[PULL 00/39] target-arm queue

[PULL 00/39] target-arm queue

[Peter Maydell]

The following changes since commit 55ef0b702bc2c90c3c4ed97f97676d8f139e5ca1:

  Merge remote-tracking branch 'remotes/lvivier-gitlab/tags/linux-user-for-7.0-pull-request' into staging (2022-02-07 10:48:25 +0000)

are available in the Git repository at:

  https://git.linaro.org/people/pmaydell/qemu-arm.git tags/pull-target-arm-20220208

for you to fetch changes up to 4fd1ebb10593087d45d2f56f7f3d13447d24802c:

  hw/sensor: Add lsm303dlhc magnetometer device (2022-02-08 10:56:29 +0000)

----------------------------------------------------------------
target-arm queue:
 * Fix handling of SVE ZCR_LEN when using VHE
 * xlnx-zynqmp: 'Or' the QSPI / QSPI DMA IRQs
 * Don't ever enable PSCI when booting guest in EL3
 * Adhere to SMCCC 1.3 section 5.2
 * highbank: Fix issues with booting SMP
 * midway: Fix issues booting at all
 * boot: Drop existing dtb /psci node rather than retaining it
 * versal-virt: Always call arm_load_kernel()
 * force flag recalculation when messing with DAIF
 * hw/timer/armv7m_systick: Update clock source before enabling timer
 * hw/arm/smmuv3: Fix device reset
 * hw/intc/arm_gicv3_its: refactorings and minor bug fixes
 * hw/sensor: Add lsm303dlhc magnetometer device

----------------------------------------------------------------
Alex Bennée (1):
      arm: force flag recalculation when messing with DAIF

Edgar E. Iglesias (1):
      hw/arm: versal-virt: Always call arm_load_kernel()

Eric Auger (1):
      hw/arm/smmuv3: Fix device reset

Francisco Iglesias (1):
      hw/arm/xlnx-zynqmp: 'Or' the QSPI / QSPI DMA IRQs

Kevin Townsend (1):
      hw/sensor: Add lsm303dlhc magnetometer device

Peter Maydell (29):
      target/arm: make psci-conduit settable after realize
      cpu.c: Make start-powered-off settable after realize
      hw/arm/boot: Support setting psci-conduit based on guest EL
      hw/arm: imx: Don't enable PSCI conduit when booting guest in EL3
      hw/arm: allwinner: Don't enable PSCI conduit when booting guest in EL3
      hw/arm/xlnx-zcu102: Don't enable PSCI conduit when booting guest in EL3
      hw/arm/versal: Let boot.c handle PSCI enablement
      hw/arm/virt: Let boot.c handle PSCI enablement
      hw/arm: highbank: For EL3 guests, don't enable PSCI, start all cores
      arm: tcg: Adhere to SMCCC 1.3 section 5.2
      hw/arm/highbank: Drop use of secure_board_setup
      hw/arm/boot: Prevent setting both psci_conduit and secure_board_setup
      hw/arm/boot: Don't write secondary boot stub if using PSCI
      hw/arm/highbank: Drop unused secondary boot stub code
      hw/arm/boot: Drop nb_cpus field from arm_boot_info
      hw/arm/boot: Drop existing dtb /psci node rather than retaining it
      hw/intc/arm_gicv3_its: Use address_space_map() to access command queue packets
      hw/intc/arm_gicv3_its: Keep DTEs as a struct, not a raw uint64_t
      hw/intc/arm_gicv3_its: Pass DTEntry to update_dte()
      hw/intc/arm_gicv3_its: Keep CTEs as a struct, not a raw uint64_t
      hw/intc/arm_gicv3_its: Pass CTEntry to update_cte()
      hw/intc/arm_gicv3_its: Fix address calculation in get_ite() and update_ite()
      hw/intc/arm_gicv3_its: Avoid nested ifs in get_ite()
      hw/intc/arm_gicv3_its: Pass ITE values back from get_ite() via a struct
      hw/intc/arm_gicv3_its: Make update_ite() use ITEntry
      hw/intc/arm_gicv3_its: Drop TableDesc and CmdQDesc valid fields
      hw/intc/arm_gicv3_its: In MAPC with V=0, don't check rdbase field
      hw/intc/arm_gicv3_its: Don't allow intid 1023 in MAPI/MAPTI
      hw/intc/arm_gicv3_its: Split error checks

Richard Henderson (4):
      target/arm: Fix sve_zcr_len_for_el for VHE mode running
      target/arm: Tidy sve_exception_el for CPACR_EL1 access
      target/arm: Fix {fp, sve}_exception_el for VHE mode running
      target/arm: Use CPTR_TFP with CPTR_EL3 in fp_exception_el

Richard Petri (1):
      hw/timer/armv7m_systick: Update clock source before enabling timer

 hw/intc/gicv3_internal.h               |  23 +-
 include/hw/arm/boot.h                  |  14 +-
 include/hw/arm/xlnx-versal.h           |   1 -
 include/hw/arm/xlnx-zynqmp.h           |   2 +
 include/hw/intc/arm_gicv3_its_common.h |   2 -
 cpu.c                                  |  22 +-
 hw/arm/allwinner-h3.c                  |   9 +-
 hw/arm/aspeed.c                        |   1 -
 hw/arm/boot.c                          | 107 ++++-
 hw/arm/exynos4_boards.c                |   1 -
 hw/arm/fsl-imx6ul.c                    |   2 -
 hw/arm/fsl-imx7.c                      |   8 +-
 hw/arm/highbank.c                      |  72 +---
 hw/arm/imx25_pdk.c                     |   3 +-
 hw/arm/kzm.c                           |   1 -
 hw/arm/mcimx6ul-evk.c                  |   2 +-
 hw/arm/mcimx7d-sabre.c                 |   2 +-
 hw/arm/npcm7xx.c                       |   3 -
 hw/arm/orangepi.c                      |   5 +-
 hw/arm/raspi.c                         |   1 -
 hw/arm/realview.c                      |   1 -
 hw/arm/sabrelite.c                     |   1 -
 hw/arm/sbsa-ref.c                      |   1 -
 hw/arm/smmuv3.c                        |   6 +
 hw/arm/vexpress.c                      |   1 -
 hw/arm/virt.c                          |  13 +-
 hw/arm/xilinx_zynq.c                   |   1 -
 hw/arm/xlnx-versal-virt.c              |  17 +-
 hw/arm/xlnx-versal.c                   |   5 +-
 hw/arm/xlnx-zcu102.c                   |   1 +
 hw/arm/xlnx-zynqmp.c                   |  25 +-
 hw/intc/arm_gicv3_its.c                | 696 +++++++++++++++------------------
 hw/sensor/lsm303dlhc_mag.c             | 556 ++++++++++++++++++++++++++
 hw/timer/armv7m_systick.c              |   8 +-
 target/arm/cpu.c                       |   6 +-
 target/arm/helper-a64.c                |   2 +
 target/arm/helper.c                    | 118 ++++--
 target/arm/psci.c                      |  35 +-
 tests/qtest/lsm303dlhc-mag-test.c      | 148 +++++++
 hw/sensor/Kconfig                      |   4 +
 hw/sensor/meson.build                  |   1 +
 tests/qtest/meson.build                |   1 +
 42 files changed, 1308 insertions(+), 620 deletions(-)
 create mode 100644 hw/sensor/lsm303dlhc_mag.c
 create mode 100644 tests/qtest/lsm303dlhc-mag-test.c

[PULL 01/39] target/arm: Fix sve_zcr_len_for_el for VHE mode running

[Peter Maydell]

From: Richard Henderson <richard.henderson@linaro.org>

When HCR_EL2.{E2H,TGE} == '11', ZCR_EL1 is unused.

Reported-by: Zenghui Yu <yuzenghui@huawei.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Zenghui Yu <yuzenghui@huawei.com>
Message-id: 20220127063428.30212-2-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/helper.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/target/arm/helper.c b/target/arm/helper.c
index 6dd241fbef3..649958a727d 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -6225,7 +6225,8 @@ uint32_t sve_zcr_len_for_el(CPUARMState *env, int el)
     ARMCPU *cpu = env_archcpu(env);
     uint32_t zcr_len = cpu->sve_max_vq - 1;
 
-    if (el <= 1) {
+    if (el <= 1 &&
+        (arm_hcr_el2_eff(env) & (HCR_E2H | HCR_TGE)) != (HCR_E2H | HCR_TGE)) {
         zcr_len = MIN(zcr_len, 0xf & (uint32_t)env->vfp.zcr_el[1]);
     }
     if (el <= 2 && arm_feature(env, ARM_FEATURE_EL2)) {
-- 
2.25.1

[PULL 02/39] target/arm: Tidy sve_exception_el for CPACR_EL1 access

[Peter Maydell]

From: Richard Henderson <richard.henderson@linaro.org>

Extract entire fields for ZEN and FPEN, rather than testing specific bits.
This makes it easier to follow the code versus the ARM spec.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Zenghui Yu <yuzenghui@huawei.com>
Message-id: 20220127063428.30212-3-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/helper.c | 36 +++++++++++++++++-------------------
 1 file changed, 17 insertions(+), 19 deletions(-)

diff --git a/target/arm/helper.c b/target/arm/helper.c
index 649958a727d..e474ab2e1de 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -6154,30 +6154,28 @@ int sve_exception_el(CPUARMState *env, int el)
     uint64_t hcr_el2 = arm_hcr_el2_eff(env);
 
     if (el <= 1 && (hcr_el2 & (HCR_E2H | HCR_TGE)) != (HCR_E2H | HCR_TGE)) {
-        bool disabled = false;
-
-        /* The CPACR.ZEN controls traps to EL1:
-         * 0, 2 : trap EL0 and EL1 accesses
-         * 1    : trap only EL0 accesses
-         * 3    : trap no accesses
-         */
-        if (!extract32(env->cp15.cpacr_el1, 16, 1)) {
-            disabled = true;
-        } else if (!extract32(env->cp15.cpacr_el1, 17, 1)) {
-            disabled = el == 0;
-        }
-        if (disabled) {
+        /* Check CPACR.ZEN.  */
+        switch (extract32(env->cp15.cpacr_el1, 16, 2)) {
+        case 1:
+            if (el != 0) {
+                break;
+            }
+            /* fall through */
+        case 0:
+        case 2:
             /* route_to_el2 */
             return hcr_el2 & HCR_TGE ? 2 : 1;
         }
 
         /* Check CPACR.FPEN.  */
-        if (!extract32(env->cp15.cpacr_el1, 20, 1)) {
-            disabled = true;
-        } else if (!extract32(env->cp15.cpacr_el1, 21, 1)) {
-            disabled = el == 0;
-        }
-        if (disabled) {
+        switch (extract32(env->cp15.cpacr_el1, 20, 2)) {
+        case 1:
+            if (el != 0) {
+                break;
+            }
+            /* fall through */
+        case 0:
+        case 2:
             return 0;
         }
     }
-- 
2.25.1

[PULL 03/39] target/arm: Fix {fp, sve}_exception_el for VHE mode running

[Peter Maydell]

From: Richard Henderson <richard.henderson@linaro.org>

When HCR_EL2.E2H is set, the format of CPTR_EL2 changes to
look more like CPACR_EL1, with ZEN and FPEN fields instead
of TZ and TFP fields.

Reported-by: Zenghui Yu <yuzenghui@huawei.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220127063428.30212-4-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/helper.c | 77 +++++++++++++++++++++++++++++++++++----------
 1 file changed, 60 insertions(+), 17 deletions(-)

diff --git a/target/arm/helper.c b/target/arm/helper.c
index e474ab2e1de..83bbb446e70 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -6180,15 +6180,41 @@ int sve_exception_el(CPUARMState *env, int el)
         }
     }
 
-    /* CPTR_EL2.  Since TZ and TFP are positive,
-     * they will be zero when EL2 is not present.
+    /*
+     * CPTR_EL2 changes format with HCR_EL2.E2H (regardless of TGE).
      */
-    if (el <= 2 && arm_is_el2_enabled(env)) {
-        if (env->cp15.cptr_el[2] & CPTR_TZ) {
-            return 2;
-        }
-        if (env->cp15.cptr_el[2] & CPTR_TFP) {
-            return 0;
+    if (el <= 2) {
+        if (hcr_el2 & HCR_E2H) {
+            /* Check CPTR_EL2.ZEN.  */
+            switch (extract32(env->cp15.cptr_el[2], 16, 2)) {
+            case 1:
+                if (el != 0 || !(hcr_el2 & HCR_TGE)) {
+                    break;
+                }
+                /* fall through */
+            case 0:
+            case 2:
+                return 2;
+            }
+
+            /* Check CPTR_EL2.FPEN.  */
+            switch (extract32(env->cp15.cptr_el[2], 20, 2)) {
+            case 1:
+                if (el == 2 || !(hcr_el2 & HCR_TGE)) {
+                    break;
+                }
+                /* fall through */
+            case 0:
+            case 2:
+                return 0;
+            }
+        } else if (arm_is_el2_enabled(env)) {
+            if (env->cp15.cptr_el[2] & CPTR_TZ) {
+                return 2;
+            }
+            if (env->cp15.cptr_el[2] & CPTR_TFP) {
+                return 0;
+            }
         }
     }
 
@@ -12912,6 +12938,8 @@ uint32_t HELPER(crc32c)(uint32_t acc, uint32_t val, uint32_t bytes)
 int fp_exception_el(CPUARMState *env, int cur_el)
 {
 #ifndef CONFIG_USER_ONLY
+    uint64_t hcr_el2;
+
     /* CPACR and the CPTR registers don't exist before v6, so FP is
      * always accessible
      */
@@ -12935,13 +12963,15 @@ int fp_exception_el(CPUARMState *env, int cur_el)
         return 0;
     }
 
+    hcr_el2 = arm_hcr_el2_eff(env);
+
     /* The CPACR controls traps to EL1, or PL1 if we're 32 bit:
      * 0, 2 : trap EL0 and EL1/PL1 accesses
      * 1    : trap only EL0 accesses
      * 3    : trap no accesses
      * This register is ignored if E2H+TGE are both set.
      */
-    if ((arm_hcr_el2_eff(env) & (HCR_E2H | HCR_TGE)) != (HCR_E2H | HCR_TGE)) {
+    if ((hcr_el2 & (HCR_E2H | HCR_TGE)) != (HCR_E2H | HCR_TGE)) {
         int fpen = extract32(env->cp15.cpacr_el1, 20, 2);
 
         switch (fpen) {
@@ -12982,15 +13012,28 @@ int fp_exception_el(CPUARMState *env, int cur_el)
         }
     }
 
-    /* For the CPTR registers we don't need to guard with an ARM_FEATURE
-     * check because zero bits in the registers mean "don't trap".
+    /*
+     * CPTR_EL2 is present in v7VE or v8, and changes format
+     * with HCR_EL2.E2H (regardless of TGE).
      */
-
-    /* CPTR_EL2 : present in v7VE or v8 */
-    if (cur_el <= 2 && extract32(env->cp15.cptr_el[2], 10, 1)
-        && arm_is_el2_enabled(env)) {
-        /* Trap FP ops at EL2, NS-EL1 or NS-EL0 to EL2 */
-        return 2;
+    if (cur_el <= 2) {
+        if (hcr_el2 & HCR_E2H) {
+            /* Check CPTR_EL2.FPEN.  */
+            switch (extract32(env->cp15.cptr_el[2], 20, 2)) {
+            case 1:
+                if (cur_el != 0 || !(hcr_el2 & HCR_TGE)) {
+                    break;
+                }
+                /* fall through */
+            case 0:
+            case 2:
+                return 2;
+            }
+        } else if (arm_is_el2_enabled(env)) {
+            if (env->cp15.cptr_el[2] & CPTR_TFP) {
+                return 2;
+            }
+        }
     }
 
     /* CPTR_EL3 : present in v8 */
-- 
2.25.1

[PULL 04/39] target/arm: Use CPTR_TFP with CPTR_EL3 in fp_exception_el

[Peter Maydell]

From: Richard Henderson <richard.henderson@linaro.org>

Use the named bit rather than a bare extract32.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Zenghui Yu <yuzenghui@huawei.com>
Message-id: 20220127063428.30212-5-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/helper.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/target/arm/helper.c b/target/arm/helper.c
index 83bbb446e70..b5f80988c90 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -13037,7 +13037,7 @@ int fp_exception_el(CPUARMState *env, int cur_el)
     }
 
     /* CPTR_EL3 : present in v8 */
-    if (extract32(env->cp15.cptr_el[3], 10, 1)) {
+    if (env->cp15.cptr_el[3] & CPTR_TFP) {
         /* Trap all FP ops to EL3 */
         return 3;
     }
-- 
2.25.1

[PULL 05/39] hw/arm/xlnx-zynqmp: 'Or' the QSPI / QSPI DMA IRQs

[Peter Maydell]

From: Francisco Iglesias <francisco.iglesias@xilinx.com>

'Or' the IRQs coming from the QSPI and QSPI DMA models. This is done for
avoiding the situation where one of the models incorrectly deasserts an
interrupt asserted from the other model (which will result in that the IRQ
is lost and will not reach guest SW).

