From: Christoffer Dall <christoffer.dall@linaro.org> To: kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org Cc: kvm@vger.kernel.org, Marc Zyngier <marc.zyngier@arm.com>, Shih-Wei Li <shihwei@cs.columbia.edu>, Andrew Jones <drjones@redhat.com>, Christoffer Dall <christoffer.dall@linaro.org>, Ard Biesheuvel <ard.biesheuvel@linaro.org> Subject: [PATCH v3 03/41] KVM: arm64: Avoid storing the vcpu pointer on the stack Date: Fri, 12 Jan 2018 13:07:09 +0100 [thread overview] Message-ID: <20180112120747.27999-4-christoffer.dall@linaro.org> (raw) In-Reply-To: <20180112120747.27999-1-christoffer.dall@linaro.org> We already have the percpu area for the host cpu state, which points to the VCPU, so there's no need to store the VCPU pointer on the stack on every context switch. We can be a little more clever and just use tpidr_el2 for the percpu offset and load the VCPU pointer from the host context. This does require us to calculate the percpu offset without including the offset from the kernel mapping of the percpu array to the linear mapping of the array (which is what we store in tpidr_el1), because a PC-relative generated address in EL2 is already giving us the hyp alias of the linear mapping of a kernel address. We do this in __cpu_init_hyp_mode() by using kvm_ksym_ref(). This change also requires us to have a scratch register, so we take the chance to rearrange some of the el1_sync code to only look at the vttbr_el2 to determine if this is a trap from the guest or an HVC from the host. We do add an extra check to call the panic code if the kernel is configured with debugging enabled and we saw a trap from the host which wasn't an HVC, indicating that we left some EL2 trap configured by mistake. The code that accesses ESR_EL2 was previously using an alternative to use the _EL1 accessor on VHE systems, but this was actually unnecessary as the _EL1 accessor aliases the ESR_EL2 register on VHE, and the _EL2 accessor does the same thing on both systems. Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org> --- arch/arm64/include/asm/kvm_asm.h | 14 +++++++++++++ arch/arm64/include/asm/kvm_host.h | 15 ++++++++++++++ arch/arm64/kernel/asm-offsets.c | 1 + arch/arm64/kvm/hyp/entry.S | 6 +----- arch/arm64/kvm/hyp/hyp-entry.S | 41 ++++++++++++++++++--------------------- arch/arm64/kvm/hyp/switch.c | 5 +---- arch/arm64/kvm/hyp/sysreg-sr.c | 5 +++++ 7 files changed, 56 insertions(+), 31 deletions(-) diff --git a/arch/arm64/include/asm/kvm_asm.h b/arch/arm64/include/asm/kvm_asm.h index ab4d0a926043..6c7599b5cb40 100644 --- a/arch/arm64/include/asm/kvm_asm.h +++ b/arch/arm64/include/asm/kvm_asm.h @@ -33,6 +33,7 @@ #define KVM_ARM64_DEBUG_DIRTY_SHIFT 0 #define KVM_ARM64_DEBUG_DIRTY (1 << KVM_ARM64_DEBUG_DIRTY_SHIFT) +/* Translate a kernel address of @sym into its equivalent linear mapping */ #define kvm_ksym_ref(sym) \ ({ \ void *val = &sym; \ @@ -68,6 +69,19 @@ extern u32 __kvm_get_mdcr_el2(void); extern u32 __init_stage2_translation(void); +#else /* __ASSEMBLY__ */ + +.macro get_host_ctxt reg, tmp + adr_l \reg, kvm_host_cpu_state + mrs \tmp, tpidr_el2 + add \reg, \reg, \tmp +.endm + +.macro get_vcpu vcpu, ctxt + ldr \vcpu, [\ctxt, #HOST_CONTEXT_VCPU] + kern_hyp_va \vcpu +.endm + #endif #endif /* __ARM_KVM_ASM_H__ */ diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 048f5db120f3..6ce0b428a4db 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -350,10 +350,15 @@ int kvm_perf_teardown(void); struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr); +extern void __kvm_set_tpidr_el2(u64 tpidr_el2); +DECLARE_PER_CPU(kvm_cpu_context_t, kvm_host_cpu_state); + static inline