From: "Ian Munsie" <imunsie@au1.ibm.com>
To: mpe <mpe@ellerman.id.au>
Cc: cbe-oss-dev <cbe-oss-dev@lists.ozlabs.org>,
mikey <mikey@neuling.org>, arnd <arnd@arndb.de>,
"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>,
greg <greg@kroah.com>,
linux-kernel <linux-kernel@vger.kernel.org>,
linuxppc-dev <linuxppc-dev@ozlabs.org>, anton <anton@samba.org>,
imunsie <imunsie@au1.ibm.com>, jk <jk@ozlabs.org>
Subject: [PATCH 6/7] CXL: Disable SPAP register when freeing SPA
Date: Mon, 8 Dec 2014 19:18:00 +1100 [thread overview]
Message-ID: <1418026681-14787-6-git-send-email-imunsie@au.ibm.com> (raw)
In-Reply-To: <1418026681-14787-1-git-send-email-imunsie@au.ibm.com>
From: Ian Munsie <imunsie@au1.ibm.com>
When we deactivate the AFU directed mode we free the scheduled process
area, but did not clear the register in the hardware that has a pointer
to it.
This should be fine since we will have already cleared out every context
and we won't do anything that would cause the hardware to access it
until after we have allocated a new one, but just to be safe this patch
clears out the register when we free the page.
Signed-off-by: Ian Munsie <imunsie@au1.ibm.com>
---
drivers/misc/cxl/native.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/misc/cxl/native.c b/drivers/misc/cxl/native.c
index f2b37b4..0f24fa5 100644
--- a/drivers/misc/cxl/native.c
+++ b/drivers/misc/cxl/native.c
@@ -185,6 +185,7 @@ static int alloc_spa(struct cxl_afu *afu)
static void release_spa(struct cxl_afu *afu)
{
+ cxl_p1n_write(afu, CXL_PSL_SPAP_An, 0);
free_pages((unsigned long) afu->spa, afu->spa_order);
}
--
2.1.3
next prev parent reply other threads:[~2014-12-08 8:18 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-08 8:17 [PATCH 1/7] CXL: Change contexts_lock to a mutex to fix sleep while atomic bug Ian Munsie
2014-12-08 8:17 ` [PATCH 2/7] CXL: Add timeout to process element commands Ian Munsie
2014-12-09 5:31 ` Ian Munsie
2014-12-08 8:17 ` [PATCH 3/7] CXL: Fix leaking interrupts if attach process fails Ian Munsie
2014-12-09 5:34 ` Ian Munsie
2014-12-08 8:17 ` [PATCH 4/7] CXL: Early return from cxl_handle_fault for a shut down context Ian Munsie
2014-12-08 8:17 ` [PATCH 5/7] CXL: Disable AFU debug flag Ian Munsie
2014-12-09 5:39 ` Ian Munsie
2014-12-08 8:18 ` Ian Munsie [this message]
2014-12-08 8:18 ` [PATCH 7/7] CXL: Unmap MMIO regions when detaching a context Ian Munsie
2014-12-09 5:41 ` Ian Munsie
2014-12-15 3:32 ` Ian Munsie
2014-12-15 23:32 ` Michael Ellerman
2014-12-09 5:30 ` [PATCH 1/7] CXL: Change contexts_lock to a mutex to fix sleep while atomic bug Ian Munsie
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