Signed-off-by: Francisco Iglesias <francisco.iglesias@xilinx.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Luc Michel <luc@lmichel.fr>
Message-id: 20220203151742.1457-1-francisco.iglesias@xilinx.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 include/hw/arm/xlnx-zynqmp.h |  2 ++
 hw/arm/xlnx-zynqmp.c         | 14 ++++++++++++--
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/include/hw/arm/xlnx-zynqmp.h b/include/hw/arm/xlnx-zynqmp.h
index 062e637fe49..9424f81c377 100644
--- a/include/hw/arm/xlnx-zynqmp.h
+++ b/include/hw/arm/xlnx-zynqmp.h
@@ -38,6 +38,7 @@
 #include "hw/dma/xlnx_csu_dma.h"
 #include "hw/nvram/xlnx-bbram.h"
 #include "hw/nvram/xlnx-zynqmp-efuse.h"
+#include "hw/or-irq.h"
 
 #define TYPE_XLNX_ZYNQMP "xlnx-zynqmp"
 OBJECT_DECLARE_SIMPLE_TYPE(XlnxZynqMPState, XLNX_ZYNQMP)
@@ -122,6 +123,7 @@ struct XlnxZynqMPState {
     XlnxZDMA gdma[XLNX_ZYNQMP_NUM_GDMA_CH];
     XlnxZDMA adma[XLNX_ZYNQMP_NUM_ADMA_CH];
     XlnxCSUDMA qspi_dma;
+    qemu_or_irq qspi_irq_orgate;
 
     char *boot_cpu;
     ARMCPU *boot_cpu_ptr;
diff --git a/hw/arm/xlnx-zynqmp.c b/hw/arm/xlnx-zynqmp.c
index 1c52a575aad..5fbf38c4660 100644
--- a/hw/arm/xlnx-zynqmp.c
+++ b/hw/arm/xlnx-zynqmp.c
@@ -50,6 +50,7 @@
 #define LQSPI_ADDR          0xc0000000
 #define QSPI_IRQ            15
 #define QSPI_DMA_ADDR       0xff0f0800
+#define NUM_QSPI_IRQ_LINES  2
 
 #define DP_ADDR             0xfd4a0000
 #define DP_IRQ              113
@@ -362,6 +363,8 @@ static void xlnx_zynqmp_init(Object *obj)
     }
 
     object_initialize_child(obj, "qspi-dma", &s->qspi_dma, TYPE_XLNX_CSU_DMA);
+    object_initialize_child(obj, "qspi-irq-orgate",
+                            &s->qspi_irq_orgate, TYPE_OR_IRQ);
 }
 
 static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp)
@@ -709,6 +712,11 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp)
                            gic_spi[adma_ch_intr[i]]);
     }
 
+    object_property_set_int(OBJECT(&s->qspi_irq_orgate),
+                            "num-lines", NUM_QSPI_IRQ_LINES, &error_fatal);
+    qdev_realize(DEVICE(&s->qspi_irq_orgate), NULL, &error_fatal);
+    qdev_connect_gpio_out(DEVICE(&s->qspi_irq_orgate), 0, gic_spi[QSPI_IRQ]);
+
     if (!object_property_set_link(OBJECT(&s->qspi_dma), "dma",
                                   OBJECT(system_memory), errp)) {
         return;
@@ -718,7 +726,8 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp)
     }
 
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->qspi_dma), 0, QSPI_DMA_ADDR);
-    sysbus_connect_irq(SYS_BUS_DEVICE(&s->qspi_dma), 0, gic_spi[QSPI_IRQ]);
+    sysbus_connect_irq(SYS_BUS_DEVICE(&s->qspi_dma), 0,
+                       qdev_get_gpio_in(DEVICE(&s->qspi_irq_orgate), 0));
 
     if (!object_property_set_link(OBJECT(&s->qspi), "stream-connected-dma",
                                   OBJECT(&s->qspi_dma), errp)) {
@@ -729,7 +738,8 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp)
     }
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->qspi), 0, QSPI_ADDR);
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->qspi), 1, LQSPI_ADDR);
-    sysbus_connect_irq(SYS_BUS_DEVICE(&s->qspi), 0, gic_spi[QSPI_IRQ]);
+    sysbus_connect_irq(SYS_BUS_DEVICE(&s->qspi), 0,
+                       qdev_get_gpio_in(DEVICE(&s->qspi_irq_orgate), 1));
 
     for (i = 0; i < XLNX_ZYNQMP_NUM_QSPI_BUS; i++) {
         g_autofree gchar *bus_name = g_strdup_printf("qspi%d", i);
-- 
2.25.1

[PULL 06/39] target/arm: make psci-conduit settable after realize

[Peter Maydell]

We want to allow the psci-conduit property to be set after realize,
because the parts of the code which are best placed to decide if it's
OK to enable QEMU's builtin PSCI emulation (the board code and the
arm_load_kernel() function are distant from the code which creates
and realizes CPUs (typically inside an SoC object's init and realize
method) and run afterwards.

Since the DEFINE_PROP_* macros don't have support for creating
properties which can be changed after realize, change the property to
be created with object_property_add_uint32_ptr(), which is what we
already use in this function for creating settable-after-realize
properties like init-svtor and init-nsvtor.

Note that it doesn't conceptually make sense to change the setting of
the property after the machine has been completely initialized,
beacuse this would mean that the behaviour of the machine when first
started would differ from its behaviour when the system is
subsequently reset.  (It would also require the underlying state to
be migrated, which we don't do.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Tested-by: Cédric Le Goater <clg@kaod.org>
Message-id: 20220127154639.2090164-2-peter.maydell@linaro.org
---
 target/arm/cpu.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/target/arm/cpu.c b/target/arm/cpu.c
index cdbc4cdd012..5a9c02a2561 100644
--- a/target/arm/cpu.c
+++ b/target/arm/cpu.c
@@ -1317,6 +1317,11 @@ void arm_cpu_post_init(Object *obj)
                                        OBJ_PROP_FLAG_READWRITE);
     }
 
+    /* Not DEFINE_PROP_UINT32: we want this to be settable after realize */
+    object_property_add_uint32_ptr(obj, "psci-conduit",
+                                   &cpu->psci_conduit,
+                                   OBJ_PROP_FLAG_READWRITE);
+
     qdev_property_add_static(DEVICE(obj), &arm_cpu_cfgend_property);
 
     if (arm_feature(&cpu->env, ARM_FEATURE_GENERIC_TIMER)) {
@@ -1987,7 +1992,6 @@ static ObjectClass *arm_cpu_class_by_name(const char *cpu_model)
 }
 
 static Property arm_cpu_properties[] = {
-    DEFINE_PROP_UINT32("psci-conduit", ARMCPU, psci_conduit, 0),
     DEFINE_PROP_UINT64("midr", ARMCPU, midr, 0),
     DEFINE_PROP_UINT64("mp-affinity", ARMCPU,
                         mp_affinity, ARM64_AFFINITY_INVALID),
-- 
2.25.1

[PULL 07/39] cpu.c: Make start-powered-off settable after realize

[Peter Maydell]

The CPU object's start-powered-off property is currently only
settable before the CPU object is realized.  For arm machines this is
awkward, because we would like to decide whether the CPU should be
powered-off based on how we are booting the guest code, which is
something done in the machine model code and in common code called by
the machine model, which runs much later and in completely different
parts of the codebase from the SoC object code that is responsible
for creating and realizing the CPU objects.

Allow start-powered-off to be set after realize.  Since this isn't
something that's supported by the DEFINE_PROP_* macros, we have to
switch the property definition to use the
object_class_property_add_bool() function.

Note that it doesn't conceptually make sense to change the setting of
the property after the machine has been completely initialized,
beacuse this would mean that the behaviour of the machine when first
started would differ from its behaviour when the system is
subsequently reset.  (It would also require the underlying state to
be migrated, which we don't do.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Tested-by: Cédric Le Goater <clg@kaod.org>
Message-id: 20220127154639.2090164-3-peter.maydell@linaro.org
---
 cpu.c | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/cpu.c b/cpu.c
index 016bf06a1ae..3ea38aea707 100644
--- a/cpu.c
+++ b/cpu.c
@@ -196,13 +196,33 @@ static Property cpu_common_props[] = {
     DEFINE_PROP_LINK("memory", CPUState, memory, TYPE_MEMORY_REGION,
                      MemoryRegion *),
 #endif
-    DEFINE_PROP_BOOL("start-powered-off", CPUState, start_powered_off, false),
     DEFINE_PROP_END_OF_LIST(),
 };
 
+static bool cpu_get_start_powered_off(Object *obj, Error **errp)
+{
+    CPUState *cpu = CPU(obj);
+    return cpu->start_powered_off;
+}
+
+static void cpu_set_start_powered_off(Object *obj, bool value, Error **errp)
+{
+    CPUState *cpu = CPU(obj);
+    cpu->start_powered_off = value;
+}
+
 void cpu_class_init_props(DeviceClass *dc)
 {
+    ObjectClass *oc = OBJECT_CLASS(dc);
+
     device_class_set_props(dc, cpu_common_props);
+    /*
+     * We can't use DEFINE_PROP_BOOL in the Property array for this
+     * property, because we want this to be settable after realize.
+     */
+    object_class_property_add_bool(oc, "start-powered-off",
+                                   cpu_get_start_powered_off,
+                                   cpu_set_start_powered_off);
 }
 
 void cpu_exec_initfn(CPUState *cpu)
-- 
2.25.1

[PULL 08/39] hw/arm/boot: Support setting psci-conduit based on guest EL

[Peter Maydell]

Currently we expect board code to set the psci-conduit property on
CPUs and ensure that secondary CPUs are created with the
start-powered-off property set to false, if the board wishes to use
QEMU's builtin PSCI emulation.  This worked OK for the virt board
where we first wanted to use it, because the virt board directly
creates its CPUs and is in a reasonable position to set those
properties.  For other boards which model real hardware and use a
separate SoC object, however, it is more awkward.  Most PSCI-using
boards just set the psci-conduit board unconditionally.

This was never strictly speaking correct (because you would not be
able to run EL3 guest firmware that itself provided the PSCI
interface, as the QEMU implementation would overrule it), but mostly
worked in practice because for non-PSCI SMC calls QEMU would emulate
the SMC instruction as normal (by trapping to guest EL3).  However,
we would like to make our PSCI emulation follow the part of the SMCC
specification that mandates that SMC calls with unknown function
identifiers return a failure code, which means that all SMC calls
will be handled by the PSCI code and the "emulate as normal" path
will no longer be taken.

We tried to implement that in commit 9fcd15b9193e81
("arm: tcg: Adhere to SMCCC 1.3 section 5.2"), but this
regressed attempts to run EL3 guest code on the affected boards:
 * mcimx6ul-evk, mcimx7d-sabre, orangepi, xlnx-zcu102
 * for the case only of EL3 code loaded via -kernel (and
   not via -bios or -pflash), virt and xlnx-versal-virt
so for the 7.0 release we reverted it (in commit 4825eaae4fdd56f).

This commit provides a mechanism that boards can use to arrange that
psci-conduit is set if running guest code at a low enough EL but not
if it would be running at the same EL that the conduit implies that
the QEMU PSCI implementation is using.  (Later commits will convert
individual board models to use this mechanism.)

We do this by moving the setting of the psci-conduit and
start-powered-off properties to arm_load_kernel().  Boards which want
to potentially use emulated PSCI must set a psci_conduit field in the
arm_boot_info struct to the type of conduit they want to use (SMC or
HVC); arm_load_kernel() will then set the CPUs up accordingly if it
is not going to start the guest code at the same or higher EL as the
fake QEMU firmware would be at.

Board/SoC code which uses this mechanism should no longer set the CPU
psci-conduit property directly.  It should only set the
start-powered-off property for secondaries if EL3 guest firmware
running bare metal expects that rather than the alternative "all CPUs
start executing the firmware at once".

Note that when calculating whether we are going to run guest
code at EL3, we ignore the setting of arm_boot_info::secure_board_setup,
which might cause us to run a stub bit of guest code at EL3 which
does some board-specific setup before dropping to EL2 or EL1 to
run the guest kernel. This is OK because only one board that
enables PSCI sets secure_board_setup (the highbank board), and
the stub code it writes will behave the same way whether the
one SMC call it makes is handled by "emulate the SMC" or by
"PSCI default returns an error code". So we can leave that stub
code in place until after we've changed the PSCI default behaviour;
at that point we will remove it.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Tested-by: Cédric Le Goater <clg@kaod.org>
Message-id: 20220127154639.2090164-4-peter.maydell@linaro.org
---
 include/hw/arm/boot.h | 10 +++++++++
 hw/arm/boot.c         | 50 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 60 insertions(+)

diff --git a/include/hw/arm/boot.h b/include/hw/arm/boot.h
index ce2b48b88bc..0bcb58babba 100644
--- a/include/hw/arm/boot.h
+++ b/include/hw/arm/boot.h
@@ -86,6 +86,16 @@ struct arm_boot_info {
      * the user it should implement this hook.
      */
     void (*modify_dtb)(const struct arm_boot_info *info, void *fdt);
+    /*
+     * If a board wants to use the QEMU emulated-firmware PSCI support,
+     * it should set this to QEMU_PSCI_CONDUIT_HVC or QEMU_PSCI_CONDUIT_SMC
+     * as appropriate. arm_load_kernel() will set the psci-conduit and
+     * start-powered-off properties on the CPUs accordingly.
+     * Note that if the guest image is started at the same exception level
+     * as the conduit specifies calls should go to (eg guest firmware booted
+     * to EL3) then PSCI will not be enabled.
+     */
+    int psci_conduit;
     /* Used internally by arm_boot.c */
     int is_linux;
     hwaddr initrd_start;
diff --git a/hw/arm/boot.c b/hw/arm/boot.c
index 399f8e837ce..327e449f831 100644
--- a/hw/arm/boot.c
+++ b/hw/arm/boot.c
@@ -1299,6 +1299,8 @@ void arm_load_kernel(ARMCPU *cpu, MachineState *ms, struct arm_boot_info *info)
 {
     CPUState *cs;
     AddressSpace *as = arm_boot_address_space(cpu, info);
+    int boot_el;
+    CPUARMState *env = &cpu->env;
 
     /*
      * CPU objects (unlike devices) are not automatically reset on system
@@ -1329,6 +1331,54 @@ void arm_load_kernel(ARMCPU *cpu, MachineState *ms, struct arm_boot_info *info)
         arm_setup_direct_kernel_boot(cpu, info);
     }
 
+    /*
+     * Disable the PSCI conduit if it is set up to target the same
+     * or a lower EL than the one we're going to start the guest code in.
+     * This logic needs to agree with the code in do_cpu_reset() which
+     * decides whether we're going to boot the guest in the highest
+     * supported exception level or in a lower one.
+     */
+
+    /* Boot into highest supported EL ... */
+    if (arm_feature(env, ARM_FEATURE_EL3)) {
+        boot_el = 3;
+    } else if (arm_feature(env, ARM_FEATURE_EL2)) {
+        boot_el = 2;
+    } else {
+        boot_el = 1;
+    }
+    /* ...except that if we're booting Linux we adjust the EL we boot into */
+    if (info->is_linux && !info->secure_boot) {
+        boot_el = arm_feature(env, ARM_FEATURE_EL2) ? 2 : 1;
+    }
+
+    if ((info->psci_conduit == QEMU_PSCI_CONDUIT_HVC && boot_el >= 2) ||
+        (info->psci_conduit == QEMU_PSCI_CONDUIT_SMC && boot_el == 3)) {
+        info->psci_conduit = QEMU_PSCI_CONDUIT_DISABLED;
+    }
+
+    if (info->psci_conduit != QEMU_PSCI_CONDUIT_DISABLED) {
+        for (cs = first_cpu; cs; cs = CPU_NEXT(cs)) {
+            Object *cpuobj = OBJECT(cs);
+
+            object_property_set_int(cpuobj, "psci-conduit", info->psci_conduit,
+                                    &error_abort);
+            /*
+             * Secondary CPUs start in PSCI powered-down state. Like the
+             * code in do_cpu_reset(), we assume first_cpu is the primary
+             * CPU.
+             */
+            if (cs != first_cpu) {
+                object_property_set_bool(cpuobj, "start-powered-off", true,
+                                         &error_abort);
+            }
+        }
+    }
+
+    /*
+     * arm_load_dtb() may add a PSCI node so it must be called after we have
+     * decided whether to enable PSCI and set the psci-conduit CPU properties.
+     */
     if (!info->skip_dtb_autoload && have_dtb(info)) {
         if (arm_load_dtb(info->dtb_start, info, info->dtb_limit, as, ms) < 0) {
             exit(1);
-- 
2.25.1

[PULL 09/39] hw/arm: imx: Don't enable PSCI conduit when booting guest in EL3

[Peter Maydell]

Change the iMX-SoC based boards to use the new boot.c functionality
to allow us to enable psci-conduit only if the guest is being booted
in EL1 or EL2, so that if the user runs guest EL3 firmware code our
PSCI emulation doesn't get in its way.

To do this we stop setting the psci-conduit property on the CPU
objects in the SoC code, and instead set the psci_conduit field in
the arm_boot_info struct to tell the common boot loader code that
we'd like PSCI if the guest is starting at an EL that it makes
sense with.