void __cpu_init_hyp_mode(phys_addr_t pgd_ptr, unsigned long hyp_stack_ptr, unsigned long vector_ptr) { + u64 tpidr_el2; + /* * Call initialization code, and switch to the full blown HYP code. * If the cpucaps haven't been finalized yet, something has gone very @@ -362,6 +367,16 @@ static inline void __cpu_init_hyp_mode(phys_addr_t pgd_ptr, */ BUG_ON(!static_branch_likely(&arm64_const_caps_ready)); __kvm_call_hyp((void *)pgd_ptr, hyp_stack_ptr, vector_ptr); + + /* + * Calculate the raw per-cpu offset without a translation from the + * kernel's mapping to the linear mapping, and store it in tpidr_el2 + * so that we can use adr_l to access per-cpu variables in EL2. + */ + tpidr_el2 = (u64)this_cpu_ptr(&kvm_host_cpu_state) + - (u64)kvm_ksym_ref(kvm_host_cpu_state); + + kvm_call_hyp(__kvm_set_tpidr_el2, tpidr_el2); } static inline void kvm_arch_hardware_unsetup(void) {} diff --git a/arch/arm64/kernel/asm-offsets.c b/arch/arm64/kernel/asm-offsets.c index 71bf088f1e4b..612021dce84f 100644 --- a/arch/arm64/kernel/asm-offsets.c +++ b/arch/arm64/kernel/asm-offsets.c @@ -135,6 +135,7 @@ int main(void) DEFINE(CPU_FP_REGS, offsetof(struct kvm_regs, fp_regs)); DEFINE(VCPU_FPEXC32_EL2, offsetof(struct kvm_vcpu, arch.ctxt.sys_regs[FPEXC32_EL2])); DEFINE(VCPU_HOST_CONTEXT, offsetof(struct kvm_vcpu, arch.host_cpu_context)); + DEFINE(HOST_CONTEXT_VCPU, offsetof(struct kvm_cpu_context, __hyp_running_vcpu)); #endif #ifdef CONFIG_CPU_PM DEFINE(CPU_SUSPEND_SZ, sizeof(struct cpu_suspend_ctx)); diff --git a/arch/arm64/kvm/hyp/entry.S b/arch/arm64/kvm/hyp/entry.S index 9a8ab5dddd9e..a360ac6e89e9 100644 --- a/arch/arm64/kvm/hyp/entry.S +++ b/arch/arm64/kvm/hyp/entry.S @@ -62,9 +62,6 @@ ENTRY(__guest_enter) // Store the host regs save_callee_saved_regs x1 - // Store host_ctxt and vcpu for use at exit time - stp x1, x0, [sp, #-16]! - add x18, x0, #VCPU_CONTEXT // Restore guest regs x0-x17 @@ -118,8 +115,7 @@ ENTRY(__guest_exit) // Store the guest regs x19-x29, lr save_callee_saved_regs x1 - // Restore the host_ctxt from the stack - ldr x2, [sp], #16 + get_host_ctxt x2, x3 // Now restore the host regs restore_callee_saved_regs x2 diff --git a/arch/arm64/kvm/hyp/hyp-entry.S b/arch/arm64/kvm/hyp/hyp-entry.S index e4f37b9dd47c..71b4cc92895e 100644 --- a/arch/arm64/kvm/hyp/hyp-entry.S +++ b/arch/arm64/kvm/hyp/hyp-entry.S @@ -56,18 +56,15 @@ ENDPROC(__vhe_hyp_call) el1_sync: // Guest trapped into EL2 stp x0, x1, [sp, #-16]! -alternative_if_not ARM64_HAS_VIRT_HOST_EXTN - mrs x1, esr_el2 -alternative_else - mrs x1, esr_el1 -alternative_endif - lsr x0, x1, #ESR_ELx_EC_SHIFT + mrs x1, vttbr_el2 // If vttbr is valid, this is a trap + cbnz x1, el1_trap // from the guest - cmp x0, #ESR_ELx_EC_HVC64 - b.ne el1_trap - - mrs x1, vttbr_el2 // If vttbr is valid, the 64bit guest - cbnz x1, el1_trap // called HVC +#ifdef CONFIG_DEBUG + mrs x0, esr_el2 + lsr x0, x0, #ESR_ELx_EC_SHIFT + cmp x0, #ESR_ELx_EC_HVC64 + b.ne __hyp_panic +#endif /* Here, we're pretty sure the host called HVC. */ ldp x0, x1, [sp], #16 @@ -101,10 +98,15 @@ alternative_endif eret el1_trap: + get_host_ctxt x0, x1 + get_vcpu x1, x0 + + mrs x0, esr_el2 + lsr x0, x0, #ESR_ELx_EC_SHIFT /* * x0: ESR_EC + * x1: vcpu pointer */ - ldr x1, [sp, #16 + 8] // vcpu stored by __guest_enter /* * We trap the first access to the FP/SIMD to save the host context @@ -122,13 +124,15 @@ alternative_else_nop_endif el1_irq: stp x0, x1, [sp, #-16]! - ldr x1, [sp, #16 + 8] + get_host_ctxt x0, x1 + get_vcpu x1, x0 mov x0, #ARM_EXCEPTION_IRQ b __guest_exit el1_error: stp x0, x1, [sp, #-16]! - ldr x1, [sp, #16 + 8] + get_host_ctxt x0, x1 + get_vcpu x1, x0 mov