I'm announcing the release of the 5.15.28 kernel. All users of the 5.15 kernel series must upgrade. The updated 5.15.y git tree can be found at: git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git linux-5.15.y and can be browsed at the normal kernel.org git web browser: https://git.kernel.org/?p=linux/kernel/git/stable/linux-stable.git;a=summary thanks, greg k-h ------------ Documentation/admin-guide/hw-vuln/spectre.rst | 48 +- Documentation/admin-guide/kernel-parameters.txt | 8 Documentation/arm64/cpu-feature-registers.rst | 29 + Documentation/arm64/elf_hwcaps.rst | 12 Makefile | 2 arch/arm/include/asm/assembler.h | 10 arch/arm/include/asm/spectre.h | 32 + arch/arm/include/asm/vmlinux.lds.h | 43 ++ arch/arm/kernel/Makefile | 2 arch/arm/kernel/entry-armv.S | 79 ++++ arch/arm/kernel/entry-common.S | 24 + arch/arm/kernel/spectre.c | 71 ++++ arch/arm/kernel/traps.c | 65 +++ arch/arm/mm/Kconfig | 11 arch/arm/mm/proc-v7-bugs.c | 208 ++++++++++-- arch/arm64/Kconfig | 9 arch/arm64/include/asm/assembler.h | 53 +++ arch/arm64/include/asm/cpu.h | 1 arch/arm64/include/asm/cpufeature.h | 29 + arch/arm64/include/asm/cputype.h | 14 arch/arm64/include/asm/fixmap.h | 6 arch/arm64/include/asm/hwcap.h | 3 arch/arm64/include/asm/insn.h | 1 arch/arm64/include/asm/kvm_host.h | 5 arch/arm64/include/asm/rwonce.h | 4 arch/arm64/include/asm/sections.h | 5 arch/arm64/include/asm/spectre.h | 4 arch/arm64/include/asm/sysreg.h | 18 + arch/arm64/include/asm/vectors.h | 73 ++++ arch/arm64/include/uapi/asm/hwcap.h | 3 arch/arm64/include/uapi/asm/kvm.h | 5 arch/arm64/kernel/cpu_errata.c | 7 arch/arm64/kernel/cpufeature.c | 28 + arch/arm64/kernel/cpuinfo.c | 4 arch/arm64/kernel/entry.S | 214 +++++++++---- arch/arm64/kernel/image-vars.h | 4 arch/arm64/kernel/proton-pack.c | 391 +++++++++++++++++++++++- arch/arm64/kernel/vmlinux.lds.S | 2 arch/arm64/kvm/arm.c | 5 arch/arm64/kvm/hyp/hyp-entry.S | 9 arch/arm64/kvm/hyp/nvhe/mm.c | 4 arch/arm64/kvm/hyp/vhe/switch.c | 9 arch/arm64/kvm/hypercalls.c | 12 arch/arm64/kvm/psci.c | 18 + arch/arm64/kvm/sys_regs.c | 2 arch/arm64/mm/mmu.c | 12 arch/arm64/tools/cpucaps | 1 arch/x86/include/asm/cpufeatures.h | 2 arch/x86/include/asm/nospec-branch.h | 16 arch/x86/kernel/cpu/bugs.c | 205 +++++++++--- arch/x86/lib/retpoline.S | 2 drivers/acpi/ec.c | 10 drivers/acpi/sleep.c | 14 drivers/block/xen-blkfront.c | 63 ++- drivers/net/slip/slip.h | 2 drivers/net/xen-netfront.c | 54 ++- drivers/scsi/xen-scsifront.c | 3 drivers/xen/gntalloc.c | 25 - drivers/xen/grant-table.c | 71 ++-- drivers/xen/pvcalls-front.c | 8 drivers/xen/xenbus/xenbus_client.c | 24 - include/linux/arm-smccc.h | 5 include/linux/bpf.h | 12 include/xen/grant_table.h | 19 + kernel/sysctl.c | 7 net/9p/trans_xen.c | 14 tools/arch/x86/include/asm/cpufeatures.h | 2 67 files changed, 1799 insertions(+), 358 deletions(-) Anshuman Khandual (1): arm64: Add Cortex-X2 CPU part definition Emmanuel Gil Peyrot (1): ARM: fix build error when BPF_SYSCALL is disabled Greg Kroah-Hartman (2): Revert "ACPI: PM: s2idle: Cancel wakeup before dispatching EC GPE" Linux 5.15.28 Huang Pei (1): slip: fix macro redefine warning James Morse (20): arm64: entry.S: Add ventry overflow sanity checks arm64: spectre: Rename