This affects the mcimx6ul-evk and mcimx7d-sabre boards.

Note that for the mcimx7d board, this means that when running guest
code at EL3 there is currently no way to power on the secondary CPUs,
because we do not currently have a model of the system reset
controller module which should be used to do that for the imx7 SoC,
only for the imx6 SoC.  (Previously EL3 code which knew it was
running on QEMU could use a PSCI call to do this.) This doesn't
affect the imx6ul-evk board because it is uniprocessor.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Tested-by: Cédric Le Goater <clg@kaod.org>
Acked-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220127154639.2090164-5-peter.maydell@linaro.org
---
 hw/arm/fsl-imx6ul.c    | 2 --
 hw/arm/fsl-imx7.c      | 8 ++++----
 hw/arm/mcimx6ul-evk.c  | 1 +
 hw/arm/mcimx7d-sabre.c | 1 +
 4 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/hw/arm/fsl-imx6ul.c b/hw/arm/fsl-imx6ul.c
index 1d1a708dd97..f1897123294 100644
--- a/hw/arm/fsl-imx6ul.c
+++ b/hw/arm/fsl-imx6ul.c
@@ -166,8 +166,6 @@ static void fsl_imx6ul_realize(DeviceState *dev, Error **errp)
         return;
     }
 
-    object_property_set_int(OBJECT(&s->cpu), "psci-conduit",
-                            QEMU_PSCI_CONDUIT_SMC, &error_abort);
     qdev_realize(DEVICE(&s->cpu), NULL, &error_abort);
 
     /*
diff --git a/hw/arm/fsl-imx7.c b/hw/arm/fsl-imx7.c
index 149885f2b80..cc6fdb9373f 100644
--- a/hw/arm/fsl-imx7.c
+++ b/hw/arm/fsl-imx7.c
@@ -159,9 +159,6 @@ static void fsl_imx7_realize(DeviceState *dev, Error **errp)
     for (i = 0; i < smp_cpus; i++) {
         o = OBJECT(&s->cpu[i]);
 
-        object_property_set_int(o, "psci-conduit", QEMU_PSCI_CONDUIT_SMC,
-                                &error_abort);
-
         /* On uniprocessor, the CBAR is set to 0 */
         if (smp_cpus > 1) {
             object_property_set_int(o, "reset-cbar", FSL_IMX7_A7MPCORE_ADDR,
@@ -169,7 +166,10 @@ static void fsl_imx7_realize(DeviceState *dev, Error **errp)
         }
 
         if (i) {
-            /* Secondary CPUs start in PSCI powered-down state */
+            /*
+             * Secondary CPUs start in powered-down state (and can be
+             * powered up via the SRC system reset controller)
+             */
             object_property_set_bool(o, "start-powered-off", true,
                                      &error_abort);
         }
diff --git a/hw/arm/mcimx6ul-evk.c b/hw/arm/mcimx6ul-evk.c
index 28b4886f48b..8131518426a 100644
--- a/hw/arm/mcimx6ul-evk.c
+++ b/hw/arm/mcimx6ul-evk.c
@@ -35,6 +35,7 @@ static void mcimx6ul_evk_init(MachineState *machine)
         .board_id = -1,
         .ram_size = machine->ram_size,
         .nb_cpus = machine->smp.cpus,
+        .psci_conduit = QEMU_PSCI_CONDUIT_SMC,
     };
 
     s = FSL_IMX6UL(object_new(TYPE_FSL_IMX6UL));
diff --git a/hw/arm/mcimx7d-sabre.c b/hw/arm/mcimx7d-sabre.c
index 50a5ecde31a..ba84fc21920 100644
--- a/hw/arm/mcimx7d-sabre.c
+++ b/hw/arm/mcimx7d-sabre.c
@@ -37,6 +37,7 @@ static void mcimx7d_sabre_init(MachineState *machine)
         .board_id = -1,
         .ram_size = machine->ram_size,
         .nb_cpus = machine->smp.cpus,
+        .psci_conduit = QEMU_PSCI_CONDUIT_SMC,
     };
 
     s = FSL_IMX7(object_new(TYPE_FSL_IMX7));
-- 
2.25.1

[PULL 10/39] hw/arm: allwinner: Don't enable PSCI conduit when booting guest in EL3

[Peter Maydell]

Change the allwinner-h3 based board to use the new boot.c
functionality to allow us to enable psci-conduit only if the guest is
being booted in EL1 or EL2, so that if the user runs guest EL3
firmware code our PSCI emulation doesn't get in its way.

To do this we stop setting the psci-conduit property on the CPU
objects in the SoC code, and instead set the psci_conduit field in
the arm_boot_info struct to tell the common boot loader code that
we'd like PSCI if the guest is starting at an EL that it makes sense
with.

This affects the orangepi-pc board.

This commit leaves the secondary CPUs in the powered-down state if
the guest is booting at EL3, which is the same behaviour as before
this commit.  The secondaries can no longer be started by that EL3
code making a PSCI call but can still be started via the CPU
Configuration Module registers (which we model in
hw/misc/allwinner-cpucfg.c).

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Niek Linnenbank <nieklinnenbank@gmail.com>
Tested-by: Cédric Le Goater <clg@kaod.org>
Tested-by: Niek Linnenbank <nieklinnenbank@gmail.com>
Message-id: 20220127154639.2090164-6-peter.maydell@linaro.org
---
 hw/arm/allwinner-h3.c | 9 ++++-----
 hw/arm/orangepi.c     | 1 +
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/hw/arm/allwinner-h3.c b/hw/arm/allwinner-h3.c
index f9b7ed18711..318ed4348c7 100644
--- a/hw/arm/allwinner-h3.c
+++ b/hw/arm/allwinner-h3.c
@@ -235,11 +235,10 @@ static void allwinner_h3_realize(DeviceState *dev, Error **errp)
     /* CPUs */
     for (i = 0; i < AW_H3_NUM_CPUS; i++) {
 
-        /* Provide Power State Coordination Interface */
-        qdev_prop_set_int32(DEVICE(&s->cpus[i]), "psci-conduit",
-                            QEMU_PSCI_CONDUIT_SMC);
-
-        /* Disable secondary CPUs */
+        /*
+         * Disable secondary CPUs. Guest EL3 firmware will start
+         * them via CPU reset control registers.
+         */
         qdev_prop_set_bit(DEVICE(&s->cpus[i]), "start-powered-off",
                           i > 0);
 
diff --git a/hw/arm/orangepi.c b/hw/arm/orangepi.c
index e7963822367..68fe9182414 100644
--- a/hw/arm/orangepi.c
+++ b/hw/arm/orangepi.c
@@ -105,6 +105,7 @@ static void orangepi_init(MachineState *machine)
     }
     orangepi_binfo.loader_start = h3->memmap[AW_H3_DEV_SDRAM];
     orangepi_binfo.ram_size = machine->ram_size;
+    orangepi_binfo.psci_conduit = QEMU_PSCI_CONDUIT_SMC;
     arm_load_kernel(ARM_CPU(first_cpu), machine, &orangepi_binfo);
 }
 
-- 
2.25.1

[PULL 11/39] hw/arm/xlnx-zcu102: Don't enable PSCI conduit when booting guest in EL3

[Peter Maydell]

Change the Xilinx ZynqMP-based board xlnx-zcu102 to use the new
boot.c functionality to allow us to enable psci-conduit only if
the guest is being booted in EL1 or EL2, so that if the user runs
guest EL3 firmware code our PSCI emulation doesn't get in its
way.

To do this we stop setting the psci-conduit property on the CPU
objects in the SoC code, and instead set the psci_conduit field in
the arm_boot_info struct to tell the common boot loader code that
we'd like PSCI if the guest is starting at an EL that it makes
sense with.

Note that this means that EL3 guest code will have no way
to power on secondary cores, because we don't model any
kind of power controller that does that on this SoC.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Niek Linnenbank <nieklinnenbank@gmail.com>
Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Tested-by: Cédric Le Goater <clg@kaod.org>
Tested-by: Niek Linnenbank <nieklinnenbank@gmail.com>
Acked-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220127154639.2090164-7-peter.maydell@linaro.org
---
 hw/arm/xlnx-zcu102.c |  1 +
 hw/arm/xlnx-zynqmp.c | 11 ++++++-----
 2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/hw/arm/xlnx-zcu102.c b/hw/arm/xlnx-zcu102.c
index 45eb19ab3b7..4c84bb932aa 100644
--- a/hw/arm/xlnx-zcu102.c
+++ b/hw/arm/xlnx-zcu102.c
@@ -236,6 +236,7 @@ static void xlnx_zcu102_init(MachineState *machine)
     s->binfo.ram_size = ram_size;
     s->binfo.loader_start = 0;
     s->binfo.modify_dtb = zcu102_modify_dtb;
+    s->binfo.psci_conduit = QEMU_PSCI_CONDUIT_SMC;
     arm_load_kernel(s->soc.boot_cpu_ptr, machine, &s->binfo);
 }
 
diff --git a/hw/arm/xlnx-zynqmp.c b/hw/arm/xlnx-zynqmp.c
index 5fbf38c4660..6d0e4116db7 100644
--- a/hw/arm/xlnx-zynqmp.c
+++ b/hw/arm/xlnx-zynqmp.c
@@ -216,7 +216,9 @@ static void xlnx_zynqmp_create_rpu(MachineState *ms, XlnxZynqMPState *s,
 
         name = object_get_canonical_path_component(OBJECT(&s->rpu_cpu[i]));
         if (strcmp(name, boot_cpu)) {
-            /* Secondary CPUs start in PSCI powered-down state */
+            /*
+             * Secondary CPUs start in powered-down state.
+             */
             object_property_set_bool(OBJECT(&s->rpu_cpu[i]),
                                      "start-powered-off", true, &error_abort);
         } else {
@@ -438,12 +440,11 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp)
     for (i = 0; i < num_apus; i++) {
         const char *name;
 
-        object_property_set_int(OBJECT(&s->apu_cpu[i]), "psci-conduit",
-                                QEMU_PSCI_CONDUIT_SMC, &error_abort);
-
         name = object_get_canonical_path_component(OBJECT(&s->apu_cpu[i]));
         if (strcmp(name, boot_cpu)) {
-            /* Secondary CPUs start in PSCI powered-down state */
+            /*
+             * Secondary CPUs start in powered-down state.
+             */
             object_property_set_bool(OBJECT(&s->apu_cpu[i]),
                                      "start-powered-off", true, &error_abort);
         } else {
-- 
2.25.1

[PULL 12/39] hw/arm/versal: Let boot.c handle PSCI enablement

[Peter Maydell]

Instead of setting the CPU psci-conduit and start-powered-off
properties in the xlnx-versal-virt board code, set the arm_boot_info
psci_conduit field so that the boot.c code can do it.

This will fix a corner case where we were incorrectly enabling PSCI
emulation when booting guest code into EL3 because it was an ELF file
passed to -kernel.  (EL3 guest code started via -bios, -pflash, or
the generic loader was already being run with PSCI emulation
disabled.)

Note that EL3 guest code has no way to turn on the secondary CPUs
because there's no emulated power controller, but this was already
true for EL3 guest code run via -bios, -pflash, or the generic
loader.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Niek Linnenbank <nieklinnenbank@gmail.com>
Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Tested-by: Cédric Le Goater <clg@kaod.org>
Tested-by: Niek Linnenbank <nieklinnenbank@gmail.com>
Message-id: 20220127154639.2090164-8-peter.maydell@linaro.org
---
 include/hw/arm/xlnx-versal.h | 1 -
 hw/arm/xlnx-versal-virt.c    | 6 ++++--
 hw/arm/xlnx-versal.c         | 5 +----
 3 files changed, 5 insertions(+), 7 deletions(-)

diff --git a/include/hw/arm/xlnx-versal.h b/include/hw/arm/xlnx-versal.h
index 1b5ad4de802..0728316ec77 100644
--- a/include/hw/arm/xlnx-versal.h
+++ b/include/hw/arm/xlnx-versal.h
@@ -103,7 +103,6 @@ struct Versal {
 
     struct {
         MemoryRegion *mr_ddr;
-        uint32_t psci_conduit;
     } cfg;
 };
 
diff --git a/hw/arm/xlnx-versal-virt.c b/hw/arm/xlnx-versal-virt.c
index 3f56ae28eea..ef3231cdbb3 100644
--- a/hw/arm/xlnx-versal-virt.c
+++ b/hw/arm/xlnx-versal-virt.c
@@ -628,6 +628,9 @@ static void versal_virt_init(MachineState *machine)
      * When loading an OS, we turn on QEMU's PSCI implementation with SMC
      * as the PSCI conduit. When there's no -kernel, we assume the user
      * provides EL3 firmware to handle PSCI.
+     *
+     * Even if the user provides a kernel filename, arm_load_kernel()
+     * may suppress PSCI if it's going to boot that guest code at EL3.
      */
     if (machine->kernel_filename) {
         psci_conduit = QEMU_PSCI_CONDUIT_SMC;
@@ -637,8 +640,6 @@ static void versal_virt_init(MachineState *machine)
                             TYPE_XLNX_VERSAL);
     object_property_set_link(OBJECT(&s->soc), "ddr", OBJECT(machine->ram),
                              &error_abort);
-    object_property_set_int(OBJECT(&s->soc), "psci-conduit", psci_conduit,
-                            &error_abort);
     sysbus_realize(SYS_BUS_DEVICE(&s->soc), &error_fatal);
 
     fdt_create(s);
@@ -679,6 +680,7 @@ static void versal_virt_init(MachineState *machine)
     s->binfo.loader_start = 0x0;
     s->binfo.get_dtb = versal_virt_get_dtb;
     s->binfo.modify_dtb = versal_virt_modify_dtb;
+    s->binfo.psci_conduit = psci_conduit;
     if (machine->kernel_filename) {
         arm_load_kernel(&s->soc.fpd.apu.cpu[0], machine, &s->binfo);
     } else {
diff --git a/hw/arm/xlnx-versal.c b/hw/arm/xlnx-versal.c
index ab58bebfd2e..2551dfc22d6 100644
--- a/hw/arm/xlnx-versal.c
+++ b/hw/arm/xlnx-versal.c
@@ -40,10 +40,8 @@ static void versal_create_apu_cpus(Versal *s)
         object_initialize_child(OBJECT(s), "apu-cpu[*]", &s->fpd.apu.cpu[i],
                                 XLNX_VERSAL_ACPU_TYPE);
         obj = OBJECT(&s->fpd.apu.cpu[i]);
-        object_property_set_int(obj, "psci-conduit", s->cfg.psci_conduit,
-                                &error_abort);
         if (i) {
-            /* Secondary CPUs start in PSCI powered-down state */
+            /* Secondary CPUs start in powered-down state */
             object_property_set_bool(obj, "start-powered-off", true,
                                      &error_abort);
         }
@@ -667,7 +665,6 @@ static void versal_init(Object *obj)
 static Property versal_properties[] = {
     DEFINE_PROP_LINK("ddr", Versal, cfg.mr_ddr, TYPE_MEMORY_REGION,
                      MemoryRegion *),
-    DEFINE_PROP_UINT32("psci-conduit", Versal, cfg.psci_conduit, 0),
     DEFINE_PROP_END_OF_LIST()
 };
 
-- 
2.25.1

[PULL 13/39] hw/arm/virt: Let boot.c handle PSCI enablement

[Peter Maydell]

Instead of setting the CPU psci-conduit and start-powered-off
properties in the virt board code, set the arm_boot_info psci_conduit
field so that the boot.c code can do it.

This will fix a corner case where we were incorrectly enabling PSCI
emulation when booting guest code into EL3 because it was an ELF file
passed to -kernel or to the generic loader.  (EL3 guest code started
via -bios or -pflash was already being run with PSCI emulation
disabled.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Niek Linnenbank <nieklinnenbank@gmail.com>
Tested-by: Cédric Le Goater <clg@kaod.org>
Tested-by: Niek Linnenbank <nieklinnenbank@gmail.com>
Message-id: 20220127154639.2090164-9-peter.maydell@linaro.org
---
 hw/arm/virt.c | 12 +-----------
 1 file changed, 1 insertion(+), 11 deletions(-)

diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 141350bf215..398145a7180 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -2088,17 +2088,6 @@ static void machvirt_init(MachineState *machine)
             object_property_set_bool(cpuobj, "has_el2", false, NULL);
         }
 
-        if (vms->psci_conduit != QEMU_PSCI_CONDUIT_DISABLED) {
-            object_property_set_int(cpuobj, "psci-conduit", vms->psci_conduit,
-                                    NULL);
-
-            /* Secondary CPUs start in PSCI powered-down state */
-            if (n > 0) {
-                object_property_set_bool(cpuobj, "start-powered-off", true,
-                                         NULL);
-            }
-        }
-
         if (vmc->kvm_no_adjvtime &&
             object_property_find(cpuobj, "kvm-no-adjvtime")) {
             object_property_set_bool(cpuobj, "kvm-no-adjvtime", true, NULL);
@@ -2246,6 +2235,7 @@ static void machvirt_init(MachineState *machine)
     vms->bootinfo.get_dtb = machvirt_dtb;
     vms->bootinfo.skip_dtb_autoload = true;
     vms->bootinfo.firmware_loaded = firmware_loaded;
+    vms->bootinfo.psci_conduit = vms->psci_conduit;
     arm_load_kernel(ARM_CPU(first_cpu), machine, &vms->bootinfo);
 
     vms->machine_done.notify = virt_machine_done;
-- 
2.25.1

[PULL 14/39] hw/arm: highbank: For EL3 guests, don't enable PSCI, start all cores

[Peter Maydell]

Change the highbank/midway boards to use the new boot.c functionality
to allow us to enable psci-conduit only if the guest is being booted
in EL1 or EL2, so that if the user runs guest EL3 firmware code our
PSCI emulation doesn't get in its way.

