--- /dev/null
+From 732b33d0dbf17e9483f0b50385bf606f724f50a2 Mon Sep 17 00:00:00 2001
+From: Harshvardhan Jha <harshvardhan.jha@oracle.com>
+Date: Tue, 27 Jul 2021 05:37:10 +0530
+Subject: 9p/xen: Fix end of loop tests for list_for_each_entry
+
+From: Harshvardhan Jha <harshvardhan.jha@oracle.com>
+
+commit 732b33d0dbf17e9483f0b50385bf606f724f50a2 upstream.
+
+This patch addresses the following problems:
+ - priv can never be NULL, so this part of the check is useless
+ - if the loop ran through the whole list, priv->client is invalid and
+it is more appropriate and sufficient to check for the end of
+list_for_each_entry loop condition.
+
+Link: http://lkml.kernel.org/r/20210727000709.225032-1-harshvardhan.jha@oracle.com
+Signed-off-by: Harshvardhan Jha <harshvardhan.jha@oracle.com>
+Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
+Tested-by: Stefano Stabellini <sstabellini@kernel.org>
+Cc: <stable@vger.kernel.org>
+Signed-off-by: Dominique Martinet <asmadeus@codewreck.org>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ net/9p/trans_xen.c | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+--- a/net/9p/trans_xen.c
++++ b/net/9p/trans_xen.c
+@@ -138,7 +138,7 @@ static bool p9_xen_write_todo(struct xen
+
+ static int p9_xen_request(struct p9_client *client, struct p9_req_t *p9_req)
+ {
+- struct xen_9pfs_front_priv *priv = NULL;
++ struct xen_9pfs_front_priv *priv;
+ RING_IDX cons, prod, masked_cons, masked_prod;
+ unsigned long flags;
+ u32 size = p9_req->tc.size;
+@@ -151,7 +151,7 @@ static int p9_xen_request(struct p9_clie
+ break;
+ }
+ read_unlock(&xen_9pfs_lock);
+- if (!priv || priv->client != client)
++ if (list_entry_is_head(priv, &xen_9pfs_devs, list))
+ return -EINVAL;
+
+ num = p9_req->tc.tag % priv->num_rings;
--- /dev/null
+From 4d643b66089591b4769bcdb6fd1bfeff2fe301b8 Mon Sep 17 00:00:00 2001
+From: Niklas Cassel <niklas.cassel@wdc.com>
+Date: Wed, 11 Aug 2021 11:05:19 +0000
+Subject: blk-zoned: allow BLKREPORTZONE without CAP_SYS_ADMIN
+
+From: Niklas Cassel <niklas.cassel@wdc.com>
+
+commit 4d643b66089591b4769bcdb6fd1bfeff2fe301b8 upstream.
+
+A user space process should not need the CAP_SYS_ADMIN capability set
+in order to perform a BLKREPORTZONE ioctl.
+
+Getting the zone report is required in order to get the write pointer.
+Neither read() nor write() requires CAP_SYS_ADMIN, so it is reasonable
+that a user space process that can read/write from/to the device, also
+can get the write pointer. (Since e.g. writes have to be at the write
+pointer.)
