The patch titled
sgi-gru: add support for a user to explicitly unload a GRU context
has been added to the -mm tree. Its filename is
sgi-gru-add-support-for-a-user-to-explicitly-unload-a-gru-context.patch
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The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: sgi-gru: add support for a user to explicitly unload a GRU context
From: Jack Steiner <steiner@xxxxxxx>
Add support for a user to explicitly unload a GRU context.
Signed-off-by: Jack Steiner <steiner@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/misc/sgi-gru/grufault.c | 36 ++++++++++++++++++++++++++++++
1 file changed, 36 insertions(+)
diff -puN drivers/misc/sgi-gru/grufault.c~sgi-gru-add-support-for-a-user-to-explicitly-unload-a-gru-context drivers/misc/sgi-gru/grufault.c
--- a/drivers/misc/sgi-gru/grufault.c~sgi-gru-add-support-for-a-user-to-explicitly-unload-a-gru-context
+++ a/drivers/misc/sgi-gru/grufault.c
@@ -32,6 +32,7 @@
#include <linux/device.h>
#include <linux/io.h>
#include <linux/uaccess.h>
+#include <linux/security.h>
#include <asm/pgtable.h>
#include "gru.h"
#include "grutables.h"
@@ -575,6 +576,38 @@ int gru_get_exception_detail(unsigned lo
/*
* User request to unload a context. Content is saved for possible reload.
*/
+static int gru_unload_all_contexts(void)
+{
+ struct gru_thread_state *gts;
+ struct gru_state *gru;
+ int maxgid, gid, ctxnum;
+ int nodesperblade;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+ if (num_online_nodes() > 1 &&
+ (uv_node_to_blade_id(1) == uv_node_to_blade_id(0)))
+ nodesperblade = 2;
+ else
+ nodesperblade = 1;
+ maxgid = GRU_CHIPLETS_PER_BLADE * num_online_nodes() / nodesperblade;
+ for (gid = 0; gid < maxgid; gid++) {
+ gru = GID_TO_GRU(gid);
+ spin_lock(&gru->gs_lock);
+ for (ctxnum = 0; ctxnum < GRU_NUM_CCH; ctxnum++) {
+ gts = gru->gs_gts[ctxnum];
+ if (gts && mutex_trylock(>s->ts_ctxlock)) {
+ spin_unlock(&gru->gs_lock);
+ gru_unload_context(gts, 1);
+ gru_unlock_gts(gts);
+ spin_lock(&gru->gs_lock);
+ }
+ }
+ spin_unlock(&gru->gs_lock);
+ }
+ return 0;
+}
+
int gru_user_unload_context(unsigned long arg)
{
struct gru_thread_state *gts;
@@ -586,6 +619,9 @@ int gru_user_unload_context(unsigned lon
gru_dbg(grudev, "gseg 0x%lx\n", req.gseg);
+ if (!req.gseg)
+ return gru_unload_all_contexts();
+
gts = gru_find_lock_gts(req.gseg);
if (!gts)
return -EINVAL;
_
Patches currently in -mm which might be from steiner@xxxxxxx are
sgi-gru-add-definitions-of-x86_64-gru-mmrs.patch
sgi-gru-add-definitions-of-ia64-gru-mmrs.patch
sgi-gru-add-macros-for-using-the-uv-hub-to-send-interrupts.patch
sgi-gru-misc-gru-cleanup.patch
sgi-gru-improvements-to-gru-debug-messages-statistics.patch
sgi-gru-change-gru-cch-commands-from-inline-functions-to-outofline-functions.patch
sgi-gru-add-statistics-to-the-gru-context-management-functions.patch
sgi-gru-add-support-for-a-user-to-explicitly-unload-a-gru-context.patch
sgi-gru-asid-context-management-bug-fixes.patch
sgi-gru-restructure-the-gru-vtop-functions.patch
sgi-gru-add-support-to-the-gru-driver-for-message-queue-interrupts.patch
sgi-gru-macro-for-scanning-all-gru-chiplets.patch
sgi-gru-fix-bugs-related-to-module-unload-of-the-gru-driver.patch
sgi-gru-support-multiple-pagesizes-in-gru.patch
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