To do this we stop setting the psci-conduit and start-powered-off
properties on the CPU objects in the board code, and instead set the
psci_conduit field in the arm_boot_info struct to tell the common
boot loader code that we'd like PSCI if the guest is starting at an
EL that it makes sense with (in which case it will set these
properties).

This means that when running guest code at EL3, all the cores
will start execution at once on poweron. This matches the
real hardware behaviour. (A brief description of the hardware
boot process is in the u-boot documentation for these boards:
https://u-boot.readthedocs.io/en/latest/board/highbank/highbank.html#boot-process
 -- in theory one might run the 'a9boot'/'a15boot' secure monitor
code in QEMU, though we probably don't emulate enough for that.)

This affects the highbank and midway boards.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Niek Linnenbank <nieklinnenbank@gmail.com>
Tested-by: Cédric Le Goater <clg@kaod.org>
Tested-by: Niek Linnenbank <nieklinnenbank@gmail.com>
Message-id: 20220127154639.2090164-10-peter.maydell@linaro.org
---
 hw/arm/highbank.c | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/hw/arm/highbank.c b/hw/arm/highbank.c
index 4210894d814..048f8550cb9 100644
--- a/hw/arm/highbank.c
+++ b/hw/arm/highbank.c
@@ -271,12 +271,6 @@ static void calxeda_init(MachineState *machine, enum cxmachines machine_id)
         object_property_set_int(cpuobj, "psci-conduit", QEMU_PSCI_CONDUIT_SMC,
                                 &error_abort);
 
-        if (n) {
-            /* Secondary CPUs start in PSCI powered-down state */
-            object_property_set_bool(cpuobj, "start-powered-off", true,
-                                     &error_abort);
-        }
-
         if (object_property_find(cpuobj, "reset-cbar")) {
             object_property_set_int(cpuobj, "reset-cbar", MPCORE_PERIPHBASE,
                                     &error_abort);
@@ -397,6 +391,7 @@ static void calxeda_init(MachineState *machine, enum cxmachines machine_id)
     highbank_binfo.board_setup_addr = BOARD_SETUP_ADDR;
     highbank_binfo.write_board_setup = hb_write_board_setup;
     highbank_binfo.secure_board_setup = true;
+    highbank_binfo.psci_conduit = QEMU_PSCI_CONDUIT_SMC;
 
     arm_load_kernel(ARM_CPU(first_cpu), machine, &highbank_binfo);
 }
-- 
2.25.1

[PULL 15/39] arm: tcg: Adhere to SMCCC 1.3 section 5.2

[Peter Maydell]

The SMCCC 1.3 spec section 5.2 says

  The Unknown SMC Function Identifier is a sign-extended value of (-1)
  that is returned in the R0, W0 or X0 registers. An implementation must
  return this error code when it receives:

    * An SMC or HVC call with an unknown Function Identifier
    * An SMC or HVC call for a removed Function Identifier
    * An SMC64/HVC64 call from AArch32 state

To comply with these statements, let's always return -1 when we encounter
an unknown HVC or SMC call.

[PMM:
 This is a reinstatement of commit 9fcd15b9193e819b, previously
 reverted in commit 4825eaae4fdd56fba0f; we can do this now that we
 have arranged for all the affected board models to not enable the
 PSCI emulation if they are running guest code at EL3. This avoids
 the regressions that caused us to revert the change for 7.0.]

Signed-off-by: Alexander Graf <agraf@csgraf.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Niek Linnenbank <nieklinnenbank@gmail.com>
Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Tested-by: Cédric Le Goater <clg@kaod.org>
Tested-by: Niek Linnenbank <nieklinnenbank@gmail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/psci.c | 35 ++++++-----------------------------
 1 file changed, 6 insertions(+), 29 deletions(-)

diff --git a/target/arm/psci.c b/target/arm/psci.c
index 6709e280133..b279c0b9a45 100644
--- a/target/arm/psci.c
+++ b/target/arm/psci.c
@@ -27,15 +27,13 @@
 
 bool arm_is_psci_call(ARMCPU *cpu, int excp_type)
 {
-    /* Return true if the r0/x0 value indicates a PSCI call and
-     * the exception type matches the configured PSCI conduit. This is
-     * called before the SMC/HVC instruction is executed, to decide whether
-     * we should treat it as a PSCI call or with the architecturally
+    /*
+     * Return true if the exception type matches the configured PSCI conduit.
+     * This is called before the SMC/HVC instruction is executed, to decide
+     * whether we should treat it as a PSCI call or with the architecturally
      * defined behaviour for an SMC or HVC (which might be UNDEF or trap
      * to EL2 or to EL3).
      */
-    CPUARMState *env = &cpu->env;
-    uint64_t param = is_a64(env) ? env->xregs[0] : env->regs[0];
 
     switch (excp_type) {
     case EXCP_HVC:
@@ -52,27 +50,7 @@ bool arm_is_psci_call(ARMCPU *cpu, int excp_type)
         return false;
     }
 
-    switch (param) {
-    case QEMU_PSCI_0_2_FN_PSCI_VERSION:
-    case QEMU_PSCI_0_2_FN_MIGRATE_INFO_TYPE:
-    case QEMU_PSCI_0_2_FN_AFFINITY_INFO:
-    case QEMU_PSCI_0_2_FN64_AFFINITY_INFO:
-    case QEMU_PSCI_0_2_FN_SYSTEM_RESET:
-    case QEMU_PSCI_0_2_FN_SYSTEM_OFF:
-    case QEMU_PSCI_0_1_FN_CPU_ON:
-    case QEMU_PSCI_0_2_FN_CPU_ON:
-    case QEMU_PSCI_0_2_FN64_CPU_ON:
-    case QEMU_PSCI_0_1_FN_CPU_OFF:
-    case QEMU_PSCI_0_2_FN_CPU_OFF:
-    case QEMU_PSCI_0_1_FN_CPU_SUSPEND:
-    case QEMU_PSCI_0_2_FN_CPU_SUSPEND:
-    case QEMU_PSCI_0_2_FN64_CPU_SUSPEND:
-    case QEMU_PSCI_0_1_FN_MIGRATE:
-    case QEMU_PSCI_0_2_FN_MIGRATE:
-        return true;
-    default:
-        return false;
-    }
+    return true;
 }
 
 void arm_handle_psci_call(ARMCPU *cpu)
@@ -194,10 +172,9 @@ void arm_handle_psci_call(ARMCPU *cpu)
         break;
     case QEMU_PSCI_0_1_FN_MIGRATE:
     case QEMU_PSCI_0_2_FN_MIGRATE:
+    default:
         ret = QEMU_PSCI_RET_NOT_SUPPORTED;
         break;
-    default:
-        g_assert_not_reached();
     }
 
 err:
-- 
2.25.1

[PULL 16/39] hw/arm/highbank: Drop use of secure_board_setup

[Peter Maydell]

Guest code on highbank may make non-PSCI SMC calls in order to
enable/disable the L2x0 cache controller (see the Linux kernel's
arch/arm/mach-highbank/highbank.c highbank_l2c310_write_sec()
function).  The ABI for this is documented in kernel commit
8e56130dcb as being borrowed from the OMAP44xx ROM.  The OMAP44xx TRM
documents this function ID as having no return value and potentially
trashing all guest registers except SP and PC. For QEMU's purposes
(where our L2x0 model is a stub and enabling or disabling it doesn't
affect the guest behaviour) a simple "do nothing" SMC is fine.

We currently implement this NOP behaviour using a little bit of
Secure code we run before jumping to the guest kernel, which is
written by arm_write_secure_board_setup_dummy_smc().  The code sets
up a set of Secure vectors where the SMC entry point returns without
doing anything.

Now that the PSCI SMC emulation handles all SMC calls (setting r0 to
an error code if the input r0 function identifier is not recognized),
we can use that default behaviour as sufficient for the highbank
cache controller call.  (Because the guest code assumes r0 has no
interesting value on exit it doesn't matter that we set it to the
error code).  We can therefore delete the highbank board code that
sets secure_board_setup to true and writes the secure-code bootstub.

(Note that because the OMAP44xx ABI puts function-identifiers in
r12 and PSCI uses r0, we only avoid a clash because Linux's code
happens to put the function-identifier in both registers. But this
is true also when the kernel is running on real firmware that
implements both ABIs as far as I can see.)

This change fixes in passing booting on the 'midway' board model,
which has been completely broken since we added support for Hyp
mode to the Cortex-A15 CPU. When we did that boot.c was made to
start running the guest code in Hyp mode; this includes the
board_setup hook, which instantly UNDEFs because the NSACR is
not accessible from Hyp. (Put another way, we never made the
secure_board_setup hook support cope with Hyp mode.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Niek Linnenbank <nieklinnenbank@gmail.com>
Tested-by: Cédric Le Goater <clg@kaod.org>
Tested-by: Niek Linnenbank <nieklinnenbank@gmail.com>
Message-id: 20220127154639.2090164-12-peter.maydell@linaro.org
---
 hw/arm/highbank.c | 8 --------
 1 file changed, 8 deletions(-)

diff --git a/hw/arm/highbank.c b/hw/arm/highbank.c
index 048f8550cb9..a21afd178d1 100644
--- a/hw/arm/highbank.c
+++ b/hw/arm/highbank.c
@@ -48,12 +48,6 @@
 
 /* Board init.  */
 
-static void hb_write_board_setup(ARMCPU *cpu,
-                                 const struct arm_boot_info *info)
-{
-    arm_write_secure_board_setup_dummy_smc(cpu, info, MVBAR_ADDR);
-}
-
 static void hb_write_secondary(ARMCPU *cpu, const struct arm_boot_info *info)
 {
     int n;
@@ -389,8 +383,6 @@ static void calxeda_init(MachineState *machine, enum cxmachines machine_id)
     highbank_binfo.write_secondary_boot = hb_write_secondary;
     highbank_binfo.secondary_cpu_reset_hook = hb_reset_secondary;
     highbank_binfo.board_setup_addr = BOARD_SETUP_ADDR;
-    highbank_binfo.write_board_setup = hb_write_board_setup;
-    highbank_binfo.secure_board_setup = true;
     highbank_binfo.psci_conduit = QEMU_PSCI_CONDUIT_SMC;
 
     arm_load_kernel(ARM_CPU(first_cpu), machine, &highbank_binfo);
-- 
2.25.1

[PULL 17/39] hw/arm/boot: Prevent setting both psci_conduit and secure_board_setup

[Peter Maydell]

Now that we have dealt with the one special case (highbank) that needed
to set both psci_conduit and secure_board_setup, we don't need to
allow that combination any more. It doesn't make sense in general,
so use an assertion to ensure we don't add new boards that do it
by accident without thinking through the consequences.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Niek Linnenbank <nieklinnenbank@gmail.com>
Tested-by: Cédric Le Goater <clg@kaod.org>
Tested-by: Niek Linnenbank <nieklinnenbank@gmail.com>
Message-id: 20220127154639.2090164-13-peter.maydell@linaro.org
---
 hw/arm/boot.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/hw/arm/boot.c b/hw/arm/boot.c
index 327e449f831..0424c178305 100644
--- a/hw/arm/boot.c
+++ b/hw/arm/boot.c
@@ -1339,6 +1339,16 @@ void arm_load_kernel(ARMCPU *cpu, MachineState *ms, struct arm_boot_info *info)
      * supported exception level or in a lower one.
      */
 
+    /*
+     * If PSCI is enabled, then SMC calls all go to the PSCI handler and
+     * are never emulated to trap into guest code. It therefore does not
+     * make sense for the board to have a setup code fragment that runs
+     * in Secure, because this will probably need to itself issue an SMC of some
+     * kind as part of its operation.
+     */
+    assert(info->psci_conduit == QEMU_PSCI_CONDUIT_DISABLED ||
+           !info->secure_board_setup);
+
     /* Boot into highest supported EL ... */
     if (arm_feature(env, ARM_FEATURE_EL3)) {
         boot_el = 3;
-- 
2.25.1

[PULL 18/39] hw/arm/boot: Don't write secondary boot stub if using PSCI

[Peter Maydell]

If we're using PSCI emulation to start secondary CPUs, there is no
point in writing the "secondary boot" stub code, because it will
never be used -- secondary CPUs start powered-off, and when powered
on are set to begin execution at the address specified by the guest's
power-on PSCI call, not at the stub.

Move the call to the hook that writes the secondary boot stub code so
that we can do it only if we're starting a Linux kernel and not using
PSCI.

(None of the users of the hook care about the ordering of its call
relative to anything else: they only use it to write a rom blob to
guest memory.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Niek Linnenbank <nieklinnenbank@gmail.com>
Tested-by: Cédric Le Goater <clg@kaod.org>
Tested-by: Niek Linnenbank <nieklinnenbank@gmail.com>
Message-id: 20220127154639.2090164-14-peter.maydell@linaro.org
---
 include/hw/arm/boot.h |  3 +++
 hw/arm/boot.c         | 35 ++++++++++++++++++++++++-----------
 2 files changed, 27 insertions(+), 11 deletions(-)

diff --git a/include/hw/arm/boot.h b/include/hw/arm/boot.h
index 0bcb58babba..0cfc1c95c4e 100644
--- a/include/hw/arm/boot.h
+++ b/include/hw/arm/boot.h
@@ -70,6 +70,9 @@ struct arm_boot_info {
      * boot loader/boot ROM code, and secondary_cpu_reset_hook() should
      * perform any necessary CPU reset handling and set the PC for the
      * secondary CPUs to point at this boot blob.
+     *
+     * These hooks won't be called if secondary CPUs are booting via
+     * emulated PSCI (see psci_conduit below).
      */
     void (*write_secondary_boot)(ARMCPU *cpu,
                                  const struct arm_boot_info *info);
diff --git a/hw/arm/boot.c b/hw/arm/boot.c
index 0424c178305..184628ce564 100644
--- a/hw/arm/boot.c
+++ b/hw/arm/boot.c
@@ -804,7 +804,7 @@ static void do_cpu_reset(void *opaque)
                         set_kernel_args(info, as);
                     }
                 }
-            } else {
+            } else if (info->secondary_cpu_reset_hook) {
                 info->secondary_cpu_reset_hook(cpu, info);
             }
         }
@@ -1030,13 +1030,6 @@ static void arm_setup_direct_kernel_boot(ARMCPU *cpu,
         elf_machine = EM_ARM;
     }
 
-    if (!info->secondary_cpu_reset_hook) {
-        info->secondary_cpu_reset_hook = default_reset_secondary;
-    }
-    if (!info->write_secondary_boot) {
-        info->write_secondary_boot = default_write_secondary;
-    }
-
     if (info->nb_cpus == 0)
         info->nb_cpus = 1;
 
@@ -1216,9 +1209,6 @@ static void arm_setup_direct_kernel_boot(ARMCPU *cpu,
         write_bootloader("bootloader", info->loader_start,
                          primary_loader, fixupcontext, as);
 
-        if (info->nb_cpus > 1) {
-            info->write_secondary_boot(cpu, info);
-        }
         if (info->write_board_setup) {
             info->write_board_setup(cpu, info);
         }
@@ -1385,6 +1375,29 @@ void arm_load_kernel(ARMCPU *cpu, MachineState *ms, struct arm_boot_info *info)
         }
     }
 
+    if (info->psci_conduit == QEMU_PSCI_CONDUIT_DISABLED &&
+        info->is_linux && info->nb_cpus > 1) {
+        /*
+         * We're booting Linux but not using PSCI, so for SMP we need
+         * to write a custom secondary CPU boot loader stub, and arrange
+         * for the secondary CPU reset to make the accompanying initialization.
+         */
+        if (!info->secondary_cpu_reset_hook) {
+            info->secondary_cpu_reset_hook = default_reset_secondary;
+        }
+        if (!info->write_secondary_boot) {
+            info->write_secondary_boot = default_write_secondary;
+        }
+        info->write_secondary_boot(cpu, info);
+    } else {
+        /*
+         * No secondary boot stub; don't use the reset hook that would
+         * have set the CPU up to call it
+         */
+        info->write_secondary_boot = NULL;
+        info->secondary_cpu_reset_hook = NULL;
+    }
+
     /*
      * arm_load_dtb() may add a PSCI node so it must be called after we have
      * decided whether to enable PSCI and set the psci-conduit CPU properties.
-- 
2.25.1

[PULL 19/39] hw/arm/highbank: Drop unused secondary boot stub code

[Peter Maydell]

The highbank and midway board code includes boot-stub code for
handling secondary CPU boot which keeps the secondaries in a pen
until the primary writes to a known location with the address they
should jump to.