+
+Fixes: 3ed05a987e0f ("blk-zoned: implement ioctls")
+Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
+Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
+Reviewed-by: Aravind Ramesh <aravind.ramesh@wdc.com>
+Reviewed-by: Adam Manzanares <a.manzanares@samsung.com>
+Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
+Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
+Cc: stable@vger.kernel.org # v4.10+
+Link: https://lore.kernel.org/r/20210811110505.29649-3-Niklas.Cassel@wdc.com
+Signed-off-by: Jens Axboe <axboe@kernel.dk>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ block/blk-zoned.c | 3 ---
+ 1 file changed, 3 deletions(-)
+
+--- a/block/blk-zoned.c
++++ b/block/blk-zoned.c
+@@ -319,9 +319,6 @@ int blkdev_report_zones_ioctl(struct blo
+ if (!blk_queue_is_zoned(q))
+ return -ENOTTY;
+
+- if (!capable(CAP_SYS_ADMIN))
+- return -EACCES;
+-
+ if (copy_from_user(&rep, argp, sizeof(struct blk_zone_report)))
+ return -EFAULT;
+
--- /dev/null
+From ead3b768bb51259e3a5f2287ff5fc9041eb6f450 Mon Sep 17 00:00:00 2001
+From: Niklas Cassel <niklas.cassel@wdc.com>
+Date: Wed, 11 Aug 2021 11:05:18 +0000
+Subject: blk-zoned: allow zone management send operations without CAP_SYS_ADMIN
+
+From: Niklas Cassel <niklas.cassel@wdc.com>
+
+commit ead3b768bb51259e3a5f2287ff5fc9041eb6f450 upstream.
+
+Zone management send operations (BLKRESETZONE, BLKOPENZONE, BLKCLOSEZONE
+and BLKFINISHZONE) should be allowed under the same permissions as write().
+(write() does not require CAP_SYS_ADMIN).
+
+Additionally, other ioctls like BLKSECDISCARD and BLKZEROOUT only check if
+the fd was successfully opened with FMODE_WRITE.
+(They do not require CAP_SYS_ADMIN).
+
+Currently, zone management send operations require both CAP_SYS_ADMIN
+and that the fd was successfully opened with FMODE_WRITE.
+
+Remove the CAP_SYS_ADMIN requirement, so that zone management send
+operations match the access control requirement of write(), BLKSECDISCARD
+and BLKZEROOUT.
+
+Fixes: 3ed05a987e0f ("blk-zoned: implement ioctls")
+Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
+Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
+Reviewed-by: Aravind Ramesh <aravind.ramesh@wdc.com>
+Reviewed-by: Adam Manzanares <a.manzanares@samsung.com>
+Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
+Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
+Cc: stable@vger.kernel.org # v4.10+
+Link: https://lore.kernel.org/r/20210811110505.29649-2-Niklas.Cassel@wdc.com
+Signed-off-by: Jens Axboe <axboe@kernel.dk>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ block/blk-zoned.c | 3 ---
+ 1 file changed, 3 deletions(-)
+
+--- a/block/blk-zoned.c
++++ b/block/blk-zoned.c
+@@ -380,9 +380,6 @@ int blkdev_reset_zones_ioctl(struct bloc
+ if (!blk_queue_is_zoned(q))
+ return -ENOTTY;
+
+- if (!capable(CAP_SYS_ADMIN))
+- return -EACCES;
+-
+ if (!(mode & FMODE_WRITE))
+ return -EBADF;
+
--- /dev/null
+From 0d977e0eba234e01a60bdde27314dc21374201b3 Mon Sep 17 00:00:00 2001
+From: Desmond Cheong Zhi Xi <desmondcheongzx@gmail.com>
+Date: Sat, 21 Aug 2021 01:50:40 +0800
+Subject: btrfs: reset replace target device to allocation state on close
+
+From: Desmond Cheong Zhi Xi <desmondcheongzx@gmail.com>
+
+commit 0d977e0eba234e01a60bdde27314dc21374201b3 upstream.
