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hw/i386/pc: Do pc_cmos_init_late() from pc_machine_done() 

In the i386 PC machine, we want to run the pc_cmos_init_late()
function only once the IDE and floppy drive devices have been set up.
We currently do this using qemu_register_reset(), and then have the
function call qemu_unregister_reset() on itself, so it runs exactly
once.

This was an expedient way to do it back in 2010 when we first added
this (in commit c0897e0cb9), but now we have a more obvious point
to do "machine initialization that has to happen after generic device
init": the machine-init-done hook.

Do the pc_cmos_init_late() work from our existing PC machine init
done hook function, so we can drop the use of qemu_register_reset()
and qemu_unregister_reset().

Because the pointers to the devices we need (the IDE buses and the
RTC) are now all in the machine state, we don't need the
pc_cmos_init_late_arg struct and can just pass the PCMachineState
pointer.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20240220160622.114437-3-peter.maydell@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
This commit is contained in:
Peter Maydell 2024-02-20 16:06:14 +00:00 committed by Philippe Mathieu-Daudé
parent 2df87da190
commit 859eb5eeb4
1 changed files with 16 additions and 23 deletions
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39
hw/i386/pc.c
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@ -465,11 +465,6 @@ static void pc_cmos_init_floppy(MC146818RtcState *rtc_state, ISADevice *floppy)
mc146818rtc_set_cmos_data(rtc_state, REG_EQUIPMENT_BYTE, val);
}
typedef struct pc_cmos_init_late_arg {
MC146818RtcState *rtc_state;
BusState *idebus[2];
} pc_cmos_init_late_arg;
typedef struct check_fdc_state {
ISADevice *floppy;
bool multiple;
@ -530,23 +525,25 @@ static ISADevice *pc_find_fdc0(void)
return state.floppy;
}
static void pc_cmos_init_late(void *opaque)
static void pc_cmos_init_late(PCMachineState *pcms)
{
pc_cmos_init_late_arg *arg = opaque;
MC146818RtcState *s = arg->rtc_state;
X86MachineState *x86ms = X86_MACHINE(pcms);
MC146818RtcState *s = MC146818_RTC(x86ms->rtc);
int16_t cylinders;
int8_t heads, sectors;
int val;
int i, trans;
val = 0;
if (arg->idebus[0] && ide_get_geometry(arg->idebus[0], 0,
&cylinders, &heads, &sectors) >= 0) {
if (pcms->idebus[0] &&
ide_get_geometry(pcms->idebus[0], 0,
&cylinders, &heads, &sectors) >= 0) {
cmos_init_hd(s, 0x19, 0x1b, cylinders, heads, sectors);
val |= 0xf0;
}
if (arg->idebus[0] && ide_get_geometry(arg->idebus[0], 1,
&cylinders, &heads, &sectors) >= 0) {
if (pcms->idebus[0] &&
ide_get_geometry(pcms->idebus[0], 1,
&cylinders, &heads, &sectors) >= 0) {
cmos_init_hd(s, 0x1a, 0x24, cylinders, heads, sectors);
val |= 0x0f;
}
@ -558,10 +555,11 @@ static void pc_cmos_init_late(void *opaque)
geometry. It is always such that: 1 <= sects <= 63, 1
<= heads <= 16, 1 <= cylinders <= 16383. The BIOS
geometry can be different if a translation is done. */
if (arg->idebus[i / 2] &&
ide_get_geometry(arg->idebus[i / 2], i % 2,
BusState *idebus = pcms->idebus[i / 2];
if (idebus &&
ide_get_geometry(idebus, i % 2,
&cylinders, &heads, &sectors) >= 0) {
trans = ide_get_bios_chs_trans(arg->idebus[i / 2], i % 2) - 1;
trans = ide_get_bios_chs_trans(idebus, i % 2) - 1;
assert((trans & ~3) == 0);
val |= trans << (i * 2);
}
@ -569,15 +567,12 @@ static void pc_cmos_init_late(void *opaque)
mc146818rtc_set_cmos_data(s, 0x39, val);
pc_cmos_init_floppy(s, pc_find_fdc0());
qemu_unregister_reset(pc_cmos_init_late, opaque);
}
void pc_cmos_init(PCMachineState *pcms,
ISADevice *rtc)
{
int val;
static pc_cmos_init_late_arg arg;
X86MachineState *x86ms = X86_MACHINE(pcms);
MC146818RtcState *s = MC146818_RTC(rtc);
@ -631,11 +626,7 @@ void pc_cmos_init(PCMachineState *pcms,
val |= 0x04; /* PS/2 mouse installed */
mc146818rtc_set_cmos_data(s, REG_EQUIPMENT_BYTE, val);
/* hard drives and FDC */
arg.rtc_state = s;
arg.idebus[0] = pcms->idebus[0];
arg.idebus[1] = pcms->idebus[1];
qemu_register_reset(pc_cmos_init_late, &arg);
/* hard drives and FDC are handled by pc_cmos_init_late() */
}
static void handle_a20_line_change(void *opaque, int irq, int level)
@ -703,6 +694,8 @@ void pc_machine_done(Notifier *notifier, void *data)
/* update FW_CFG_NB_CPUS to account for -device added CPUs */
fw_cfg_modify_i16(x86ms->fw_cfg, FW_CFG_NB_CPUS, x86ms->boot_cpus);
}
pc_cmos_init_late(pcms);
}
void pc_guest_info_init(PCMachineState *pcms)