<feed xmlns='http://www.w3.org/2005/Atom'>
<title>linux.git/arch/arm64, branch v6.0</title>
<subtitle>Linux kernel source tree</subtitle>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/'/>
<entry>
<title>Merge tag 'soc-fixes-6.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc</title>
<updated>2022-09-27T23:49:42+00:00</updated>
<author>
<name>Linus Torvalds</name>
<email>torvalds@linux-foundation.org</email>
</author>
<published>2022-09-27T23:49:42+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=49c13ed0316d55d73f1c81c66a7e2abd743f9ae6'/>
<id>49c13ed0316d55d73f1c81c66a7e2abd743f9ae6</id>
<content type='text'>
Pull ARM SoC fixes from Arnd Bergmann:
 "This should be the last set of bugfixes in the SoC tree:

   - Two fixes for Arm integrator, dealing with a regression caused by
     invalid DT properties combined with a change in dma address
     translation, and missing device_type annotations on the PCI bus

   - Fixes for drivers/reset/, addressing bugs in i.MX8MP, Sparx5 and
     NPCM8XX platforms

   - Bjorn Andersson's email address changes in the MAINTAINERS file

   - Multiple minor fixes to Qualcomm dts files, and a change to the
     remoteproc firmware filename that did not match the actual path in
     the linux-firmware package

   - Minor code fixes for the Allwinner/sunxi SRAM driver, and the
     broadcom STB Bus Interface Unit driver

   - A build fix for the sunplus sp7021 platform

   - Two dts fixes for TI OMAP family SoCs, addressing an extraneous
     usb4 device node and an incorrect DMA handle"

* tag 'soc-fixes-6.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc:
  ARM: dts: integrator: Fix DMA ranges
  ARM: dts: integrator: Tag PCI host with device_type
  ARM: sunplus: fix serial console kconfig and build problems
  reset: npcm: fix iprst2 and iprst4 setting
  arm64: dts: qcom: sm8350: fix UFS PHY serdes size
  soc: bcm: brcmstb: biuctrl: Avoid double of_node_put()
  arm64: dts: qcom: sc8280xp-x13s: Update firmware location
  soc: sunxi: sram: Fix debugfs info for A64 SRAM C
  soc: sunxi: sram: Fix probe function ordering issues
  soc: sunxi: sram: Prevent the driver from being unbound
  soc: sunxi: sram: Actually claim SRAM regions
  ARM: dts: am5748: keep usb4_tm disabled
  reset: microchip-sparx5: issue a reset on startup
  reset: imx7: Fix the iMX8MP PCIe PHY PERST support
  MAINTAINERS: Update Bjorn's email address
  arm64: dts: qcom: sc7280: move USB wakeup-source property
  arm64: dts: qcom: thinkpad-x13s: Fix firmware location
  arm64: dts: qcom: sm8150: Fix fastrpc iommu values
  ARM: dts: am33xx: Fix MMCHS0 dma properties
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Pull ARM SoC fixes from Arnd Bergmann:
 "This should be the last set of bugfixes in the SoC tree:

   - Two fixes for Arm integrator, dealing with a regression caused by
     invalid DT properties combined with a change in dma address
     translation, and missing device_type annotations on the PCI bus

   - Fixes for drivers/reset/, addressing bugs in i.MX8MP, Sparx5 and
     NPCM8XX platforms

   - Bjorn Andersson's email address changes in the MAINTAINERS file

   - Multiple minor fixes to Qualcomm dts files, and a change to the
     remoteproc firmware filename that did not match the actual path in
     the linux-firmware package

   - Minor code fixes for the Allwinner/sunxi SRAM driver, and the
     broadcom STB Bus Interface Unit driver

   - A build fix for the sunplus sp7021 platform

   - Two dts fixes for TI OMAP family SoCs, addressing an extraneous
     usb4 device node and an incorrect DMA handle"

