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[PULL 037/115] hw/i386/vmport: Add support for CMD_GETHZ
From: |
Paolo Bonzini |
Subject: |
[PULL 037/115] hw/i386/vmport: Add support for CMD_GETHZ |
Date: |
Thu, 11 Jun 2020 15:43:31 -0400 |
From: Liran Alon <liran.alon@oracle.com>
This command returns to guest information on LAPIC bus frequency and TSC
frequency.
One can see how this interface is used by Linux vmware_platform_setup()
introduced in Linux commit 88b094fb8d4f ("x86: Hypervisor detection and
get tsc_freq from hypervisor").
Reviewed-by: Nikita Leshenko <nikita.leshchenko@oracle.com>
Signed-off-by: Liran Alon <liran.alon@oracle.com>
Message-Id: <20200312165431.82118-16-liran.alon@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
hw/i386/vmport.c | 19 +++++++++++++++++++
include/hw/i386/vmport.h | 1 +
2 files changed, 20 insertions(+)
diff --git a/hw/i386/vmport.c b/hw/i386/vmport.c
index 21d4ff048a..309cfd105b 100644
--- a/hw/i386/vmport.c
+++ b/hw/i386/vmport.c
@@ -174,6 +174,24 @@ static uint32_t vmport_cmd_ram_size(void *opaque, uint32_t
addr)
return ram_size;
}
+static uint32_t vmport_cmd_get_hz(void *opaque, uint32_t addr)
+{
+ X86CPU *cpu = X86_CPU(current_cpu);
+
+ if (cpu->env.tsc_khz && cpu->env.apic_bus_freq) {
+ uint64_t tsc_freq = (uint64_t)cpu->env.tsc_khz * 1000;
+
+ cpu->env.regs[R_ECX] = cpu->env.apic_bus_freq;
+ cpu->env.regs[R_EBX] = (uint32_t)(tsc_freq >> 32);
+ cpu->env.regs[R_EAX] = (uint32_t)tsc_freq;
+ } else {
+ /* Signal cmd as not supported */
+ cpu->env.regs[R_EBX] = UINT32_MAX;
+ }
+
+ return cpu->env.regs[R_EAX];
+}
+
static uint32_t vmport_cmd_get_vcpu_info(void *opaque, uint32_t addr)
{
X86CPU *cpu = X86_CPU(current_cpu);
@@ -211,6 +229,7 @@ static void vmport_realizefn(DeviceState *dev, Error **errp)
vmport_register(VMPORT_CMD_GETRAMSIZE, vmport_cmd_ram_size, NULL);
if (s->compat_flags & VMPORT_COMPAT_CMDS_V2) {
vmport_register(VMPORT_CMD_GETBIOSUUID, vmport_cmd_get_bios_uuid,
NULL);
+ vmport_register(VMPORT_CMD_GETHZ, vmport_cmd_get_hz, NULL);
vmport_register(VMPORT_CMD_GET_VCPU_INFO, vmport_cmd_get_vcpu_info,
NULL);
}
diff --git a/include/hw/i386/vmport.h b/include/hw/i386/vmport.h
index 7656432358..c380b9c1f0 100644
--- a/include/hw/i386/vmport.h
+++ b/include/hw/i386/vmport.h
@@ -13,6 +13,7 @@ typedef enum {
VMPORT_CMD_VMMOUSE_DATA = 39,
VMPORT_CMD_VMMOUSE_STATUS = 40,
VMPORT_CMD_VMMOUSE_COMMAND = 41,
+ VMPORT_CMD_GETHZ = 45,
VMPORT_CMD_GET_VCPU_INFO = 68,
VMPORT_ENTRIES
} VMPortCommand;
--
2.26.2
- [PULL 052/115] target/i386: fix fscale handling of signaling NaN, (continued)
- [PULL 052/115] target/i386: fix fscale handling of signaling NaN, Paolo Bonzini, 2020/06/11
- [PULL 043/115] qom/object: pass (Object *) to object_initialize_with_type(), Paolo Bonzini, 2020/06/11
- [PULL 034/115] hw/i386/vmport: Add support for CMD_GET_VCPU_INFO, Paolo Bonzini, 2020/06/11
- [PULL 049/115] megasas: avoid NULL pointer dereference, Paolo Bonzini, 2020/06/11
- [PULL 061/115] target/i386: fix fxam handling of invalid encodings, Paolo Bonzini, 2020/06/11
- [PULL 062/115] target/i386: fix fbstp handling of negative zero, Paolo Bonzini, 2020/06/11
- [PULL 065/115] hw/i386/vmport: Allow QTest use without crashing, Paolo Bonzini, 2020/06/11
- [PULL 063/115] target/i386: fix fbstp handling of out-of-range values, Paolo Bonzini, 2020/06/11
- [PULL 054/115] target/i386: fix fscale handling of infinite exponents, Paolo Bonzini, 2020/06/11
- [PULL 044/115] qom/container: remove .instance_size initializer from container_info, Paolo Bonzini, 2020/06/11
- [PULL 037/115] hw/i386/vmport: Add support for CMD_GETHZ,
Paolo Bonzini <=
- [PULL 045/115] cpus: Fix botched configure_icount() error API violation fix, Paolo Bonzini, 2020/06/11
- [PULL 041/115] qom/object: factor out the initialization of hash table of properties, Paolo Bonzini, 2020/06/11
- [PULL 055/115] target/i386: fix fscale handling of rounding precision, Paolo Bonzini, 2020/06/11
- [PULL 059/115] hw/elf_ops: Do not ignore write failures when loading ELF, Paolo Bonzini, 2020/06/11
- [PULL 025/115] hw/i386/vmport: Add reference to VMware open-vm-tools, Paolo Bonzini, 2020/06/11
- [PULL 017/115] hyperv: expose API to determine if synic is enabled, Paolo Bonzini, 2020/06/11
- [PULL 014/115] qom/object: Move Object typedef to 'qemu/typedefs.h', Paolo Bonzini, 2020/06/11
- [PULL 066/115] x86/cpu: Enable AVX512_VP2INTERSECT cpu feature, Paolo Bonzini, 2020/06/11
- [PULL 067/115] vfio/pci: Use kvm_irqchip_add_irqfd_notifier_gsi() for irqfds, Paolo Bonzini, 2020/06/11
- [PULL 035/115] hw/i386/vmport: Allow x2apic without IR, Paolo Bonzini, 2020/06/11