+
+This crash was observed with a failed assertion on device close:
+
+ BTRFS: Transaction aborted (error -28)
+ WARNING: CPU: 1 PID: 3902 at fs/btrfs/extent-tree.c:2150 btrfs_run_delayed_refs+0x1d2/0x1e0 [btrfs]
+ Modules linked in: btrfs blake2b_generic libcrc32c crc32c_intel xor zstd_decompress zstd_compress xxhash lzo_compress lzo_decompress raid6_pq loop
+ CPU: 1 PID: 3902 Comm: kworker/u8:4 Not tainted 5.14.0-rc5-default+ #1532
+ Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.0-59-gc9ba527-rebuilt.opensuse.org 04/01/2014
+ Workqueue: events_unbound btrfs_async_reclaim_metadata_space [btrfs]
+ RIP: 0010:btrfs_run_delayed_refs+0x1d2/0x1e0 [btrfs]
+ RSP: 0018:ffffb7a5452d7d80 EFLAGS: 00010282
+ RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000
+ RDX: 0000000000000001 RSI: ffffffffabee13c4 RDI: 00000000ffffffff
+ RBP: ffff97834176a378 R08: 0000000000000001 R09: 0000000000000001
+ R10: 0000000000000000 R11: 0000000000000001 R12: ffff97835195d388
+ R13: 0000000005b08000 R14: ffff978385484000 R15: 000000000000016c
+ FS: 0000000000000000(0000) GS:ffff9783bd800000(0000) knlGS:0000000000000000
+ CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
+ CR2: 000056190d003fe8 CR3: 000000002a81e005 CR4: 0000000000170ea0
+ Call Trace:
+ flush_space+0x197/0x2f0 [btrfs]
+ btrfs_async_reclaim_metadata_space+0x139/0x300 [btrfs]
+ process_one_work+0x262/0x5e0
+ worker_thread+0x4c/0x320
+ ? process_one_work+0x5e0/0x5e0
+ kthread+0x144/0x170
+ ? set_kthread_struct+0x40/0x40
+ ret_from_fork+0x1f/0x30
+ irq event stamp: 19334989
+ hardirqs last enabled at (19334997): [<ffffffffab0e0c87>] console_unlock+0x2b7/0x400
+ hardirqs last disabled at (19335006): [<ffffffffab0e0d0d>] console_unlock+0x33d/0x400
+ softirqs last enabled at (19334900): [<ffffffffaba0030d>] __do_softirq+0x30d/0x574
+ softirqs last disabled at (19334893): [<ffffffffab0721ec>] irq_exit_rcu+0x12c/0x140
+ ---[ end trace 45939e308e0dd3c7 ]---
+ BTRFS: error (device vdd) in btrfs_run_delayed_refs:2150: errno=-28 No space left
+ BTRFS info (device vdd): forced readonly
+ BTRFS warning (device vdd): failed setting block group ro: -30
+ BTRFS info (device vdd): suspending dev_replace for unmount
+ assertion failed: !test_bit(BTRFS_DEV_STATE_REPLACE_TGT, &device->dev_state), in fs/btrfs/volumes.c:1150
+ ------------[ cut here ]------------
+ kernel BUG at fs/btrfs/ctree.h:3431!
+ invalid opcode: 0000 [#1] PREEMPT SMP
+ CPU: 1 PID: 3982 Comm: umount Tainted: G W 5.14.0-rc5-default+ #1532
+ Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.0-59-gc9ba527-rebuilt.opensuse.org 04/01/2014
+ RIP: 0010:assertfail.constprop.0+0x18/0x1a [btrfs]
+ RSP: 0018:ffffb7a5454c7db8 EFLAGS: 00010246
+ RAX: 0000000000000068 RBX: ffff978364b91c00 RCX: 0000000000000000
+ RDX: 0000000000000000 RSI: ffffffffabee13c4 RDI: 00000000ffffffff
+ RBP: ffff9783523a4c00 R08: 0000000000000001 R09: 0000000000000001
+ R10: 0000000000000000 R11: 0000000000000001 R12: ffff9783523a4d18
+ R13: 0000000000000000 R14: 0000000000000004 R15: 0000000000000003
+ FS: 00007f61c8f42800(0000) GS:ffff9783bd800000(0000) knlGS:0000000000000000
+ CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
+ CR2: 000056190cffa810 CR3: 0000000030b96002 CR4: 0000000000170ea0
+ Call Trace:
+ btrfs_close_one_device.cold+0x11/0x55 [btrfs]
+ close_fs_devices+0x44/0xb0 [btrfs]
+ btrfs_close_devices+0x48/0x160 [btrfs]
+ generic_shutdown_super+0x69/0x100
+ kill_anon_super+0x14/0x30
+ btrfs_kill_super+0x12/0x20 [btrfs]
+ deactivate_locked_super+0x2c/0xa0
+ cleanup_mnt+0x144/0x1b0
