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[Qemu-devel] [PATCH v8 25/27] kvm: Add API to read/write a CPU MSR value
From: |
Jon Doron |
Subject: |
[Qemu-devel] [PATCH v8 25/27] kvm: Add API to read/write a CPU MSR value |
Date: |
Thu, 2 May 2019 10:26:39 +0300 |
Signed-off-by: Jon Doron <address@hidden>
---
accel/kvm/kvm-all.c | 39 +++++++++++++++++++++++++++++++++++++++
include/sysemu/kvm.h | 2 ++
2 files changed, 41 insertions(+)
diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index 524c4ddfbd..35207d910b 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -2444,6 +2444,45 @@ void kvm_remove_all_breakpoints(CPUState *cpu)
}
#endif /* !KVM_CAP_SET_GUEST_DEBUG */
+int kvm_arch_read_msr(CPUState *cpu, uint32_t index, uint64_t *value)
+{
+ struct {
+ struct kvm_msrs info;
+ struct kvm_msr_entry entries[1];
+ } msr_data;
+ int ret;
+
+ msr_data.info.nmsrs = 1;
+ msr_data.entries[0].index = index;
+ ret = kvm_vcpu_ioctl(cpu, KVM_GET_MSRS, &msr_data);
+ if (ret < 0) {
+ return ret;
+ }
+
+ *value = msr_data.entries[0].data;
+ return 0;
+}
+
+int kvm_arch_write_msr(CPUState *cpu, uint32_t index, uint64_t value)
+{
+ struct {
+ struct kvm_msrs info;
+ struct kvm_msr_entry entries[1];
+ } msr_data;
+ int ret;
+
+ msr_data.info.nmsrs = 1;
+ msr_data.entries[0].index = index;
+ msr_data.entries[0].reserved = 0;
+ msr_data.entries[0].data = value;
+ ret = kvm_vcpu_ioctl(cpu, KVM_SET_MSRS, &msr_data);
+ if (ret < 0) {
+ return ret;
+ }
+
+ return 0;
+}
+
static int kvm_set_signal_mask(CPUState *cpu, const sigset_t *sigset)
{
KVMState *s = kvm_state;
diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h
index a6d1cd190f..409b1a5444 100644
--- a/include/sysemu/kvm.h
+++ b/include/sysemu/kvm.h
@@ -462,6 +462,8 @@ int kvm_vm_check_extension(KVMState *s, unsigned int
extension);
uint32_t kvm_arch_get_supported_cpuid(KVMState *env, uint32_t function,
uint32_t index, int reg);
uint32_t kvm_arch_get_supported_msr_feature(KVMState *s, uint32_t index);
+int kvm_arch_read_msr(CPUState *cpu, uint32_t index, uint64_t *value);
+int kvm_arch_write_msr(CPUState *cpu, uint32_t index, uint64_t value);
void kvm_set_sigmask_len(KVMState *s, unsigned int sigmask_len);
--
2.20.1
- [Qemu-devel] [PATCH v8 01/27] gdbstub: Add infrastructure to parse cmd packets, (continued)
- [Qemu-devel] [PATCH v8 01/27] gdbstub: Add infrastructure to parse cmd packets, Jon Doron, 2019/05/02
- [Qemu-devel] [PATCH v8 02/27] gdbstub: Implement deatch (D pkt) with new infra, Jon Doron, 2019/05/02
- [Qemu-devel] [PATCH v8 03/27] gdbstub: Implement thread_alive (T pkt) with new infra, Jon Doron, 2019/05/02
- [Qemu-devel] [PATCH v8 10/27] gdbstub: Implement get register (p pkt) with new infra, Jon Doron, 2019/05/02
- [Qemu-devel] [PATCH v8 13/27] gdbstub: Implement write all registers (G pkt) with new infra, Jon Doron, 2019/05/02
- [Qemu-devel] [PATCH v8 27/27] gdbstub: Add support to write a MSR for KVM target, Jon Doron, 2019/05/02
- [Qemu-devel] [PATCH v8 16/27] gdbstub: Implement step (s pkt) with new infra, Jon Doron, 2019/05/02
- [Qemu-devel] [PATCH v8 09/27] gdbstub: Implement set register (P pkt) with new infra, Jon Doron, 2019/05/02
- [Qemu-devel] [PATCH v8 05/27] gdbstub: Implement continue with signal (C pkt) with new infra, Jon Doron, 2019/05/02
- [Qemu-devel] [PATCH v8 17/27] gdbstub: Implement v commands with new infra, Jon Doron, 2019/05/02
- [Qemu-devel] [PATCH v8 25/27] kvm: Add API to read/write a CPU MSR value,
Jon Doron <=
- [Qemu-devel] [PATCH v8 06/27] gdbstub: Implement set_thread (H pkt) with new infra, Jon Doron, 2019/05/02
- [Qemu-devel] [PATCH v8 07/27] gdbstub: Implement insert breakpoint (Z pkt) with new infra, Jon Doron, 2019/05/02
- [Qemu-devel] [PATCH v8 24/27] gdbstub: Add another handler for setting qemu.sstep, Jon Doron, 2019/05/02
- [Qemu-devel] [PATCH v8 23/27] gdbstub: Implement qemu physical memory mode, Jon Doron, 2019/05/02
- [Qemu-devel] [PATCH v8 21/27] gdbstub: Clear unused variables in gdb_handle_packet, Jon Doron, 2019/05/02
- [Qemu-devel] [PATCH v8 11/27] gdbstub: Implement write memory (M pkt) with new infra, Jon Doron, 2019/05/02
- [Qemu-devel] [PATCH v8 20/27] gdbstub: Implement target halted (? pkt) with new infra, Jon Doron, 2019/05/02
- [Qemu-devel] [PATCH v8 15/27] gdbstub: Implement file io (F pkt) with new infra, Jon Doron, 2019/05/02
- [Qemu-devel] [PATCH v8 08/27] gdbstub: Implement remove breakpoint (z pkt) with new infra, Jon Doron, 2019/05/02
- [Qemu-devel] [PATCH v8 19/27] gdbstub: Implement generic set (Q pkt) with new infra, Jon Doron, 2019/05/02