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hw/intc/gic: RAZ/WI non-sec access to sec interrupts

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Treat non-secure accesses to registers and bits in registers of secure
interrupts as RAZ/WI.

Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Message-id: 1464273945-2055-1-git-send-email-jens.wiklander@linaro.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Jens Wiklander 2016-06-06 16:59:29 +01:00 committed by Peter Maydell
parent e40c3d2e7f
commit fea8a08e16
1 changed files with 62 additions and 6 deletions
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68
hw/intc/arm_gic.c
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@ -661,6 +661,11 @@ static uint32_t gic_dist_readb(void *opaque, hwaddr offset, MemTxAttrs attrs)
goto bad_reg;
res = 0;
for (i = 0; i < 8; i++) {
if (s->security_extn && !attrs.secure &&
!GIC_TEST_GROUP(irq + i, 1 << cpu)) {
continue; /* Ignore Non-secure access of Group0 IRQ */
}
if (GIC_TEST_ENABLED(irq + i, cm)) {
res |= (1 << i);
}
@ -677,6 +682,11 @@ static uint32_t gic_dist_readb(void *opaque, hwaddr offset, MemTxAttrs attrs)
res = 0;
mask = (irq < GIC_INTERNAL) ? cm : ALL_CPU_MASK;
for (i = 0; i < 8; i++) {
if (s->security_extn && !attrs.secure &&
!GIC_TEST_GROUP(irq + i, 1 << cpu)) {
continue; /* Ignore Non-secure access of Group0 IRQ */
}
if (gic_test_pending(s, irq + i, mask)) {
res |= (1 << i);
}
@ -689,6 +699,11 @@ static uint32_t gic_dist_readb(void *opaque, hwaddr offset, MemTxAttrs attrs)
res = 0;
mask = (irq < GIC_INTERNAL) ? cm : ALL_CPU_MASK;
for (i = 0; i < 8; i++) {
if (s->security_extn && !attrs.secure &&
!GIC_TEST_GROUP(irq + i, 1 << cpu)) {
continue; /* Ignore Non-secure access of Group0 IRQ */
}
if (GIC_TEST_ACTIVE(irq + i, mask)) {
res |= (1 << i);
}
@ -722,6 +737,11 @@ static uint32_t gic_dist_readb(void *opaque, hwaddr offset, MemTxAttrs attrs)
goto bad_reg;
res = 0;
for (i = 0; i < 4; i++) {
if (s->security_extn && !attrs.secure &&
!GIC_TEST_GROUP(irq + i, 1 << cpu)) {
continue; /* Ignore Non-secure access of Group0 IRQ */
}
if (GIC_TEST_MODEL(irq + i))
res |= (1 << (i * 2));
if (GIC_TEST_EDGE_TRIGGER(irq + i))
@ -742,7 +762,12 @@ static uint32_t gic_dist_readb(void *opaque, hwaddr offset, MemTxAttrs attrs)
/* GICD_SPENDSGIRn */
}
res = s->sgi_pending[irq][cpu];
if (s->security_extn && !attrs.secure &&
!GIC_TEST_GROUP(irq, 1 << cpu)) {
res = 0; /* Ignore Non-secure access of Group0 IRQ */
} else {
res = s->sgi_pending[irq][cpu];
}
} else if (offset < 0xfd0) {
goto bad_reg;
} else if (offset < 0x1000) {
@ -862,6 +887,11 @@ static void gic_dist_writeb(void *opaque, hwaddr offset,
(irq < GIC_INTERNAL) ? (1 << cpu) : GIC_TARGET(irq + i);
int cm = (irq < GIC_INTERNAL) ? (1 << cpu) : ALL_CPU_MASK;
if (s->security_extn && !attrs.secure &&
!GIC_TEST_GROUP(irq + i, 1 << cpu)) {
continue; /* Ignore Non-secure access of Group0 IRQ */
}
if (!GIC_TEST_ENABLED(irq + i, cm)) {
DPRINTF("Enabled IRQ %d\n", irq + i);
trace_gic_enable_irq(irq + i);
@ -889,6 +919,11 @@ static void gic_dist_writeb(void *opaque, hwaddr offset,
if (value & (1 << i)) {
int cm = (irq < GIC_INTERNAL) ? (1 << cpu) : ALL_CPU_MASK;
if (s->security_extn && !attrs.secure &&
!GIC_TEST_GROUP(irq + i, 1 << cpu)) {
continue; /* Ignore Non-secure access of Group0 IRQ */
}
if (GIC_TEST_ENABLED(irq + i, cm)) {
DPRINTF("Disabled IRQ %d\n", irq + i);
trace_gic_disable_irq(irq + i);
@ -907,6 +942,11 @@ static void gic_dist_writeb(void *opaque, hwaddr offset,
for (i = 0; i < 8; i++) {
if (value & (1 << i)) {
if (s->security_extn && !attrs.secure &&
!GIC_TEST_GROUP(irq + i, 1 << cpu)) {
continue; /* Ignore Non-secure access of Group0 IRQ */
}
GIC_SET_PENDING(irq + i, GIC_TARGET(irq + i));
}
}
@ -920,6 +960,11 @@ static void gic_dist_writeb(void *opaque, hwaddr offset,
}
for (i = 0; i < 8; i++) {
if (s->security_extn && !attrs.secure &&
!GIC_TEST_GROUP(irq + i, 1 << cpu)) {
continue; /* Ignore Non-secure access of Group0 IRQ */
}
/* ??? This currently clears the pending bit for all CPUs, even
for per-CPU interrupts. It's unclear whether this is the
corect behavior. */
@ -960,6 +1005,11 @@ static void gic_dist_writeb(void *opaque, hwaddr offset,
if (irq < GIC_NR_SGIS)
value |= 0xaa;
for (i = 0; i < 4; i++) {
if (s->security_extn && !attrs.secure &&
!GIC_TEST_GROUP(irq + i, 1 << cpu)) {
continue; /* Ignore Non-secure access of Group0 IRQ */
}
if (s->revision == REV_11MPCORE || s->revision == REV_NVIC) {
if (value & (1 << (i * 2))) {
GIC_SET_MODEL(irq + i);
@ -983,9 +1033,12 @@ static void gic_dist_writeb(void *opaque, hwaddr offset,
}
irq = (offset - 0xf10);
s->sgi_pending[irq][cpu] &= ~value;
if (s->sgi_pending[irq][cpu] == 0) {
GIC_CLEAR_PENDING(irq, 1 << cpu);
if (!s->security_extn || attrs.secure ||
GIC_TEST_GROUP(irq, 1 << cpu)) {
s->sgi_pending[irq][cpu] &= ~value;
if (s->sgi_pending[irq][cpu] == 0) {
GIC_CLEAR_PENDING(irq, 1 << cpu);
}
}
} else if (offset < 0xf30) {
/* GICD_SPENDSGIRn */
@ -994,8 +1047,11 @@ static void gic_dist_writeb(void *opaque, hwaddr offset,
}
irq = (offset - 0xf20);
GIC_SET_PENDING(irq, 1 << cpu);
s->sgi_pending[irq][cpu] |= value;
if (!s->security_extn || attrs.secure ||
GIC_TEST_GROUP(irq, 1 << cpu)) {
GIC_SET_PENDING(irq, 1 << cpu);
s->sgi_pending[irq][cpu] |= value;
}
} else {
goto bad_reg;
}