x0, #ARM_EXCEPTION_EL1_SERROR b __guest_exit @@ -164,14 +168,7 @@ ENTRY(__hyp_do_panic) ENDPROC(__hyp_do_panic) ENTRY(__hyp_panic) - /* - * '=kvm_host_cpu_state' is a host VA from the constant pool, it may - * not be accessible by this address from EL2, hyp_panic() converts - * it with kern_hyp_va() before use. - */ - ldr x0, =kvm_host_cpu_state - mrs x1, tpidr_el2 - add x0, x0, x1 + get_host_ctxt x0, x1 b hyp_panic ENDPROC(__hyp_panic) diff --git a/arch/arm64/kvm/hyp/switch.c b/arch/arm64/kvm/hyp/switch.c index f7307b6b42f0..6fcb37e220b5 100644 --- a/arch/arm64/kvm/hyp/switch.c +++ b/arch/arm64/kvm/hyp/switch.c @@ -449,7 +449,7 @@ static hyp_alternate_select(__hyp_call_panic, __hyp_call_panic_nvhe, __hyp_call_panic_vhe, ARM64_HAS_VIRT_HOST_EXTN); -void __hyp_text __noreturn hyp_panic(struct kvm_cpu_context *__host_ctxt) +void __hyp_text __noreturn hyp_panic(struct kvm_cpu_context *host_ctxt) { struct kvm_vcpu *vcpu = NULL; @@ -458,9 +458,6 @@ void __hyp_text __noreturn hyp_panic(struct kvm_cpu_context *__host_ctxt) u64 par = read_sysreg(par_el1); if (read_sysreg(vttbr_el2)) { - struct kvm_cpu_context *host_ctxt; - - host_ctxt = kern_hyp_va(__host_ctxt); vcpu = host_ctxt->__hyp_running_vcpu; __timer_disable_traps(vcpu); __deactivate_traps(vcpu); diff --git a/arch/arm64/kvm/hyp/sysreg-sr.c b/arch/arm64/kvm/hyp/sysreg-sr.c index c54cc2afb92b..e19d89cabf2a 100644 --- a/arch/arm64/kvm/hyp/sysreg-sr.c +++ b/arch/arm64/kvm/hyp/sysreg-sr.c @@ -183,3 +183,8 @@ void __hyp_text __sysreg32_restore_state(struct kvm_vcpu *vcpu) if (vcpu->arch.debug_flags & KVM_ARM64_DEBUG_DIRTY) write_sysreg(sysreg[DBGVCR32_EL2], dbgvcr32_el2); } + +void __hyp_text __kvm_set_tpidr_el2(u64 tpidr_el2) +{ + asm("msr tpidr_el2, %0": : "r" (tpidr_el2)); +} -- 2.14.2
WARNING: multiple messages have this Message-ID (diff)
From: christoffer.dall@linaro.org (Christoffer Dall) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v3 03/41] KVM: arm64: Avoid storing the vcpu pointer on the stack Date: Fri, 12 Jan 2018 13:07:09 +0100 [thread overview] Message-ID: <20180112120747.27999-4-christoffer.dall@linaro.org> (raw) In-Reply-To: <20180112120747.27999-1-christoffer.dall@linaro.org> We already have the percpu area for the host cpu state, which points to the VCPU, so there's no need to store the VCPU pointer on the stack on every context switch. We can be a little more clever and just use tpidr_el2 for the percpu offset and load the VCPU pointer from the host context. This does require us to calculate the percpu offset without including the offset from the kernel mapping of the percpu array to the linear mapping of the array (which is what we store in tpidr_el1), because a PC-relative generated address in EL2 is already giving us the hyp alias of the linear mapping of a kernel address. We do this in __cpu_init_hyp_mode() by using kvm_ksym_ref(). This change also requires us to have a scratch register, so we take the chance to rearrange some of the el1_sync code to only look at the vttbr_el2 to determine if this is a trap from the guest or an HVC from the host. We do add an extra check to call the panic code if the kernel is configured with debugging enabled and we saw a trap from the host which wasn't an HVC, indicating that we left some EL2 trap configured by mistake. The code that accesses ESR_EL2 was previously using an alternative to use the _EL1 accessor on VHE systems, but this was actually unnecessary as the _EL1 accessor aliases the ESR_EL2 register on VHE, and the _EL2 accessor does the same thing on both systems. Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org> --- arch/arm64/include/asm/kvm_asm.h | 14 +++++++++++++ arch/arm64/include/asm/kvm_host.h | 15 ++++++++++++++ arch/arm64/kernel/asm-offsets.c | 1 + arch/arm64/kvm/hyp/entry.S | 6 +----- arch/arm64/kvm/hyp/hyp-entry.S | 41 ++++++++++++++++++--------------------- arch/arm64/kvm/hyp/switch.c | 5 +---- arch/arm64/kvm/hyp/sysreg-sr.c | 5 +++++ 7 files changed, 56 insertions(+), 31 deletions(-) diff --git a/arch/arm64/include/asm/kvm_asm.h b/arch/arm64/include/asm/kvm_asm.h index ab4d0a926043..6c7599b5cb40 100644 --- a/arch/arm64/include/asm/kvm_asm.h +++ b/arch/arm64/include/asm/kvm_asm.h @@ -33,6 +33,7 @@ #define KVM_ARM64_DEBUG_DIRTY_SHIFT 0 #define KVM_ARM64_DEBUG_DIRTY (1 << KVM_ARM64_DEBUG_DIRTY_SHIFT) +/* Translate a kernel address of @sym into its equivalent linear mapping */ #define kvm_ksym_ref(sym) \ ({ \ void *val = &sym; \ @@ -68,6 +69,19 @@ extern u32 __kvm_get_mdcr_el2(void); extern u32 __init_stage2_translation(void); +#else /* __ASSEMBLY__ */ + +.macro get_host_ctxt reg, tmp + adr_l \reg, kvm_host_cpu_state + mrs \tmp, tpidr_el2 + add \reg, \reg, \tmp +.endm + +.macro get_vcpu vcpu, ctxt + ldr \vcpu, [\ctxt, #HOST_CONTEXT_VCPU] + kern_hyp_va \vcpu +.endm + #endif #endif /* __ARM_KVM_ASM_H__ */ diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 048f5db120f3..6ce0b428a4db 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -350,10 +350,15 @@ int kvm_perf_teardown(void); struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr); +extern void __kvm_set_tpidr_el2(u64 tpidr_el2); +DECLARE_PER_CPU(kvm_cpu_context_t, kvm_host_cpu_state); + static inline void __cpu_init_hyp_mode(phys_addr_t pgd_ptr, unsigned long hyp_stack_ptr, unsigned long vector_ptr) { + u64 tpidr_el2; + /* * Call initialization code, and switch to the full blown HYP code. * If the cpucaps haven't been finalized yet, something has gone very @@ -362,6 +367,16 @@ static inline void __cpu_init_hyp_mode(phys_addr_t pgd_ptr, */ BUG_ON(!static_branch_likely(&arm64_const_caps_ready)); __kvm_call_hyp((void *)pgd_ptr, hyp_stack_ptr, vector_ptr); + + /* + * Calculate the raw per-cpu offset without a translation from the + * kernel's mapping to the linear mapping, and store it in tpidr_el2 + * so that we can use adr_l to access per-cpu variables in EL2. + */ + tpidr_el2 = (u64)this_cpu_ptr(&kvm_host_cpu_state) + - (u64)kvm_ksym_ref(kvm_host_cpu_state); + + kvm_call_hyp(__kvm_set_tpidr_el2, tpidr_el2); } static inline void kvm_arch_hardware_unsetup(void) {} diff --git a/arch/arm64/kernel/asm-offsets.c b/arch/arm64/kernel/asm-offsets.c index 71bf088f1e4b..612021dce84f 100644 --- a/arch/arm64/kernel/asm-offsets.c +++ b/arch/arm64/kernel/asm-offsets.c @@ -135,6 +135,7 @@ int main(void) DEFINE(CPU_FP_REGS, offsetof(struct kvm_regs, fp_regs)); DEFINE(VCPU_FPEXC32_EL2, offsetof(struct kvm_vcpu, arch.ctxt.sys_regs[FPEXC32_EL2])); DEFINE(VCPU_HOST_CONTEXT, offsetof(struct kvm_vcpu, arch.host_cpu_context)); + DEFINE(HOST_CONTEXT_VCPU, offsetof(struct kvm_cpu_context, __hyp_running_vcpu)); #endif #ifdef CONFIG_CPU_PM DEFINE(CPU_SUSPEND_SZ, sizeof(struct cpu_suspend_ctx)); diff --git a/arch/arm64/kvm/hyp/entry.S b/arch/arm64/kvm/hyp/entry.S index 9a8ab5dddd9e..a360ac6e89e9 100644 --- a/arch/arm64/kvm/hyp/entry.S +++ b/arch/arm64/kvm/hyp/entry.S @@ -62,9 +62,6 @@ ENTRY(__guest_enter) // Store the host regs save_callee_saved_regs x1 - // Store host_ctxt and vcpu for use@exit time - stp x1, x0, [sp, #-16]! - add x18, x0, #VCPU_CONTEXT // Restore guest regs x0-x17 @@ -118,8 +115,7 @@ ENTRY(__guest_exit) // Store the guest regs x19-x29, lr save_callee_saved_regs x1 - // Restore the host_ctxt from the stack - ldr x2, [sp], #16 + get_host_ctxt x2, x3 // Now