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payload: Add tso=1 m1n1 option to enable TSO

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Signed-off-by: Asahi Lina <lina@asahilina.net>
This commit is contained in:
Asahi Lina 2023-03-22 17:32:53 +09:00 committed by Hector Martin
parent 0a05a0171e
commit fa3dcd3e77
1 changed files with 22 additions and 0 deletions
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22
src/payload.c
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@ -155,6 +155,8 @@ static void *load_kernel(void *p, size_t size)
static size_t chosen_cnt = 0;
static char *chosen[MAX_CHOSEN_VARS];
static bool enable_tso = false;
static bool check_var(u8 **p)
{
char *val = memchr(*p, '=', strnlen((char *)*p, MAX_VAR_NAME + 1));
@ -179,6 +181,8 @@ static bool check_var(u8 **p)
chainload_spec = val;
} else if (IS_VAR("display=")) {
display_configure(val);
} else if (IS_VAR("tso=")) {
enable_tso = val[0] == '1';
} else {
printf("Unknown variable %s\n", *p);
}
@ -226,6 +230,13 @@ static void *load_one_payload(void *start, size_t size)
}
}
void do_enable_tso(void)
{
u64 actlr = mrs(ACTLR_EL1);
actlr |= BIT(1); // Enable TSO
msr(ACTLR_EL1, actlr);
}
int payload_run(void)
{
const char *target = adt_getprop(adt, 0, "target-type", NULL);
@ -255,6 +266,17 @@ int payload_run(void)
if (kernel && fdt) {
smp_start_secondaries();
if (enable_tso) {
do_enable_tso();
for (int i = 1; i < MAX_CPUS; i++) {
if (smp_is_alive(i)) {
smp_call0(i, do_enable_tso);
smp_wait(i);
}
}
kboot_set_chosen("apple,tso", "");
}
for (size_t i = 0; i < chosen_cnt; i++) {
char *val = memchr(chosen[i], '=', MAX_VAR_NAME + 1);