--- /dev/null
+From b75f4c9afac2604feb971441116c07a24ecca1ec Mon Sep 17 00:00:00 2001
+From: Ekaterina Tumanova <tumanova@linux.vnet.ibm.com>
+Date: Tue, 3 Mar 2015 09:54:41 +0100
+Subject: KVM: s390: Zero out current VMDB of STSI before including level3 data.
+
+From: Ekaterina Tumanova <tumanova@linux.vnet.ibm.com>
+
+commit b75f4c9afac2604feb971441116c07a24ecca1ec upstream.
+
+s390 documentation requires words 0 and 10-15 to be reserved and stored as
+zeros. As we fill out all other fields, we can memset the full structure.
+
+Signed-off-by: Ekaterina Tumanova <tumanova@linux.vnet.ibm.com>
+Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
+Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+---
+ arch/s390/kvm/priv.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+--- a/arch/s390/kvm/priv.c
++++ b/arch/s390/kvm/priv.c
+@@ -414,6 +414,7 @@ static void handle_stsi_3_2_2(struct kvm
+ for (n = mem->count - 1; n > 0 ; n--)
+ memcpy(&mem->vm[n], &mem->vm[n - 1], sizeof(mem->vm[0]));
+
++ memset(&mem->vm[0], 0, sizeof(mem->vm[0]));
+ mem->vm[0].cpus_total = cpus;
+ mem->vm[0].cpus_configured = cpus;
+ mem->vm[0].cpus_standby = 0;
--- /dev/null
+From ca3f0874723fad81d0c701b63ae3a17a408d5f25 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Radim=20Kr=C4=8Dm=C3=A1=C5=99?= <rkrcmar@redhat.com>
+Date: Wed, 8 Apr 2015 14:16:48 +0200
+Subject: KVM: use slowpath for cross page cached accesses
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+From: =?UTF-8?q?Radim=20Kr=C4=8Dm=C3=A1=C5=99?= <rkrcmar@redhat.com>
+
+commit ca3f0874723fad81d0c701b63ae3a17a408d5f25 upstream.
+
+kvm_write_guest_cached() does not mark all written pages as dirty and
+code comments in kvm_gfn_to_hva_cache_init() talk about NULL memslot
+with cross page accesses. Fix all the easy way.
+
+The check is '<= 1' to have the same result for 'len = 0' cache anywhere
+in the page. (nr_pages_needed is 0 on page boundary.)
+
+Fixes: 8f964525a121 ("KVM: Allow cross page reads and writes from cached translations.")
+Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
+Message-Id: <20150408121648.GA3519@potion.brq.redhat.com>
+Reviewed-by: Wanpeng Li <wanpeng.li@linux.intel.com>
+Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+---
+ virt/kvm/kvm_main.c | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+--- a/virt/kvm/kvm_main.c
++++ b/virt/kvm/kvm_main.c
+@@ -1549,8 +1549,8 @@ int kvm_gfn_to_hva_cache_init(struct kvm
+ ghc->generation = slots->generation;
+ ghc->len = len;
+ ghc->memslot = gfn_to_memslot(kvm, start_gfn);
+- ghc->hva = gfn_to_hva_many(ghc->memslot, start_gfn, &nr_pages_avail);
+- if (!kvm_is_error_hva(ghc->hva) && nr_pages_avail >= nr_pages_needed) {
++ ghc->hva = gfn_to_hva_many(ghc->memslot, start_gfn, NULL);
++ if (!kvm_is_error_hva(ghc->hva) && nr_pages_needed <= 1) {
+ ghc->hva += offset;
+ } else {
+ /*
--- /dev/null
+From a843d00d038b11267279e3b5388222320f9ddc1d Mon Sep 17 00:00:00 2001
+From: Huacai Chen <chenhc@lemote.com>
+Date: Sun, 29 Mar 2015 10:54:05 +0800
+Subject: MIPS: Hibernate: flush TLB entries earlier
+
+From: Huacai Chen <chenhc@lemote.com>
+
+commit a843d00d038b11267279e3b5388222320f9ddc1d upstream.
+
+We found that TLB mismatch not only happens after kernel resume, but
+also happens during snapshot restore. So move it to the beginning of
+swsusp_arch_suspend().