restore the host regs restore_callee_saved_regs x2 diff --git a/arch/arm64/kvm/hyp/hyp-entry.S b/arch/arm64/kvm/hyp/hyp-entry.S index e4f37b9dd47c..71b4cc92895e 100644 --- a/arch/arm64/kvm/hyp/hyp-entry.S +++ b/arch/arm64/kvm/hyp/hyp-entry.S @@ -56,18 +56,15 @@ ENDPROC(__vhe_hyp_call) el1_sync: // Guest trapped into EL2 stp x0, x1, [sp, #-16]! -alternative_if_not ARM64_HAS_VIRT_HOST_EXTN - mrs x1, esr_el2 -alternative_else - mrs x1, esr_el1 -alternative_endif - lsr x0, x1, #ESR_ELx_EC_SHIFT + mrs x1, vttbr_el2 // If vttbr is valid, this is a trap + cbnz x1, el1_trap // from the guest - cmp x0, #ESR_ELx_EC_HVC64 - b.ne el1_trap - - mrs x1, vttbr_el2 // If vttbr is valid, the 64bit guest - cbnz x1, el1_trap // called HVC +#ifdef CONFIG_DEBUG + mrs x0, esr_el2 + lsr x0, x0, #ESR_ELx_EC_SHIFT + cmp x0, #ESR_ELx_EC_HVC64 + b.ne __hyp_panic +#endif /* Here, we're pretty sure the host called HVC. */ ldp x0, x1, [sp], #16 @@ -101,10 +98,15 @@ alternative_endif eret el1_trap: + get_host_ctxt x0, x1 + get_vcpu x1, x0 + + mrs x0, esr_el2 + lsr x0, x0, #ESR_ELx_EC_SHIFT /* * x0: ESR_EC + * x1: vcpu pointer */ - ldr x1, [sp, #16 + 8] // vcpu stored by __guest_enter /* * We trap the first access to the FP/SIMD to save the host context @@ -122,13 +124,15 @@ alternative_else_nop_endif el1_irq: stp x0, x1, [sp, #-16]! - ldr x1, [sp, #16 + 8] + get_host_ctxt x0, x1 + get_vcpu x1, x0 mov x0, #ARM_EXCEPTION_IRQ b __guest_exit el1_error: stp x0, x1, [sp, #-16]! - ldr x1, [sp, #16 + 8] + get_host_ctxt x0, x1 + get_vcpu x1, x0 mov x0, #ARM_EXCEPTION_EL1_SERROR b __guest_exit @@ -164,14 +168,7 @@ ENTRY(__hyp_do_panic) ENDPROC(__hyp_do_panic) ENTRY(__hyp_panic) - /* - * '=kvm_host_cpu_state' is a host VA from the constant pool, it may - * not be accessible by this address from EL2, hyp_panic() converts - * it with kern_hyp_va() before use. - */ - ldr x0, =kvm_host_cpu_state - mrs x1, tpidr_el2 - add x0, x0, x1 + get_host_ctxt x0, x1 b hyp_panic ENDPROC(__hyp_panic) diff --git a/arch/arm64/kvm/hyp/switch.c b/arch/arm64/kvm/hyp/switch.c index f7307b6b42f0..6fcb37e220b5 100644 --- a/arch/arm64/kvm/hyp/switch.c +++ b/arch/arm64/kvm/hyp/switch.c @@ -449,7 +449,7 @@ static hyp_alternate_select(__hyp_call_panic, __hyp_call_panic_nvhe, __hyp_call_panic_vhe, ARM64_HAS_VIRT_HOST_EXTN); -void __hyp_text __noreturn hyp_panic(struct kvm_cpu_context *__host_ctxt) +void __hyp_text __noreturn hyp_panic(struct kvm_cpu_context *host_ctxt) { struct kvm_vcpu *vcpu = NULL; @@ -458,9 +458,6 @@ void __hyp_text __noreturn hyp_panic(struct kvm_cpu_context *__host_ctxt) u64 par = read_sysreg(par_el1); if (read_sysreg(vttbr_el2)) { - struct kvm_cpu_context *host_ctxt; - - host_ctxt = kern_hyp_va(__host_ctxt); vcpu = host_ctxt->__hyp_running_vcpu; __timer_disable_traps(vcpu); __deactivate_traps(vcpu); diff --git a/arch/arm64/kvm/hyp/sysreg-sr.c b/arch/arm64/kvm/hyp/sysreg-sr.c index c54cc2afb92b..e19d89cabf2a 100644 --- a/arch/arm64/kvm/hyp/sysreg-sr.c +++ b/arch/arm64/kvm/hyp/sysreg-sr.c @@ -183,3 +183,8 @@ void __hyp_text __sysreg32_restore_state(struct kvm_vcpu *vcpu) if (vcpu->arch.debug_flags & KVM_ARM64_DEBUG_DIRTY) write_sysreg(sysreg[DBGVCR32_EL2], dbgvcr32_el2); } + +void __hyp_text __kvm_set_tpidr_el2(u64 tpidr_el2) +{ + asm("msr tpidr_el2, %0": : "r" (tpidr_el2)); +} -- 2.14.2