* tag 'soc-fixes-6.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc:
  ARM: dts: integrator: Fix DMA ranges
  ARM: dts: integrator: Tag PCI host with device_type
  ARM: sunplus: fix serial console kconfig and build problems
  reset: npcm: fix iprst2 and iprst4 setting
  arm64: dts: qcom: sm8350: fix UFS PHY serdes size
  soc: bcm: brcmstb: biuctrl: Avoid double of_node_put()
  arm64: dts: qcom: sc8280xp-x13s: Update firmware location
  soc: sunxi: sram: Fix debugfs info for A64 SRAM C
  soc: sunxi: sram: Fix probe function ordering issues
  soc: sunxi: sram: Prevent the driver from being unbound
  soc: sunxi: sram: Actually claim SRAM regions
  ARM: dts: am5748: keep usb4_tm disabled
  reset: microchip-sparx5: issue a reset on startup
  reset: imx7: Fix the iMX8MP PCIe PHY PERST support
  MAINTAINERS: Update Bjorn's email address
  arm64: dts: qcom: sc7280: move USB wakeup-source property
  arm64: dts: qcom: thinkpad-x13s: Fix firmware location
  arm64: dts: qcom: sm8150: Fix fastrpc iommu values
  ARM: dts: am33xx: Fix MMCHS0 dma properties
</pre>
</div>
</content>
</entry>
<entry>
<title>Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux</title>
<updated>2022-09-23T22:28:51+00:00</updated>
<author>
<name>Linus Torvalds</name>
<email>torvalds@linux-foundation.org</email>
</author>
<published>2022-09-23T22:28:51+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=a63f2e7cb1107ab124f80407e5eb8579c04eb7a9'/>
<id>a63f2e7cb1107ab124f80407e5eb8579c04eb7a9</id>
<content type='text'>
Pull arm64 fixes from Will Deacon:
 "These are all very simple and self-contained, although the CFI
  jump-table fix touches the generic linker script as that's where the
  problematic macro lives.

   - Fix false positive "sleeping while atomic" warning resulting from
     the kPTI rework taking a mutex too early.

   - Fix possible overflow in AMU frequency calculation

   - Fix incorrect shift in CMN PMU driver which causes problems with
     newer versions of the IP

   - Reduce alignment of the CFI jump table to avoid huge kernel images
     and link errors with !4KiB page size configurations"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  vmlinux.lds.h: CFI: Reduce alignment of jump-table to function alignment
  perf/arm-cmn: Add more bits to child node address offset field
  arm64: topology: fix possible overflow in amu_fie_setup()
  arm64: mm: don't acquire mutex when rewriting swapper
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Pull arm64 fixes from Will Deacon:
 "These are all very simple and self-contained, although the CFI
  jump-table fix touches the generic linker script as that's where the
  problematic macro lives.

   - Fix false positive "sleeping while atomic" warning resulting from
     the kPTI rework taking a mutex too early.

   - Fix possible overflow in AMU frequency calculation

   - Fix incorrect shift in CMN PMU driver which causes problems with
     newer versions of the IP

   - Reduce alignment of the CFI jump table to avoid huge kernel images
     and link errors with !4KiB page size configurations"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  vmlinux.lds.h: CFI: Reduce alignment of jump-table to function alignment
  perf/arm-cmn: Add more bits to child node address offset field
  arm64: topology: fix possible overflow in amu_fie_setup()
  arm64: mm: don't acquire mutex when rewriting swapper
</pre>
</div>
</content>
</entry>
<entry>
<title>Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm</title>
<updated>2022-09-23T15:42:30+00:00</updated>
<author>
<name>Linus Torvalds</name>
<email>torvalds@linux-foundation.org</email>
</author>
<published>2022-09-23T15:42:30+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=317fab7ec55d5a150bce46f37efbc942013a8c5b'/>
<id>317fab7ec55d5a150bce46f37efbc942013a8c5b</id>
<content type='text'>
Pull kvm fixes from Paolo Bonzini:
 "As everyone back came back from conferences, here are the pending
  patches for Linux 6.0.

