This command is used by guest to gettimeofday() from host. See usage example in open-vm-tools TimeSyncReadHost() function.
Reviewed-by: Nikita Leshenko <nikita.leshche...@oracle.com> Signed-off-by: Liran Alon <liran.a...@oracle.com> --- hw/i386/vmport.c | 21 +++++++++++++++++++++ include/hw/i386/pc.h | 1 + 2 files changed, 22 insertions(+) diff --git a/hw/i386/vmport.c b/hw/i386/vmport.c index 7687f3368a55..21253933215b 100644 --- a/hw/i386/vmport.c +++ b/hw/i386/vmport.c @@ -53,6 +53,7 @@ typedef struct VMPortState { uint32_t vmx_version; uint8_t vmx_type; + uint32_t max_time_lag_us; } VMPortState; static VMPortState *port_state; @@ -142,6 +143,20 @@ static uint32_t vmport_cmd_ram_size(void *opaque, uint32_t addr) return ram_size; } +static uint32_t vmport_cmd_time(void *opaque, uint32_t addr) +{ + X86CPU *cpu = X86_CPU(current_cpu); + qemu_timeval tv; + + if (qemu_gettimeofday(&tv) < 0) { + return UINT32_MAX; + } + + cpu->env.regs[R_EBX] = (uint32_t)tv.tv_usec; + cpu->env.regs[R_ECX] = port_state->max_time_lag_us; + return (uint32_t)tv.tv_sec; +} + /* vmmouse helpers */ void vmmouse_get_data(uint32_t *data) { @@ -186,6 +201,7 @@ static void vmport_realizefn(DeviceState *dev, Error **errp) vmport_register(VMPORT_CMD_GETVERSION, vmport_cmd_get_version, NULL); vmport_register(VMPORT_CMD_GETBIOSUUID, vmport_cmd_get_bios_uuid, NULL); vmport_register(VMPORT_CMD_GETRAMSIZE, vmport_cmd_ram_size, NULL); + vmport_register(VMPORT_CMD_GETTIME, vmport_cmd_time, NULL); } static Property vmport_properties[] = { @@ -193,6 +209,11 @@ static Property vmport_properties[] = { DEFINE_PROP_UINT32("vmx-version", VMPortState, vmx_version, 6), DEFINE_PROP_UINT8("vmx-type", VMPortState, vmx_type, VMX_TYPE_SCALABLE_SERVER), + /* + * Max amount of time lag that can go uncorrected. + * Value taken from VMware Workstation 5.5. + **/ + DEFINE_PROP_UINT32("max-time-lag", VMPortState, max_time_lag_us, 1000000), DEFINE_PROP_END_OF_LIST(), }; diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h index ea87eb93511e..3ab3541b3a90 100644 --- a/include/hw/i386/pc.h +++ b/include/hw/i386/pc.h @@ -142,6 +142,7 @@ typedef enum { VMPORT_CMD_GETVERSION = 10, VMPORT_CMD_GETBIOSUUID = 19, VMPORT_CMD_GETRAMSIZE = 20, + VMPORT_CMD_GETTIME = 23, VMPORT_CMD_VMMOUSE_DATA = 39, VMPORT_CMD_VMMOUSE_STATUS = 40, VMPORT_CMD_VMMOUSE_COMMAND = 41, -- 2.20.1