next prev parent reply other threads:[~2018-01-12 12:07 UTC|newest] Thread overview: 223+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-01-12 12:07 [PATCH v3 00/41] Optimize KVM/ARM for VHE systems Christoffer Dall 2018-01-12 12:07 ` Christoffer Dall 2018-01-12 12:07 ` [PATCH v3 01/41] KVM: arm/arm64: Avoid vcpu_load for other vcpu ioctls than KVM_RUN Christoffer Dall 2018-01-12 12:07 ` Christoffer Dall 2018-02-05 12:32 ` Julien Grall 2018-02-05 12:32 ` Julien Grall 2018-01-12 12:07 ` [PATCH v3 02/41] KVM: arm/arm64: Move vcpu_load call after kvm_vcpu_first_run_init Christoffer Dall 2018-01-12 12:07 ` Christoffer Dall 2018-02-05 14:34 ` Julien Grall 2018-02-05 14:34 ` Julien Grall 2018-01-12 12:07 ` Christoffer Dall [this message] 2018-01-12 12:07 ` [PATCH v3 03/41] KVM: arm64: Avoid storing the vcpu pointer on the stack Christoffer Dall 2018-02-05 17:14 ` Julien Grall 2018-02-05 17:14 ` Julien Grall 2018-01-12 12:07 ` [PATCH v3 04/41] KVM: arm64: Rework hyp_panic for VHE and non-VHE Christoffer Dall 2018-01-12 12:07 ` Christoffer Dall 2018-02-05 18:04 ` Julien Grall 2018-02-05 18:04 ` Julien Grall 2018-02-05 18:10 ` Julien Grall 2018-02-05 18:10 ` Julien Grall 2018-02-08 13:24 ` Christoffer Dall 2018-02-08 13:24 ` Christoffer Dall 2018-02-09 10:55 ` Julien Grall 2018-02-09 10:55 ` Julien Grall 2018-01-12 12:07 ` [PATCH v3 05/41] KVM: arm64: Move HCR_INT_OVERRIDE to default HCR_EL2 guest flag Christoffer Dall 2018-01-12 12:07 ` Christoffer Dall 2018-02-09 11:38 ` Julien Grall 2018-02-09 11:38 ` Julien Grall 2018-02-13 21:47 ` Christoffer Dall 2018-02-13 21:47 ` Christoffer Dall 2018-01-12 12:07 ` [PATCH v3 06/41] KVM: arm/arm64: Get rid of vcpu->arch.irq_lines Christoffer Dall 2018-01-12 12:07 ` Christoffer Dall 2018-01-12 12:07 ` [PATCH v3 07/41] KVM: arm/arm64: Add kvm_vcpu_load_sysregs and kvm_vcpu_put_sysregs Christoffer Dall 2018-01-12 12:07 ` Christoffer Dall 2018-01-12 12:07 ` [PATCH v3 08/41] KVM: arm/arm64: Introduce vcpu_el1_is_32bit Christoffer Dall 2018-01-12 12:07 ` Christoffer Dall 2018-01-17 14:44 ` Julien Thierry 2018-01-17 14:44 ` Julien Thierry 2018-01-18 12:57 ` Christoffer Dall 2018-01-18 12:57 ` Christoffer Dall 2018-02-09 12:31 ` Julien Grall 2018-02-09 12:31 ` Julien Grall 2018-01-12 12:07 ` [PATCH v3 09/41] KVM: arm64: Defer restoring host VFP state to vcpu_put Christoffer Dall 2018-01-12 12:07 ` Christoffer Dall 2018-01-22 17:33 ` Dave Martin 2018-01-22 17:33 ` Dave Martin 2018-01-25 19:46 ` Christoffer Dall 2018-01-25 19:46 ` Christoffer Dall 2018-02-07 16:49 ` Dave Martin 2018-02-07 16:49 ` Dave Martin 2018-02-07 17:56 ` Christoffer Dall 2018-02-07 17:56 ` Christoffer Dall 2018-02-09 15:59 ` Dave Martin 2018-02-09 15:59 ` Dave Martin 2018-02-13 8:51 ` Christoffer Dall 2018-02-13 8:51 ` Christoffer Dall 2018-02-13 14:08 ` Dave Martin 2018-02-13 14:08 ` Dave Martin 2018-02-14 10:15 ` Christoffer Dall 2018-02-14 10:15 ` Christoffer Dall 2018-02-14 14:43 ` Dave Martin 2018-02-14 14:43 ` Dave Martin 2018-02-14 17:38 ` Christoffer Dall 2018-02-14 17:38 ` Christoffer Dall 2018-02-14 17:43 ` Ard Biesheuvel 2018-02-14 17:43 ` Ard Biesheuvel 2018-02-14 21:08 ` Marc Zyngier 2018-02-14 21:08 ` Marc Zyngier 2018-02-15 9:51 ` Dave Martin 2018-02-15 9:51 ` Dave Martin 2018-02-09 15:26 ` Julien Grall 2018-02-09 15:26 ` Julien Grall 2018-02-13 8:52 ` Christoffer Dall 2018-02-13 8:52 ` Christoffer Dall 2018-01-12 12:07 ` [PATCH v3 10/41] KVM: arm64: Move debug dirty flag calculation out of world switch Christoffer Dall 2018-01-12 12:07 ` Christoffer Dall 2018-01-17 15:11 ` Julien Thierry 2018-01-17 15:11 ` Julien Thierry 2018-01-12 12:07 ` [PATCH v3 11/41] KVM: arm64: Slightly improve debug save/restore functions Christoffer Dall 2018-01-12 12:07 ` Christoffer Dall 2018-01-12 12:07 ` [PATCH v3 12/41] KVM: arm64: Improve debug register save/restore flow Christoffer Dall 2018-01-12 12:07 ` Christoffer Dall 2018-01-12 12:07 ` [PATCH v3 13/41] KVM: arm64: Factor out fault info population