  ARM:

   - Fix for kmemleak with pKVM

  s390:

   - Fixes for VFIO with zPCI

   - smatch fix

  x86:

   - Ensure XSAVE-capable hosts always allow FP and SSE state to be
     saved and restored via KVM_{GET,SET}_XSAVE

   - Fix broken max_mmu_rmap_size stat

   - Fix compile error with old glibc that doesn't have gettid()"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: x86: Inject #UD on emulated XSETBV if XSAVES isn't enabled
  KVM: x86: Always enable legacy FP/SSE in allowed user XFEATURES
  KVM: x86: Reinstate kvm_vcpu_arch.guest_supported_xcr0
  KVM: x86/mmu: add missing update to max_mmu_rmap_size
  selftests: kvm: Fix a compile error in selftests/kvm/rseq_test.c
  KVM: s390: pci: register pci hooks without interpretation
  KVM: s390: pci: fix GAIT physical vs virtual pointers usage
  KVM: s390: Pass initialized arg even if unused
  KVM: s390: pci: fix plain integer as NULL pointer warnings
  KVM: arm64: Use kmemleak_free_part_phys() to unregister hyp_mem_base
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Pull kvm fixes from Paolo Bonzini:
 "As everyone back came back from conferences, here are the pending
  patches for Linux 6.0.

  ARM:

   - Fix for kmemleak with pKVM

  s390:

   - Fixes for VFIO with zPCI

   - smatch fix

  x86:

   - Ensure XSAVE-capable hosts always allow FP and SSE state to be
     saved and restored via KVM_{GET,SET}_XSAVE

   - Fix broken max_mmu_rmap_size stat

   - Fix compile error with old glibc that doesn't have gettid()"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: x86: Inject #UD on emulated XSETBV if XSAVES isn't enabled
  KVM: x86: Always enable legacy FP/SSE in allowed user XFEATURES
  KVM: x86: Reinstate kvm_vcpu_arch.guest_supported_xcr0
  KVM: x86/mmu: add missing update to max_mmu_rmap_size
  selftests: kvm: Fix a compile error in selftests/kvm/rseq_test.c
  KVM: s390: pci: register pci hooks without interpretation
  KVM: s390: pci: fix GAIT physical vs virtual pointers usage
  KVM: s390: Pass initialized arg even if unused
  KVM: s390: pci: fix plain integer as NULL pointer warnings
  KVM: arm64: Use kmemleak_free_part_phys() to unregister hyp_mem_base
</pre>
</div>
</content>
</entry>
<entry>
<title>Merge tag 'qcom-arm64-fixes-for-6.0' of https://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux into arm/fixes</title>
<updated>2022-09-23T14:44:37+00:00</updated>
<author>
<name>Arnd Bergmann</name>
<email>arnd@arndb.de</email>
</author>
<published>2022-09-23T14:44:37+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=c69badd1d74690e5b5b4d5c3c254a1e64bcc1ac9'/>
<id>c69badd1d74690e5b5b4d5c3c254a1e64bcc1ac9</id>
<content type='text'>
Qualcomm ARM64 DTS fixes for 6.0

This corrects invalid IOMMU streams for the SM8150 CDSP FastRPC, moves
the wakeup-source of SC7280 USB nodes to the correct place, fixes the
SM8350 UFS PHY serdes size to not overlap with the other subnodes and
updates the firmware location for the Lenovo ThinkPad X13s to match the
movement in linux-firmware.

It also updates MAINTAINERS and .mailmap to reflect the changes in my
email address.

* tag 'qcom-arm64-fixes-for-6.0' of https://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux:
  arm64: dts: qcom: sm8350: fix UFS PHY serdes size
  arm64: dts: qcom: sc8280xp-x13s: Update firmware location
  MAINTAINERS: Update Bjorn's email address
  arm64: dts: qcom: sc7280: move USB wakeup-source property
  arm64: dts: qcom: thinkpad-x13s: Fix firmware location
  arm64: dts: qcom: sm8150: Fix fastrpc iommu values

Link: https://lore.kernel.org/r/20220921142939.1310163-1-andersson@kernel.org
Signed-off-by: Arnd Bergmann &lt;arnd@arndb.de&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Qualcomm ARM64 DTS fixes for 6.0

This corrects invalid IOMMU streams for the SM8150 CDSP FastRPC, moves
the wakeup-source of SC7280 USB nodes to the correct place, fixes the
SM8350 UFS PHY serdes size to not overlap with the other subnodes and
updates the firmware location for the Lenovo ThinkPad X13s to match the
movement in linux-firmware.