This code is never used, because the boards enable QEMU's PSCI
emulation, so secondary CPUs are kept powered off until the PSCI call
which turns them on, and then start execution from the address given
by the guest in that PSCI call.  Delete the unreachable code.

(The code was wrong for midway in any case -- on the Cortex-A15 the
GIC CPU interface registers are at a different offset from PERIPHBASE
compared to the Cortex-A9, and the code baked-in the offsets for
highbank's A9.)

Note that this commit implicitly depends on the preceding "Don't
write secondary boot stub if using PSCI" commit -- the default
secondary-boot stub code overlaps with one of the highbank-specific
bootcode rom blobs, so we must suppress the secondary-boot
stub code entirely, not merely replace the highbank-specific
version with the default.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Niek Linnenbank <nieklinnenbank@gmail.com>
Tested-by: Cédric Le Goater <clg@kaod.org>
Tested-by: Niek Linnenbank <nieklinnenbank@gmail.com>
Message-id: 20220127154639.2090164-15-peter.maydell@linaro.org
---
 hw/arm/highbank.c | 56 -----------------------------------------------
 1 file changed, 56 deletions(-)

diff --git a/hw/arm/highbank.c b/hw/arm/highbank.c
index a21afd178d1..da681b15708 100644
--- a/hw/arm/highbank.c
+++ b/hw/arm/highbank.c
@@ -48,60 +48,6 @@
 
 /* Board init.  */
 
-static void hb_write_secondary(ARMCPU *cpu, const struct arm_boot_info *info)
-{
-    int n;
-    uint32_t smpboot[] = {
-        0xee100fb0, /* mrc p15, 0, r0, c0, c0, 5 - read current core id */
-        0xe210000f, /* ands r0, r0, #0x0f */
-        0xe3a03040, /* mov r3, #0x40 - jump address is 0x40 + 0x10 * core id */
-        0xe0830200, /* add r0, r3, r0, lsl #4 */
-        0xe59f2024, /* ldr r2, privbase */
-        0xe3a01001, /* mov r1, #1 */
-        0xe5821100, /* str r1, [r2, #256] - set GICC_CTLR.Enable */
-        0xe3a010ff, /* mov r1, #0xff */
-        0xe5821104, /* str r1, [r2, #260] - set GICC_PMR.Priority to 0xff */
-        0xf57ff04f, /* dsb */
-        0xe320f003, /* wfi */
-        0xe5901000, /* ldr     r1, [r0] */
-        0xe1110001, /* tst     r1, r1 */
-        0x0afffffb, /* beq     <wfi> */
-        0xe12fff11, /* bx      r1 */
-        MPCORE_PERIPHBASE   /* privbase: MPCore peripheral base address.  */
-    };
-    for (n = 0; n < ARRAY_SIZE(smpboot); n++) {
-        smpboot[n] = tswap32(smpboot[n]);
-    }
-    rom_add_blob_fixed_as("smpboot", smpboot, sizeof(smpboot), SMP_BOOT_ADDR,
-                          arm_boot_address_space(cpu, info));
-}
-
-static void hb_reset_secondary(ARMCPU *cpu, const struct arm_boot_info *info)
-{
-    CPUARMState *env = &cpu->env;
-
-    switch (info->nb_cpus) {
-    case 4:
-        address_space_stl_notdirty(&address_space_memory,
-                                   SMP_BOOT_REG + 0x30, 0,
-                                   MEMTXATTRS_UNSPECIFIED, NULL);
-        /* fallthrough */
-    case 3:
-        address_space_stl_notdirty(&address_space_memory,
-                                   SMP_BOOT_REG + 0x20, 0,
-                                   MEMTXATTRS_UNSPECIFIED, NULL);
-        /* fallthrough */
-    case 2:
-        address_space_stl_notdirty(&address_space_memory,
-                                   SMP_BOOT_REG + 0x10, 0,
-                                   MEMTXATTRS_UNSPECIFIED, NULL);
-        env->regs[15] = SMP_BOOT_ADDR;
-        break;
-    default:
-        break;
-    }
-}
-
 #define NUM_REGS      0x200
 static void hb_regs_write(void *opaque, hwaddr offset,
                           uint64_t value, unsigned size)
@@ -380,8 +326,6 @@ static void calxeda_init(MachineState *machine, enum cxmachines machine_id)
     highbank_binfo.board_id = -1;
     highbank_binfo.nb_cpus = smp_cpus;
     highbank_binfo.loader_start = 0;
-    highbank_binfo.write_secondary_boot = hb_write_secondary;
-    highbank_binfo.secondary_cpu_reset_hook = hb_reset_secondary;
     highbank_binfo.board_setup_addr = BOARD_SETUP_ADDR;
     highbank_binfo.psci_conduit = QEMU_PSCI_CONDUIT_SMC;
 
-- 
2.25.1

[PULL 20/39] hw/arm/boot: Drop nb_cpus field from arm_boot_info

[Peter Maydell]

We use the arm_boot_info::nb_cpus field in only one place, and that
place can easily get the number of CPUs locally rather than relying
on the board code to have set the field correctly.  (At least one
board, xlnx-versal-virt, does not set the field despite having more
than one CPU.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Niek Linnenbank <nieklinnenbank@gmail.com>
Tested-by: Cédric Le Goater <clg@kaod.org>
Tested-by: Niek Linnenbank <nieklinnenbank@gmail.com>
Message-id: 20220127154639.2090164-16-peter.maydell@linaro.org
---
 include/hw/arm/boot.h   | 1 -
 hw/arm/aspeed.c         | 1 -
 hw/arm/boot.c           | 7 +++----
 hw/arm/exynos4_boards.c | 1 -
 hw/arm/highbank.c       | 1 -
 hw/arm/imx25_pdk.c      | 3 +--
 hw/arm/kzm.c            | 1 -
 hw/arm/mcimx6ul-evk.c   | 1 -
 hw/arm/mcimx7d-sabre.c  | 1 -
 hw/arm/npcm7xx.c        | 3 ---
 hw/arm/orangepi.c       | 4 +---
 hw/arm/raspi.c          | 1 -
 hw/arm/realview.c       | 1 -
 hw/arm/sabrelite.c      | 1 -
 hw/arm/sbsa-ref.c       | 1 -
 hw/arm/vexpress.c       | 1 -
 hw/arm/virt.c           | 1 -
 hw/arm/xilinx_zynq.c    | 1 -
 18 files changed, 5 insertions(+), 26 deletions(-)

diff --git a/include/hw/arm/boot.h b/include/hw/arm/boot.h
index 0cfc1c95c4e..c7ebae156ec 100644
--- a/include/hw/arm/boot.h
+++ b/include/hw/arm/boot.h
@@ -56,7 +56,6 @@ struct arm_boot_info {
     hwaddr smp_loader_start;
     hwaddr smp_bootreg_addr;
     hwaddr gic_cpu_if_addr;
-    int nb_cpus;
     int board_id;
     /* ARM machines that support the ARM Security Extensions use this field to
      * control whether Linux is booted as secure(true) or non-secure(false).
diff --git a/hw/arm/aspeed.c b/hw/arm/aspeed.c
index cf20ae0db5e..d911dc904fb 100644
--- a/hw/arm/aspeed.c
+++ b/hw/arm/aspeed.c
@@ -431,7 +431,6 @@ static void aspeed_machine_init(MachineState *machine)
 
     aspeed_board_binfo.ram_size = machine->ram_size;
     aspeed_board_binfo.loader_start = sc->memmap[ASPEED_DEV_SDRAM];
-    aspeed_board_binfo.nb_cpus = sc->num_cpus;
 
     if (amc->i2c_init) {
         amc->i2c_init(bmc);
diff --git a/hw/arm/boot.c b/hw/arm/boot.c
index 184628ce564..b46f1fe889e 100644
--- a/hw/arm/boot.c
+++ b/hw/arm/boot.c
@@ -1030,9 +1030,6 @@ static void arm_setup_direct_kernel_boot(ARMCPU *cpu,
         elf_machine = EM_ARM;
     }
 
-    if (info->nb_cpus == 0)
-        info->nb_cpus = 1;
-
     /* Assume that raw images are linux kernels, and ELF images are not.  */
     kernel_size = arm_load_elf(info, &elf_entry, &image_low_addr,
                                &image_high_addr, elf_machine, as);
@@ -1291,6 +1288,7 @@ void arm_load_kernel(ARMCPU *cpu, MachineState *ms, struct arm_boot_info *info)
     AddressSpace *as = arm_boot_address_space(cpu, info);
     int boot_el;
     CPUARMState *env = &cpu->env;
+    int nb_cpus = 0;
 
     /*
      * CPU objects (unlike devices) are not automatically reset on system
@@ -1300,6 +1298,7 @@ void arm_load_kernel(ARMCPU *cpu, MachineState *ms, struct arm_boot_info *info)
      */
     for (cs = first_cpu; cs; cs = CPU_NEXT(cs)) {
         qemu_register_reset(do_cpu_reset, ARM_CPU(cs));
+        nb_cpus++;
     }
 
     /*
@@ -1376,7 +1375,7 @@ void arm_load_kernel(ARMCPU *cpu, MachineState *ms, struct arm_boot_info *info)
     }
 
     if (info->psci_conduit == QEMU_PSCI_CONDUIT_DISABLED &&
-        info->is_linux && info->nb_cpus > 1) {
+        info->is_linux && nb_cpus > 1) {
         /*
          * We're booting Linux but not using PSCI, so for SMP we need
          * to write a custom secondary CPU boot loader stub, and arrange
diff --git a/hw/arm/exynos4_boards.c b/hw/arm/exynos4_boards.c
index 35dd9875da1..ef5bcbc212c 100644
--- a/hw/arm/exynos4_boards.c
+++ b/hw/arm/exynos4_boards.c
@@ -67,7 +67,6 @@ static unsigned long exynos4_board_ram_size[EXYNOS4_NUM_OF_BOARDS] = {
 static struct arm_boot_info exynos4_board_binfo = {
     .loader_start     = EXYNOS4210_BASE_BOOT_ADDR,
     .smp_loader_start = EXYNOS4210_SMP_BOOT_ADDR,
-    .nb_cpus          = EXYNOS4210_NCPUS,
     .write_secondary_boot = exynos4210_write_secondary,
 };
 
diff --git a/hw/arm/highbank.c b/hw/arm/highbank.c
index da681b15708..f12aacea6b8 100644
--- a/hw/arm/highbank.c
+++ b/hw/arm/highbank.c
@@ -324,7 +324,6 @@ static void calxeda_init(MachineState *machine, enum cxmachines machine_id)
      * clear that the value is meaningless.
      */
     highbank_binfo.board_id = -1;
-    highbank_binfo.nb_cpus = smp_cpus;
     highbank_binfo.loader_start = 0;
     highbank_binfo.board_setup_addr = BOARD_SETUP_ADDR;
     highbank_binfo.psci_conduit = QEMU_PSCI_CONDUIT_SMC;
diff --git a/hw/arm/imx25_pdk.c b/hw/arm/imx25_pdk.c
index 6dff0001633..b4f7f4e8a7f 100644
--- a/hw/arm/imx25_pdk.c
+++ b/hw/arm/imx25_pdk.c
@@ -114,8 +114,7 @@ static void imx25_pdk_init(MachineState *machine)
 
     imx25_pdk_binfo.ram_size = machine->ram_size;
     imx25_pdk_binfo.loader_start = FSL_IMX25_SDRAM0_ADDR;
-    imx25_pdk_binfo.board_id = 1771,
-    imx25_pdk_binfo.nb_cpus = 1;
+    imx25_pdk_binfo.board_id = 1771;
 
     for (i = 0; i < FSL_IMX25_NUM_ESDHCS; i++) {
         BusState *bus;
diff --git a/hw/arm/kzm.c b/hw/arm/kzm.c
index 39559c44c29..b1b281c9acb 100644
--- a/hw/arm/kzm.c
+++ b/hw/arm/kzm.c
@@ -124,7 +124,6 @@ static void kzm_init(MachineState *machine)
     }
 
     kzm_binfo.ram_size = machine->ram_size;
-    kzm_binfo.nb_cpus = 1;
 
     if (!qtest_enabled()) {
         arm_load_kernel(&s->soc.cpu, machine, &kzm_binfo);
diff --git a/hw/arm/mcimx6ul-evk.c b/hw/arm/mcimx6ul-evk.c
index 8131518426a..d83c3c380e8 100644
--- a/hw/arm/mcimx6ul-evk.c
+++ b/hw/arm/mcimx6ul-evk.c
@@ -34,7 +34,6 @@ static void mcimx6ul_evk_init(MachineState *machine)
         .loader_start = FSL_IMX6UL_MMDC_ADDR,
         .board_id = -1,
         .ram_size = machine->ram_size,
-        .nb_cpus = machine->smp.cpus,
         .psci_conduit = QEMU_PSCI_CONDUIT_SMC,
     };
 
diff --git a/hw/arm/mcimx7d-sabre.c b/hw/arm/mcimx7d-sabre.c
index ba84fc21920..6182b15f190 100644
--- a/hw/arm/mcimx7d-sabre.c
+++ b/hw/arm/mcimx7d-sabre.c
@@ -36,7 +36,6 @@ static void mcimx7d_sabre_init(MachineState *machine)
         .loader_start = FSL_IMX7_MMDC_ADDR,
         .board_id = -1,
         .ram_size = machine->ram_size,
-        .nb_cpus = machine->smp.cpus,
         .psci_conduit = QEMU_PSCI_CONDUIT_SMC,
     };
 
diff --git a/hw/arm/npcm7xx.c b/hw/arm/npcm7xx.c
index 878c2208e07..d85cc027651 100644
--- a/hw/arm/npcm7xx.c
+++ b/hw/arm/npcm7xx.c
@@ -355,10 +355,7 @@ static struct arm_boot_info npcm7xx_binfo = {
 
 void npcm7xx_load_kernel(MachineState *machine, NPCM7xxState *soc)
 {
-    NPCM7xxClass *sc = NPCM7XX_GET_CLASS(soc);
-
     npcm7xx_binfo.ram_size = machine->ram_size;
-    npcm7xx_binfo.nb_cpus = sc->num_cpus;
 
     arm_load_kernel(&soc->cpu[0], machine, &npcm7xx_binfo);
 }
diff --git a/hw/arm/orangepi.c b/hw/arm/orangepi.c
index 68fe9182414..3ace4748704 100644
--- a/hw/arm/orangepi.c
+++ b/hw/arm/orangepi.c
@@ -25,9 +25,7 @@
 #include "hw/qdev-properties.h"
 #include "hw/arm/allwinner-h3.h"
 
-static struct arm_boot_info orangepi_binfo = {
-    .nb_cpus = AW_H3_NUM_CPUS,
-};
+static struct arm_boot_info orangepi_binfo;
 
 static void orangepi_init(MachineState *machine)
 {
diff --git a/hw/arm/raspi.c b/hw/arm/raspi.c
index b4dd6c1e99a..92d068d1f9d 100644
--- a/hw/arm/raspi.c
+++ b/hw/arm/raspi.c
@@ -204,7 +204,6 @@ static void setup_boot(MachineState *machine, RaspiProcessorId processor_id,
 
     s->binfo.board_id = MACH_TYPE_BCM2708;
     s->binfo.ram_size = ram_size;
-    s->binfo.nb_cpus = machine->smp.cpus;
 
     if (processor_id <= PROCESSOR_ID_BCM2836) {
         /*
diff --git a/hw/arm/realview.c b/hw/arm/realview.c
index ddc70b54a56..7b424e94a5f 100644
--- a/hw/arm/realview.c
+++ b/hw/arm/realview.c
@@ -363,7 +363,6 @@ static void realview_init(MachineState *machine,
     memory_region_add_subregion(sysmem, SMP_BOOT_ADDR, ram_hack);
 
     realview_binfo.ram_size = ram_size;
-    realview_binfo.nb_cpus = smp_cpus;
     realview_binfo.board_id = realview_board_id[board_type];
     realview_binfo.loader_start = (board_type == BOARD_PB_A8 ? 0x70000000 : 0);
     arm_load_kernel(ARM_CPU(first_cpu), machine, &realview_binfo);
diff --git a/hw/arm/sabrelite.c b/hw/arm/sabrelite.c
index cce49aa25cf..41191245b81 100644
--- a/hw/arm/sabrelite.c
+++ b/hw/arm/sabrelite.c
@@ -93,7 +93,6 @@ static void sabrelite_init(MachineState *machine)
     }
 
     sabrelite_binfo.ram_size = machine->ram_size;
-    sabrelite_binfo.nb_cpus = machine->smp.cpus;
     sabrelite_binfo.secure_boot = true;
     sabrelite_binfo.write_secondary_boot = sabrelite_write_secondary;
     sabrelite_binfo.secondary_cpu_reset_hook = sabrelite_reset_secondary;
diff --git a/hw/arm/sbsa-ref.c b/hw/arm/sbsa-ref.c
index dd944553f78..23874019639 100644
--- a/hw/arm/sbsa-ref.c
+++ b/hw/arm/sbsa-ref.c
@@ -776,7 +776,6 @@ static void sbsa_ref_init(MachineState *machine)
     create_secure_ec(secure_sysmem);
 
     sms->bootinfo.ram_size = machine->ram_size;
-    sms->bootinfo.nb_cpus = smp_cpus;
     sms->bootinfo.board_id = -1;
     sms->bootinfo.loader_start = sbsa_ref_memmap[SBSA_MEM].base;
     sms->bootinfo.get_dtb = sbsa_ref_dtb;
diff --git a/hw/arm/vexpress.c b/hw/arm/vexpress.c
index 3e99b7918ab..e1d1983ae65 100644
--- a/hw/arm/vexpress.c
+++ b/hw/arm/vexpress.c
@@ -708,7 +708,6 @@ static void vexpress_common_init(MachineState *machine)
     }
 
     daughterboard->bootinfo.ram_size = machine->ram_size;
-    daughterboard->bootinfo.nb_cpus = machine->smp.cpus;
     daughterboard->bootinfo.board_id = VEXPRESS_BOARD_ID;
     daughterboard->bootinfo.loader_start = daughterboard->loader_start;
     daughterboard->bootinfo.smp_loader_start = map[VE_SRAM];
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 398145a7180..46bf7ceddf3 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -2229,7 +2229,6 @@ static void machvirt_init(MachineState *machine)
     }
 
     vms->bootinfo.ram_size = machine->ram_size;
-    vms->bootinfo.nb_cpus = smp_cpus;
     vms->bootinfo.board_id = -1;
     vms->bootinfo.loader_start = vms->memmap[VIRT_MEM].base;
     vms->bootinfo.get_dtb = machvirt_dtb;
diff --git a/hw/arm/xilinx_zynq.c b/hw/arm/xilinx_zynq.c
index 50e7268396c..3190cc0b8db 100644
--- a/hw/arm/xilinx_zynq.c
+++ b/hw/arm/xilinx_zynq.c
@@ -343,7 +343,6 @@ static void zynq_init(MachineState *machine)
     sysbus_mmio_map(busdev, 0, 0xF8007000);
 
     zynq_binfo.ram_size = machine->ram_size;
-    zynq_binfo.nb_cpus = 1;
     zynq_binfo.board_id = 0xd32;
     zynq_binfo.loader_start = 0;
     zynq_binfo.board_setup_addr = BOARD_SETUP_ADDR;
-- 
2.25.1

[PULL 21/39] hw/arm/boot: Drop existing dtb /psci node rather than retaining it

[Peter Maydell]

If we're using PSCI emulation, we add a /psci node to the device tree
we pass to the guest.  At the moment, if the dtb already has a /psci
node in it, we retain it, rather than replacing it. (This behaviour
was added in commit c39770cd637765 in 2018.)