+ task_work_run+0x59/0xa0
+ exit_to_user_mode_loop+0xe7/0xf0
+ exit_to_user_mode_prepare+0xaf/0xf0
+ syscall_exit_to_user_mode+0x19/0x50
+ do_syscall_64+0x4a/0x90
+ entry_SYSCALL_64_after_hwframe+0x44/0xae
+
+This happens when close_ctree is called while a dev_replace hasn't
+completed. In close_ctree, we suspend the dev_replace, but keep the
+replace target around so that we can resume the dev_replace procedure
+when we mount the root again. This is the call trace:
+
+ close_ctree():
+ btrfs_dev_replace_suspend_for_unmount();
+ btrfs_close_devices():
+ btrfs_close_fs_devices():
+ btrfs_close_one_device():
+ ASSERT(!test_bit(BTRFS_DEV_STATE_REPLACE_TGT,
+ &device->dev_state));
+
+However, since the replace target sticks around, there is a device
+with BTRFS_DEV_STATE_REPLACE_TGT set on close, and we fail the
+assertion in btrfs_close_one_device.
+
+To fix this, if we come across the replace target device when
+closing, we should properly reset it back to allocation state. This
+fix also ensures that if a non-target device has a corrupted state and
+has the BTRFS_DEV_STATE_REPLACE_TGT bit set, the assertion will still
+catch the error.
+
+Reported-by: David Sterba <dsterba@suse.com>
+Fixes: b2a616676839 ("btrfs: fix rw device counting in __btrfs_free_extra_devids")
+CC: stable@vger.kernel.org # 4.19+
+Reviewed-by: Anand Jain <anand.jain@oracle.com>
+Signed-off-by: Desmond Cheong Zhi Xi <desmondcheongzx@gmail.com>
+Reviewed-by: David Sterba <dsterba@suse.com>
+Signed-off-by: David Sterba <dsterba@suse.com>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ fs/btrfs/volumes.c | 3 +++
+ 1 file changed, 3 insertions(+)
+
+--- a/fs/btrfs/volumes.c
++++ b/fs/btrfs/volumes.c
+@@ -1048,6 +1048,9 @@ static void btrfs_close_one_device(struc
+ fs_devices->rw_devices--;
+ }
+
++ if (device->devid == BTRFS_DEV_REPLACE_DEVID)
++ clear_bit(BTRFS_DEV_STATE_REPLACE_TGT, &device->dev_state);
++
+ if (test_bit(BTRFS_DEV_STATE_MISSING, &device->dev_state))
+ fs_devices->missing_devices--;
+
--- /dev/null
+From e130816164e244b692921de49771eeb28205152d Mon Sep 17 00:00:00 2001
+From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
+Date: Thu, 15 Oct 2020 20:11:31 -0700
+Subject: include/linux/list.h: add a macro to test if entry is pointing to the head
+
+From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
+
+commit e130816164e244b692921de49771eeb28205152d upstream.
+
+Add a macro to test if entry is pointing to the head of the list which is
+useful in cases like:
+
+ list_for_each_entry(pos, &head, member) {
+ if (cond)
+ break;
+ }
+ if (list_entry_is_head(pos, &head, member))
+ return -ERRNO;
+
+that allows to avoid additional variable to be added to track if loop has
+not been stopped in the middle.
+
+While here, convert list_for_each_entry*() family of macros to use a new one.
+
+Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
+Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
+Reviewed-by: Cezary Rojewski <cezary.rojewski@intel.com>
+Link: https://lkml.kernel.org/r/20200929134342.51489-1-andriy.shevchenko@linux.intel.com
+Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ include/linux/list.h | 29 +++++++++++++++++++----------
+ 1 file changed, 19 insertions(+), 10 deletions(-)
+
+--- a/include/linux/list.h
++++ b/include/linux/list.h
+@@ -485,6 +485,15 @@ static inline void list_splice_tail_init
+ pos = n, n = pos->prev)
+
+ /**
++ * list_entry_is_head - test if the entry points to the head of the list
++ * @pos: the type * to cursor
++ * @head: the head for your list.