It also updates MAINTAINERS and .mailmap to reflect the changes in my
email address.

* tag 'qcom-arm64-fixes-for-6.0' of https://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux:
  arm64: dts: qcom: sm8350: fix UFS PHY serdes size
  arm64: dts: qcom: sc8280xp-x13s: Update firmware location
  MAINTAINERS: Update Bjorn's email address
  arm64: dts: qcom: sc7280: move USB wakeup-source property
  arm64: dts: qcom: thinkpad-x13s: Fix firmware location
  arm64: dts: qcom: sm8150: Fix fastrpc iommu values

Link: https://lore.kernel.org/r/20220921142939.1310163-1-andersson@kernel.org
Signed-off-by: Arnd Bergmann &lt;arnd@arndb.de&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>Merge tag 'kvm-s390-master-6.0-2' of https://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD</title>
<updated>2022-09-23T14:06:08+00:00</updated>
<author>
<name>Paolo Bonzini</name>
<email>pbonzini@redhat.com</email>
</author>
<published>2022-09-23T14:06:08+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=69604fe76e58c9d195e48b41d019b07fc27ce9d7'/>
<id>69604fe76e58c9d195e48b41d019b07fc27ce9d7</id>
<content type='text'>
More pci fixes
Fix for a code analyser warning
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
More pci fixes
Fix for a code analyser warning
</pre>
</div>
</content>
</entry>
<entry>
<title>Merge tag 'kvmarm-fixes-6.0-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD</title>
<updated>2022-09-22T21:01:33+00:00</updated>
<author>
<name>Paolo Bonzini</name>
<email>pbonzini@redhat.com</email>
</author>
<published>2022-09-22T21:01:33+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=b4ac28a32f589d389e5391f5b546c17a484915dc'/>
<id>b4ac28a32f589d389e5391f5b546c17a484915dc</id>
<content type='text'>
KVM/arm64 fixes for 6.0, take #2

- Fix kmemleak usage in Protected KVM (again)
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
KVM/arm64 fixes for 6.0, take #2

- Fix kmemleak usage in Protected KVM (again)
</pre>
</div>
</content>
</entry>
<entry>
<title>Merge tag 'soc-fixes-6.0-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc</title>
<updated>2022-09-22T18:10:11+00:00</updated>
<author>
<name>Linus Torvalds</name>
<email>torvalds@linux-foundation.org</email>
</author>
<published>2022-09-22T18:10:11+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=c69cf88cda5faca0e411babb67ac0d8bfd8b4646'/>
<id>c69cf88cda5faca0e411babb67ac0d8bfd8b4646</id>
<content type='text'>
Pull ARM SoC fixes from Arnd Bergmann:
 "Another set of fixes for fixes for the soc tree:

   - A fix for the interrupt number on at91/lan966 ethernet PHYs

   - A second round of fixes for NXP i.MX series, including a couple of
     build issues, and board specific DT corrections on TQMa8MPQL,
     imx8mp-venice-gw74xx and imx8mm-verdin for reliability and
     partially broken functionality

   - Several fixes for Rockchip SoCs, addressing a USB issue on
     BPI-R2-Pro, wakeup on Gru-Bob and reliability of high-speed SD
     cards, among other minor issues

   - A fix for a long-running naming mistake that prevented the moxart
     mmc driver from working at all

   - Multiple Arm SCMI firmware fixes for hardening some corner cases"