This is a problem if the existing node doesn't match our PSCI
emulation.  In particular, it might specify the wrong method (HVC vs
SMC), or wrong function IDs for cpu_suspend/cpu_off/etc, in which
case the guest will not get the behaviour it wants when it makes PSCI
calls.

An example of this is trying to boot the highbank or midway board
models using the device tree supplied in the kernel sources: this
device tree includes a /psci node that specifies function IDs that
don't match the (PSCI 0.2 compliant) IDs that QEMU uses.  The dtb
cpu_suspend function ID happens to match the PSCI 0.2 cpu_off ID, so
the guest hangs after booting when the kernel tries to idle the CPU
and instead it gets turned off.

Instead of retaining an existing /psci node, delete it entirely
and replace it with a node whose properties match QEMU's PSCI
emulation behaviour. This matches the way we handle /memory nodes,
where we also delete any existing nodes and write in ones that
match the way QEMU is going to behave.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Niek Linnenbank <nieklinnenbank@gmail.com>
Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Tested-by: Cédric Le Goater <clg@kaod.org>
Tested-by: Niek Linnenbank <nieklinnenbank@gmail.com>
Message-id: 20220127154639.2090164-17-peter.maydell@linaro.org
---
 hw/arm/boot.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/hw/arm/boot.c b/hw/arm/boot.c
index b46f1fe889e..b1e95978f26 100644
--- a/hw/arm/boot.c
+++ b/hw/arm/boot.c
@@ -478,12 +478,13 @@ static void fdt_add_psci_node(void *fdt)
     }
 
     /*
-     * If /psci node is present in provided DTB, assume that no fixup
-     * is necessary and all PSCI configuration should be taken as-is
+     * A pre-existing /psci node might specify function ID values
+     * that don't match QEMU's PSCI implementation. Delete the whole
+     * node and put our own in instead.
      */
     rc = fdt_path_offset(fdt, "/psci");
     if (rc >= 0) {
-        return;
+        qemu_fdt_nop_node(fdt, "/psci");
     }
 
     qemu_fdt_add_subnode(fdt, "/psci");
-- 
2.25.1

[PULL 22/39] hw/arm: versal-virt: Always call arm_load_kernel()

[Peter Maydell]

From: "Edgar E. Iglesias" <edgar.iglesias@xilinx.com>

Always call arm_load_kernel() regardless of kernel_filename being
set. This is needed because arm_load_kernel() sets up reset for
the CPUs.

Fixes: 6f16da53ff (hw/arm: versal: Add a virtual Xilinx Versal board)
Reported-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Message-id: 20220130110313.4045351-2-edgar.iglesias@gmail.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 hw/arm/xlnx-versal-virt.c | 11 ++---------
 1 file changed, 2 insertions(+), 9 deletions(-)

diff --git a/hw/arm/xlnx-versal-virt.c b/hw/arm/xlnx-versal-virt.c
index ef3231cdbb3..7c7baff8b7f 100644
--- a/hw/arm/xlnx-versal-virt.c
+++ b/hw/arm/xlnx-versal-virt.c
@@ -681,20 +681,13 @@ static void versal_virt_init(MachineState *machine)
     s->binfo.get_dtb = versal_virt_get_dtb;
     s->binfo.modify_dtb = versal_virt_modify_dtb;
     s->binfo.psci_conduit = psci_conduit;
-    if (machine->kernel_filename) {
-        arm_load_kernel(&s->soc.fpd.apu.cpu[0], machine, &s->binfo);
-    } else {
-        AddressSpace *as = arm_boot_address_space(&s->soc.fpd.apu.cpu[0],
-                                                  &s->binfo);
+    if (!machine->kernel_filename) {
         /* Some boot-loaders (e.g u-boot) don't like blobs at address 0 (NULL).
          * Offset things by 4K.  */
         s->binfo.loader_start = 0x1000;
         s->binfo.dtb_limit = 0x1000000;
-        if (arm_load_dtb(s->binfo.loader_start,
-                         &s->binfo, s->binfo.dtb_limit, as, machine) < 0) {
-            exit(EXIT_FAILURE);
-        }
     }
+    arm_load_kernel(&s->soc.fpd.apu.cpu[0], machine, &s->binfo);
 
     for (i = 0; i < XLNX_VERSAL_NUM_OSPI_FLASH; i++) {
         BusState *spi_bus;
-- 
2.25.1

[PULL 23/39] arm: force flag recalculation when messing with DAIF

[Peter Maydell]

From: Alex Bennée <alex.bennee@linaro.org>

The recently introduced debug tests in kvm-unit-tests exposed an error
in our handling of singlestep cause by stale hflags. This is caught by
--enable-debug-tcg when running the tests.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reported-by: Andrew Jones <drjones@redhat.com>
Tested-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220202122353.457084-1-alex.bennee@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/helper-a64.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/target/arm/helper-a64.c b/target/arm/helper-a64.c
index d6a6fd73d96..7cf953b1e64 100644
--- a/target/arm/helper-a64.c
+++ b/target/arm/helper-a64.c
@@ -83,12 +83,14 @@ void HELPER(msr_i_daifset)(CPUARMState *env, uint32_t imm)
 {
     daif_check(env, 0x1e, imm, GETPC());
     env->daif |= (imm << 6) & PSTATE_DAIF;
+    arm_rebuild_hflags(env);
 }
 
 void HELPER(msr_i_daifclear)(CPUARMState *env, uint32_t imm)
 {
     daif_check(env, 0x1f, imm, GETPC());
     env->daif &= ~((imm << 6) & PSTATE_DAIF);
+    arm_rebuild_hflags(env);
 }
 
 /* Convert a softfloat float_relation_ (as returned by
-- 
2.25.1

[PULL 24/39] hw/timer/armv7m_systick: Update clock source before enabling timer

[Peter Maydell]

From: Richard Petri <git@rpls.de>

Starting the SysTick timer and changing the clock source a the same time
will result in an error, if the previous clock period was zero. For exmaple,
on the mps2-tz platforms, no refclk is present. Right after reset, the
configured ptimer period is zero, and trying to enabling it will turn it off
right away. E.g., code running on the platform setting

    SysTick->CTRL  = SysTick_CTRL_CLKSOURCE_Msk | SysTick_CTRL_ENABLE_Msk;

should change the clock source and enable the timer on real hardware, but
resulted in an error in qemu.

Signed-off-by: Richard Petri <git@rpls.de>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220201192650.289584-1-git@rpls.de
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 hw/timer/armv7m_systick.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/hw/timer/armv7m_systick.c b/hw/timer/armv7m_systick.c
index 3bd951dd044..5dfe39afe36 100644
--- a/hw/timer/armv7m_systick.c
+++ b/hw/timer/armv7m_systick.c
@@ -149,6 +149,10 @@ static MemTxResult systick_write(void *opaque, hwaddr addr,
         s->control &= 0xfffffff8;
         s->control |= value & 7;
 
+        if ((oldval ^ value) & SYSTICK_CLKSOURCE) {
+            systick_set_period_from_clock(s);
+        }
+
         if ((oldval ^ value) & SYSTICK_ENABLE) {
             if (value & SYSTICK_ENABLE) {
                 ptimer_run(s->ptimer, 0);
@@ -156,10 +160,6 @@ static MemTxResult systick_write(void *opaque, hwaddr addr,
                 ptimer_stop(s->ptimer);
             }
         }
-
-        if ((oldval ^ value) & SYSTICK_CLKSOURCE) {
-            systick_set_period_from_clock(s);
-        }
         ptimer_transaction_commit(s->ptimer);
         break;
     }
-- 
2.25.1

[PULL 25/39] hw/arm/smmuv3: Fix device reset

[Peter Maydell]

From: Eric Auger <eric.auger@redhat.com>

We currently miss a bunch of register resets in the device reset
function. This sometimes prevents the guest from rebooting after
a system_reset (with virtio-blk-pci). For instance, we may get
the following errors:

invalid STE
smmuv3-iommu-memory-region-0-0 translation failed for iova=0x13a9d2000(SMMU_EVT_C_BAD_STE)
Invalid read at addr 0x13A9D2000, size 2, region '(null)', reason: rejected
invalid STE
smmuv3-iommu-memory-region-0-0 translation failed for iova=0x13a9d2000(SMMU_EVT_C_BAD_STE)
Invalid write at addr 0x13A9D2000, size 2, region '(null)', reason: rejected
invalid STE

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Message-id: 20220202111602.627429-1-eric.auger@redhat.com
Fixes: 10a83cb988 ("hw/arm/smmuv3: Skeleton")
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 hw/arm/smmuv3.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/hw/arm/smmuv3.c b/hw/arm/smmuv3.c
index 3b43368be0f..674623aabea 100644
--- a/hw/arm/smmuv3.c
+++ b/hw/arm/smmuv3.c
@@ -278,6 +278,12 @@ static void smmuv3_init_regs(SMMUv3State *s)
     s->features = 0;
     s->sid_split = 0;
     s->aidr = 0x1;
+    s->cr[0] = 0;
+    s->cr0ack = 0;
+    s->irq_ctrl = 0;
+    s->gerror = 0;
+    s->gerrorn = 0;
+    s->statusr = 0;
 }
 
 static int smmu_get_ste(SMMUv3State *s, dma_addr_t addr, STE *buf,
-- 
2.25.1

[PULL 26/39] hw/intc/arm_gicv3_its: Use address_space_map() to access command queue packets

[Peter Maydell]

Currently the ITS accesses each 8-byte doubleword in a 4-doubleword
command packet with a separate address_space_ldq_le() call.  This is
awkward because the individual command processing functions have
ended up with code to handle "load more doublewords out of the
packet", which is both unwieldy and also a potential source of bugs
because it's not obvious when looking at a line that pulls a field
out of the 'value' variable which of the 4 doublewords that variable
currently holds.

Switch to using address_space_map() to map the whole command packet
at once and fish the four doublewords out of it.  Then each process_*
function can start with a few lines of code that extract the fields
it cares about.

This requires us to split out the guts of process_its_cmd() into a
new do_process_its_cmd(), because we were previously overloading the
value and offset arguments as a backdoor way to directly pass the
devid and eventid from a write to GITS_TRANSLATER.  The new
do_process_its_cmd() takes those arguments directly, and
process_its_cmd() is just a wrapper that does the "read fields from
command packet" part.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220201193207.2771604-2-peter.maydell@linaro.org
---
 hw/intc/gicv3_internal.h |   4 +-
 hw/intc/arm_gicv3_its.c  | 208 +++++++++++----------------------------
 2 files changed, 62 insertions(+), 150 deletions(-)

diff --git a/hw/intc/gicv3_internal.h b/hw/intc/gicv3_internal.h
index b1af26df9f4..60c8617e4e4 100644
--- a/hw/intc/gicv3_internal.h
+++ b/hw/intc/gicv3_internal.h
@@ -309,8 +309,8 @@ FIELD(GITS_TYPER, CIL, 36, 1)
 #define LPI_CTE_ENABLED          TABLE_ENTRY_VALID_MASK
 #define LPI_PRIORITY_MASK         0xfc
 
-#define GITS_CMDQ_ENTRY_SIZE               32
-#define NUM_BYTES_IN_DW                     8
+#define GITS_CMDQ_ENTRY_WORDS 4
+#define GITS_CMDQ_ENTRY_SIZE  (GITS_CMDQ_ENTRY_WORDS * sizeof(uint64_t))
 
 #define CMD_MASK                  0xff
 
diff --git a/hw/intc/arm_gicv3_its.c b/hw/intc/arm_gicv3_its.c
index 51d9be4ae6f..b74753fb8fe 100644
--- a/hw/intc/arm_gicv3_its.c
+++ b/hw/intc/arm_gicv3_its.c
@@ -224,11 +224,9 @@ static uint64_t get_dte(GICv3ITSState *s, uint32_t devid, MemTxResult *res)
  * 3. handling of ITS CLEAR command
  * 4. handling of ITS DISCARD command
  */
-static ItsCmdResult process_its_cmd(GICv3ITSState *s, uint64_t value,
-                                    uint32_t offset, ItsCmdType cmd)
+static ItsCmdResult do_process_its_cmd(GICv3ITSState *s, uint32_t devid,
+                                       uint32_t eventid, ItsCmdType cmd)
 {
-    AddressSpace *as = &s->gicv3->dma_as;
-    uint32_t devid, eventid;
     MemTxResult res = MEMTX_OK;
     bool dte_valid;
     uint64_t dte = 0;
@@ -240,22 +238,6 @@ static ItsCmdResult process_its_cmd(GICv3ITSState *s, uint64_t value,
     bool cte_valid = false;
     uint64_t rdbase;
 
-    if (cmd == NONE) {
-        devid = offset;
-    } else {
-        devid = ((value & DEVID_MASK) >> DEVID_SHIFT);
-
-        offset += NUM_BYTES_IN_DW;
-        value = address_space_ldq_le(as, s->cq.base_addr + offset,
-                                     MEMTXATTRS_UNSPECIFIED, &res);
-    }
-
-    if (res != MEMTX_OK) {
-        return CMD_STALL;
-    }
-
-    eventid = (value & EVENTID_MASK);
-
     if (devid >= s->dt.num_entries) {
         qemu_log_mask(LOG_GUEST_ERROR,
                       "%s: invalid command attributes: devid %d>=%d",
@@ -342,11 +324,19 @@ static ItsCmdResult process_its_cmd(GICv3ITSState *s, uint64_t value,
     }
     return CMD_CONTINUE;
 }
-
-static ItsCmdResult process_mapti(GICv3ITSState *s, uint64_t value,
-                                  uint32_t offset, bool ignore_pInt)
+static ItsCmdResult process_its_cmd(GICv3ITSState *s, const uint64_t *cmdpkt,
+                                    ItsCmdType cmd)
+{
+    uint32_t devid, eventid;
+
+    devid = (cmdpkt[0] & DEVID_MASK) >> DEVID_SHIFT;
+    eventid = cmdpkt[1] & EVENTID_MASK;
+    return do_process_its_cmd(s, devid, eventid, cmd);
+}
+
+static ItsCmdResult process_mapti(GICv3ITSState *s, const uint64_t *cmdpkt,
+                                  bool ignore_pInt)
 {
-    AddressSpace *as = &s->gicv3->dma_as;
     uint32_t devid, eventid;
     uint32_t pIntid = 0;
     uint64_t num_eventids;
@@ -357,32 +347,16 @@ static ItsCmdResult process_mapti(GICv3ITSState *s, uint64_t value,
     uint64_t dte = 0;
     IteEntry ite = {};
 
