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[PULL 11/17] target/s390x/kvm/pv: Provide some more useful information i
From: |
Thomas Huth |
Subject: |
[PULL 11/17] target/s390x/kvm/pv: Provide some more useful information if decryption fails |
Date: |
Thu, 11 Jan 2024 18:00:40 +0100 |
It's a common scenario to copy guest images from one host to another
to run the guest on the other machine. This (of course) does not work
with "secure execution" guests since they are encrypted with one certain
host key. However, if you still (accidentally) do it, you only get a
very user-unfriendly error message that looks like this:
qemu-system-s390x: KVM PV command 2 (KVM_PV_SET_SEC_PARMS) failed:
header rc 108 rrc 5 IOCTL rc: -22
Let's provide at least a somewhat nicer hint to the users so that they
are able to figure out what might have gone wrong.
Buglink: https://issues.redhat.com/browse/RHEL-18212
Message-ID: <20240110142916.850605-1-thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
hw/s390x/ipl.h | 2 +-
target/s390x/kvm/pv.h | 5 +++--
hw/s390x/ipl.c | 5 ++---
hw/s390x/s390-virtio-ccw.c | 5 ++++-
target/s390x/kvm/pv.c | 25 ++++++++++++++++++++-----
5 files changed, 30 insertions(+), 12 deletions(-)
diff --git a/hw/s390x/ipl.h b/hw/s390x/ipl.h
index 7fc86e7905..57cd125769 100644
--- a/hw/s390x/ipl.h
+++ b/hw/s390x/ipl.h
@@ -107,7 +107,7 @@ typedef union IplParameterBlock IplParameterBlock;
int s390_ipl_set_loadparm(uint8_t *loadparm);
void s390_ipl_update_diag308(IplParameterBlock *iplb);
-int s390_ipl_prepare_pv_header(void);
+int s390_ipl_prepare_pv_header(Error **errp);
int s390_ipl_pv_unpack(void);
void s390_ipl_prepare_cpu(S390CPU *cpu);
IplParameterBlock *s390_ipl_get_iplb(void);
diff --git a/target/s390x/kvm/pv.h b/target/s390x/kvm/pv.h
index 7b935e2246..5877d28ff1 100644
--- a/target/s390x/kvm/pv.h
+++ b/target/s390x/kvm/pv.h
@@ -42,7 +42,7 @@ int s390_pv_query_info(void);
int s390_pv_vm_enable(void);
void s390_pv_vm_disable(void);
bool s390_pv_vm_try_disable_async(S390CcwMachineState *ms);
-int s390_pv_set_sec_parms(uint64_t origin, uint64_t length);
+int s390_pv_set_sec_parms(uint64_t origin, uint64_t length, Error **errp);
int s390_pv_unpack(uint64_t addr, uint64_t size, uint64_t tweak);
void s390_pv_prep_reset(void);
int s390_pv_verify(void);
@@ -62,7 +62,8 @@ static inline int s390_pv_query_info(void) { return 0; }
static inline int s390_pv_vm_enable(void) { return 0; }
static inline void s390_pv_vm_disable(void) {}
static inline bool s390_pv_vm_try_disable_async(S390CcwMachineState *ms) {
return false; }
-static inline int s390_pv_set_sec_parms(uint64_t origin, uint64_t length) {
return 0; }
+static inline int s390_pv_set_sec_parms(uint64_t origin, uint64_t length,
+ Error **errp) { return 0; }
static inline int s390_pv_unpack(uint64_t addr, uint64_t size, uint64_t tweak)
{ return 0; }
static inline void s390_pv_prep_reset(void) {}
static inline int s390_pv_verify(void) { return 0; }
diff --git a/hw/s390x/ipl.c b/hw/s390x/ipl.c
index 76110e8f58..e934bf89d1 100644
--- a/hw/s390x/ipl.c
+++ b/hw/s390x/ipl.c
@@ -702,7 +702,7 @@ static void s390_ipl_prepare_qipl(S390CPU *cpu)
cpu_physical_memory_unmap(addr, len, 1, len);
}
-int s390_ipl_prepare_pv_header(void)
+int s390_ipl_prepare_pv_header(Error **errp)
{
IplParameterBlock *ipib = s390_ipl_get_iplb_pv();
IPLBlockPV *ipib_pv = &ipib->pv;
@@ -711,8 +711,7 @@ int s390_ipl_prepare_pv_header(void)
cpu_physical_memory_read(ipib_pv->pv_header_addr, hdr,
ipib_pv->pv_header_len);
- rc = s390_pv_set_sec_parms((uintptr_t)hdr,
- ipib_pv->pv_header_len);
+ rc = s390_pv_set_sec_parms((uintptr_t)hdr, ipib_pv->pv_header_len, errp);
g_free(hdr);
return rc;
}
diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c
index 1169e20b94..eaf61d3640 100644
--- a/hw/s390x/s390-virtio-ccw.c
+++ b/hw/s390x/s390-virtio-ccw.c
@@ -391,7 +391,7 @@ static int s390_machine_protect(S390CcwMachineState *ms)
}
/* Set SE header and unpack */
- rc = s390_ipl_prepare_pv_header();
+ rc = s390_ipl_prepare_pv_header(&local_err);
if (rc) {
goto out_err;
}
@@ -410,6 +410,9 @@ static int s390_machine_protect(S390CcwMachineState *ms)
return rc;
out_err:
+ if (local_err) {
+ error_report_err(local_err);
+ }
s390_machine_unprotect(ms);
return rc;
}
diff --git a/target/s390x/kvm/pv.c b/target/s390x/kvm/pv.c
index 6a69be7e5c..7ca7faec73 100644
--- a/target/s390x/kvm/pv.c
+++ b/target/s390x/kvm/pv.c
@@ -29,7 +29,8 @@ static bool info_valid;
static struct kvm_s390_pv_info_vm info_vm;
static struct kvm_s390_pv_info_dump info_dump;
-static int __s390_pv_cmd(uint32_t cmd, const char *cmdname, void *data)
+static int __s390_pv_cmd(uint32_t cmd, const char *cmdname, void *data,
+ int *pvrc)
{
struct kvm_pv_cmd pv_cmd = {
.cmd = cmd,
@@ -46,6 +47,9 @@ static int __s390_pv_cmd(uint32_t cmd, const char *cmdname,
void *data)
"IOCTL rc: %d", cmd, cmdname, pv_cmd.rc, pv_cmd.rrc,
rc);
}
+ if (pvrc) {
+ *pvrc = pv_cmd.rc;
+ }
return rc;
}
@@ -53,12 +57,13 @@ static int __s390_pv_cmd(uint32_t cmd, const char *cmdname,
void *data)
* This macro lets us pass the command as a string to the function so
* we can print it on an error.
