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arm64: g_mpu_region need support SMP

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Convert g_mpu_region from single-CPU global variable to per-CPU array indexed
by this_cpu(). Change declaration from "unsigned int g_mpu_region" to
"unsigned int g_mpu_region[CONFIG_SMP_NCPUS]". Update all accesses in
mpu_allocregion(), mpu_freeregion(), and mpu_modify_region() to use
g_mpu_region[this_cpu()] for proper per-CPU MPU region tracking in multi-core
configurations.

Signed-off-by: hujun5 <hujun5@xiaomi.com>
This commit is contained in:
hujun5
2025-04-27 11:48:13 +08:00
committed by Xiang Xiao
parent ffb4c101d8
commit ad3abcd277
1 changed files with 5 additions and 5 deletions
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arch/arm64/src/common/arm64_mpu.c
+5 -5
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@@ -73,7 +73,7 @@
* regions.
*/
static unsigned int g_mpu_region;
static unsigned int g_mpu_region[CONFIG_SMP_NCPUS];
/****************************************************************************
* Private Functions
@@ -153,12 +153,12 @@ static void mpu_init(void)
unsigned int mpu_allocregion(void)
{
unsigned int num_regions = get_num_regions();
unsigned int i = ffs(~g_mpu_region) - 1;
unsigned int i = ffs(~g_mpu_region[this_cpu()]) - 1;
/* There are not enough regions to apply */
DEBUGASSERT(i < num_regions);
g_mpu_region |= 1 << i;
g_mpu_region[this_cpu()] |= 1 << i;
return i;
}
@@ -191,7 +191,7 @@ void mpu_freeregion(unsigned int region)
write_sysreg(0, prbar_el1);
write_sysreg(0, prlar_el1);
g_mpu_region &= ~(1 << region);
g_mpu_region[this_cpu()] &= ~(1 << region);
UP_MB();
}
@@ -275,7 +275,7 @@ void mpu_modify_region(unsigned int region,
/* Check that the region is valid */
DEBUGASSERT(g_mpu_region & (1 << region));
DEBUGASSERT(g_mpu_region[this_cpu()] & (1 << region));
rbar |= table->attr.rbar &
(MPU_RBAR_XN_MSK | MPU_RBAR_AP_MSK | MPU_RBAR_SH_MSK);