From ac071578286ee9abd0243480631510d9f818144d Mon Sep 17 00:00:00 2001 From: Xiaolin Zhang Date: Wed, 3 Apr 2019 16:28:04 +0800 Subject: [PATCH] drm/i915/gvt: addressed guest GPU hang with HWS index mode with the introduce of "switch to use HWS indices rather than address", guest GPU hang observed when running workloads which will update the seqno to the real HW HWSP, not vitural GPU HWSP and then cause GPU hang. this patch is to revoke index mode in PIPE_CTRL and MI_FLUSH_DW and patch guest GPU HWSP address value to these commands. Fixes: 54939ea0bd85 ("drm/i915: Switch to use HWS indices rather than addresses") Reviewed-by: Zhenyu Wang Signed-off-by: Xiaolin Zhang Signed-off-by: Zhenyu Wang --- drivers/gpu/drm/i915/gvt/cmd_parser.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/drivers/gpu/drm/i915/gvt/cmd_parser.c b/drivers/gpu/drm/i915/gvt/cmd_parser.c index 57a92a86c63e..5a767180e430 100644 --- a/drivers/gpu/drm/i915/gvt/cmd_parser.c +++ b/drivers/gpu/drm/i915/gvt/cmd_parser.c @@ -1077,6 +1077,7 @@ static int cmd_handler_pipe_control(struct parser_exec_state *s) bool index_mode = false; unsigned int post_sync; int ret = 0; + u32 hws_pga, val; post_sync = (cmd_val(s, 1) & PIPE_CONTROL_POST_SYNC_OP_MASK) >> 14; @@ -1100,6 +1101,15 @@ static int cmd_handler_pipe_control(struct parser_exec_state *s) index_mode = true; ret |= cmd_address_audit(s, gma, sizeof(u64), index_mode); + if (ret) + return ret; + if (index_mode) { + hws_pga = s->vgpu->hws_pga[s->ring_id]; + gma = hws_pga + gma; + patch_value(s, cmd_ptr(s, 2), gma); + val = cmd_val(s, 1) & (~(1 << 21)); + patch_value(s, cmd_ptr(s, 1), val); + } } } } @@ -1569,6 +1579,7 @@ static int cmd_handler_mi_flush_dw(struct parser_exec_state *s) unsigned long gma; bool index_mode = false; int ret = 0; + u32 hws_pga, val; /* Check post-sync and ppgtt bit */ if (((cmd_val(s, 0) >> 14) & 0x3) && (cmd_val(s, 1) & (1 << 2))) { @@ -1579,6 +1590,15 @@ static int cmd_handler_mi_flush_dw(struct parser_exec_state *s) if (cmd_val(s, 0) & (1 << 21)) index_mode = true; ret = cmd_address_audit(s, gma, sizeof(u64), index_mode); + if (ret) + return ret; + if (index_mode) { + hws_pga = s->vgpu->hws_pga[s->ring_id]; + gma = hws_pga + gma; + patch_value(s, cmd_ptr(s, 1), gma); + val = cmd_val(s, 0) & (~(1 << 21)); + patch_value(s, cmd_ptr(s, 0), val); + } } /* Check notify bit */ if ((cmd_val(s, 0) & (1 << 8))) -- 2.30.2