++ * @member: the name of the list_head within the struct.
++ */
++#define list_entry_is_head(pos, head, member) \
++ (&pos->member == (head))
++
++/**
+ * list_for_each_entry - iterate over list of given type
+ * @pos: the type * to use as a loop cursor.
+ * @head: the head for your list.
+@@ -492,7 +501,7 @@ static inline void list_splice_tail_init
+ */
+ #define list_for_each_entry(pos, head, member) \
+ for (pos = list_first_entry(head, typeof(*pos), member); \
+- &pos->member != (head); \
++ !list_entry_is_head(pos, head, member); \
+ pos = list_next_entry(pos, member))
+
+ /**
+@@ -503,7 +512,7 @@ static inline void list_splice_tail_init
+ */
+ #define list_for_each_entry_reverse(pos, head, member) \
+ for (pos = list_last_entry(head, typeof(*pos), member); \
+- &pos->member != (head); \
++ !list_entry_is_head(pos, head, member); \
+ pos = list_prev_entry(pos, member))
+
+ /**
+@@ -528,7 +537,7 @@ static inline void list_splice_tail_init
+ */
+ #define list_for_each_entry_continue(pos, head, member) \
+ for (pos = list_next_entry(pos, member); \
+- &pos->member != (head); \
++ !list_entry_is_head(pos, head, member); \
+ pos = list_next_entry(pos, member))
+
+ /**
+@@ -542,7 +551,7 @@ static inline void list_splice_tail_init
+ */
+ #define list_for_each_entry_continue_reverse(pos, head, member) \
+ for (pos = list_prev_entry(pos, member); \
+- &pos->member != (head); \
++ !list_entry_is_head(pos, head, member); \
+ pos = list_prev_entry(pos, member))
+
+ /**
+@@ -554,7 +563,7 @@ static inline void list_splice_tail_init
+ * Iterate over list of given type, continuing from current position.
+ */
+ #define list_for_each_entry_from(pos, head, member) \
+- for (; &pos->member != (head); \
++ for (; !list_entry_is_head(pos, head, member); \
+ pos = list_next_entry(pos, member))
+
+ /**
+@@ -567,7 +576,7 @@ static inline void list_splice_tail_init
+ * Iterate backwards over list of given type, continuing from current position.
+ */
+ #define list_for_each_entry_from_reverse(pos, head, member) \
+- for (; &pos->member != (head); \
++ for (; !list_entry_is_head(pos, head, member); \
+ pos = list_prev_entry(pos, member))
+
+ /**
+@@ -580,7 +589,7 @@ static inline void list_splice_tail_init
+ #define list_for_each_entry_safe(pos, n, head, member) \
+ for (pos = list_first_entry(head, typeof(*pos), member), \
+ n = list_next_entry(pos, member); \
+- &pos->member != (head); \
++ !list_entry_is_head(pos, head, member); \
+ pos = n, n = list_next_entry(n, member))
+
+ /**
+@@ -596,7 +605,7 @@ static inline void list_splice_tail_init
+ #define list_for_each_entry_safe_continue(pos, n, head, member) \
+ for (pos = list_next_entry(pos, member), \
+ n = list_next_entry(pos, member); \
+- &pos->member != (head); \
++ !list_entry_is_head(pos, head, member); \
+ pos = n, n = list_next_entry(n, member))
+
+ /**
+@@ -611,7 +620,7 @@ static inline void list_splice_tail_init
+ */
+ #define list_for_each_entry_safe_from(pos, n, head, member) \
+ for (n = list_next_entry(pos, member); \
+- &pos->member != (head); \
++ !list_entry_is_head(pos, head, member); \
+ pos = n, n = list_next_entry(n, member))
+
+ /**
+@@ -627,7 +636,7 @@ static inline void list_splice_tail_init
+ #define list_for_each_entry_safe_reverse(pos, n, head, member) \
+ for (pos = list_last_entry(head, typeof(*pos), member), \
+ n = list_prev_entry(pos, member); \
+- &pos->member != (head); \
++ !list_entry_is_head(pos, head, member); \
+ pos = n, n = list_prev_entry(n, member))
+
+ /**
--- /dev/null
+From 1a519dc7a73c977547d8b5108d98c6e769c89f4b Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Marek=20Marczykowski-G=C3=B3recki?=
+ <marmarek@invisiblethingslab.com>
+Date: Thu, 26 Aug 2021 19:03:42 +0200
+Subject: PCI/MSI: Skip masking MSI-X on Xen PV
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+From: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
+
+commit 1a519dc7a73c977547d8b5108d98c6e769c89f4b upstream.