* tag 'soc-fixes-6.0-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (30 commits)
  arm64: dts: imx8mp-venice-gw74xx: fix port/phy validation
  ARM: dts: lan966x: Fix the interrupt number for internal PHYs
  arm64: dts: imx8mp-venice-gw74xx: fix ksz9477 cpu port
  arm64: dts: imx8mp-venice-gw74xx: fix CAN STBY polarity
  dt-bindings: memory-controllers: fsl,imx8m-ddrc: drop Leonard Crestez
  arm64: dts: tqma8mqml: Include phy-imx8-pcie.h header
  arm64: defconfig: enable ARCH_NXP
  arm64: dts: imx8mp-tqma8mpql-mba8mpxl: add missing pinctrl for RTC alarm
  ARM: dts: fix Moxa SDIO 'compatible', remove 'sdhci' misnomer
  arm64: dts: imx8mm-verdin: extend pmic voltages
  arm64: dts: rockchip: Remove 'enable-active-low' from rk3566-quartz64-a
  arm64: dts: rockchip: Remove 'enable-active-low' from rk3399-puma
  arm64: dts: rockchip: fix property for usb2 phy supply on rk3568-evb1-v10
  arm64: dts: rockchip: fix property for usb2 phy supply on rock-3a
  arm64: dts: imx8ulp: add #reset-cells for pcc
  arm64: dts: tqma8mpxl-ba8mpxl: Fix button GPIOs
  arm64: dts: imx8mn: remove GPU power domain reset
  arm64: dts: rockchip: Set RK3399-Gru PCLK_EDP to 24 MHz
  arm64: dts: imx8mm: Reverse CPLD_Dn GPIO label mapping on MX8Menlo
  arm64: dts: rockchip: fix upper usb port on BPI-R2-Pro
  ...
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Pull ARM SoC fixes from Arnd Bergmann:
 "Another set of fixes for fixes for the soc tree:

   - A fix for the interrupt number on at91/lan966 ethernet PHYs

   - A second round of fixes for NXP i.MX series, including a couple of
     build issues, and board specific DT corrections on TQMa8MPQL,
     imx8mp-venice-gw74xx and imx8mm-verdin for reliability and
     partially broken functionality

   - Several fixes for Rockchip SoCs, addressing a USB issue on
     BPI-R2-Pro, wakeup on Gru-Bob and reliability of high-speed SD
     cards, among other minor issues

   - A fix for a long-running naming mistake that prevented the moxart
     mmc driver from working at all

   - Multiple Arm SCMI firmware fixes for hardening some corner cases"

* tag 'soc-fixes-6.0-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (30 commits)
  arm64: dts: imx8mp-venice-gw74xx: fix port/phy validation
  ARM: dts: lan966x: Fix the interrupt number for internal PHYs
  arm64: dts: imx8mp-venice-gw74xx: fix ksz9477 cpu port
  arm64: dts: imx8mp-venice-gw74xx: fix CAN STBY polarity
  dt-bindings: memory-controllers: fsl,imx8m-ddrc: drop Leonard Crestez
  arm64: dts: tqma8mqml: Include phy-imx8-pcie.h header
  arm64: defconfig: enable ARCH_NXP
  arm64: dts: imx8mp-tqma8mpql-mba8mpxl: add missing pinctrl for RTC alarm
  ARM: dts: fix Moxa SDIO 'compatible', remove 'sdhci' misnomer
  arm64: dts: imx8mm-verdin: extend pmic voltages
  arm64: dts: rockchip: Remove 'enable-active-low' from rk3566-quartz64-a
  arm64: dts: rockchip: Remove 'enable-active-low' from rk3399-puma
  arm64: dts: rockchip: fix property for usb2 phy supply on rk3568-evb1-v10
  arm64: dts: rockchip: fix property for usb2 phy supply on rock-3a
  arm64: dts: imx8ulp: add #reset-cells for pcc
  arm64: dts: tqma8mpxl-ba8mpxl: Fix button GPIOs
  arm64: dts: imx8mn: remove GPU power domain reset
  arm64: dts: rockchip: Set RK3399-Gru PCLK_EDP to 24 MHz
  arm64: dts: imx8mm: Reverse CPLD_Dn GPIO label mapping on MX8Menlo
  arm64: dts: rockchip: fix upper usb port on BPI-R2-Pro
  ...
</pre>
</div>
</content>
</entry>
<entry>
<title>arm64: topology: fix possible overflow in amu_fie_setup()</title>
<updated>2022-09-22T11:57:06+00:00</updated>
<author>
<name>Sergey Shtylyov</name>
<email>s.shtylyov@omp.ru</email>
</author>
<published>2022-09-16T20:17:07+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=d4955c0ad77dbc684fc716387070ac24801b8bca'/>
<id>d4955c0ad77dbc684fc716387070ac24801b8bca</id>
<content type='text'>
cpufreq_get_hw_max_freq() returns max frequency in kHz as *unsigned int*,
while freq_inv_set_max_ratio() gets passed this frequency in Hz as 'u64'.
Multiplying max frequency by 1000 can potentially result in overflow --
multiplying by 1000ULL instead should avoid that...

