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linux-brain/arch/arm/kvm/hyp/Makefile

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ARM: KVM: Add TLB invalidation code Convert the TLB invalidation code to C, hooking it into the build system whilst we're at it. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2016-01-03 00:09:54 +09:00
#
# Makefile for Kernel-based Virtual Machine module, HYP part
#
arm/arm64: kvm: Disable branch profiling in HYP code commit f9b269f3098121b5d54aaf822e0898c8ed1d3fec upstream. When HYP code runs into branch profiling code, it attempts to jump to unmapped memory, causing a HYP Panic. Disable the branch profiling for code designed to run at HYP mode. Signed-off-by: Julien Thierry <julien.thierry@arm.com> Acked-by: Marc Zyngier <marc.zyngier@arm.com> Cc: Christoffer Dall <christoffer.dall@linaro.org> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Russell King <linux@armlinux.org.uk> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-10-20 20:34:17 +09:00
ccflags-y += -fno-stack-protector -DDISABLE_BRANCH_PROFILING
arm: KVM: Do not use stack-protector to compile HYP code commit 501ad27c67ed0b90df465f23d33e9aed64058a47 upstream. We like living dangerously. Nothing explicitely forbids stack-protector to be used in the HYP code, while distributions routinely compile their kernel with it. We're just lucky that no code actually triggers the instrumentation. Let's not try our luck for much longer, and disable stack-protector for code living at HYP. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Acked-by: Christoffer Dall <cdall@linaro.org> Signed-off-by: Christoffer Dall <cdall@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-05-02 22:30:38 +09:00
ARM: KVM: Use common version of vgic-v2-sr.c No need to keep our own private version, the common one is strictly identical. Acked-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2016-01-28 23:33:05 +09:00
KVM=../../../../virt/kvm
ARM: kvm: fix building with gcc-8 commit 67870eb1204223598ea6d8a4467b482e9f5875b5 upstream. In banked-sr.c, we use a top-level '__asm__(".arch_extension virt")' statement to allow compilation of a multi-CPU kernel for ARMv6 and older ARMv7-A that don't normally support access to the banked registers. This is considered to be a programming error by the gcc developers and will no longer work in gcc-8, where we now get a build error: /tmp/cc4Qy7GR.s:34: Error: Banked registers are not available with this architecture. -- `mrs r3,SP_usr' /tmp/cc4Qy7GR.s:41: Error: Banked registers are not available with this architecture. -- `mrs r3,ELR_hyp' /tmp/cc4Qy7GR.s:55: Error: Banked registers are not available with this architecture. -- `mrs r3,SP_svc' /tmp/cc4Qy7GR.s:62: Error: Banked registers are not available with this architecture. -- `mrs r3,LR_svc' /tmp/cc4Qy7GR.s:69: Error: Banked registers are not available with this architecture. -- `mrs r3,SPSR_svc' /tmp/cc4Qy7GR.s:76: Error: Banked registers are not available with this architecture. -- `mrs r3,SP_abt' Passign the '-march-armv7ve' flag to gcc works, and is ok here, because we know the functions won't ever be called on pre-ARMv7VE machines. Unfortunately, older compiler versions (4.8 and earlier) do not understand that flag, so we still need to keep the asm around. Backporting to stable kernels (4.6+) is needed to allow those to be built with future compilers as well. Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84129 Fixes: 33280b4cd1dc ("ARM: KVM: Add banked registers save/restore") Cc: stable@vger.kernel.org Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-02-03 00:07:34 +09:00
CFLAGS_ARMV7VE :=$(call cc-option, -march=armv7ve)
ARM: KVM: Use common version of vgic-v2-sr.c No need to keep our own private version, the common one is strictly identical. Acked-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2016-01-28 23:33:05 +09:00
obj-$(CONFIG_KVM_ARM_HOST) += $(KVM)/arm/hyp/vgic-v2-sr.o
ARM: KVM: Support vgic-v3 This patch allows to build and use vgic-v3 in 32-bit mode. Unfortunately, it can not be split in several steps without extra stubs to keep patches independent and bisectable. For instance, virt/kvm/arm/vgic/vgic-v3.c uses function from vgic-v3-sr.c, handling access to GICv3 cpu interface from the guest requires vgic_v3.vgic_sre to be already defined. It is how support has been done: * handle SGI requests from the guest * report configured SRE on access to GICv3 cpu interface from the guest * required vgic-v3 macros are provided via uapi.h * static keys are used to select GIC backend * to make vgic-v3 build KVM_ARM_VGIC_V3 guard is removed along with the static inlines Acked-by: Marc Zyngier <marc.zyngier@arm.com> Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
2016-09-12 23:49:24 +09:00
obj-$(CONFIG_KVM_ARM_HOST) += $(KVM)/arm/hyp/vgic-v3-sr.o
ARM: KVM: Use common version of timer-sr.c Using the common HYP timer code is a bit more tricky, since we use system register names. Nothing a set of macros cannot work around... Acked-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2016-01-28 23:48:42 +09:00
obj-$(CONFIG_KVM_ARM_HOST) += $(KVM)/arm/hyp/timer-sr.o
ARM: KVM: Use common version of vgic-v2-sr.c No need to keep our own private version, the common one is strictly identical. Acked-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2016-01-28 23:33:05 +09:00
ARM: KVM: Add TLB invalidation code Convert the TLB invalidation code to C, hooking it into the build system whilst we're at it. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2016-01-03 00:09:54 +09:00
obj-$(CONFIG_KVM_ARM_HOST) += tlb.o
ARM: KVM: Add CP15 save/restore code Concert the CP15 save/restore code to C. Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2016-01-03 21:55:01 +09:00
