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hv_exc: Be a bit more paranoid handling IPIs

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Signed-off-by: Hector Martin <marcan@marcan.st>
This commit is contained in:
Hector Martin 2023-04-18 23:38:40 +09:00
parent b0c3f6d7ae
commit 587da648a3
1 changed files with 10 additions and 6 deletions
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16
src/hv_exc.c
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@ -289,21 +289,25 @@ static bool hv_handle_msr(struct exc_info *ctx, u64 iss)
case SYSREG_ISS(SYS_IMP_APL_IPI_RR_LOCAL_EL1): {
assert(!is_read);
u64 mpidr = (regs[rt] & 0xff) | (mrs(MPIDR_EL1) & 0xffff00);
msr(SYS_IMP_APL_IPI_RR_LOCAL_EL1, regs[rt]);
for (int i = 0; i < MAX_CPUS; i++)
if (mpidr == smp_get_mpidr(i))
if (mpidr == smp_get_mpidr(i)) {
pcpu[i].ipi_queued = true;
return true;
msr(SYS_IMP_APL_IPI_RR_LOCAL_EL1, regs[rt]);
return true;
}
return false;
}
case SYSREG_ISS(SYS_IMP_APL_IPI_RR_GLOBAL_EL1):
assert(!is_read);
u64 mpidr = (regs[rt] & 0xff) | ((regs[rt] & 0xff0000) >> 8);
msr(SYS_IMP_APL_IPI_RR_GLOBAL_EL1, regs[rt]);
for (int i = 0; i < MAX_CPUS; i++) {
if (mpidr == (smp_get_mpidr(i) & 0xffff))
if (mpidr == (smp_get_mpidr(i) & 0xffff)) {
pcpu[i].ipi_queued = true;
msr(SYS_IMP_APL_IPI_RR_GLOBAL_EL1, regs[rt]);
return true;
}
}
return true;
return false;
case SYSREG_ISS(SYS_IMP_APL_IPI_SR_EL1):
if (is_read)
regs[rt] = PERCPU(ipi_pending) ? IPI_SR_PENDING : 0;