| Message ID | 20241111083544.1845845-8-ardb+git@google.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | arm64: Clean up and simplify PA space size handling | expand |
(cc Quentin) On Mon, 11 Nov 2024 at 09:35, Ard Biesheuvel <ardb+git@google.com> wrote: > > From: Ard Biesheuvel <ardb@kernel.org> > > This series addresses a number of buglets related to how we handle the > size of the physical address space when building LPA2 capable kernels: > > - reject 52-bit physical addressess in the mapping routines when LPA2 is > configured but not available at runtime > - ensure that TCR.IPS is not set to 52-bits if LPA2 is not supported > - ensure that TCR_EL2.PS and DS match the host, regardless of whether > LPA2 is available at stage 2 > - don't rely on kvm_get_parange() and invalid physical addresses as > control flags in the pKVM page donation APIs > > Finally, the configurable 48-bit physical address space limit is dropped > entirely, as it doesn't buy us a lot now that all the PARange and {I}PS > handling is done at runtime. > > Cc: Catalin Marinas <catalin.marinas@arm.com> > Cc: Will Deacon <will@kernel.org> > Cc: Marc Zyngier <maz@kernel.org> > Cc: Mark Rutland <mark.rutland@arm.com> > Cc: Ryan Roberts <ryan.roberts@arm.com> > Cc: Anshuman Khandual <anshuman.khandual@arm.com> > Cc: Kees Cook <keescook@chromium.org> > > Ard Biesheuvel (6): > arm64/mm: Reduce PA space to 48 bits when LPA2 is not enabled > arm64/mm: Override PARange for !LPA2 and use it consistently > arm64/kvm: Configure HYP TCR.PS/DS based on host stage1 > arm64/kvm: Avoid invalid physical addresses to signal owner updates > arm64: Kconfig: force ARM64_PAN=y when enabling TTBR0 sw PAN > arm64/mm: Drop configurable 48-bit physical address space limit > > arch/arm64/Kconfig | 37 ++------------------ > arch/arm64/include/asm/assembler.h | 14 +++----- > arch/arm64/include/asm/cpufeature.h | 3 +- > arch/arm64/include/asm/kvm_pgtable.h | 3 +- > arch/arm64/include/asm/pgtable-hwdef.h | 12 +------ > arch/arm64/include/asm/pgtable-prot.h | 7 ++++ > arch/arm64/include/asm/pgtable.h | 11 +----- > arch/arm64/include/asm/sparsemem.h | 4 ++- > arch/arm64/include/asm/sysreg.h | 6 ---- > arch/arm64/kernel/cpufeature.c | 2 +- > arch/arm64/kernel/pi/idreg-override.c | 9 +++++ > arch/arm64/kernel/pi/map_kernel.c | 6 ++++ > arch/arm64/kvm/arm.c | 8 ++--- > arch/arm64/kvm/hyp/pgtable.c | 37 ++++++++------------ > arch/arm64/mm/init.c | 2 +- > arch/arm64/mm/pgd.c | 9 ++--- > arch/arm64/mm/proc.S | 2 -- > scripts/gdb/linux/constants.py.in | 1 - > tools/arch/arm64/include/asm/sysreg.h | 6 ---- > 19 files changed, 62 insertions(+), 117 deletions(-) > > -- > 2.47.0.277.g8800431eea-goog >
From: Ard Biesheuvel <ardb@kernel.org> This series addresses a number of buglets related to how we handle the size of the physical address space when building LPA2 capable kernels: - reject 52-bit physical addressess in the mapping routines when LPA2 is configured but not available at runtime - ensure that TCR.IPS is not set to 52-bits if LPA2 is not supported - ensure that TCR_EL2.PS and DS match the host, regardless of whether LPA2 is available at stage 2 - don't rely on kvm_get_parange() and invalid physical addresses as control flags in the pKVM page donation APIs Finally, the configurable 48-bit physical address space limit is dropped entirely, as it doesn't buy us a lot now that all the PARange and {I}PS handling is done at runtime. Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will@kernel.org> Cc: Marc Zyngier <maz@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Ryan Roberts <ryan.roberts@arm.com> Cc: Anshuman Khandual <anshuman.khandual@arm.com> Cc: Kees Cook <keescook@chromium.org> Ard Biesheuvel (6): arm64/mm: Reduce PA space to 48 bits when LPA2 is not enabled arm64/mm: Override PARange for !LPA2 and use it consistently arm64/kvm: Configure HYP TCR.PS/DS based on host stage1 arm64/kvm: Avoid invalid physical addresses to signal owner updates arm64: Kconfig: force ARM64_PAN=y when enabling TTBR0 sw PAN arm64/mm: Drop configurable 48-bit physical address space limit arch/arm64/Kconfig | 37 ++------------------ arch/arm64/include/asm/assembler.h | 14 +++----- arch/arm64/include/asm/cpufeature.h | 3 +- arch/arm64/include/asm/kvm_pgtable.h | 3 +- arch/arm64/include/asm/pgtable-hwdef.h | 12 +------ arch/arm64/include/asm/pgtable-prot.h | 7 ++++ arch/arm64/include/asm/pgtable.h | 11 +----- arch/arm64/include/asm/sparsemem.h | 4 ++- arch/arm64/include/asm/sysreg.h | 6 ---- arch/arm64/kernel/cpufeature.c | 2 +- arch/arm64/kernel/pi/idreg-override.c | 9 +++++ arch/arm64/kernel/pi/map_kernel.c | 6 ++++ arch/arm64/kvm/arm.c | 8 ++--- arch/arm64/kvm/hyp/pgtable.c | 37 ++++++++------------ arch/arm64/mm/init.c | 2 +- arch/arm64/mm/pgd.c | 9 ++--- arch/arm64/mm/proc.S | 2 -- scripts/gdb/linux/constants.py.in | 1 - tools/arch/arm64/include/asm/sysreg.h | 6 ---- 19 files changed, 62 insertions(+), 117 deletions(-)