Found by Linux Verification Center (linuxtesting.org) with the SVACE static
analysis tool.

Fixes: cd0ed03a8903 ("arm64: use activity monitors for frequency invariance")
Signed-off-by: Sergey Shtylyov &lt;s.shtylyov@omp.ru&gt;
Link: https://lore.kernel.org/r/01493d64-2bce-d968-86dc-11a122a9c07d@omp.ru
Signed-off-by: Will Deacon &lt;will@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
cpufreq_get_hw_max_freq() returns max frequency in kHz as *unsigned int*,
while freq_inv_set_max_ratio() gets passed this frequency in Hz as 'u64'.
Multiplying max frequency by 1000 can potentially result in overflow --
multiplying by 1000ULL instead should avoid that...

Found by Linux Verification Center (linuxtesting.org) with the SVACE static
analysis tool.

Fixes: cd0ed03a8903 ("arm64: use activity monitors for frequency invariance")
Signed-off-by: Sergey Shtylyov &lt;s.shtylyov@omp.ru&gt;
Link: https://lore.kernel.org/r/01493d64-2bce-d968-86dc-11a122a9c07d@omp.ru
Signed-off-by: Will Deacon &lt;will@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>arm64: mm: don't acquire mutex when rewriting swapper</title>
<updated>2022-09-22T11:55:39+00:00</updated>
<author>
<name>Mark Rutland</name>
<email>mark.rutland@arm.com</email>
</author>
<published>2022-09-20T13:47:31+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=61d2d1808b20da4a45a90b4bd61ae92f729bab78'/>
<id>61d2d1808b20da4a45a90b4bd61ae92f729bab78</id>
<content type='text'>
Since commit:

  47546a1912fc4a03 ("arm64: mm: install KPTI nG mappings with MMU enabled)"

... when building with CONFIG_DEBUG_ATOMIC_SLEEP=y and booting under
QEMU TCG with '-cpu max', there's a boot-time splat:

| BUG: sleeping function called from invalid context at kernel/locking/mutex.c:580
| in_atomic(): 1, irqs_disabled(): 128, non_block: 0, pid: 15, name: migration/0
| preempt_count: 1, expected: 0
| RCU nest depth: 0, expected: 0
| no locks held by migration/0/15.
| irq event stamp: 28
| hardirqs last  enabled at (27): [&lt;ffff8000091ed180&gt;] _raw_spin_unlock_irq+0x3c/0x7c
| hardirqs last disabled at (28): [&lt;ffff8000081b8d74&gt;] multi_cpu_stop+0x150/0x18c
| softirqs last  enabled at (0): [&lt;ffff80000809a314&gt;] copy_process+0x594/0x1964
| softirqs last disabled at (0): [&lt;0000000000000000&gt;] 0x0
| CPU: 0 PID: 15 Comm: migration/0 Not tainted 6.0.0-rc3-00002-g419b42ff7eef #3
| Hardware name: linux,dummy-virt (DT)
| Stopper: multi_cpu_stop+0x0/0x18c &lt;- stop_cpus.constprop.0+0xa0/0xfc
| Call trace:
|  dump_backtrace.part.0+0xd0/0xe0
|  show_stack+0x1c/0x5c
|  dump_stack_lvl+0x88/0xb4
|  dump_stack+0x1c/0x38
|  __might_resched+0x180/0x230
|  __might_sleep+0x4c/0xa0
|  __mutex_lock+0x5c/0x450
|  mutex_lock_nested+0x30/0x40
|  create_kpti_ng_temp_pgd+0x4fc/0x6d0
|  kpti_install_ng_mappings+0x2b8/0x3b0
|  cpu_enable_non_boot_scope_capabilities+0x7c/0xd0
|  multi_cpu_stop+0xa0/0x18c
|  cpu_stopper_thread+0x88/0x11c
|  smpboot_thread_fn+0x1ec/0x290
|  kthread+0x118/0x120
|  ret_from_fork+0x10/0x20

Since commit:

  ee017ee353506fce ("arm64/mm: avoid fixmap race condition when create pud mapping")

... once the kernel leave the SYSTEM_BOOTING state, the fixmap pagetable
entries are protected by the fixmap_lock mutex.

