check whether the some
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vgpu registers are consistent with that in gvt registers. The gvt register
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is captured without holding the corresponding power domain. In such case
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the snapshot of some registers are incorrect and it complains the
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unconformance mmio access on VGPU.
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Change-Id: I773b8de2734c293e387546923fa929b553d57b2e
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Tracked-On: projectacrn/acrn-hypervisor#3520
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Reviewed-by: He Min <min.he@intel.com>
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Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
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---
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drivers/gpu/drm/i915/gvt/mmio_context.c | 2 ++
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1 file changed, 2 insertions(+)
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diff --git a/drivers/gpu/drm/i915/gvt/mmio_context.c b/drivers/gpu/drm/i915/gvt/mmio_context.c
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index 4e99cd0e4fbe..a69263163e34 100644
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--- a/drivers/gpu/drm/i915/gvt/mmio_context.c
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+++ b/drivers/gpu/drm/i915/gvt/mmio_context.c
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@@ -619,6 +619,7 @@ static void get_host_mmio_snapshot(struct intel_gvt *gvt)
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mmio_list = gvt->engine_mmio_list.mmio;
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if (!gvt->mmio.host_cache_initialized) {
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+ intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
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/* Snapshot all the non-context MMIOs */
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for (mmio = mmio_list; i915_mmio_reg_valid(mmio->reg); mmio++) {
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if (mmio->in_context)
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@@ -630,6 +631,7 @@ static void get_host_mmio_snapshot(struct intel_gvt *gvt)
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gvt_host_reg(gvt, mmio->reg.reg) &= mmio->mask;
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}
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gvt->mmio.host_cache_initialized = true;
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+ intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
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}
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}
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--
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https://clearlinux.org
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