From: Nadav Amit <namit@vmware.com>
To: Arnd Bergmann <arnd@arndb.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: <linux-kernel@vger.kernel.org>,
Xavier Deguillard <xdeguillard@vmware.com>,
Nadav Amit <namit@vmware.com>
Subject: [PATCH 17/19] vmw_balloon: support 64-bit memory limit
Date: Mon, 17 Sep 2018 23:38:51 -0700 [thread overview]
Message-ID: <20180918063853.198332-18-namit@vmware.com> (raw)
In-Reply-To: <20180918063853.198332-1-namit@vmware.com>
From: Xavier Deguillard <xdeguillard@vmware.com>
Currently, the balloon driver would fail to run if memory is greater
than 16TB of vRAM. Previous patches have already converted the balloon
target and size to 64-bit, so all that is left to do add is to avoid
asserting memory is smaller than 16TB if the hypervisor supports 64-bits
target.
The driver advertises a new capability VMW_BALLOON_64_BITS_TARGET.
Hypervisors that support 16TB of memory or more will report that this
capability is enabled.
Signed-off-by: Xavier Deguillard <xdeguillard@vmware.com>
Signed-off-by: Nadav Amit <namit@vmware.com>
---
drivers/misc/vmw_balloon.c | 18 +++++++++++++++---
1 file changed, 15 insertions(+), 3 deletions(-)
diff --git a/drivers/misc/vmw_balloon.c b/drivers/misc/vmw_balloon.c
index 27cac1f98e1e..372282de649e 100644
--- a/drivers/misc/vmw_balloon.c
+++ b/drivers/misc/vmw_balloon.c
@@ -59,13 +59,24 @@ enum vmwballoon_capabilities {
VMW_BALLOON_BATCHED_CMDS = (1 << 2),
VMW_BALLOON_BATCHED_2M_CMDS = (1 << 3),
VMW_BALLOON_SIGNALLED_WAKEUP_CMD = (1 << 4),
+ VMW_BALLOON_64_BIT_TARGET = (1 << 5)
};
-#define VMW_BALLOON_CAPABILITIES (VMW_BALLOON_BASIC_CMDS \
+#define VMW_BALLOON_CAPABILITIES_COMMON (VMW_BALLOON_BASIC_CMDS \
| VMW_BALLOON_BATCHED_CMDS \
| VMW_BALLOON_BATCHED_2M_CMDS \
| VMW_BALLOON_SIGNALLED_WAKEUP_CMD)
+/*
+ * 64-bit targets are only supported in 64-bit
+ */
+#ifdef CONFIG_64BIT
+#define VMW_BALLOON_CAPABILITIES (VMW_BALLOON_CAPABILITIES_COMMON \
+ | VMW_BALLOON_64_BIT_TARGET)
+#else
+#define VMW_BALLOON_CAPABILITIES VMW_BALLOON_CAPABILITIES_COMMON
+#endif
+
enum vmballoon_page_size_type {
VMW_BALLOON_4K_PAGE,
VMW_BALLOON_2M_PAGE,
@@ -549,8 +560,9 @@ static int vmballoon_send_get_target(struct vmballoon *b)
limit = totalram_pages;
- /* Ensure limit fits in 32-bits */
- if (limit != (u32)limit)
+ /* Ensure limit fits in 32-bits if 64-bit targets are not supported */
+ if (!(b->capabilities & VMW_BALLOON_64_BIT_TARGET) &&
+ limit != (u32)limit)
return -EINVAL;
status = vmballoon_cmd(b, VMW_BALLOON_CMD_GET_TARGET, limit, 0);
--
2.17.1
next prev parent reply other threads:[~2018-09-18 6:40 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-18 6:38 [PATCH 00/19] vmw_balloon: compaction, shrinker, 64-bit, etc Nadav Amit
2018-09-18 6:38 ` [PATCH 01/19] vmw_balloon: handle commands in a single function Nadav Amit
2018-09-18 6:38 ` [PATCH 02/19] vmw_balloon: unify commands tracing and stats Nadav Amit
2018-09-18 6:38 ` [PATCH 03/19] vmw_balloon: merge send_lock and send_unlock path Nadav Amit
2018-09-18 6:38 ` [PATCH 04/19] vmw_balloon: simplifying batch access Nadav Amit
2018-09-18 6:38 ` [PATCH 05/19] vmw_balloon: remove sleeping allocations Nadav Amit
2018-09-18 10:01 ` kbuild test robot
2018-09-18 6:38 ` [PATCH 06/19] vmw_balloon: change batch/single lock abstractions Nadav Amit
2018-09-18 6:38 ` [PATCH 07/19] vmw_balloon: treat all refused pages equally Nadav Amit
2018-09-18 6:38 ` [PATCH 08/19] vmw_balloon: refactor change size from vmballoon_work Nadav Amit
2018-09-18 8:09 ` kbuild test robot
2018-09-18 12:19 ` kbuild test robot
2018-09-18 6:38 ` [PATCH 09/19] vmw_balloon: simplify vmballoon_send_get_target() Nadav Amit
2018-09-18 6:38 ` [PATCH 10/19] vmw_balloon: stats rework Nadav Amit
2018-09-18 6:38 ` [PATCH 11/19] vmw_balloon: rework the inflate and deflate loops Nadav Amit
2018-09-18 9:55 ` kbuild test robot
2018-09-18 15:46 ` kbuild test robot
2018-09-18 6:38 ` [PATCH 12/19] vmw_balloon: general style cleanup Nadav Amit
2018-09-18 6:38 ` [PATCH 13/19] vmw_balloon: add reset stat Nadav Amit
2018-09-18 6:38 ` [PATCH 14/19] mm/balloon_compaction: suppress allocation warnings Nadav Amit
2018-09-18 6:38 ` [PATCH 15/19] mm/balloon_compaction: list interfaces Nadav Amit
2018-09-18 6:38 ` [PATCH 16/19] vmw_balloon: compaction support Nadav Amit
2018-09-18 6:38 ` Nadav Amit [this message]
2018-09-18 6:38 ` [PATCH 18/19] vmw_balloon: memory shrinker Nadav Amit
2018-09-18 6:38 ` [PATCH 19/19] vmw_balloon: split refused pages Nadav Amit
2018-09-18 12:27 ` [PATCH 00/19] vmw_balloon: compaction, shrinker, 64-bit, etc Greg Kroah-Hartman
2018-09-18 16:42 ` Nadav Amit
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