obj-$(CONFIG_KVM_ARM_HOST) += cp15-sr.o
ARM: KVM: Add VFP save/restore This is almost a copy/paste of the existing version, with a couple of subtle differences: - Only write to FPEXC once on the save path - Add an isb when enabling VFP access The patch also defines a few sysreg accessors and a __vfp_enabled predicate that test the VFP trapping state. Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2016-01-05 00:41:51 +09:00
obj-$(CONFIG_KVM_ARM_HOST) += vfp.o
ARM: KVM: Add banked registers save/restore Banked registers are one of the many perks of the 32bit architecture, and the world switch needs to cope with it. This requires some "special" accessors, as these are not accessed using a standard coprocessor instruction. Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2016-01-06 03:38:09 +09:00
obj-$(CONFIG_KVM_ARM_HOST) += banked-sr.o
ARM: kvm: fix building with gcc-8 commit 67870eb1204223598ea6d8a4467b482e9f5875b5 upstream. In banked-sr.c, we use a top-level '__asm__(".arch_extension virt")' statement to allow compilation of a multi-CPU kernel for ARMv6 and older ARMv7-A that don't normally support access to the banked registers. This is considered to be a programming error by the gcc developers and will no longer work in gcc-8, where we now get a build error: /tmp/cc4Qy7GR.s:34: Error: Banked registers are not available with this architecture. -- `mrs r3,SP_usr' /tmp/cc4Qy7GR.s:41: Error: Banked registers are not available with this architecture. -- `mrs r3,ELR_hyp' /tmp/cc4Qy7GR.s:55: Error: Banked registers are not available with this architecture. -- `mrs r3,SP_svc' /tmp/cc4Qy7GR.s:62: Error: Banked registers are not available with this architecture. -- `mrs r3,LR_svc' /tmp/cc4Qy7GR.s:69: Error: Banked registers are not available with this architecture. -- `mrs r3,SPSR_svc' /tmp/cc4Qy7GR.s:76: Error: Banked registers are not available with this architecture. -- `mrs r3,SP_abt' Passign the '-march-armv7ve' flag to gcc works, and is ok here, because we know the functions won't ever be called on pre-ARMv7VE machines. Unfortunately, older compiler versions (4.8 and earlier) do not understand that flag, so we still need to keep the asm around. Backporting to stable kernels (4.6+) is needed to allow those to be built with future compilers as well. Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84129 Fixes: 33280b4cd1dc ("ARM: KVM: Add banked registers save/restore") Cc: stable@vger.kernel.org Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-02-03 00:07:34 +09:00
CFLAGS_banked-sr.o += $(CFLAGS_ARMV7VE)
ARM: KVM: Add guest entry code Add the very minimal piece of code that is now required to jump into the guest (and return from it). This code is only concerned with save/restoring the USR registers (r0-r12+lr for the guest, r4-r12+lr for the host), as everything else is dealt with in C (VFP is another matter though). Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2016-01-06 03:40:51 +09:00
obj-$(CONFIG_KVM_ARM_HOST) += entry.o
ARM: KVM: Add HYP mode entry code This part is almost entierely borrowed from the existing code, just slightly simplifying the HYP function call (as we now save SPSR_hyp in the world switch). Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2016-01-06 03:43:18 +09:00
obj-$(CONFIG_KVM_ARM_HOST) += hyp-entry.o
ARM: KVM: Add the new world switch implementation The new world switch implementation is modeled after the arm64 one, calling the various save/restore functions in turn, and having as little state as possible. Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2016-01-06 03:42:49 +09:00
obj-$(CONFIG_KVM_ARM_HOST) += switch.o
ARM: kvm: fix building with gcc-8 commit 67870eb1204223598ea6d8a4467b482e9f5875b5 upstream. In banked-sr.c, we use a top-level '__asm__(".arch_extension virt")' statement to allow compilation of a multi-CPU kernel for ARMv6 and older ARMv7-A that don't normally support access to the banked registers. This is considered to be a programming error by the gcc developers and will no longer work in gcc-8, where we now get a build error: /tmp/cc4Qy7GR.s:34: Error: Banked registers are not available with this architecture. -- `mrs r3,SP_usr' /tmp/cc4Qy7GR.s:41: Error: Banked registers are not available with this architecture. -- `mrs r3,ELR_hyp' /tmp/cc4Qy7GR.s:55: Error: Banked registers are not available with this architecture. -- `mrs r3,SP_svc' /tmp/cc4Qy7GR.s:62: Error: Banked registers are not available with this architecture. -- `mrs r3,LR_svc' /tmp/cc4Qy7GR.s:69: Error: Banked registers are not available with this architecture. -- `mrs r3,SPSR_svc' /tmp/cc4Qy7GR.s:76: Error: Banked registers are not available with this architecture. -- `mrs r3,SP_abt' Passign the '-march-armv7ve' flag to gcc works, and is ok here, because we know the functions won't ever be called on pre-ARMv7VE machines. Unfortunately, older compiler versions (4.8 and earlier) do not understand that flag, so we still need to keep the asm around. Backporting to stable kernels (4.6+) is needed to allow those to be built with future compilers as well. Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84129 Fixes: 33280b4cd1dc ("ARM: KVM: Add banked registers save/restore") Cc: stable@vger.kernel.org Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-02-03 00:07:34 +09:00
CFLAGS_switch.o += $(CFLAGS_ARMV7VE)
ARM: KVM: Switch to C-based stage2 init As we now have hooks to setup VTCR from C code, let's drop the original VTCR setup and reimplement it as part of the HYP code. Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2016-02-02 04:56:31 +09:00
obj-$(CONFIG_KVM_ARM_HOST) += s2-setup.o