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From 95c229506a6e7261fce184488e880a94f9ba0789 Mon Sep 17 00:00:00 2001
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From: Janosch Frank <frankja@linux.ibm.com>
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Date: Mon, 17 Oct 2022 08:38:21 +0000
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Subject: [PATCH 40/42] s390x: Add KVM PV dump interface
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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RH-Author: Cédric Le Goater <clg@redhat.com>
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RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
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RH-Bugzilla: 1664378 2043909
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RH-Acked-by: Thomas Huth <thuth@redhat.com>
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RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
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RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
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RH-Commit: [40/41] 5df512a63b2ed17991489565b70f89f4efc0b639
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Let's add a few bits of code which hide the new KVM PV dump API from
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us via new functions.
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Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
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Reviewed-by: Janis Schoetterl-Glausch <scgl@linux.ibm.com>
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Reviewed-by: Steffen Eiden <seiden@linux.ibm.com>
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[ Marc-André: fix up for compilation issue ]
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Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
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Message-Id: <20221017083822.43118-10-frankja@linux.ibm.com>
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(cherry picked from commit 753ca06f4706cd6e57750a606afb08c5c5299643)
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Signed-off-by: Cédric Le Goater <clg@redhat.com>
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---
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hw/s390x/pv.c | 51 +++++++++++++++++++++++++++++++++++++++++++
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include/hw/s390x/pv.h | 9 ++++++++
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2 files changed, 60 insertions(+)
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diff --git a/hw/s390x/pv.c b/hw/s390x/pv.c
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index 4c012f2eeb..728ba24547 100644
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--- a/hw/s390x/pv.c
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+++ b/hw/s390x/pv.c
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@@ -175,6 +175,57 @@ bool kvm_s390_pv_info_basic_valid(void)
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return info_valid;
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}
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+static int s390_pv_dump_cmd(uint64_t subcmd, uint64_t uaddr, uint64_t gaddr,
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+ uint64_t len)
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+{
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+ struct kvm_s390_pv_dmp dmp = {
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+ .subcmd = subcmd,
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+ .buff_addr = uaddr,
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+ .buff_len = len,
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+ .gaddr = gaddr,
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+ };
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+ int ret;
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+
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+ ret = s390_pv_cmd(KVM_PV_DUMP, (void *)&dmp);
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+ if (ret) {
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+ error_report("KVM DUMP command %ld failed", subcmd);
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+ }
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+ return ret;
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+}
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+
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+int kvm_s390_dump_cpu(S390CPU *cpu, void *buff)
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+{
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+ struct kvm_s390_pv_dmp dmp = {
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+ .subcmd = KVM_PV_DUMP_CPU,
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+ .buff_addr = (uint64_t)buff,
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+ .gaddr = 0,
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+ .buff_len = info_dump.dump_cpu_buffer_len,
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+ };
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+ struct kvm_pv_cmd pv = {
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+ .cmd = KVM_PV_DUMP,
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+ .data = (uint64_t)&dmp,
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+ };
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+
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+ return kvm_vcpu_ioctl(CPU(cpu), KVM_S390_PV_CPU_COMMAND, &pv;;
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+}
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+
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+int kvm_s390_dump_init(void)
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+{
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+ return s390_pv_dump_cmd(KVM_PV_DUMP_INIT, 0, 0, 0);
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+}
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+
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+int kvm_s390_dump_mem_state(uint64_t gaddr, size_t len, void *dest)
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+{
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+ return s390_pv_dump_cmd(KVM_PV_DUMP_CONFIG_STOR_STATE, (uint64_t)dest,
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+ gaddr, len);
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+}
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+
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+int kvm_s390_dump_completion_data(void *buff)
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+{
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+ return s390_pv_dump_cmd(KVM_PV_DUMP_COMPLETE, (uint64_t)buff, 0,
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+ info_dump.dump_config_finalize_len);
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+}
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+
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#define TYPE_S390_PV_GUEST "s390-pv-guest"
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OBJECT_DECLARE_SIMPLE_TYPE(S390PVGuest, S390_PV_GUEST)
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diff --git a/include/hw/s390x/pv.h b/include/hw/s390x/pv.h
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index e5ea0eca16..9360aa1091 100644
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--- a/include/hw/s390x/pv.h
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+++ b/include/hw/s390x/pv.h
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@@ -51,6 +51,10 @@ uint64_t kvm_s390_pv_dmp_get_size_cpu(void);
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uint64_t kvm_s390_pv_dmp_get_size_mem_state(void);
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uint64_t kvm_s390_pv_dmp_get_size_completion_data(void);
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bool kvm_s390_pv_info_basic_valid(void);
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+int kvm_s390_dump_init(void);
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+int kvm_s390_dump_cpu(S390CPU *cpu, void *buff);
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+int kvm_s390_dump_mem_state(uint64_t addr, size_t len, void *dest);
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+int kvm_s390_dump_completion_data(void *buff);
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#else /* CONFIG_KVM */
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static inline bool s390_is_pv(void) { return false; }
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static inline int s390_pv_query_info(void) { return 0; }
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@@ -66,6 +70,11 @@ static inline uint64_t kvm_s390_pv_dmp_get_size_cpu(void) { return 0; }
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static inline uint64_t kvm_s390_pv_dmp_get_size_mem_state(void) { return 0; }
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static inline uint64_t kvm_s390_pv_dmp_get_size_completion_data(void) { return 0; }
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static inline bool kvm_s390_pv_info_basic_valid(void) { return false; }
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+static inline int kvm_s390_dump_init(void) { return 0; }
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+static inline int kvm_s390_dump_cpu(S390CPU *cpu, void *buff) { return 0; }
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+static inline int kvm_s390_dump_mem_state(uint64_t addr, size_t len,
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+ void *dest) { return 0; }
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+static inline int kvm_s390_dump_completion_data(void *buff) { return 0; }
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#endif /* CONFIG_KVM */
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int s390_pv_kvm_init(ConfidentialGuestSupport *cgs, Error **errp);
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--
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2.37.3
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