From 7d637978151511148912fe2ea2bac9f9c64f5c35 Mon Sep 17 00:00:00 2001 From: Xiantao Zhang Date: Fri, 21 Nov 2008 20:58:11 +0800 Subject: [PATCH] KVM: ia64: Define printk function for kvm-intel module kvm-intel module is relocated to an isolated address space with kernel, so it can't call host kernel's printk for debug purpose. In the module, we implement the printk to output debug info of vmm. Signed-off-by: Xiantao Zhang Signed-off-by: Avi Kivity --- arch/ia64/include/asm/kvm_host.h | 4 ++++ arch/ia64/kvm/Makefile | 2 +- arch/ia64/kvm/kvm-ia64.c | 8 ++++++++ arch/ia64/kvm/kvm_lib.c | 15 +++++++++++++++ arch/ia64/kvm/vmm.c | 26 ++++++++++++++++++++++++++ 5 files changed, 54 insertions(+), 1 deletion(-) create mode 100644 arch/ia64/kvm/kvm_lib.c diff --git a/arch/ia64/include/asm/kvm_host.h b/arch/ia64/include/asm/kvm_host.h index 678e2646a500..0560f3fae538 100644 --- a/arch/ia64/include/asm/kvm_host.h +++ b/arch/ia64/include/asm/kvm_host.h @@ -39,6 +39,7 @@ #define EXIT_REASON_EXTERNAL_INTERRUPT 6 #define EXIT_REASON_IPI 7 #define EXIT_REASON_PTC_G 8 +#define EXIT_REASON_DEBUG 20 /*Define vmm address space and vm data space.*/ #define KVM_VMM_SIZE (__IA64_UL_CONST(16)<<20) @@ -126,6 +127,8 @@ KVM_MEM_DIRTY_LOG_SIZE) / sizeof(struct kvm_vcpu_data) #define KVM_MAX_MEM_SIZE (KVM_P2M_SIZE >> 3 << PAGE_SHIFT) +#define VMM_LOG_LEN 256 + #include #include #include @@ -437,6 +440,7 @@ struct kvm_vcpu_arch { unsigned long opcode; unsigned long cause; + char log_buf[VMM_LOG_LEN]; union context host; union context guest; }; diff --git a/arch/ia64/kvm/Makefile b/arch/ia64/kvm/Makefile index 92cef66ca268..76464dc312e6 100644 --- a/arch/ia64/kvm/Makefile +++ b/arch/ia64/kvm/Makefile @@ -60,7 +60,7 @@ obj-$(CONFIG_KVM) += kvm.o CFLAGS_vcpu.o += -mfixed-range=f2-f5,f12-f127 kvm-intel-objs = vmm.o vmm_ivt.o trampoline.o vcpu.o optvfault.o mmio.o \ - vtlb.o process.o + vtlb.o process.o kvm_lib.o #Add link memcpy and memset to avoid possible structure assignment error kvm-intel-objs += memcpy.o memset.o obj-$(CONFIG_KVM_INTEL) += kvm-intel.o diff --git a/arch/ia64/kvm/kvm-ia64.c b/arch/ia64/kvm/kvm-ia64.c index 70eb829767f4..b4d24e2cce40 100644 --- a/arch/ia64/kvm/kvm-ia64.c +++ b/arch/ia64/kvm/kvm-ia64.c @@ -474,6 +474,13 @@ static int handle_external_interrupt(struct kvm_vcpu *vcpu, return 1; } +static int handle_vcpu_debug(struct kvm_vcpu *vcpu, + struct kvm_run *kvm_run) +{ + printk("VMM: %s", vcpu->arch.log_buf); + return 1; +} + static int (*kvm_vti_exit_handlers[])(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) = { [EXIT_REASON_VM_PANIC] = handle_vm_error, @@ -485,6 +492,7 @@ static int (*kvm_vti_exit_handlers[])(struct kvm_vcpu *vcpu, [EXIT_REASON_EXTERNAL_INTERRUPT] = handle_external_interrupt, [EXIT_REASON_IPI] = handle_ipi, [EXIT_REASON_PTC_G] = handle_global_purge, + [EXIT_REASON_DEBUG] = handle_vcpu_debug, }; diff --git a/arch/ia64/kvm/kvm_lib.c b/arch/ia64/kvm/kvm_lib.c new file mode 100644 index 000000000000..a85cb611ecd7 --- /dev/null +++ b/arch/ia64/kvm/kvm_lib.c @@ -0,0 +1,15 @@ +/* + * kvm_lib.c: Compile some libraries for kvm-intel module. + * + * Just include kernel's library, and disable symbols export. + * Copyright (C) 2008, Intel Corporation. + * Xiantao Zhang (xiantao.zhang@intel.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ +#undef CONFIG_MODULES +#include "../../../lib/vsprintf.c" +#include "../../../lib/ctype.c" diff --git a/arch/ia64/kvm/vmm.c b/arch/ia64/kvm/vmm.c index 2275bf4e681a..957779593c2f 100644 --- a/arch/ia64/kvm/vmm.c +++ b/arch/ia64/kvm/vmm.c @@ -62,5 +62,31 @@ void vmm_spin_unlock(spinlock_t *lock) { _vmm_raw_spin_unlock(lock); } + +static void vcpu_debug_exit(struct kvm_vcpu *vcpu) +{ + struct exit_ctl_data *p = &vcpu->arch.exit_data; + long psr; + + local_irq_save(psr); + p->exit_reason = EXIT_REASON_DEBUG; + vmm_transition(vcpu); + local_irq_restore(psr); +} + +asmlinkage int printk(const char *fmt, ...) +{ + struct kvm_vcpu *vcpu = current_vcpu; + va_list args; + int r; + + memset(vcpu->arch.log_buf, 0, VMM_LOG_LEN); + va_start(args, fmt); + r = vsnprintf(vcpu->arch.log_buf, VMM_LOG_LEN, fmt, args); + va_end(args); + vcpu_debug_exit(vcpu); + return r; +} + module_init(kvm_vmm_init) module_exit(kvm_vmm_exit)