*/
-#define s390_pv_cmd(cmd, data) __s390_pv_cmd(cmd, #cmd, data)
+#define s390_pv_cmd(cmd, data) __s390_pv_cmd(cmd, #cmd, data, NULL)
+#define s390_pv_cmd_pvrc(cmd, data, pvrc) __s390_pv_cmd(cmd, #cmd, data, pvrc)
#define s390_pv_cmd_exit(cmd, data) \
{ \
int rc; \
\
- rc = __s390_pv_cmd(cmd, #cmd, data);\
+ rc = __s390_pv_cmd(cmd, #cmd, data, NULL); \
if (rc) { \
exit(1); \
} \
@@ -142,14 +147,24 @@ bool s390_pv_vm_try_disable_async(S390CcwMachineState *ms)
return true;
}
-int s390_pv_set_sec_parms(uint64_t origin, uint64_t length)
+int s390_pv_set_sec_parms(uint64_t origin, uint64_t length, Error **errp)
{
+ int ret, pvrc;
struct kvm_s390_pv_sec_parm args = {
.origin = origin,
.length = length,
};
- return s390_pv_cmd(KVM_PV_SET_SEC_PARMS, &args);
+ ret = s390_pv_cmd_pvrc(KVM_PV_SET_SEC_PARMS, &args, &pvrc);
+ if (ret) {
+ error_setg(errp, "Failed to set secure execution parameters");
+ if (pvrc == 0x108) {
+ error_append_hint(errp, "Please check whether the image is "
+ "correctly encrypted for this host\n");
+ }
+ }
+
+ return ret;
}
/*
--
2.43.0
- [PULL 00/17] Misc patches (qtests, s390x, m68k, gitlab-ci), Thomas Huth, 2024/01/11
- [PULL 01/17] q800: move dp8393x_prom memory region to Q800MachineState, Thomas Huth, 2024/01/11
- [PULL 03/17] Revert "netdev: set timeout depending on loadavg", Thomas Huth, 2024/01/11
- [PULL 06/17] net: add explicit info about connecting/listening state, Thomas Huth, 2024/01/11
- [PULL 02/17] qtest: use correct boolean type for failover property, Thomas Huth, 2024/01/11
- [PULL 07/17] net: handle QIOTask completion to report useful error message, Thomas Huth, 2024/01/11
- [PULL 05/17] Revert "tests/qtest/netdev-socket: Raise connection timeout to 120 seconds", Thomas Huth, 2024/01/11
- [PULL 08/17] qtest: ensure netdev-socket tests have non-overlapping names, Thomas Huth, 2024/01/11
- [PULL 04/17] Revert "osdep: add getloadavg", Thomas Huth, 2024/01/11
- [PULL 10/17] gitlab: fix s390x tag for avocado-system-centos, Thomas Huth, 2024/01/11
- [PULL 11/17] target/s390x/kvm/pv: Provide some more useful information if decryption fails,
Thomas Huth <=
- [PULL 09/17] tests/qtest/virtio-ccw: Fix device presence checking, Thomas Huth, 2024/01/11
- [PULL 13/17] hw/s390x/ccw: Replace dirname() with g_path_get_dirname(), Thomas Huth, 2024/01/11
- [PULL 15/17] target/s390x: Fix LAE setting a wrong access register, Thomas Huth, 2024/01/11
- [PULL 14/17] scripts/checkpatch: Support codespell checking, Thomas Huth, 2024/01/11
- [PULL 12/17] hw/s390x/ccw: Replace basename() with g_path_get_basename(), Thomas Huth, 2024/01/11
- [PULL 16/17] tests/tcg/s390x: Test LOAD ADDRESS EXTENDED, Thomas Huth, 2024/01/11
- [PULL 17/17] .gitlab-ci.d/buildtest.yml: Work around htags bug when environment is large, Thomas Huth, 2024/01/11
- Re: [PULL 00/17] Misc patches (qtests, s390x, m68k, gitlab-ci), Peter Maydell, 2024/01/12