+
+When running as Xen PV guest, masking MSI-X is a responsibility of the
+hypervisor. The guest has no write access to the relevant BAR at all - when
+it tries to, it results in a crash like this:
+
+ BUG: unable to handle page fault for address: ffffc9004069100c
+ #PF: supervisor write access in kernel mode
+ #PF: error_code(0x0003) - permissions violation
+ RIP: e030:__pci_enable_msix_range.part.0+0x26b/0x5f0
+ e1000e_set_interrupt_capability+0xbf/0xd0 [e1000e]
+ e1000_probe+0x41f/0xdb0 [e1000e]
+ local_pci_probe+0x42/0x80
+ (...)
+
+The recently introduced function msix_mask_all() does not check the global
+variable pci_msi_ignore_mask which is set by XEN PV to bypass the masking
+of MSI[-X] interrupts.
+
+Add the check to make this function XEN PV compatible.
+
+Fixes: 7d5ec3d36123 ("PCI/MSI: Mask all unused MSI-X entries")
+Signed-off-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
+Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
+Acked-by: Bjorn Helgaas <bhelgaas@google.com>
+Cc: stable@vger.kernel.org
+Link: https://lore.kernel.org/r/20210826170342.135172-1-marmarek@invisiblethingslab.com
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ drivers/pci/msi.c | 3 +++
+ 1 file changed, 3 insertions(+)
+
+--- a/drivers/pci/msi.c
++++ b/drivers/pci/msi.c
+@@ -754,6 +754,9 @@ static void msix_mask_all(void __iomem *
+ u32 ctrl = PCI_MSIX_ENTRY_CTRL_MASKBIT;
+ int i;
+
++ if (pci_msi_ignore_mask)
++ return;
++
+ for (i = 0; i < tsize; i++, base += PCI_MSIX_ENTRY_SIZE)
+ writel(ctrl, base + PCI_MSIX_ENTRY_VECTOR_CTRL);
+ }
--- /dev/null
+From f9addd85fbfacf0d155e83dbee8696d6df5ed0c7 Mon Sep 17 00:00:00 2001
+From: Kajol Jain <kjain@linux.ibm.com>
+Date: Fri, 13 Aug 2021 13:51:58 +0530
+Subject: powerpc/perf/hv-gpci: Fix counter value parsing
+
+From: Kajol Jain <kjain@linux.ibm.com>
+
+commit f9addd85fbfacf0d155e83dbee8696d6df5ed0c7 upstream.
+
+H_GetPerformanceCounterInfo (0xF080) hcall returns the counter data in
+the result buffer. Result buffer has specific format defined in the PAPR
+specification. One of the fields is counter offset and width of the
+counter data returned.
+
+Counter data are returned in a unsigned char array in big endian byte
+order. To get the final counter data, the values must be left shifted
+byte at a time. But commit 220a0c609ad17 ("powerpc/perf: Add support for
+the hv gpci (get performance counter info) interface") made the shifting
+bitwise and also assumed little endian order. Because of that, hcall
+counters values are reported incorrectly.
