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hv_exc: Make IPI/IRQ/timer/PMC emulation storage per-CPU

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Signed-off-by: Hector Martin <marcan@marcan.st>
This commit is contained in:
Hector Martin 2021-09-15 23:26:14 +09:00
parent 290e851d98
commit 184a516367
1 changed files with 23 additions and 18 deletions
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41
src/hv_exc.c
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@ -17,10 +17,14 @@ extern spinlock_t bhl;
((op2) << ESR_ISS_MSR_OP2_SHIFT))
#define SYSREG_ISS(...) _SYSREG_ISS(__VA_ARGS__)
bool ipi_pending = false;
bool pmc_pending = false;
u64 pmc_irq_mode = 0;
static u64 exc_entry_pmcr0_cnt;
#define D_PERCPU(t, x) t x[MAX_CPUS]
#define PERCPU(x) x[mrs(TPIDR_EL2)]
D_PERCPU(static bool, ipi_pending);
D_PERCPU(static bool, pmc_pending);
D_PERCPU(static u64, pmc_irq_mode);
D_PERCPU(static u64, exc_entry_pmcr0_cnt);
void hv_exit_guest(void) __attribute__((noreturn));
@ -97,7 +101,7 @@ static void hv_update_fiq(void)
reg_set(SYS_IMP_APL_VM_TMR_FIQ_ENA_EL2, VM_TMR_FIQ_ENA_ENA_V);
}
fiq_pending |= ipi_pending || pmc_pending;
fiq_pending |= PERCPU(ipi_pending) || PERCPU(pmc_pending);
sysop("isb");
@ -166,20 +170,21 @@ static bool hv_handle_msr(u64 *regs, u64 iss)
SYSREG_PASS(SYS_IMP_APL_IPI_CR_EL1)
case SYSREG_ISS(SYS_IMP_APL_IPI_SR_EL1):
if (is_read)
regs[rt] = ipi_pending ? IPI_SR_PENDING : 0;
regs[rt] = PERCPU(ipi_pending) ? IPI_SR_PENDING : 0;
else if (regs[rt] & IPI_SR_PENDING)
ipi_pending = false;
PERCPU(ipi_pending) = false;
return true;
/* shadow the interrupt mode and state flag */
case SYSREG_ISS(SYS_IMP_APL_PMCR0):
if (is_read) {
u64 val = (mrs(SYS_IMP_APL_PMCR0) & ~PMCR0_IMODE_MASK) | pmc_irq_mode;
regs[rt] = val | (pmc_pending ? PMCR0_IACT : 0) | exc_entry_pmcr0_cnt;
u64 val = (mrs(SYS_IMP_APL_PMCR0) & ~PMCR0_IMODE_MASK) | PERCPU(pmc_irq_mode);
regs[rt] =
val | (PERCPU(pmc_pending) ? PMCR0_IACT : 0) | PERCPU(exc_entry_pmcr0_cnt);
} else {
pmc_pending = !!(regs[rt] & PMCR0_IACT);
pmc_irq_mode = regs[rt] & PMCR0_IMODE_MASK;
exc_entry_pmcr0_cnt = regs[rt] & PMCR0_CNT_MASK;
msr(SYS_IMP_APL_PMCR0, regs[rt] & ~exc_entry_pmcr0_cnt);
PERCPU(pmc_pending) = !!(regs[rt] & PMCR0_IACT);
PERCPU(pmc_irq_mode) = regs[rt] & PMCR0_IMODE_MASK;
PERCPU(exc_entry_pmcr0_cnt) = regs[rt] & PMCR0_CNT_MASK;
msr(SYS_IMP_APL_PMCR0, regs[rt] & ~PERCPU(exc_entry_pmcr0_cnt));
}
return true;
#ifdef DEBUG_PMU_IRQ
@ -211,7 +216,7 @@ static void hv_exc_entry(u64 *regs)
exc_entry_time = mrs(CNTPCT_EL0);
/* disable PMU counters in the hypervisor */
u64 pmcr0 = mrs(SYS_IMP_APL_PMCR0);
exc_entry_pmcr0_cnt = pmcr0 & PMCR0_CNT_MASK;
PERCPU(exc_entry_pmcr0_cnt) = pmcr0 & PMCR0_CNT_MASK;
msr(SYS_IMP_APL_PMCR0, pmcr0 & ~PMCR0_CNT_MASK);
}
@ -220,8 +225,8 @@ static void hv_exc_exit(u64 *regs)
UNUSED(regs);
hv_wdt_breadcrumb('x');
hv_update_fiq();
/* reenabale PMU counters */
reg_set(SYS_IMP_APL_PMCR0, exc_entry_pmcr0_cnt);
/* reenable PMU counters */
reg_set(SYS_IMP_APL_PMCR0, PERCPU(exc_entry_pmcr0_cnt));
u64 lost = mrs(CNTPCT_EL0) - exc_entry_time;
if (lost > 8)
stolen_time += lost - 8;
@ -298,7 +303,7 @@ void hv_exc_fiq(u64 *regs)
printf("[FIQ] PMC IRQ, masking and delivering to the guest\n");
#endif
reg_clr(SYS_IMP_APL_PMCR0, PMCR0_IACT | PMCR0_IMODE_MASK);
pmc_pending = true;
PERCPU(pmc_pending) = true;
}
reg = mrs(SYS_IMP_APL_UPMCR0);
@ -309,7 +314,7 @@ void hv_exc_fiq(u64 *regs)
}
if (mrs(SYS_IMP_APL_IPI_SR_EL1) & IPI_SR_PENDING) {
ipi_pending = true;
PERCPU(ipi_pending) = true;
msr(SYS_IMP_APL_IPI_SR_EL1, IPI_SR_PENDING);
sysop("isb");
}