From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, Thomas Huth <thuth@redhat.com>,
Paul Mackerras <paulus@ozlabs.org>,
Michael Ellerman <mpe@ellerman.id.au>
Subject: [PATCH 3.14 07/29] powerpc: Fix definition of SIAR and SDAR registers
Date: Wed, 22 Jun 2016 15:37:15 -0700 [thread overview]
Message-ID: <20160622223530.923404252@linuxfoundation.org> (raw)
In-Reply-To: <20160622223530.496939726@linuxfoundation.org>
3.14-stable review patch. If anyone has any objections, please let me know.
------------------
From: Thomas Huth <thuth@redhat.com>
commit d23fac2b27d94aeb7b65536a50d32bfdc21fe01e upstream.
The SIAR and SDAR registers are available twice, one time as SPRs
780 / 781 (unprivileged, but read-only), and one time as the SPRs
796 / 797 (privileged, but read and write). The Linux kernel code
currently uses the unprivileged SPRs - while this is OK for reading,
writing to that register of course does not work.
Since the KVM code tries to write to this register, too (see the mtspr
in book3s_hv_rmhandlers.S), the contents of this register sometimes get
lost for the guests, e.g. during migration of a VM.
To fix this issue, simply switch to the privileged SPR numbers instead.
Signed-off-by: Thomas Huth <thuth@redhat.com>
Acked-by: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/powerpc/include/asm/reg.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/arch/powerpc/include/asm/reg.h
+++ b/arch/powerpc/include/asm/reg.h
@@ -715,13 +715,13 @@
#define SPRN_PMC6 792
#define SPRN_PMC7 793
#define SPRN_PMC8 794
-#define SPRN_SIAR 780
-#define SPRN_SDAR 781
#define SPRN_SIER 784
#define SIER_SIPR 0x2000000 /* Sampled MSR_PR */
#define SIER_SIHV 0x1000000 /* Sampled MSR_HV */
#define SIER_SIAR_VALID 0x0400000 /* SIAR contents valid */
#define SIER_SDAR_VALID 0x0200000 /* SDAR contents valid */
+#define SPRN_SIAR 796
+#define SPRN_SDAR 797
#define SPRN_TACR 888
#define SPRN_TCSCR 889
#define SPRN_CSIGR 890
next prev parent reply other threads:[~2016-06-22 23:26 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-22 22:37 [PATCH 3.14 00/29] 3.14.73-stable review Greg Kroah-Hartman
2016-06-22 22:37 ` [PATCH 3.14 01/29] netlink: Fix dump skb leak/double free Greg Kroah-Hartman
2016-06-22 22:37 ` [PATCH 3.14 02/29] sfc: on MC reset, clear PIO buffer linkage in TXQs Greg Kroah-Hartman
2016-06-22 22:37 ` [PATCH 3.14 03/29] tcp: record TLP and ER timer stats in v6 stats Greg Kroah-Hartman
2016-06-22 22:37 ` [PATCH 3.14 05/29] ARM: fix PTRACE_SETVFPREGS on SMP systems Greg Kroah-Hartman
2016-06-22 22:37 ` [PATCH 3.14 06/29] crypto: ccp - Fix AES XTS error for request sizes above 4096 Greg Kroah-Hartman
2016-06-22 22:37 ` Greg Kroah-Hartman [this message]
2016-06-22 22:37 ` [PATCH 3.14 08/29] powerpc: Use privileged SPR number for MMCR2 Greg Kroah-Hartman
2016-06-22 22:37 ` [PATCH 3.14 09/29] parisc: Fix pagefault crash in unaligned __get_user() call Greg Kroah-Hartman
2016-06-22 22:37 ` [PATCH 3.14 10/29] ecryptfs: forbid opening files without mmap handler Greg Kroah-Hartman
2016-06-22 22:37 ` [PATCH 3.14 11/29] wext: Fix 32 bit iwpriv compatibility issue with 64 bit Kernel Greg Kroah-Hartman
2016-06-22 22:37 ` [PATCH 3.14 12/29] fix d_walk()/non-delayed __d_free() race Greg Kroah-Hartman
2016-06-22 22:37 ` [PATCH 3.14 13/29] MIPS: Fix 64k page support for 32 bit kernels Greg Kroah-Hartman
2016-06-22 22:37 ` [PATCH 3.14 14/29] powerpc/pseries/eeh: Handle RTAS delay requests in configure_bridge Greg Kroah-Hartman
2016-06-22 22:37 ` [PATCH 3.14 15/29] netfilter: x_tables: validate e->target_offset early Greg Kroah-Hartman
2016-06-22 22:37 ` [PATCH 3.14 16/29] netfilter: x_tables: make sure e->next_offset covers remaining blob size Greg Kroah-Hartman
2016-06-22 22:37 ` [PATCH 3.14 17/29] netfilter: x_tables: fix unconditional helper Greg Kroah-Hartman
2016-06-22 22:37 ` [PATCH 3.14 18/29] xfs: fix up backport error in fs/xfs/xfs_inode.c Greg Kroah-Hartman
2016-06-22 22:37 ` [PATCH 3.14 19/29] pipe: limit the per-user amount of pages allocated in pipes Greg Kroah-Hartman
2016-06-22 22:37 ` [PATCH 3.14 20/29] netfilter: x_tables: dont move to non-existent next rule Greg Kroah-Hartman
2016-06-22 22:37 ` [PATCH 3.14 21/29] netfilter: x_tables: validate targets of jumps Greg Kroah-Hartman
2016-06-23 8:54 ` Florian Westphal
2016-06-23 9:13 ` Florian Westphal
2016-06-24 2:46 ` Greg Kroah-Hartman
2016-06-22 22:37 ` [PATCH 3.14 22/29] netfilter: x_tables: add and use xt_check_entry_offsets Greg Kroah-Hartman
2016-06-22 22:37 ` [PATCH 3.14 23/29] netfilter: x_tables: kill check_entry helper Greg Kroah-Hartman
2016-06-22 22:37 ` [PATCH 3.14 24/29] netfilter: x_tables: assert minimum target size Greg Kroah-Hartman
2016-06-22 22:37 ` [PATCH 3.14 25/29] netfilter: x_tables: add compat version of xt_check_entry_offsets Greg Kroah-Hartman
2016-06-22 22:37 ` [PATCH 3.14 26/29] netfilter: x_tables: check standard target size too Greg Kroah-Hartman
2016-06-22 22:37 ` [PATCH 3.14 27/29] netfilter: x_tables: check for bogus target offset Greg Kroah-Hartman
2016-06-22 22:37 ` [PATCH 3.14 28/29] netfilter: x_tables: validate all offsets and sizes in a rule Greg Kroah-Hartman
2016-06-22 22:37 ` [PATCH 3.14 29/29] netfilter: x_tables: dont reject valid target size on some architectures Greg Kroah-Hartman
2016-06-23 4:54 ` [PATCH 3.14 00/29] 3.14.73-stable review -rc2 Greg Kroah-Hartman
2016-06-23 19:41 ` Guenter Roeck
2016-06-23 21:54 ` Shuah Khan
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