+
+In particular this can lead to counters go backwards which messes up the
+counter prev vs now calculation and leads to huge counter value
+reporting:
+
+ #: perf stat -e hv_gpci/system_tlbie_count_and_time_tlbie_instructions_issued/
+ -C 0 -I 1000
+ time counts unit events
+ 1.000078854 18,446,744,073,709,535,232 hv_gpci/system_tlbie_count_and_time_tlbie_instructions_issued/
+ 2.000213293 0 hv_gpci/system_tlbie_count_and_time_tlbie_instructions_issued/
+ 3.000320107 0 hv_gpci/system_tlbie_count_and_time_tlbie_instructions_issued/
+ 4.000428392 0 hv_gpci/system_tlbie_count_and_time_tlbie_instructions_issued/
+ 5.000537864 0 hv_gpci/system_tlbie_count_and_time_tlbie_instructions_issued/
+ 6.000649087 0 hv_gpci/system_tlbie_count_and_time_tlbie_instructions_issued/
+ 7.000760312 0 hv_gpci/system_tlbie_count_and_time_tlbie_instructions_issued/
+ 8.000865218 16,448 hv_gpci/system_tlbie_count_and_time_tlbie_instructions_issued/
+ 9.000978985 18,446,744,073,709,535,232 hv_gpci/system_tlbie_count_and_time_tlbie_instructions_issued/
+ 10.001088891 16,384 hv_gpci/system_tlbie_count_and_time_tlbie_instructions_issued/
+ 11.001201435 0 hv_gpci/system_tlbie_count_and_time_tlbie_instructions_issued/
+ 12.001307937 18,446,744,073,709,535,232 hv_gpci/system_tlbie_count_and_time_tlbie_instructions_issued/
+
+Fix the shifting logic to correct match the format, ie. read bytes in
+big endian order.
+
+Fixes: e4f226b1580b ("powerpc/perf/hv-gpci: Increase request buffer size")
+Cc: stable@vger.kernel.org # v4.6+
+Reported-by: Nageswara R Sastry<rnsastry@linux.ibm.com>
+Signed-off-by: Kajol Jain <kjain@linux.ibm.com>
+Tested-by: Nageswara R Sastry<rnsastry@linux.ibm.com>
+Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
+Link: https://lore.kernel.org/r/20210813082158.429023-1-kjain@linux.ibm.com
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ arch/powerpc/perf/hv-gpci.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/arch/powerpc/perf/hv-gpci.c
++++ b/arch/powerpc/perf/hv-gpci.c
+@@ -168,7 +168,7 @@ static unsigned long single_gpci_request
+ */
+ count = 0;
+ for (i = offset; i < offset + length; i++)
+- count |= arg->bytes[i] << (i - offset);
++ count |= (u64)(arg->bytes[i]) << ((length - 1 - (i - offset)) * 8);
+
+ *value = count;
+ out:
--- /dev/null
+From 8d448fa0a8bb1c8d94eef7647edffe9ac81a281e Mon Sep 17 00:00:00 2001
+From: Dmitry Osipenko <digetx@gmail.com>
+Date: Sun, 8 Aug 2021 19:00:30 +0300
+Subject: rtc: tps65910: Correct driver module alias
+
+From: Dmitry Osipenko <digetx@gmail.com>
+
+commit 8d448fa0a8bb1c8d94eef7647edffe9ac81a281e upstream.
+
+The TPS65910 RTC driver module doesn't auto-load because of the wrong
+module alias that doesn't match the device name, fix it.