The new KPTI rewrite code uses __create_pgd_mapping() to create a
temporary pagetable. This happens in atomic context, after secondary
CPUs are brought up and the kernel has left the SYSTEM_BOOTING state.
Hence we try to acquire a mutex in atomic context, which is generally
unsound (though benign in this case as the mutex should be free and all
other CPUs are quiescent).

This patch avoids the issue by pulling the mutex out of alloc_init_pud()
and calling it at a higher level in the pagetable manipulation code.
This allows it to be used without locking where one CPU is known to be
in exclusive control of the machine, even after having left the
SYSTEM_BOOTING state.

Fixes: 47546a1912fc ("arm64: mm: install KPTI nG mappings with MMU enabled")
Signed-off-by: Mark Rutland &lt;mark.rutland@arm.com&gt;
Cc: Ard Biesheuvel &lt;ardb@kernel.org&gt;
Cc: Catalin Marinas &lt;catalin.marinas@arm.com&gt;
Cc: Will Deacon &lt;will@kernel.org&gt;
Reviewed-by: Ard Biesheuvel &lt;ardb@kernel.org&gt;
Link: https://lore.kernel.org/r/20220920134731.1625740-1-mark.rutland@arm.com
Signed-off-by: Will Deacon &lt;will@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Since commit:

  47546a1912fc4a03 ("arm64: mm: install KPTI nG mappings with MMU enabled)"

... when building with CONFIG_DEBUG_ATOMIC_SLEEP=y and booting under
QEMU TCG with '-cpu max', there's a boot-time splat:

| BUG: sleeping function called from invalid context at kernel/locking/mutex.c:580
| in_atomic(): 1, irqs_disabled(): 128, non_block: 0, pid: 15, name: migration/0
| preempt_count: 1, expected: 0
| RCU nest depth: 0, expected: 0
| no locks held by migration/0/15.
| irq event stamp: 28
| hardirqs last  enabled at (27): [&lt;ffff8000091ed180&gt;] _raw_spin_unlock_irq+0x3c/0x7c
| hardirqs last disabled at (28): [&lt;ffff8000081b8d74&gt;] multi_cpu_stop+0x150/0x18c
| softirqs last  enabled at (0): [&lt;ffff80000809a314&gt;] copy_process+0x594/0x1964
| softirqs last disabled at (0): [&lt;0000000000000000&gt;] 0x0
| CPU: 0 PID: 15 Comm: migration/0 Not tainted 6.0.0-rc3-00002-g419b42ff7eef #3
| Hardware name: linux,dummy-virt (DT)
| Stopper: multi_cpu_stop+0x0/0x18c &lt;- stop_cpus.constprop.0+0xa0/0xfc
| Call trace:
|  dump_backtrace.part.0+0xd0/0xe0
|  show_stack+0x1c/0x5c
|  dump_stack_lvl+0x88/0xb4
|  dump_stack+0x1c/0x38
|  __might_resched+0x180/0x230
|  __might_sleep+0x4c/0xa0
|  __mutex_lock+0x5c/0x450
|  mutex_lock_nested+0x30/0x40
|  create_kpti_ng_temp_pgd+0x4fc/0x6d0
|  kpti_install_ng_mappings+0x2b8/0x3b0
|  cpu_enable_non_boot_scope_capabilities+0x7c/0xd0
|  multi_cpu_stop+0xa0/0x18c
|  cpu_stopper_thread+0x88/0x11c
|  smpboot_thread_fn+0x1ec/0x290
|  kthread+0x118/0x120
|  ret_from_fork+0x10/0x20

Since commit:

  ee017ee353506fce ("arm64/mm: avoid fixmap race condition when create pud mapping")

... once the kernel leave the SYSTEM_BOOTING state, the fixmap pagetable
entries are protected by the fixmap_lock mutex.