and gic workarounds Christoffer Dall 2018-01-12 12:07 ` Christoffer Dall 2018-01-17 15:35 ` Julien Thierry 2018-01-12 12:07 ` [PATCH v3 14/41] KVM: arm64: Introduce VHE-specific kvm_vcpu_run Christoffer Dall 2018-01-12 12:07 ` Christoffer Dall 2018-01-24 16:13 ` Dave Martin 2018-01-24 16:13 ` Dave Martin 2018-01-25 8:45 ` Christoffer Dall 2018-01-25 8:45 ` Christoffer Dall 2018-02-09 17:34 ` Julien Grall 2018-02-09 17:34 ` Julien Grall 2018-02-13 8:52 ` Christoffer Dall 2018-02-13 8:52 ` Christoffer Dall 2018-01-12 12:07 ` [PATCH v3 15/41] KVM: arm64: Remove kern_hyp_va() use in VHE switch function Christoffer Dall 2018-01-12 12:07 ` Christoffer Dall 2018-01-24 16:24 ` Dave Martin 2018-01-24 16:24 ` Dave Martin 2018-01-25 19:48 ` Christoffer Dall 2018-01-25 19:48 ` Christoffer Dall 2018-01-12 12:07 ` [PATCH v3 16/41] KVM: arm64: Don't deactivate VM on VHE systems Christoffer Dall 2018-01-12 12:07 ` Christoffer Dall 2018-01-12 12:07 ` [PATCH v3 17/41] KVM: arm64: Remove noop calls to timer save/restore from VHE switch Christoffer Dall 2018-01-12 12:07 ` Christoffer Dall 2018-02-09 17:53 ` Julien Grall 2018-02-09 17:53 ` Julien Grall 2018-02-13 8:53 ` Christoffer Dall 2018-02-13 8:53 ` Christoffer Dall 2018-02-13 22:31 ` Christoffer Dall 2018-02-13 22:31 ` Christoffer Dall 2018-02-19 16:30 ` Julien Grall 2018-02-19 16:30 ` Julien Grall 2018-01-12 12:07 ` [PATCH v3 18/41] KVM: arm64: Move userspace system registers into separate function Christoffer Dall 2018-01-12 12:07 ` Christoffer Dall 2018-02-09 18:50 ` Julien Grall 2018-02-09 18:50 ` Julien Grall 2018-02-14 11:22 ` Christoffer Dall 2018-02-14 11:22 ` Christoffer Dall 2018-01-12 12:07 ` [PATCH v3 19/41] KVM: arm64: Rewrite sysreg alternatives to static keys Christoffer Dall 2018-01-12 12:07 ` Christoffer Dall 2018-01-12 12:07 ` [PATCH v3 20/41] KVM: arm64: Introduce separate VHE/non-VHE sysreg save/restore functions Christoffer Dall 2018-01-12 12:07 ` Christoffer Dall 2018-01-12 12:07 ` [PATCH v3 21/41] KVM: arm/arm64: Remove leftover comment from kvm_vcpu_run_vhe Christoffer Dall 2018-01-12 12:07 ` Christoffer Dall 2018-01-12 12:07 ` [PATCH v3 22/41] KVM: arm64: Unify non-VHE host/guest sysreg save and restore functions Christoffer Dall 2018-01-12 12:07 ` Christoffer Dall 2018-01-12 12:07 ` [PATCH v3 23/41] KVM: arm64: Don't save the host ELR_EL2 and SPSR_EL2 on VHE systems Christoffer Dall 2018-01-12 12:07 ` Christoffer Dall 2018-01-12 12:07 ` [PATCH v3 24/41] KVM: arm64: Change 32-bit handling of VM system registers Christoffer Dall 2018-01-12 12:07 ` Christoffer Dall 2018-01-12 12:07 ` [PATCH v3 25/41] KVM: arm64: Rewrite system register accessors to read/write functions Christoffer Dall 2018-01-12 12:07 ` Christoffer Dall 2018-01-12 12:07 ` [PATCH v3 26/41] KVM: arm64: Introduce framework for accessing deferred sysregs Christoffer Dall 2018-01-12 12:07 ` Christoffer Dall 2018-01-17 17:52 ` Julien Thierry 2018-01-17 17:52 ` Julien Thierry 2018-01-18 13:08 ` Christoffer Dall 2018-01-18 13:08 ` Christoffer Dall 2018-01-18 13:39 ` Julien Thierry 2018-01-18 13:39 ` Julien Thierry 2018-01-23 16:04 ` Dave Martin 2018-01-23 16:04 ` Dave Martin 2018-01-25 19:54 ` Christoffer Dall 2018-01-25 19:54 ` Christoffer Dall 2018-02-09 16:17 ` Dave Martin 2018-02-09 16:17 ` Dave Martin 2018-02-13 8:55 ` Christoffer Dall 2018-02-13 8:55 ` Christoffer Dall 2018-02-13 14:27 ` Dave Martin 2018-02-13 14:27 ` Dave Martin 2018-01-12 12:07 ` [PATCH v3 27/41] KVM: arm/arm64: Prepare to handle deferred save/restore of SPSR_EL1 Christoffer Dall 2018-01-12 12:07 ` Christoffer Dall 2018-01-12 12:07 ` [PATCH v3 28/41] KVM: arm64: Prepare