+
+Cc: stable@vger.kernel.org
+Reported-by: Anton Bambura <jenneron@protonmail.com>
+Tested-by: Anton Bambura <jenneron@protonmail.com>
+Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
+Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
+Link: https://lore.kernel.org/r/20210808160030.8556-1-digetx@gmail.com
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ drivers/rtc/rtc-tps65910.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/drivers/rtc/rtc-tps65910.c
++++ b/drivers/rtc/rtc-tps65910.c
+@@ -470,6 +470,6 @@ static struct platform_driver tps65910_r
+ };
+
+ module_platform_driver(tps65910_rtc_driver);
+-MODULE_ALIAS("platform:rtc-tps65910");
++MODULE_ALIAS("platform:tps65910-rtc");
+ MODULE_AUTHOR("Venu Byravarasu <vbyravarasu@nvidia.com>");
+ MODULE_LICENSE("GPL");
fbmem-don-t-allow-too-huge-resolutions.patch
backlight-pwm_bl-improve-bootloader-kernel-device-handover.patch
clk-kirkwood-fix-a-clocking-boot-regression.patch
+rtc-tps65910-correct-driver-module-alias.patch
+btrfs-reset-replace-target-device-to-allocation-state-on-close.patch
+blk-zoned-allow-zone-management-send-operations-without-cap_sys_admin.patch
+blk-zoned-allow-blkreportzone-without-cap_sys_admin.patch
+pci-msi-skip-masking-msi-x-on-xen-pv.patch
+powerpc-perf-hv-gpci-fix-counter-value-parsing.patch
+xen-fix-setting-of-max_pfn-in-shared_info.patch
+include-linux-list.h-add-a-macro-to-test-if-entry-is-pointing-to-the-head.patch
+9p-xen-fix-end-of-loop-tests-for-list_for_each_entry.patch
--- /dev/null
+From 4b511d5bfa74b1926daefd1694205c7f1bcf677f Mon Sep 17 00:00:00 2001
+From: Juergen Gross <jgross@suse.com>
+Date: Fri, 30 Jul 2021 11:26:21 +0200
+Subject: xen: fix setting of max_pfn in shared_info
+
+From: Juergen Gross <jgross@suse.com>
+
+commit 4b511d5bfa74b1926daefd1694205c7f1bcf677f upstream.
+
+Xen PV guests are specifying the highest used PFN via the max_pfn
+field in shared_info. This value is used by the Xen tools when saving
+or migrating the guest.
+
+Unfortunately this field is misnamed, as in reality it is specifying
+the number of pages (including any memory holes) of the guest, so it
+is the highest used PFN + 1. Renaming isn't possible, as this is a
+public Xen hypervisor interface which needs to be kept stable.
+
+The kernel will set the value correctly initially at boot time, but
+when adding more pages (e.g. due to memory hotplug or ballooning) a
+real PFN number is stored in max_pfn. This is done when expanding the
+p2m array, and the PFN stored there is even possibly wrong, as it
+should be the last possible PFN of the just added P2M frame, and not
+one which led to the P2M expansion.
+
+Fix that by setting shared_info->max_pfn to the last possible PFN + 1.
+
+Fixes: 98dd166ea3a3c3 ("x86/xen/p2m: hint at the last populated P2M entry")
+Cc: stable@vger.kernel.org
+Signed-off-by: Juergen Gross <jgross@suse.com>
+Reviewed-by: Jan Beulich <jbeulich@suse.com>
+Link: https://lore.kernel.org/r/20210730092622.9973-2-jgross@suse.com
+Signed-off-by: Juergen Gross <jgross@suse.com>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ arch/x86/xen/p2m.c | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+--- a/arch/x86/xen/p2m.c
++++ b/arch/x86/xen/p2m.c
+@@ -613,8 +613,8 @@ int xen_alloc_p2m_entry(unsigned long pf
+ }
+
+ /* Expanded the p2m? */
+- if (pfn > xen_p2m_last_pfn) {
+- xen_p2m_last_pfn = pfn;
++ if (pfn >= xen_p2m_last_pfn) {
++ xen_p2m_last_pfn = ALIGN(pfn + 1, P2M_PER_PAGE);
+ HYPERVISOR_shared_info->arch.max_pfn = xen_p2m_last_pfn;
+ }
+
projects / thirdparty / kernel / stable-queue.git / commitdiff
