| Message ID | 20191004120430.11929-1-ard.biesheuvel@linaro.org (mailing list archive) |
|---|---|
| Headers | show |
| Series | arm64: backport SSBS handling to v4.19-stable | expand |
On Fri, 4 Oct 2019 at 14:04, Ard Biesheuvel <ard.biesheuvel@linaro.org> wrote: > > This is a fairly mechnical backport to v4.19 of the changes needed to support > managing the SSBS state, which controls whether Speculative Store Bypass is > permitted. > > I have included Jeremy's sysfs changes as well, since they are equally > suitable for stable and made for a much cleaner backport, so it made > little sense to handle them separately. > > These patches are presented for review, and are not being cc'ed to the > -stable maintainers just yet. > > Cc: Will Deacon <will@kernel.org> > Cc: Catalin Marinas <catalin.marinas@arm.com> > Cc: Marc Zyngier <maz@kernel.org> > Cc: Mark Rutland <mark.rutland@arm.com> > Cc: Suzuki K Poulose <suzuki.poulose@arm.com> > Cc: Jeremy Linton <jeremy.linton@arm.com> > Cc: Andre Przywara <andre.przywara@arm.com> > If nobody has any objections, I'll send these out to -stable end of today.
On Tue, Oct 08, 2019 at 10:12:14AM +0200, Ard Biesheuvel wrote: > On Fri, 4 Oct 2019 at 14:04, Ard Biesheuvel <ard.biesheuvel@linaro.org> wrote: > > > > This is a fairly mechnical backport to v4.19 of the changes needed to support > > managing the SSBS state, which controls whether Speculative Store Bypass is > > permitted. > > > > I have included Jeremy's sysfs changes as well, since they are equally > > suitable for stable and made for a much cleaner backport, so it made > > little sense to handle them separately. > > > > These patches are presented for review, and are not being cc'ed to the > > -stable maintainers just yet. > > > > Cc: Will Deacon <will@kernel.org> > > Cc: Catalin Marinas <catalin.marinas@arm.com> > > Cc: Marc Zyngier <maz@kernel.org> > > Cc: Mark Rutland <mark.rutland@arm.com> > > Cc: Suzuki K Poulose <suzuki.poulose@arm.com> > > Cc: Jeremy Linton <jeremy.linton@arm.com> > > Cc: Andre Przywara <andre.przywara@arm.com> > > > > If nobody has any objections, I'll send these out to -stable end of today. Other than patch 11, this looks good to me! Mark.
On Tue, 8 Oct 2019 at 17:09, Mark Rutland <mark.rutland@arm.com> wrote: > > On Tue, Oct 08, 2019 at 10:12:14AM +0200, Ard Biesheuvel wrote: > > On Fri, 4 Oct 2019 at 14:04, Ard Biesheuvel <ard.biesheuvel@linaro.org> wrote: > > > > > > This is a fairly mechnical backport to v4.19 of the changes needed to support > > > managing the SSBS state, which controls whether Speculative Store Bypass is > > > permitted. > > > > > > I have included Jeremy's sysfs changes as well, since they are equally > > > suitable for stable and made for a much cleaner backport, so it made > > > little sense to handle them separately. > > > > > > These patches are presented for review, and are not being cc'ed to the > > > -stable maintainers just yet. > > > > > > Cc: Will Deacon <will@kernel.org> > > > Cc: Catalin Marinas <catalin.marinas@arm.com> > > > Cc: Marc Zyngier <maz@kernel.org> > > > Cc: Mark Rutland <mark.rutland@arm.com> > > > Cc: Suzuki K Poulose <suzuki.poulose@arm.com> > > > Cc: Jeremy Linton <jeremy.linton@arm.com> > > > Cc: Andre Przywara <andre.przywara@arm.com> > > > > > > > If nobody has any objections, I'll send these out to -stable end of today. > > Other than patch 11, this looks good to me! > Thanks Mark.
This is a fairly mechnical backport to v4.19 of the changes needed to support managing the SSBS state, which controls whether Speculative Store Bypass is permitted. I have included Jeremy's sysfs changes as well, since they are equally suitable for stable and made for a much cleaner backport, so it made little sense to handle them separately. These patches are presented for review, and are not being cc'ed to the -stable maintainers just yet. Cc: Will Deacon <will@kernel.org> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Marc Zyngier <maz@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Suzuki K Poulose <suzuki.poulose@arm.com> Cc: Jeremy Linton <jeremy.linton@arm.com> Cc: Andre Przywara <andre.przywara@arm.com> Jeremy Linton (6): arm64: add sysfs vulnerability show for meltdown arm64: Provide a command line to disable spectre_v2 mitigation arm64: Always enable spectre-v2 vulnerability detection arm64: Always enable ssb vulnerability detection arm64: add sysfs vulnerability show for spectre-v2 arm64: add sysfs vulnerability show for speculative store bypass Marc Zyngier (2): arm64: Advertise mitigation of Spectre-v2, or lack thereof arm64: Force SSBS on context switch Mark Rutland (1): arm64: fix SSBS sanitization Mian Yousaf Kaukab (2): arm64: Add sysfs vulnerability show for spectre-v1 arm64: enable generic CPU vulnerabilites support Will Deacon (5): arm64: cpufeature: Detect SSBS and advertise to userspace arm64: ssbd: Add support for PSTATE.SSBS rather than trapping to EL3 KVM: arm64: Set SCTLR_EL2.DSSBS if SSBD is forcefully disabled and !vhe arm64: docs: Document SSBS HWCAP arm64: ssbs: Don't treat CPUs with SSBS as unaffected by SSB Documentation/admin-guide/kernel-parameters.txt | 8 +- Documentation/arm64/elf_hwcaps.txt | 4 + arch/arm64/Kconfig | 1 + arch/arm64/include/asm/cpucaps.h | 3 +- arch/arm64/include/asm/cpufeature.h | 4 - arch/arm64/include/asm/kvm_host.h | 11 + arch/arm64/include/asm/processor.h | 17 ++ arch/arm64/include/asm/ptrace.h | 1 + arch/arm64/include/asm/sysreg.h | 19 +- arch/arm64/include/uapi/asm/hwcap.h | 1 + arch/arm64/include/uapi/asm/ptrace.h | 1 + arch/arm64/kernel/cpu_errata.c | 257 +++++++++++++------- arch/arm64/kernel/cpufeature.c | 122 ++++++++-- arch/arm64/kernel/cpuinfo.c | 1 + arch/arm64/kernel/process.c | 31 +++ arch/arm64/kernel/ptrace.c | 15 +- arch/arm64/kernel/ssbd.c | 21 ++ arch/arm64/kvm/hyp/sysreg-sr.c | 11 + 18 files changed, 407 insertions(+), 121 deletions(-)