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[Qemu-devel] [PATCH V4 05/10] Add a debug register
From: |
Stefan Berger |
Subject: |
[Qemu-devel] [PATCH V4 05/10] Add a debug register |
Date: |
Fri, 06 May 2011 13:32:29 -0400 |
User-agent: |
quilt/0.48-1 |
This patch uses the possibility to add a vendor-specific register and
adds a debug register useful for dumping the TIS's internal state. This
register is only active in a debug build (#define DEBUG_TIS).
v3:
- all output goes to stderr
Signed-off-by: Stefan Berger <address@hidden>
---
hw/tpm_tis.c | 67 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 67 insertions(+)
Index: qemu-git/hw/tpm_tis.c
===================================================================
--- qemu-git.orig/hw/tpm_tis.c
+++ qemu-git/hw/tpm_tis.c
@@ -42,6 +42,8 @@
#define TIS_REG_DID_VID 0xf00
#define TIS_REG_RID 0xf04
+/* vendor-specific registers */
+#define TIS_REG_DEBUG 0xf90
#define STS_VALID (1 << 7)
#define STS_COMMAND_READY (1 << 6)
@@ -356,6 +358,66 @@ static uint32_t tis_data_read(TPMState *
}
+#ifdef DEBUG_TIS
+static void tis_dump_state(void *opaque, target_phys_addr_t addr)
+{
+ static const unsigned regs[] = {
+ TIS_REG_ACCESS,
+ TIS_REG_INT_ENABLE,
+ TIS_REG_INT_VECTOR,
+ TIS_REG_INT_STATUS,
+ TIS_REG_INTF_CAPABILITY,
+ TIS_REG_STS,
+ TIS_REG_DID_VID,
+ TIS_REG_RID,
+ 0xfff};
+ int idx;
+ uint8_t locty = tis_locality_from_addr(addr);
+ target_phys_addr_t base = addr & ~0xfff;
+ TPMState *s = opaque;
+
+ fprintf(stderr,
+ "tpm_tis: active locality : %d\n"
+ "tpm_tis: state of locality %d : %d\n"
+ "tpm_tis: register dump:\n",
+ s->active_locty,
+ locty, s->loc[locty].state);
+
+ for (idx = 0; regs[idx] != 0xfff; idx++) {
+ fprintf(stderr, "tpm_tis: 0x%04x : 0x%08x\n", regs[idx],
+ tis_mem_readl(opaque, base + regs[idx]));
+ }
+
+ fprintf(stderr,
+ "tpm_tis: read offset : %d\n"
+ "tpm_tis: result buffer : ",
+ s->loc[locty].r_offset);
+ for (idx = 0;
+ idx < tis_get_size_from_buffer(&s->loc[locty].r_buffer);
+ idx++) {
+ fprintf(stderr, "%c%02x%s",
+ s->loc[locty].r_offset == idx ? '>' : ' ',
+ s->loc[locty].r_buffer.buffer[idx],
+ ((idx & 0xf) == 0xf) ? "\ntpm_tis: " : "");
+ }
+ fprintf(stderr,
+ "\n"
+ "tpm_tis: write offset : %d\n"
+ "tpm_tis: request buffer: ",
+ s->loc[locty].w_offset);
+ for (idx = 0;
+ idx < tis_get_size_from_buffer(&s->loc[locty].w_buffer);
+ idx++) {
+ fprintf(stderr, "%c%02x%s",
+ s->loc[locty].w_offset == idx ? '>' : ' ',
+ s->loc[locty].w_buffer.buffer[idx],
+ ((idx & 0xf) == 0xf) ? "\ntpm_tis: " : "");
+ }
+ fprintf(stderr,"\n");
+}
+#endif
+
+
/*
* Read a register of the TIS interface
* See specs pages 33-63 for description of the registers
@@ -431,6 +493,11 @@ static uint32_t tis_mem_readl(void *opaq
case TIS_REG_RID:
val = TPM_RID;
break;
+#ifdef DEBUG_TIS
+ case TIS_REG_DEBUG:
+ tis_dump_state(opaque, addr);
+ break;
+#endif
}
qemu_mutex_unlock(&s->state_lock);
- [Qemu-devel] [PATCH V4 00/10] Qemu Trusted Platform Module (TPM) integration, Stefan Berger, 2011/05/06
- [Qemu-devel] [PATCH V4 04/10] Add tpm_tis driver to build process, Stefan Berger, 2011/05/06
- [Qemu-devel] [PATCH V4 10/10] Encrypt state blobs using AES CBC encryption, Stefan Berger, 2011/05/06
- [Qemu-devel] [PATCH V4 09/10] Add block storage support for libtpms based TPM backend, Stefan Berger, 2011/05/06
- [Qemu-devel] [PATCH V4 03/10] Add persistent state handling to TPM TIS frontend driver, Stefan Berger, 2011/05/06
- [Qemu-devel] [PATCH V4 08/10] Introduce file lock for the block layer, Stefan Berger, 2011/05/06
- [Qemu-devel] [PATCH V4 05/10] Add a debug register,
Stefan Berger <=
- [Qemu-devel] [PATCH V4 07/10] Implementation of the libtpms-based backend, Stefan Berger, 2011/05/06
- [Qemu-devel] [PATCH V4 01/10] Support for TPM command line options, Stefan Berger, 2011/05/06
- Re: [Qemu-devel] [PATCH V4 01/10] Support for TPM command line options, Serge E. Hallyn, 2011/05/17
- Re: [Qemu-devel] [PATCH V4 01/10] Support for TPM command line options, Stefan Berger, 2011/05/17
[Qemu-devel] [PATCH V4 06/10] Add a TPM backend skeleton implementation, Stefan Berger, 2011/05/06