to handle deferred save/restore of ELR_EL1 Christoffer Dall 2018-01-12 12:07 ` Christoffer Dall 2018-01-12 12:07 ` [PATCH v3 29/41] KVM: arm64: Defer saving/restoring 64-bit sysregs to vcpu load/put on VHE Christoffer Dall 2018-01-12 12:07 ` Christoffer Dall 2018-01-12 12:07 ` [PATCH v3 30/41] KVM: arm64: Prepare to handle deferred save/restore of 32-bit registers Christoffer Dall 2018-01-12 12:07 ` Christoffer Dall 2018-01-17 18:22 ` Julien Thierry 2018-01-17 18:22 ` Julien Thierry 2018-01-18 13:12 ` Christoffer Dall 2018-01-18 13:12 ` Christoffer Dall 2018-01-12 12:07 ` [PATCH v3 31/41] KVM: arm64: Defer saving/restoring 32-bit sysregs to vcpu load/put Christoffer Dall 2018-01-12 12:07 ` Christoffer Dall 2018-01-12 12:07 ` [PATCH v3 32/41] KVM: arm64: Move common VHE/non-VHE trap config in separate functions Christoffer Dall 2018-01-12 12:07 ` Christoffer Dall 2018-01-12 12:07 ` [PATCH v3 33/41] KVM: arm64: Configure FPSIMD traps on vcpu load/put Christoffer Dall 2018-01-12 12:07 ` Christoffer Dall 2018-01-18 9:31 ` Julien Thierry 2018-01-18 9:31 ` Julien Thierry 2018-01-31 12:17 ` Tomasz Nowicki 2018-01-31 12:17 ` Tomasz Nowicki 2018-02-05 10:06 ` Christoffer Dall 2018-02-05 10:06 ` Christoffer Dall 2018-01-31 12:24 ` Tomasz Nowicki 2018-01-31 12:24 ` Tomasz Nowicki 2018-01-12 12:07 ` [PATCH v3 34/41] KVM: arm64: Configure c15, PMU, and debug register traps on cpu load/put for VHE Christoffer Dall 2018-01-12 12:07 ` Christoffer Dall 2018-01-12 12:07 ` [PATCH v3 35/41] KVM: arm64: Separate activate_traps and deactive_traps for VHE and non-VHE Christoffer Dall 2018-01-12 12:07 ` Christoffer Dall 2018-01-12 12:07 ` [PATCH v3 36/41] KVM: arm/arm64: Get rid of vgic_elrsr Christoffer Dall 2018-01-12 12:07 ` Christoffer Dall 2018-01-12 12:07 ` [PATCH v3 37/41] KVM: arm/arm64: Handle VGICv2 save/restore from the main VGIC code Christoffer Dall 2018-01-12 12:07 ` Christoffer Dall 2018-01-12 12:07 ` [PATCH v3 38/41] KVM: arm/arm64: Move arm64-only vgic-v2-sr.c file to arm64 Christoffer Dall 2018-01-12 12:07 ` Christoffer Dall 2018-01-12 12:07 ` [PATCH v3 39/41] KVM: arm/arm64: Handle VGICv3 save/restore from the main VGIC code on VHE Christoffer Dall 2018-01-12 12:07 ` Christoffer Dall 2018-01-12 12:07 ` [PATCH v3 40/41] KVM: arm/arm64: Move VGIC APR save/restore to vgic put/load Christoffer Dall 2018-01-12 12:07 ` Christoffer Dall 2018-01-12 12:07 ` [PATCH v3 41/41] KVM: arm/arm64: Avoid VGICv3 save/restore on VHE with no IRQs Christoffer Dall 2018-01-12 12:07 ` Christoffer Dall 2018-02-05 13:29 ` Tomasz Nowicki 2018-02-05 13:29 ` Tomasz Nowicki 2018-02-08 15:48 ` Christoffer Dall 2018-02-08 15:48 ` Christoffer Dall 2018-01-15 14:14 ` [PATCH v3 00/41] Optimize KVM/ARM for VHE systems Yury Norov 2018-01-15 14:14 ` Yury Norov 2018-01-15 15:50 ` Christoffer Dall 2018-01-15 15:50 ` Christoffer Dall 2018-01-17 8:34 ` Yury Norov 2018-01-17 8:34 ` Yury Norov 2018-01-17 10:48 ` Christoffer Dall 2018-01-17 10:48 ` Christoffer Dall 2018-01-18 11:16 ` Christoffer Dall 2018-01-18 11:16 ` Christoffer Dall 2018-01-18 12:18 ` Yury Norov 2018-01-18 12:18 ` Yury Norov 2018-01-18 13:32 ` Christoffer Dall 2018-01-18 13:32 ` Christoffer Dall 2018-01-22 13:40 ` Tomasz Nowicki 2018-01-22 13:40 ` Tomasz Nowicki 2018-02-01 13:57 ` Tomasz Nowicki 2018-02-01 13:57 ` Tomasz Nowicki 2018-02-01 16:15 ` Yury Norov 2018-02-01 16:15 ` Yury Norov 2018-02-02 10:05 ` Tomasz Nowicki 2018-02-02 10:05 ` Tomasz Nowicki 2018-02-02 10:07 ` Tomasz Nowicki 2018-02-02 10:07 ` Tomasz Nowicki 2018-02-08 15:47 ` Christoffer Dall 2018-02-08 15:47 ` Christoffer Dall
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