27291e2165
This patch adds support to debug the guest using the PER facility on s390. Single-stepping, hardware breakpoints and hardware watchpoints are supported. In order to use the PER facility of the guest without it noticing it, the control registers of the guest have to be patched and access to them has to be intercepted(stctl, stctg, lctl, lctlg). All PER program interrupts have to be intercepted and only the relevant PER interrupts for the guest have to be given back. Special care has to be taken about repeated exits on the same hardware breakpoint. The intervention of the host in the guests PER configuration is not fully transparent. PER instruction nullification can not be used by the guest and too many storage alteration events may be reported to the guest (if it is activated for special address ranges only) when the host concurrently debugging it. Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
132 lines
3.4 KiB
C
132 lines
3.4 KiB
C
#ifndef __LINUX_KVM_S390_H
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#define __LINUX_KVM_S390_H
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/*
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* KVM s390 specific structures and definitions
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*
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* Copyright IBM Corp. 2008
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License (version 2 only)
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* as published by the Free Software Foundation.
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*
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* Author(s): Carsten Otte <cotte@de.ibm.com>
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* Christian Borntraeger <borntraeger@de.ibm.com>
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*/
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#include <linux/types.h>
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#define __KVM_S390
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#define __KVM_HAVE_GUEST_DEBUG
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/* Device control API: s390-specific devices */
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#define KVM_DEV_FLIC_GET_ALL_IRQS 1
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#define KVM_DEV_FLIC_ENQUEUE 2
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#define KVM_DEV_FLIC_CLEAR_IRQS 3
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#define KVM_DEV_FLIC_APF_ENABLE 4
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#define KVM_DEV_FLIC_APF_DISABLE_WAIT 5
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#define KVM_DEV_FLIC_ADAPTER_REGISTER 6
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#define KVM_DEV_FLIC_ADAPTER_MODIFY 7
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/*
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* We can have up to 4*64k pending subchannels + 8 adapter interrupts,
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* as well as up to ASYNC_PF_PER_VCPU*KVM_MAX_VCPUS pfault done interrupts.
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* There are also sclp and machine checks. This gives us
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* sizeof(kvm_s390_irq)*(4*65536+8+64*64+1+1) = 72 * 266250 = 19170000
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* Lets round up to 8192 pages.
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*/
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#define KVM_S390_MAX_FLOAT_IRQS 266250
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#define KVM_S390_FLIC_MAX_BUFFER 0x2000000
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struct kvm_s390_io_adapter {
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__u32 id;
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__u8 isc;
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__u8 maskable;
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__u8 swap;
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__u8 pad;
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};
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#define KVM_S390_IO_ADAPTER_MASK 1
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#define KVM_S390_IO_ADAPTER_MAP 2
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#define KVM_S390_IO_ADAPTER_UNMAP 3
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struct kvm_s390_io_adapter_req {
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__u32 id;
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__u8 type;
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__u8 mask;
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__u16 pad0;
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__u64 addr;
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};
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/* kvm attr_group on vm fd */
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#define KVM_S390_VM_MEM_CTRL 0
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/* kvm attributes for mem_ctrl */
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#define KVM_S390_VM_MEM_ENABLE_CMMA 0
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#define KVM_S390_VM_MEM_CLR_CMMA 1
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/* for KVM_GET_REGS and KVM_SET_REGS */
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struct kvm_regs {
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/* general purpose regs for s390 */
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__u64 gprs[16];
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};
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/* for KVM_GET_SREGS and KVM_SET_SREGS */
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struct kvm_sregs {
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__u32 acrs[16];
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__u64 crs[16];
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};
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/* for KVM_GET_FPU and KVM_SET_FPU */
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struct kvm_fpu {
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__u32 fpc;
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__u64 fprs[16];
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};
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#define KVM_GUESTDBG_USE_HW_BP 0x00010000
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#define KVM_HW_BP 1
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#define KVM_HW_WP_WRITE 2
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#define KVM_SINGLESTEP 4
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struct kvm_debug_exit_arch {
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__u64 addr;
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__u8 type;
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__u8 pad[7]; /* Should be set to 0 */
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};
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struct kvm_hw_breakpoint {
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__u64 addr;
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__u64 phys_addr;
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__u64 len;
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__u8 type;
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__u8 pad[7]; /* Should be set to 0 */
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};
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/* for KVM_SET_GUEST_DEBUG */
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struct kvm_guest_debug_arch {
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__u32 nr_hw_bp;
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__u32 pad; /* Should be set to 0 */
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struct kvm_hw_breakpoint __user *hw_bp;
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};
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#define KVM_SYNC_PREFIX (1UL << 0)
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#define KVM_SYNC_GPRS (1UL << 1)
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#define KVM_SYNC_ACRS (1UL << 2)
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#define KVM_SYNC_CRS (1UL << 3)
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/* definition of registers in kvm_run */
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struct kvm_sync_regs {
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__u64 prefix; /* prefix register */
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__u64 gprs[16]; /* general purpose registers */
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__u32 acrs[16]; /* access registers */
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__u64 crs[16]; /* control registers */
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};
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#define KVM_REG_S390_TODPR (KVM_REG_S390 | KVM_REG_SIZE_U32 | 0x1)
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#define KVM_REG_S390_EPOCHDIFF (KVM_REG_S390 | KVM_REG_SIZE_U64 | 0x2)
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#define KVM_REG_S390_CPU_TIMER (KVM_REG_S390 | KVM_REG_SIZE_U64 | 0x3)
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#define KVM_REG_S390_CLOCK_COMP (KVM_REG_S390 | KVM_REG_SIZE_U64 | 0x4)
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#define KVM_REG_S390_PFTOKEN (KVM_REG_S390 | KVM_REG_SIZE_U64 | 0x5)
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#define KVM_REG_S390_PFCOMPARE (KVM_REG_S390 | KVM_REG_SIZE_U64 | 0x6)
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#define KVM_REG_S390_PFSELECT (KVM_REG_S390 | KVM_REG_SIZE_U64 | 0x7)
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#define KVM_REG_S390_PP (KVM_REG_S390 | KVM_REG_SIZE_U64 | 0x8)
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#define KVM_REG_S390_GBEA (KVM_REG_S390 | KVM_REG_SIZE_U64 | 0x9)
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#endif
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