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[PATCH v2 15/16] hw/i386/vmport: Add support for CMD_GETHZ
From: |
Liran Alon |
Subject: |
[PATCH v2 15/16] hw/i386/vmport: Add support for CMD_GETHZ |
Date: |
Tue, 10 Mar 2020 18:53:31 +0200 |
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 <address@hidden>
Signed-off-by: Liran Alon <address@hidden>
---
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 6ca03273066e..76fd49c52058 100644
--- a/hw/i386/vmport.c
+++ b/hw/i386/vmport.c
@@ -165,6 +165,24 @@ 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_time(void *opaque, uint32_t addr)
{
X86CPU *cpu = X86_CPU(current_cpu);
@@ -254,6 +272,7 @@ static void vmport_realizefn(DeviceState *dev, Error **errp)
if (s->version > 1) {
vmport_register(VMPORT_CMD_GETBIOSUUID, vmport_cmd_get_bios_uuid,
NULL);
vmport_register(VMPORT_CMD_GETTIME, vmport_cmd_time, NULL);
+ vmport_register(VMPORT_CMD_GETHZ, vmport_cmd_get_hz, NULL);
vmport_register(VMPORT_CMD_GETTIMEFULL, vmport_cmd_time_full, 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 34cc050b1ffa..aee809521aa0 100644
--- a/include/hw/i386/vmport.h
+++ b/include/hw/i386/vmport.h
@@ -12,6 +12,7 @@ typedef enum {
VMPORT_CMD_VMMOUSE_DATA = 39,
VMPORT_CMD_VMMOUSE_STATUS = 40,
VMPORT_CMD_VMMOUSE_COMMAND = 41,
+ VMPORT_CMD_GETHZ = 45,
VMPORT_CMD_GETTIMEFULL = 46,
VMPORT_CMD_GET_VCPU_INFO = 68,
VMPORT_ENTRIES
--
2.20.1
- [PATCH v2 03/16] hw/i386/vmport: Propagate IOPort read to vCPU EAX register, (continued)
- [PATCH v2 03/16] hw/i386/vmport: Propagate IOPort read to vCPU EAX register, Liran Alon, 2020/03/10
- [PATCH v2 05/16] hw/i386/vmport: Introduce vmx-version property, Liran Alon, 2020/03/10
- [PATCH v2 06/16] hw/i386/vmport: Report VMX type in CMD_GETVERSION, Liran Alon, 2020/03/10
- [PATCH v2 07/16] hw/i386/vmport: Introduce vmport.h, Liran Alon, 2020/03/10
- [PATCH v2 09/16] hw/i386/vmport: Add support for CMD_GETBIOSUUID, Liran Alon, 2020/03/10
- [PATCH v2 10/16] hw/i386/vmport: Add support for CMD_GETTIME, Liran Alon, 2020/03/10
- [PATCH v2 11/16] hw/i386/vmport: Add support for CMD_GETTIMEFULL, Liran Alon, 2020/03/10
- [PATCH v2 12/16] hw/i386/vmport: Add support for CMD_GET_VCPU_INFO, Liran Alon, 2020/03/10
- [PATCH v2 13/16] hw/i386/vmport: Allow x2apic without IR, Liran Alon, 2020/03/10
- [PATCH v2 14/16] i386/cpu: Store LAPIC bus frequency in CPU structure, Liran Alon, 2020/03/10
- [PATCH v2 15/16] hw/i386/vmport: Add support for CMD_GETHZ,
Liran Alon <=
- [PATCH v2 16/16] hw/i386/vmport: Assert vmport initialized before registering commands, Liran Alon, 2020/03/10
- [PATCH v2 08/16] hw/i386/vmport: Define enum for all commands, Liran Alon, 2020/03/10
- Re: [PATCH v2 00/16]: hw/i386/vmport: Bug fixes and improvements, Michael S. Tsirkin, 2020/03/10
- Re: [PATCH v2 00/16]: hw/i386/vmport: Bug fixes and improvements, Liran Alon, 2020/03/10
- Re: [PATCH v2 00/16]: hw/i386/vmport: Bug fixes and improvements, Michael S. Tsirkin, 2020/03/10
- Re: [PATCH v2 00/16]: hw/i386/vmport: Bug fixes and improvements, Liran Alon, 2020/03/10
- Re: [PATCH v2 00/16]: hw/i386/vmport: Bug fixes and improvements, Michael S. Tsirkin, 2020/03/10
- Re: [PATCH v2 00/16]: hw/i386/vmport: Bug fixes and improvements, Liran Alon, 2020/03/10
- Re: [PATCH v2 00/16]: hw/i386/vmport: Bug fixes and improvements, Michael S. Tsirkin, 2020/03/10
- Re: [PATCH v2 00/16]: hw/i386/vmport: Bug fixes and improvements, Liran Alon, 2020/03/10