+
+Signed-off-by: Huacai Chen <chenhc@lemote.com>
+Cc: Steven J. Hill <Steven.Hill@imgtec.com>
+Cc: linux-mips@linux-mips.org
+Cc: Fuxin Zhang <zhangfx@lemote.com>
+Cc: Zhangjin Wu <wuzhangjin@gmail.com>
+Patchwork: https://patchwork.linux-mips.org/patch/9621/
+Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+---
+ arch/mips/power/hibernate.S | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+--- a/arch/mips/power/hibernate.S
++++ b/arch/mips/power/hibernate.S
+@@ -30,6 +30,8 @@ LEAF(swsusp_arch_suspend)
+ END(swsusp_arch_suspend)
+
+ LEAF(swsusp_arch_resume)
++ /* Avoid TLB mismatch during and after kernel resume */
++ jal local_flush_tlb_all
+ PTR_L t0, restore_pblist
+ 0:
+ PTR_L t1, PBE_ADDRESS(t0) /* source */
+@@ -43,7 +45,6 @@ LEAF(swsusp_arch_resume)
+ bne t1, t3, 1b
+ PTR_L t0, PBE_NEXT(t0)
+ bnez t0, 0b
+- jal local_flush_tlb_all /* Avoid TLB mismatch after kernel resume */
+ PTR_LA t0, saved_regs
+ PTR_L ra, PT_R31(t0)
+ PTR_L sp, PT_R29(t0)
--- /dev/null
+From d74419495633493c9cd3f2bbeb7f3529d0edded6 Mon Sep 17 00:00:00 2001
+From: Heiko Carstens <heiko.carstens@de.ibm.com>
+Date: Wed, 25 Mar 2015 10:13:33 +0100
+Subject: s390/hibernate: fix save and restore of kernel text section
+
+From: Heiko Carstens <heiko.carstens@de.ibm.com>
+
+commit d74419495633493c9cd3f2bbeb7f3529d0edded6 upstream.
+
+Sebastian reported a crash caused by a jump label mismatch after resume.
+This happens because we do not save the kernel text section during suspend
+and therefore also do not restore it during resume, but use the kernel image
+that restores the old system.
+
+This means that after a suspend/resume cycle we lost all modifications done
+to the kernel text section.
+The reason for this is the pfn_is_nosave() function, which incorrectly
+returns that read-only pages don't need to be saved. This is incorrect since
+we mark the kernel text section read-only.
+We still need to make sure to not save and restore pages contained within
+NSS and DCSS segment.
+To fix this add an extra case for the kernel text section and only save
+those pages if they are not contained within an NSS segment.
+
+Fixes the following crash (and the above bugs as well):
+
+Jump label code mismatch at netif_receive_skb_internal+0x28/0xd0
+Found: c0 04 00 00 00 00
+Expected: c0 f4 00 00 00 11
+New: c0 04 00 00 00 00
+Kernel panic - not syncing: Corrupted kernel text
+CPU: 0 PID: 9 Comm: migration/0 Not tainted 3.19.0-01975-gb1b096e70f23 #4
+Call Trace:
+ [<0000000000113972>] show_stack+0x72/0xf0
+ [<000000000081f15e>] dump_stack+0x6e/0x90
+ [<000000000081c4e8>] panic+0x108/0x2b0
+ [<000000000081be64>] jump_label_bug.isra.2+0x104/0x108
+ [<0000000000112176>] __jump_label_transform+0x9e/0xd0
+ [<00000000001121e6>] __sm_arch_jump_label_transform+0x3e/0x50
+ [<00000000001d1136>] multi_cpu_stop+0x12e/0x170
+ [<00000000001d1472>] cpu_stopper_thread+0xb2/0x168
+ [<000000000015d2ac>] smpboot_thread_fn+0x134/0x1b0
+ [<0000000000158baa>] kthread+0x10a/0x110
+ [<0000000000824a86>] kernel_thread_starter+0x6/0xc
+
+Reported-and-tested-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
+Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
+Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+---
+ arch/s390/kernel/suspend.c | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+--- a/arch/s390/kernel/suspend.c
++++ b/arch/s390/kernel/suspend.c
+@@ -142,6 +142,8 @@ int pfn_is_nosave(unsigned long pfn)
+ {
+ unsigned long nosave_begin_pfn = PFN_DOWN(__pa(&__nosave_begin));
+ unsigned long nosave_end_pfn = PFN_DOWN(__pa(&__nosave_end));
++ unsigned long eshared_pfn = PFN_DOWN(__pa(&_eshared)) - 1;
++ unsigned long stext_pfn = PFN_DOWN(__pa(&_stext));
+
+ /* Always save lowcore pages (LC protection might be enabled). */
+ if (pfn <= LC_PAGES)
+@@ -149,6 +151,8 @@ int pfn_is_nosave(unsigned long pfn)
+ if (pfn >= nosave_begin_pfn && pfn < nosave_end_pfn)
+ return 1;
+ /* Skip memory holes and read-only pages (NSS, DCSS, ...). */
++ if (pfn >= stext_pfn && pfn <= eshared_pfn)
++ return ipl_info.type == IPL_TYPE_NSS ? 1 : 0;
+ if (tprot(PFN_PHYS(pfn)))
+ return 1;
+ return 0;
btrfs-fix-inode-eviction-infinite-loop-after-extent_same-ioctl.patch
sched-idle-x86-restore-mwait_idle-to-fix-boot-hangs-to-improve-power-savings-and-to-improve-performance.patch
usb-gadget-composite-enable-besl-support.patch
+kvm-s390-zero-out-current-vmdb-of-stsi-before-including-level3-data.patch
+s390-hibernate-fix-save-and-restore-of-kernel-text-section.patch
+kvm-use-slowpath-for-cross-page-cached-accesses.patch
+mips-hibernate-flush-tlb-entries-earlier.patch
projects / thirdparty / kernel / stable-queue.git / commitdiff
