diff options
| author | Jacob Garber <jgarber1@ualberta.ca> | 2019-05-14 11:21:41 -0600 |
|---|---|---|
| committer | Stefan Reinauer <stefan.reinauer@coreboot.org> | 2019-05-16 18:08:50 +0000 |
| commit | bc674765a93bc5c9bf2c20ce2444389dccc754e1 (patch) | |
| tree | b363bda561b009f204ff3580f68afe318aead52b /src/cpu/x86 | |
| parent | 2e8188aa13b84f607fd3a1e95fb7b63b26ff1d89 (diff) | |
{arch,cpu}/x86, drivers/intel: Restore cpu_index error handling
Previously cpu_index() always succeeded, but since commit 095c931
(src/arch/x86: Use core apic id to get cpu_index()) it is now possible
for it to indicate an error by returning -1. This commit adds error
handling for all calls to cpu_index(), and restores several checks that
were removed in commit 7c712bb (Fix code that would trip -Wtype-limits)
but are now needed.
Signed-off-by: Jacob Garber <jgarber1@ualberta.ca>
Change-Id: I5436eed4cb5675f916924eb9670db04592a8b927
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32795
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Diffstat (limited to 'src/cpu/x86')
| -rw-r--r-- | src/cpu/x86/mp_init.c | 15 | ||||
| -rw-r--r-- | src/cpu/x86/pae/pgtbl.c | 4 |
2 files changed, 16 insertions, 3 deletions
diff --git a/src/cpu/x86/mp_init.c b/src/cpu/x86/mp_init.c index 8957515540..b7b8fe2afa 100644 --- a/src/cpu/x86/mp_init.c +++ b/src/cpu/x86/mp_init.c @@ -870,13 +870,20 @@ static int run_ap_work(struct mp_callback *val, long expire_us) int i; int cpus_accepted; struct stopwatch sw; - int cur_cpu = cpu_index(); + int cur_cpu; if (!CONFIG(PARALLEL_MP_AP_WORK)) { printk(BIOS_ERR, "APs already parked. PARALLEL_MP_AP_WORK not selected.\n"); return -1; } + cur_cpu = cpu_index(); + + if (cur_cpu < 0) { + printk(BIOS_ERR, "Invalid CPU index.\n"); + return -1; + } + /* Signal to all the APs to run the func. */ for (i = 0; i < ARRAY_SIZE(ap_callbacks); i++) { if (cur_cpu == i) @@ -918,6 +925,12 @@ static void ap_wait_for_instruction(void) return; cur_cpu = cpu_index(); + + if (cur_cpu < 0) { + printk(BIOS_ERR, "Invalid CPU index.\n"); + return; + } + per_cpu_slot = &ap_callbacks[cur_cpu]; while (1) { diff --git a/src/cpu/x86/pae/pgtbl.c b/src/cpu/x86/pae/pgtbl.c index 062ee402f1..9c921342f1 100644 --- a/src/cpu/x86/pae/pgtbl.c +++ b/src/cpu/x86/pae/pgtbl.c @@ -116,12 +116,12 @@ void *map_2M_page(unsigned long page) static struct pg_table pgtbl[CONFIG_MAX_CPUS] __attribute__((aligned(4096))); static unsigned long mapped_window[CONFIG_MAX_CPUS]; - unsigned long index; + int index; unsigned long window; void *result; int i; index = cpu_index(); - if (index >= CONFIG_MAX_CPUS) + if (index < 0) return MAPPING_ERROR; window = page >> 10; if (window != mapped_window[index]) { |