diff options
| author | Christoph Schlameuss <schlameuss@linux.ibm.com> | 2024-08-07 17:45:07 +0200 |
|---|---|---|
| committer | Janosch Frank <frankja@linux.ibm.com> | 2024-08-19 07:51:15 +0000 |
| commit | 100932fc37d468bfa80b5675b653ff65f7bafba7 (patch) | |
| tree | b285f0bf52e948c9108f00baed3d1b4c84cbe19f /tools | |
| parent | d4f8592f6c42a6df7f570be6c4ccf8bd40838aab (diff) | |
selftests: kvm: s390: Add debug print functions
Add functions to simply print some basic state information in selftests.
The output can be enabled by setting:
#define TH_LOG_ENABLED 1
#define DEBUG 1
* print_psw: current SIE state description and VM run state
* print_hex_bytes: print memory with some counting markers
* print_hex: PRINT_HEX with 512 bytes
* print_run: use print_psw and print_hex to print contents of VM run
state and SIE state description
* print_regs: print content of general and control registers
All prints use pr_debug for the output and can be configured using
DEBUG.
Signed-off-by: Christoph Schlameuss <schlameuss@linux.ibm.com>
Acked-by: Janosch Frank <frankja@linux.ibm.com>
Link: https://lore.kernel.org/r/20240807154512.316936-6-schlameuss@linux.ibm.com
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Message-ID: <20240807154512.316936-6-schlameuss@linux.ibm.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/testing/selftests/kvm/include/s390x/debug_print.h | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/tools/testing/selftests/kvm/include/s390x/debug_print.h b/tools/testing/selftests/kvm/include/s390x/debug_print.h new file mode 100644 index 000000000000..1bf275631cc6 --- /dev/null +++ b/tools/testing/selftests/kvm/include/s390x/debug_print.h @@ -0,0 +1,69 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Definition for kernel virtual machines on s390x + * + * Copyright IBM Corp. 2024 + * + * Authors: + * Christoph Schlameuss <schlameuss@linux.ibm.com> + */ + +#ifndef SELFTEST_KVM_DEBUG_PRINT_H +#define SELFTEST_KVM_DEBUG_PRINT_H + +#include "asm/ptrace.h" +#include "kvm_util.h" +#include "sie.h" + +static inline void print_hex_bytes(const char *name, u64 addr, size_t len) +{ + u64 pos; + + pr_debug("%s (%p)\n", name, (void *)addr); + pr_debug(" 0/0x00---------|"); + if (len > 8) + pr_debug(" 8/0x08---------|"); + if (len > 16) + pr_debug(" 16/0x10--------|"); + if (len > 24) + pr_debug(" 24/0x18--------|"); + for (pos = 0; pos < len; pos += 8) { + if ((pos % 32) == 0) + pr_debug("\n %3lu 0x%.3lx ", pos, pos); + pr_debug(" %16lx", *((u64 *)(addr + pos))); + } + pr_debug("\n"); +} + +static inline void print_hex(const char *name, u64 addr) +{ + print_hex_bytes(name, addr, 512); +} + +static inline void print_psw(struct kvm_run *run, struct kvm_s390_sie_block *sie_block) +{ + pr_debug("flags:0x%x psw:0x%.16llx:0x%.16llx exit:%u %s\n", + run->flags, + run->psw_mask, run->psw_addr, + run->exit_reason, exit_reason_str(run->exit_reason)); + pr_debug("sie_block psw:0x%.16llx:0x%.16llx\n", + sie_block->psw_mask, sie_block->psw_addr); +} + +static inline void print_run(struct kvm_run *run, struct kvm_s390_sie_block *sie_block) +{ + print_hex_bytes("run", (u64)run, 0x150); + print_hex("sie_block", (u64)sie_block); + print_psw(run, sie_block); +} + +static inline void print_regs(struct kvm_run *run) +{ + struct kvm_sync_regs *sync_regs = &run->s.regs; + + print_hex_bytes("GPRS", (u64)sync_regs->gprs, 8 * NUM_GPRS); + print_hex_bytes("ACRS", (u64)sync_regs->acrs, 4 * NUM_ACRS); + print_hex_bytes("CRS", (u64)sync_regs->crs, 8 * NUM_CRS); +} + +#endif /* SELFTEST_KVM_DEBUG_PRINT_H */ |