-    devid = ((value & DEVID_MASK) >> DEVID_SHIFT);
-    offset += NUM_BYTES_IN_DW;
-    value = address_space_ldq_le(as, s->cq.base_addr + offset,
-                                 MEMTXATTRS_UNSPECIFIED, &res);
-
-    if (res != MEMTX_OK) {
-        return CMD_STALL;
-    }
-
-    eventid = (value & EVENTID_MASK);
+    devid = (cmdpkt[0] & DEVID_MASK) >> DEVID_SHIFT;
+    eventid = cmdpkt[1] & EVENTID_MASK;
 
     if (ignore_pInt) {
         pIntid = eventid;
     } else {
-        pIntid = ((value & pINTID_MASK) >> pINTID_SHIFT);
+        pIntid = (cmdpkt[1] & pINTID_MASK) >> pINTID_SHIFT;
     }
 
-    offset += NUM_BYTES_IN_DW;
-    value = address_space_ldq_le(as, s->cq.base_addr + offset,
-                                 MEMTXATTRS_UNSPECIFIED, &res);
-
-    if (res != MEMTX_OK) {
-        return CMD_STALL;
-    }
-
-    icid = value & ICID_MASK;
+    icid = cmdpkt[2] & ICID_MASK;
 
     if (devid >= s->dt.num_entries) {
         qemu_log_mask(LOG_GUEST_ERROR,
@@ -459,31 +433,18 @@ static bool update_cte(GICv3ITSState *s, uint16_t icid, bool valid,
     return res == MEMTX_OK;
 }
 
-static ItsCmdResult process_mapc(GICv3ITSState *s, uint32_t offset)
+static ItsCmdResult process_mapc(GICv3ITSState *s, const uint64_t *cmdpkt)
 {
-    AddressSpace *as = &s->gicv3->dma_as;
     uint16_t icid;
     uint64_t rdbase;
     bool valid;
-    MemTxResult res = MEMTX_OK;
-    uint64_t value;
 
-    offset += NUM_BYTES_IN_DW;
-    offset += NUM_BYTES_IN_DW;
+    icid = cmdpkt[2] & ICID_MASK;
 
-    value = address_space_ldq_le(as, s->cq.base_addr + offset,
-                                 MEMTXATTRS_UNSPECIFIED, &res);
-
-    if (res != MEMTX_OK) {
-        return CMD_STALL;
-    }
-
-    icid = value & ICID_MASK;
-
-    rdbase = (value & R_MAPC_RDBASE_MASK) >> R_MAPC_RDBASE_SHIFT;
+    rdbase = (cmdpkt[2] & R_MAPC_RDBASE_MASK) >> R_MAPC_RDBASE_SHIFT;
     rdbase &= RDBASE_PROCNUM_MASK;
 
-    valid = (value & CMD_FIELD_VALID_MASK);
+    valid = cmdpkt[2] & CMD_FIELD_VALID_MASK;
 
     if ((icid >= s->ct.num_entries) || (rdbase >= s->gicv3->num_cpu)) {
         qemu_log_mask(LOG_GUEST_ERROR,
@@ -532,39 +493,17 @@ static bool update_dte(GICv3ITSState *s, uint32_t devid, bool valid,
     return res == MEMTX_OK;
 }
 
-static ItsCmdResult process_mapd(GICv3ITSState *s, uint64_t value,
-                                 uint32_t offset)
+static ItsCmdResult process_mapd(GICv3ITSState *s, const uint64_t *cmdpkt)
 {
-    AddressSpace *as = &s->gicv3->dma_as;
     uint32_t devid;
     uint8_t size;
     uint64_t itt_addr;
     bool valid;
-    MemTxResult res = MEMTX_OK;
 
-    devid = ((value & DEVID_MASK) >> DEVID_SHIFT);
-
-    offset += NUM_BYTES_IN_DW;
-    value = address_space_ldq_le(as, s->cq.base_addr + offset,
-                                 MEMTXATTRS_UNSPECIFIED, &res);
-
-    if (res != MEMTX_OK) {
-        return CMD_STALL;
-    }
-
-    size = (value & SIZE_MASK);
-
-    offset += NUM_BYTES_IN_DW;
-    value = address_space_ldq_le(as, s->cq.base_addr + offset,
-                                 MEMTXATTRS_UNSPECIFIED, &res);
-
-    if (res != MEMTX_OK) {
-        return CMD_STALL;
-    }
-
-    itt_addr = (value & ITTADDR_MASK) >> ITTADDR_SHIFT;
-
-    valid = (value & CMD_FIELD_VALID_MASK);
+    devid = (cmdpkt[0] & DEVID_MASK) >> DEVID_SHIFT;
+    size = cmdpkt[1] & SIZE_MASK;
+    itt_addr = (cmdpkt[2] & ITTADDR_MASK) >> ITTADDR_SHIFT;
+    valid = cmdpkt[2] & CMD_FIELD_VALID_MASK;
 
     if ((devid >= s->dt.num_entries) ||
         (size > FIELD_EX64(s->typer, GITS_TYPER, IDBITS))) {
@@ -582,23 +521,13 @@ static ItsCmdResult process_mapd(GICv3ITSState *s, uint64_t value,
     return update_dte(s, devid, valid, size, itt_addr) ? CMD_CONTINUE : CMD_STALL;
 }
 
-static ItsCmdResult process_movall(GICv3ITSState *s, uint64_t value,
-                                   uint32_t offset)
+static ItsCmdResult process_movall(GICv3ITSState *s, const uint64_t *cmdpkt)
 {
-    AddressSpace *as = &s->gicv3->dma_as;
-    MemTxResult res = MEMTX_OK;
     uint64_t rd1, rd2;
 
-    /* No fields in dwords 0 or 1 */
-    offset += NUM_BYTES_IN_DW;
-    offset += NUM_BYTES_IN_DW;
-    value = address_space_ldq_le(as, s->cq.base_addr + offset,
-                                 MEMTXATTRS_UNSPECIFIED, &res);
-    if (res != MEMTX_OK) {
-        return CMD_STALL;
-    }
+    rd1 = FIELD_EX64(cmdpkt[2], MOVALL_2, RDBASE1);
+    rd2 = FIELD_EX64(cmdpkt[3], MOVALL_3, RDBASE2);
 
-    rd1 = FIELD_EX64(value, MOVALL_2, RDBASE1);
     if (rd1 >= s->gicv3->num_cpu) {
         qemu_log_mask(LOG_GUEST_ERROR,
                       "%s: RDBASE1 %" PRId64
@@ -606,15 +535,6 @@ static ItsCmdResult process_movall(GICv3ITSState *s, uint64_t value,
                       __func__, rd1, s->gicv3->num_cpu);
         return CMD_CONTINUE;
     }
-
-    offset += NUM_BYTES_IN_DW;
-    value = address_space_ldq_le(as, s->cq.base_addr + offset,
-                                 MEMTXATTRS_UNSPECIFIED, &res);
-    if (res != MEMTX_OK) {
-        return CMD_STALL;
-    }
-
-    rd2 = FIELD_EX64(value, MOVALL_3, RDBASE2);
     if (rd2 >= s->gicv3->num_cpu) {
         qemu_log_mask(LOG_GUEST_ERROR,
                       "%s: RDBASE2 %" PRId64
@@ -634,10 +554,8 @@ static ItsCmdResult process_movall(GICv3ITSState *s, uint64_t value,
     return CMD_CONTINUE;
 }
 
-static ItsCmdResult process_movi(GICv3ITSState *s, uint64_t value,
-                                 uint32_t offset)
+static ItsCmdResult process_movi(GICv3ITSState *s, const uint64_t *cmdpkt)
 {
-    AddressSpace *as = &s->gicv3->dma_as;
     MemTxResult res = MEMTX_OK;
     uint32_t devid, eventid, intid;
     uint16_t old_icid, new_icid;
@@ -648,23 +566,9 @@ static ItsCmdResult process_movi(GICv3ITSState *s, uint64_t value,
     uint64_t num_eventids;
     IteEntry ite = {};
 
-    devid = FIELD_EX64(value, MOVI_0, DEVICEID);
-
-    offset += NUM_BYTES_IN_DW;
-    value = address_space_ldq_le(as, s->cq.base_addr + offset,
-                                 MEMTXATTRS_UNSPECIFIED, &res);
-    if (res != MEMTX_OK) {
-        return CMD_STALL;
-    }
-    eventid = FIELD_EX64(value, MOVI_1, EVENTID);
-
-    offset += NUM_BYTES_IN_DW;
-    value = address_space_ldq_le(as, s->cq.base_addr + offset,
-                                 MEMTXATTRS_UNSPECIFIED, &res);
-    if (res != MEMTX_OK) {
-        return CMD_STALL;
-    }
-    new_icid = FIELD_EX64(value, MOVI_2, ICID);
+    devid = FIELD_EX64(cmdpkt[0], MOVI_0, DEVICEID);
+    eventid = FIELD_EX64(cmdpkt[1], MOVI_1, EVENTID);
+    new_icid = FIELD_EX64(cmdpkt[2], MOVI_2, ICID);
 
     if (devid >= s->dt.num_entries) {
         qemu_log_mask(LOG_GUEST_ERROR,
@@ -786,9 +690,7 @@ static void process_cmdq(GICv3ITSState *s)
     uint32_t wr_offset = 0;
     uint32_t rd_offset = 0;
     uint32_t cq_offset = 0;
-    uint64_t data;
     AddressSpace *as = &s->gicv3->dma_as;
-    MemTxResult res = MEMTX_OK;
     uint8_t cmd;
     int i;
 
@@ -816,28 +718,40 @@ static void process_cmdq(GICv3ITSState *s)
 
     while (wr_offset != rd_offset) {
         ItsCmdResult result = CMD_CONTINUE;
+        void *hostmem;
+        hwaddr buflen;
+        uint64_t cmdpkt[GITS_CMDQ_ENTRY_WORDS];
 
         cq_offset = (rd_offset * GITS_CMDQ_ENTRY_SIZE);
-        data = address_space_ldq_le(as, s->cq.base_addr + cq_offset,
-                                    MEMTXATTRS_UNSPECIFIED, &res);
-        if (res != MEMTX_OK) {
+
+        buflen = GITS_CMDQ_ENTRY_SIZE;
+        hostmem = address_space_map(as, s->cq.base_addr + cq_offset,
+                                    &buflen, false, MEMTXATTRS_UNSPECIFIED);
+        if (!hostmem || buflen != GITS_CMDQ_ENTRY_SIZE) {
+            if (hostmem) {
+                address_space_unmap(as, hostmem, buflen, false, 0);
+            }
             s->creadr = FIELD_DP64(s->creadr, GITS_CREADR, STALLED, 1);
             qemu_log_mask(LOG_GUEST_ERROR,
                           "%s: could not read command at 0x%" PRIx64 "\n",
                           __func__, s->cq.base_addr + cq_offset);
             break;
         }
+        for (i = 0; i < ARRAY_SIZE(cmdpkt); i++) {
+            cmdpkt[i] = ldq_le_p(hostmem + i * sizeof(uint64_t));
+        }
+        address_space_unmap(as, hostmem, buflen, false, 0);
 
-        cmd = (data & CMD_MASK);
+        cmd = cmdpkt[0] & CMD_MASK;
 
         trace_gicv3_its_process_command(rd_offset, cmd);
 
         switch (cmd) {
         case GITS_CMD_INT:
-            result = process_its_cmd(s, data, cq_offset, INTERRUPT);
+            result = process_its_cmd(s, cmdpkt, INTERRUPT);
             break;
         case GITS_CMD_CLEAR:
-            result = process_its_cmd(s, data, cq_offset, CLEAR);
+            result = process_its_cmd(s, cmdpkt, CLEAR);
             break;
         case GITS_CMD_SYNC:
             /*
@@ -848,19 +762,19 @@ static void process_cmdq(GICv3ITSState *s)
              */
             break;
         case GITS_CMD_MAPD:
-            result = process_mapd(s, data, cq_offset);
+            result = process_mapd(s, cmdpkt);
             break;
         case GITS_CMD_MAPC:
-            result = process_mapc(s, cq_offset);
+            result = process_mapc(s, cmdpkt);
             break;
         case GITS_CMD_MAPTI:
-            result = process_mapti(s, data, cq_offset, false);
+            result = process_mapti(s, cmdpkt, false);
             break;
         case GITS_CMD_MAPI:
-            result = process_mapti(s, data, cq_offset, true);
+            result = process_mapti(s, cmdpkt, true);
             break;
         case GITS_CMD_DISCARD:
-            result = process_its_cmd(s, data, cq_offset, DISCARD);
+            result = process_its_cmd(s, cmdpkt, DISCARD);
             break;
         case GITS_CMD_INV:
         case GITS_CMD_INVALL:
@@ -875,10 +789,10 @@ static void process_cmdq(GICv3ITSState *s)
             }
             break;
         case GITS_CMD_MOVI:
-            result = process_movi(s, data, cq_offset);
+            result = process_movi(s, cmdpkt);
             break;
         case GITS_CMD_MOVALL:
-            result = process_movall(s, data, cq_offset);
+            result = process_movall(s, cmdpkt);
             break;
         default:
             break;
@@ -1032,15 +946,13 @@ static MemTxResult gicv3_its_translation_write(void *opaque, hwaddr offset,
 {
     GICv3ITSState *s = (GICv3ITSState *)opaque;
     bool result = true;
-    uint32_t devid = 0;
 
     trace_gicv3_its_translation_write(offset, data, size, attrs.requester_id);
 
     switch (offset) {
     case GITS_TRANSLATER:
         if (s->ctlr & R_GITS_CTLR_ENABLED_MASK) {
-            devid = attrs.requester_id;
-            result = process_its_cmd(s, data, devid, NONE);
+            result = do_process_its_cmd(s, attrs.requester_id, data, NONE);
         }
         break;
     default:
-- 
2.25.1

[PULL 27/39] hw/intc/arm_gicv3_its: Keep DTEs as a struct, not a raw uint64_t

[Peter Maydell]

In the ITS, a DTE is an entry in the device table, which contains
multiple fields. Currently the function get_dte() which reads one
entry from the device table returns it as a raw 64-bit integer,
which we then pass around in that form, only extracting fields
from it as we need them.

Create a real C struct with the same fields as the DTE, and
populate it in get_dte(), so that that function and update_dte()
are the only ones that need to care about the in-guest-memory
format of the DTE.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220201193207.2771604-3-peter.maydell@linaro.org
---
 hw/intc/arm_gicv3_its.c | 111 ++++++++++++++++++++--------------------
 1 file changed, 56 insertions(+), 55 deletions(-)

diff --git a/hw/intc/arm_gicv3_its.c b/hw/intc/arm_gicv3_its.c
index b74753fb8fe..6d70d7d59e2 100644
--- a/hw/intc/arm_gicv3_its.c
+++ b/hw/intc/arm_gicv3_its.c
@@ -46,6 +46,12 @@ typedef struct {
     uint64_t itel;
 } IteEntry;
 
+typedef struct DTEntry {
+    bool valid;
+    unsigned size;
+    uint64_t ittaddr;
+} DTEntry;
+
 /*
  * The ITS spec permits a range of CONSTRAINED UNPREDICTABLE options
  * if a command parameter is not correct. These include both "stall
@@ -143,22 +149,18 @@ static bool get_cte(GICv3ITSState *s, uint16_t icid, uint64_t *cte,
     return FIELD_EX64(*cte, CTE, VALID);
 }
 
-static bool update_ite(GICv3ITSState *s, uint32_t eventid, uint64_t dte,
+static bool update_ite(GICv3ITSState *s, uint32_t eventid, const DTEntry *dte,
                        IteEntry ite)
 {
     AddressSpace *as = &s->gicv3->dma_as;
-    uint64_t itt_addr;
     MemTxResult res = MEMTX_OK;
 
-    itt_addr = FIELD_EX64(dte, DTE, ITTADDR);
-    itt_addr <<= ITTADDR_SHIFT; /* 256 byte aligned */
-
-    address_space_stq_le(as, itt_addr + (eventid * (sizeof(uint64_t) +
+    address_space_stq_le(as, dte->ittaddr + (eventid * (sizeof(uint64_t) +
                          sizeof(uint32_t))), ite.itel, MEMTXATTRS_UNSPECIFIED,
                          &res);
 
     if (res == MEMTX_OK) {
-        address_space_stl_le(as, itt_addr + (eventid * (sizeof(uint64_t) +
+        address_space_stl_le(as, dte->ittaddr + (eventid * (sizeof(uint64_t) +
                              sizeof(uint32_t))) + sizeof(uint32_t), ite.iteh,
                              MEMTXATTRS_UNSPECIFIED, &res);
     }
@@ -169,24 +171,20 @@ static bool update_ite(GICv3ITSState *s, uint32_t eventid, uint64_t dte,
     }
 }
 
-static bool get_ite(GICv3ITSState *s, uint32_t eventid, uint64_t dte,
+static bool get_ite(GICv3ITSState *s, uint32_t eventid, const DTEntry *dte,
                     uint16_t *icid, uint32_t *pIntid, MemTxResult *res)
 {
     AddressSpace *as = &s->gicv3->dma_as;
-    uint64_t itt_addr;
     bool status = false;
     IteEntry ite = {};
 