The new KPTI rewrite code uses __create_pgd_mapping() to create a
temporary pagetable. This happens in atomic context, after secondary
CPUs are brought up and the kernel has left the SYSTEM_BOOTING state.
Hence we try to acquire a mutex in atomic context, which is generally
unsound (though benign in this case as the mutex should be free and all
other CPUs are quiescent).

This patch avoids the issue by pulling the mutex out of alloc_init_pud()
and calling it at a higher level in the pagetable manipulation code.
This allows it to be used without locking where one CPU is known to be
in exclusive control of the machine, even after having left the
SYSTEM_BOOTING state.

Fixes: 47546a1912fc ("arm64: mm: install KPTI nG mappings with MMU enabled")
Signed-off-by: Mark Rutland &lt;mark.rutland@arm.com&gt;
Cc: Ard Biesheuvel &lt;ardb@kernel.org&gt;
Cc: Catalin Marinas &lt;catalin.marinas@arm.com&gt;
Cc: Will Deacon &lt;will@kernel.org&gt;
Reviewed-by: Ard Biesheuvel &lt;ardb@kernel.org&gt;
Link: https://lore.kernel.org/r/20220920134731.1625740-1-mark.rutland@arm.com
Signed-off-by: Will Deacon &lt;will@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>KVM: arm64: Use kmemleak_free_part_phys() to unregister hyp_mem_base</title>
<updated>2022-09-19T16:59:48+00:00</updated>
<author>
<name>Zenghui Yu</name>
<email>yuzenghui@huawei.com</email>
</author>
<published>2022-09-08T13:06:59+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=522c9a64c7049f50c7b1299741c13fac3f231cd4'/>
<id>522c9a64c7049f50c7b1299741c13fac3f231cd4</id>
<content type='text'>
With commit 0c24e061196c ("mm: kmemleak: add rbtree and store physical
address for objects allocated with PA"), kmemleak started to put the
objects allocated with physical address onto object_phys_tree_root tree.
The kmemleak_free_part() therefore no longer worked as expected on
physically allocated objects (hyp_mem_base in this case) as it attempted to
search and remove things in object_tree_root tree.

Fix it by using kmemleak_free_part_phys() to unregister hyp_mem_base. This
fixes an immediate crash when booting a KVM host in protected mode with
kmemleak enabled.

Signed-off-by: Zenghui Yu &lt;yuzenghui@huawei.com&gt;
Acked-by: Catalin Marinas &lt;catalin.marinas@arm.com&gt;
Reviewed-by: Oliver Upton &lt;oliver.upton@linux.dev&gt;
Signed-off-by: Marc Zyngier &lt;maz@kernel.org&gt;
Link: https://lore.kernel.org/r/20220908130659.2021-1-yuzenghui@huawei.com
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
With commit 0c24e061196c ("mm: kmemleak: add rbtree and store physical
address for objects allocated with PA"), kmemleak started to put the
objects allocated with physical address onto object_phys_tree_root tree.
The kmemleak_free_part() therefore no longer worked as expected on
physically allocated objects (hyp_mem_base in this case) as it attempted to
search and remove things in object_tree_root tree.

Fix it by using kmemleak_free_part_phys() to unregister hyp_mem_base. This
fixes an immediate crash when booting a KVM host in protected mode with
kmemleak enabled.

Signed-off-by: Zenghui Yu &lt;yuzenghui@huawei.com&gt;
Acked-by: Catalin Marinas &lt;catalin.marinas@arm.com&gt;
Reviewed-by: Oliver Upton &lt;oliver.upton@linux.dev&gt;
Signed-off-by: Marc Zyngier &lt;maz@kernel.org&gt;
Link: https://lore.kernel.org/r/20220908130659.2021-1-yuzenghui@huawei.com
</pre>
</div>
</content>
</entry>
</feed>
