9b469093d3
A driver bug was recently discovered where the security firmware was
receiving internal HW signals indicating that session key expirations
had occurred. Architecturally, the firmware was expecting a response
from the GuC to acknowledge the event with the firmware side.
However the OS was in a suspended state and GuC had been reset.
Internal specifications actually required the driver to ensure
that all active sessions be properly cleaned up in such cases where
the system is suspended and the GuC potentially unable to respond.
This patch adds the global teardown code in i915's suspend_prepare
code path.
v2 : Split __pxp_global_teardown_locked helper into two variants
for teardown-with-restart vs teardown-for-suspend/shutdown.
Signed-off-by: Alan Previn <alan.previn.teres.alexis@intel.com>
Reviewed-by: Juston Li <justonli@chromium.org>
Acked-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230125082637.118970-6-alan.previn.teres.alexis@intel.com
26 lines
627 B
C
26 lines
627 B
C
/* SPDX-License-Identifier: MIT */
|
|
/*
|
|
* Copyright(c) 2020, Intel Corporation. All rights reserved.
|
|
*/
|
|
|
|
#ifndef __INTEL_PXP_SESSION_H__
|
|
#define __INTEL_PXP_SESSION_H__
|
|
|
|
#include <linux/types.h>
|
|
|
|
struct intel_pxp;
|
|
|
|
#ifdef CONFIG_DRM_I915_PXP
|
|
void intel_pxp_session_management_init(struct intel_pxp *pxp);
|
|
void intel_pxp_terminate(struct intel_pxp *pxp, bool post_invalidation_needs_restart);
|
|
#else
|
|
static inline void intel_pxp_session_management_init(struct intel_pxp *pxp)
|
|
{
|
|
}
|
|
|
|
static inline void intel_pxp_terminate(struct intel_pxp *pxp, bool post_invalidation_needs_restart)
|
|
{
|
|
}
|
|
#endif
|
|
#endif /* __INTEL_PXP_SESSION_H__ */
|