linux-kernel - [PATCH] habanalabs/gaudi: move mmu

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Date:   Mon,  2 Nov 2020 21:46:16 +0200
From:   Oded Gabbay <ogabbay@...nel.org>
To:     linux-kernel@...r.kernel.org
Cc:     SW_Drivers@...ana.ai, Ofir Bitton <obitton@...ana.ai>
Subject: [PATCH] habanalabs/gaudi: move mmu_prepare to context init

From: Ofir Bitton <obitton@...ana.ai>

Currently mmu_prepare is located at context switch.
Since we support a single context, no reason to reconfigure
the MMU registers every context switch.

Signed-off-by: Ofir Bitton <obitton@...ana.ai>
Reviewed-by: Oded Gabbay <ogabbay@...nel.org>
Signed-off-by: Oded Gabbay <ogabbay@...nel.org>
---
 drivers/misc/habanalabs/gaudi/gaudi.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/misc/habanalabs/gaudi/gaudi.c b/drivers/misc/habanalabs/gaudi/gaudi.c
index 5f65a1691551..2910f427c716 100644
--- a/drivers/misc/habanalabs/gaudi/gaudi.c
+++ b/drivers/misc/habanalabs/gaudi/gaudi.c
@@ -4505,8 +4505,6 @@ static int gaudi_context_switch(struct hl_device *hdev, u32 asid)
 		return rc;
 	}
 
-	gaudi_mmu_prepare(hdev, asid);
-
 	gaudi_restore_user_registers(hdev);
 
 	return 0;
@@ -6359,6 +6357,8 @@ static enum hl_device_hw_state gaudi_get_hw_state(struct hl_device *hdev)
 
 static int gaudi_ctx_init(struct hl_ctx *ctx)
 {
+	gaudi_mmu_prepare(ctx->hdev, ctx->asid);
+
 	return 0;
 }
 
-- 
2.17.1