spectre_v4_patch_fw_mitigation_conduit KVM: arm64: Allow indirect vectors to be used without SPECTRE_V3A arm64: entry: Make the trampoline cleanup optional arm64: entry: Free up another register on kpti's tramp_exit path arm64: entry: Move the trampoline data page before the text page arm64: entry: Allow tramp_alias to access symbols after the 4K boundary arm64: entry: Don't assume tramp_vectors is the start of the vectors arm64: entry: Move trampoline macros out of ifdef'd section arm64: entry: Make the kpti trampoline's kpti sequence optional arm64: entry: Allow the trampoline text to occupy multiple pages arm64: entry: Add non-kpti __bp_harden_el1_vectors for mitigations arm64: entry: Add vectors that have the bhb mitigation sequences arm64: entry: Add macro for reading symbol addresses from the trampoline arm64: Add percpu vectors for EL1 arm64: proton-pack: Report Spectre-BHB vulnerabilities as part of Spectre-v2 arm64: Mitigate spectre style branch history side channels KVM: arm64: Allow SMCCC_ARCH_WORKAROUND_3 to be discovered and migrated arm64: Use the clearbhb instruction in mitigations arm64: proton-pack: Include unprivileged eBPF status in Spectre v2 mitigation reporting Joey Gouly (3): arm64: add ID_AA64ISAR2_EL1 sys register arm64: cpufeature: add HWCAP for FEAT_AFP arm64: cpufeature: add HWCAP for FEAT_RPRES Josh Poimboeuf (3): x86/speculation: Include unprivileged eBPF status in Spectre v2 mitigation reporting x86/speculation: Warn about Spectre v2 LFENCE mitigation x86/speculation: Warn about eIBRS + LFENCE + Unprivileged eBPF + SMT Juergen Gross (11): xen/xenbus: don't let xenbus_grant_ring() remove grants in error case xen/grant-table: add gnttab_try_end_foreign_access() xen/blkfront: don't use gnttab_query_foreign_access() for mapped status xen/netfront: don't use gnttab_query_foreign_access() for mapped status xen/scsifront: don't use gnttab_query_foreign_access() for mapped status xen/gntalloc: don't use gnttab_query_foreign_access() xen: remove gnttab_query_foreign_access() xen/9p: use alloc/free_pages_exact() xen/pvcalls: use alloc/free_pages_exact() xen/gnttab: fix gnttab_end_foreign_access() without page specified xen/netfront: react properly to failing gnttab_end_foreign_access_ref() Kim Phillips (2): x86/speculation: Use generic retpoline by default on AMD x86/speculation: Update link to AMD speculation whitepaper Marc Zyngier (1): arm64: Add HWCAP for self-synchronising virtual counter Nathan Chancellor (2): ARM: Do not use NOCROSSREFS directive with ld.lld arm64: Do not include __READ_ONCE() block in assembly files Peter Zijlstra (3): x86,bugs: Unconditionally allow spectre_v2=retpoline,amd x86/speculation: Add eIBRS + Retpoline options Documentation/hw-vuln: Update spectre doc Peter Zijlstra (Intel) (1): x86/speculation: Rename RETPOLINE_AMD to RETPOLINE_LFENCE Russell King (Oracle) (7): ARM: report Spectre v2 status through sysfs ARM: early traps initialisation ARM: use LOADADDR() to get load address of sections ARM: Spectre-BHB workaround ARM: include unprivileged BPF status in Spectre V2 reporting ARM: fix co-processor register typo ARM: fix build warning in proc-v7-bugs.c Suzuki K Poulose (1): arm64: Add Neoverse-N2, Cortex-A710 CPU part definition