-    itt_addr = FIELD_EX64(dte, DTE, ITTADDR);
-    itt_addr <<= ITTADDR_SHIFT; /* 256 byte aligned */
-
-    ite.itel = address_space_ldq_le(as, itt_addr +
+    ite.itel = address_space_ldq_le(as, dte->ittaddr +
                                     (eventid * (sizeof(uint64_t) +
                                     sizeof(uint32_t))), MEMTXATTRS_UNSPECIFIED,
                                     res);
 
     if (*res == MEMTX_OK) {
-        ite.iteh = address_space_ldl_le(as, itt_addr +
+        ite.iteh = address_space_ldl_le(as, dte->ittaddr +
                                         (eventid * (sizeof(uint64_t) +
                                         sizeof(uint32_t))) + sizeof(uint32_t),
                                         MEMTXATTRS_UNSPECIFIED, res);
@@ -205,15 +203,33 @@ static bool get_ite(GICv3ITSState *s, uint32_t eventid, uint64_t dte,
     return status;
 }
 
-static uint64_t get_dte(GICv3ITSState *s, uint32_t devid, MemTxResult *res)
+/*
+ * Read the Device Table entry at index @devid. On success (including
+ * successfully determining that there is no valid DTE for this index),
+ * we return MEMTX_OK and populate the DTEntry struct accordingly.
+ * If there is an error reading memory then we return the error code.
+ */
+static MemTxResult get_dte(GICv3ITSState *s, uint32_t devid, DTEntry *dte)
 {
+    MemTxResult res = MEMTX_OK;
     AddressSpace *as = &s->gicv3->dma_as;
-    uint64_t entry_addr = table_entry_addr(s, &s->dt, devid, res);
+    uint64_t entry_addr = table_entry_addr(s, &s->dt, devid, &res);
+    uint64_t dteval;
 
     if (entry_addr == -1) {
-        return 0; /* a DTE entry with the Valid bit clear */
+        /* No L2 table entry, i.e. no valid DTE, or a memory error */
+        dte->valid = false;
+        return res;
     }
-    return address_space_ldq_le(as, entry_addr, MEMTXATTRS_UNSPECIFIED, res);
+    dteval = address_space_ldq_le(as, entry_addr, MEMTXATTRS_UNSPECIFIED, &res);
+    if (res != MEMTX_OK) {
+        return res;
+    }
+    dte->valid = FIELD_EX64(dteval, DTE, VALID);
+    dte->size = FIELD_EX64(dteval, DTE, SIZE);
+    /* DTE word field stores bits [51:8] of the ITT address */
+    dte->ittaddr = FIELD_EX64(dteval, DTE, ITTADDR) << ITTADDR_SHIFT;
+    return MEMTX_OK;
 }
 
 /*
@@ -228,8 +244,6 @@ static ItsCmdResult do_process_its_cmd(GICv3ITSState *s, uint32_t devid,
                                        uint32_t eventid, ItsCmdType cmd)
 {
     MemTxResult res = MEMTX_OK;
-    bool dte_valid;
-    uint64_t dte = 0;
     uint64_t num_eventids;
     uint16_t icid = 0;
     uint32_t pIntid = 0;
@@ -237,6 +251,7 @@ static ItsCmdResult do_process_its_cmd(GICv3ITSState *s, uint32_t devid,
     uint64_t cte = 0;
     bool cte_valid = false;
     uint64_t rdbase;
+    DTEntry dte;
 
     if (devid >= s->dt.num_entries) {
         qemu_log_mask(LOG_GUEST_ERROR,
@@ -245,23 +260,17 @@ static ItsCmdResult do_process_its_cmd(GICv3ITSState *s, uint32_t devid,
         return CMD_CONTINUE;
     }
 
-    dte = get_dte(s, devid, &res);
-
-    if (res != MEMTX_OK) {
+    if (get_dte(s, devid, &dte) != MEMTX_OK) {
         return CMD_STALL;
     }
-    dte_valid = FIELD_EX64(dte, DTE, VALID);
-
-    if (!dte_valid) {
+    if (!dte.valid) {
         qemu_log_mask(LOG_GUEST_ERROR,
                       "%s: invalid command attributes: "
-                      "invalid dte: %"PRIx64" for %d\n",
-                      __func__, dte, devid);
+                      "invalid dte for %d\n", __func__, devid);
         return CMD_CONTINUE;
     }
 
-    num_eventids = 1ULL << (FIELD_EX64(dte, DTE, SIZE) + 1);
-
+    num_eventids = 1ULL << (dte.size + 1);
     if (eventid >= num_eventids) {
         qemu_log_mask(LOG_GUEST_ERROR,
                       "%s: invalid command attributes: eventid %d >= %"
@@ -270,7 +279,7 @@ static ItsCmdResult do_process_its_cmd(GICv3ITSState *s, uint32_t devid,
         return CMD_CONTINUE;
     }
 
-    ite_valid = get_ite(s, eventid, dte, &icid, &pIntid, &res);
+    ite_valid = get_ite(s, eventid, &dte, &icid, &pIntid, &res);
     if (res != MEMTX_OK) {
         return CMD_STALL;
     }
@@ -320,7 +329,7 @@ static ItsCmdResult do_process_its_cmd(GICv3ITSState *s, uint32_t devid,
     if (cmd == DISCARD) {
         IteEntry ite = {};
         /* remove mapping from interrupt translation table */
-        return update_ite(s, eventid, dte, ite) ? CMD_CONTINUE : CMD_STALL;
+        return update_ite(s, eventid, &dte, ite) ? CMD_CONTINUE : CMD_STALL;
     }
     return CMD_CONTINUE;
 }
@@ -341,11 +350,9 @@ static ItsCmdResult process_mapti(GICv3ITSState *s, const uint64_t *cmdpkt,
     uint32_t pIntid = 0;
     uint64_t num_eventids;
     uint32_t num_intids;
-    bool dte_valid;
-    MemTxResult res = MEMTX_OK;
     uint16_t icid = 0;
-    uint64_t dte = 0;
     IteEntry ite = {};
+    DTEntry dte;
 
     devid = (cmdpkt[0] & DEVID_MASK) >> DEVID_SHIFT;
     eventid = cmdpkt[1] & EVENTID_MASK;
@@ -365,24 +372,21 @@ static ItsCmdResult process_mapti(GICv3ITSState *s, const uint64_t *cmdpkt,
         return CMD_CONTINUE;
     }
 
-    dte = get_dte(s, devid, &res);
-
-    if (res != MEMTX_OK) {
+    if (get_dte(s, devid, &dte) != MEMTX_OK) {
         return CMD_STALL;
     }
-    dte_valid = FIELD_EX64(dte, DTE, VALID);
-    num_eventids = 1ULL << (FIELD_EX64(dte, DTE, SIZE) + 1);
+    num_eventids = 1ULL << (dte.size + 1);
     num_intids = 1ULL << (GICD_TYPER_IDBITS + 1);
 
     if ((icid >= s->ct.num_entries)
-            || !dte_valid || (eventid >= num_eventids) ||
+            || !dte.valid || (eventid >= num_eventids) ||
             (((pIntid < GICV3_LPI_INTID_START) || (pIntid >= num_intids)) &&
              (pIntid != INTID_SPURIOUS))) {
         qemu_log_mask(LOG_GUEST_ERROR,
                       "%s: invalid command attributes "
                       "icid %d or eventid %d or pIntid %d or"
                       "unmapped dte %d\n", __func__, icid, eventid,
-                      pIntid, dte_valid);
+                      pIntid, dte.valid);
         /*
          * in this implementation, in case of error
          * we ignore this command and move onto the next
@@ -392,13 +396,13 @@ static ItsCmdResult process_mapti(GICv3ITSState *s, const uint64_t *cmdpkt,
     }
 
     /* add ite entry to interrupt translation table */
-    ite.itel = FIELD_DP64(ite.itel, ITE_L, VALID, dte_valid);
+    ite.itel = FIELD_DP64(ite.itel, ITE_L, VALID, true);
     ite.itel = FIELD_DP64(ite.itel, ITE_L, INTTYPE, ITE_INTTYPE_PHYSICAL);
     ite.itel = FIELD_DP64(ite.itel, ITE_L, INTID, pIntid);
     ite.itel = FIELD_DP64(ite.itel, ITE_L, DOORBELL, INTID_SPURIOUS);
     ite.iteh = FIELD_DP32(ite.iteh, ITE_H, ICID, icid);
 
-    return update_ite(s, eventid, dte, ite) ? CMD_CONTINUE : CMD_STALL;
+    return update_ite(s, eventid, &dte, ite) ? CMD_CONTINUE : CMD_STALL;
 }
 
 static bool update_cte(GICv3ITSState *s, uint16_t icid, bool valid,
@@ -561,10 +565,10 @@ static ItsCmdResult process_movi(GICv3ITSState *s, const uint64_t *cmdpkt)
     uint16_t old_icid, new_icid;
     uint64_t old_cte, new_cte;
     uint64_t old_rdbase, new_rdbase;
-    uint64_t dte;
-    bool dte_valid, ite_valid, cte_valid;
+    bool ite_valid, cte_valid;
     uint64_t num_eventids;
     IteEntry ite = {};
+    DTEntry dte;
 
     devid = FIELD_EX64(cmdpkt[0], MOVI_0, DEVICEID);
     eventid = FIELD_EX64(cmdpkt[1], MOVI_1, EVENTID);
@@ -576,21 +580,18 @@ static ItsCmdResult process_movi(GICv3ITSState *s, const uint64_t *cmdpkt)
                       __func__, devid, s->dt.num_entries);
         return CMD_CONTINUE;
     }
-    dte = get_dte(s, devid, &res);
-    if (res != MEMTX_OK) {
+    if (get_dte(s, devid, &dte) != MEMTX_OK) {
         return CMD_STALL;
     }
 
-    dte_valid = FIELD_EX64(dte, DTE, VALID);
-    if (!dte_valid) {
+    if (!dte.valid) {
         qemu_log_mask(LOG_GUEST_ERROR,
                       "%s: invalid command attributes: "
-                      "invalid dte: %"PRIx64" for %d\n",
-                      __func__, dte, devid);
+                      "invalid dte for %d\n", __func__, devid);
         return CMD_CONTINUE;
     }
 
-    num_eventids = 1ULL << (FIELD_EX64(dte, DTE, SIZE) + 1);
+    num_eventids = 1ULL << (dte.size + 1);
     if (eventid >= num_eventids) {
         qemu_log_mask(LOG_GUEST_ERROR,
                       "%s: invalid command attributes: eventid %d >= %"
@@ -599,7 +600,7 @@ static ItsCmdResult process_movi(GICv3ITSState *s, const uint64_t *cmdpkt)
         return CMD_CONTINUE;
     }
 
-    ite_valid = get_ite(s, eventid, dte, &old_icid, &intid, &res);
+    ite_valid = get_ite(s, eventid, &dte, &old_icid, &intid, &res);
     if (res != MEMTX_OK) {
         return CMD_STALL;
     }
@@ -678,7 +679,7 @@ static ItsCmdResult process_movi(GICv3ITSState *s, const uint64_t *cmdpkt)
     ite.itel = FIELD_DP64(ite.itel, ITE_L, INTID, intid);
     ite.itel = FIELD_DP64(ite.itel, ITE_L, DOORBELL, INTID_SPURIOUS);
     ite.iteh = FIELD_DP32(ite.iteh, ITE_H, ICID, new_icid);
-    return update_ite(s, eventid, dte, ite) ? CMD_CONTINUE : CMD_STALL;
+    return update_ite(s, eventid, &dte, ite) ? CMD_CONTINUE : CMD_STALL;
 }
 
 /*
-- 
2.25.1

[PULL 28/39] hw/intc/arm_gicv3_its: Pass DTEntry to update_dte()

[Peter Maydell]

Make update_dte() take a DTEntry struct rather than all the fields of
the new DTE as separate arguments.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220201193207.2771604-4-peter.maydell@linaro.org
---
 hw/intc/arm_gicv3_its.c | 35 ++++++++++++++++++-----------------
 1 file changed, 18 insertions(+), 17 deletions(-)

diff --git a/hw/intc/arm_gicv3_its.c b/hw/intc/arm_gicv3_its.c
index 6d70d7d59e2..1856210e79a 100644
--- a/hw/intc/arm_gicv3_its.c
+++ b/hw/intc/arm_gicv3_its.c
@@ -465,20 +465,23 @@ static ItsCmdResult process_mapc(GICv3ITSState *s, const uint64_t *cmdpkt)
     return update_cte(s, icid, valid, rdbase) ? CMD_CONTINUE : CMD_STALL;
 }
 
-static bool update_dte(GICv3ITSState *s, uint32_t devid, bool valid,
-                       uint8_t size, uint64_t itt_addr)
+/*
+ * Update the Device Table entry for @devid to @dte. Returns true
+ * on success, false if there was a memory access error.
+ */
+static bool update_dte(GICv3ITSState *s, uint32_t devid, const DTEntry *dte)
 {
     AddressSpace *as = &s->gicv3->dma_as;
     uint64_t entry_addr;
-    uint64_t dte = 0;
+    uint64_t dteval = 0;
     MemTxResult res = MEMTX_OK;
 
     if (s->dt.valid) {
-        if (valid) {
+        if (dte->valid) {
             /* add mapping entry to device table */
-            dte = FIELD_DP64(dte, DTE, VALID, 1);
-            dte = FIELD_DP64(dte, DTE, SIZE, size);
-            dte = FIELD_DP64(dte, DTE, ITTADDR, itt_addr);
+            dteval = FIELD_DP64(dteval, DTE, VALID, 1);
+            dteval = FIELD_DP64(dteval, DTE, SIZE, dte->size);
+            dteval = FIELD_DP64(dteval, DTE, ITTADDR, dte->ittaddr);
         }
     } else {
         return true;
@@ -493,27 +496,25 @@ static bool update_dte(GICv3ITSState *s, uint32_t devid, bool valid,
         /* No L2 table for this index: discard write and continue */
         return true;
     }
-    address_space_stq_le(as, entry_addr, dte, MEMTXATTRS_UNSPECIFIED, &res);
+    address_space_stq_le(as, entry_addr, dteval, MEMTXATTRS_UNSPECIFIED, &res);
     return res == MEMTX_OK;
 }
 
 static ItsCmdResult process_mapd(GICv3ITSState *s, const uint64_t *cmdpkt)
 {
     uint32_t devid;
-    uint8_t size;
-    uint64_t itt_addr;
-    bool valid;
+    DTEntry dte;
 
     devid = (cmdpkt[0] & DEVID_MASK) >> DEVID_SHIFT;
-    size = cmdpkt[1] & SIZE_MASK;
-    itt_addr = (cmdpkt[2] & ITTADDR_MASK) >> ITTADDR_SHIFT;
-    valid = cmdpkt[2] & CMD_FIELD_VALID_MASK;
+    dte.size = cmdpkt[1] & SIZE_MASK;
+    dte.ittaddr = (cmdpkt[2] & ITTADDR_MASK) >> ITTADDR_SHIFT;
+    dte.valid = cmdpkt[2] & CMD_FIELD_VALID_MASK;
 
     if ((devid >= s->dt.num_entries) ||
-        (size > FIELD_EX64(s->typer, GITS_TYPER, IDBITS))) {
+        (dte.size > FIELD_EX64(s->typer, GITS_TYPER, IDBITS))) {
         qemu_log_mask(LOG_GUEST_ERROR,
                       "ITS MAPD: invalid device table attributes "
-                      "devid %d or size %d\n", devid, size);
+                      "devid %d or size %d\n", devid, dte.size);
         /*
          * in this implementation, in case of error
          * we ignore this command and move onto the next
@@ -522,7 +523,7 @@ static ItsCmdResult process_mapd(GICv3ITSState *s, const uint64_t *cmdpkt)
         return CMD_CONTINUE;
     }
 
-    return update_dte(s, devid, valid, size, itt_addr) ? CMD_CONTINUE : CMD_STALL;
+    return update_dte(s, devid, &dte) ? CMD_CONTINUE : CMD_STALL;
 }
 
 static ItsCmdResult process_movall(GICv3ITSState *s, const uint64_t *cmdpkt)
-- 
2.25.1

[PULL 29/39] hw/intc/arm_gicv3_its: Keep CTEs as a struct, not a raw uint64_t

[Peter Maydell]

In the ITS, a CTE is an entry in the collection table, which contains
multiple fields. Currently the function get_cte() which reads one
entry from the device table returns a success/failure boolean and
passes back the raw 64-bit integer CTE value via a pointer argument.
We then extract fields from the CTE as we need them.

Create a real C struct with the same fields as the CTE, and
populate it in get_cte(), so that that function and update_cte()
are the only ones which need to care about the in-guest-memory
format of the CTE.

This brings get_cte()'s API into line with get_dte().

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220201193207.2771604-5-peter.maydell@linaro.org
---
 hw/intc/arm_gicv3_its.c | 96 ++++++++++++++++++++++-------------------
 1 file changed, 52 insertions(+), 44 deletions(-)

diff --git a/hw/intc/arm_gicv3_its.c b/hw/intc/arm_gicv3_its.c
index 1856210e79a..482a71ba73c 100644
--- a/hw/intc/arm_gicv3_its.c
+++ b/hw/intc/arm_gicv3_its.c
@@ -52,6 +52,11 @@ typedef struct DTEntry {
     uint64_t ittaddr;
 } DTEntry;
 
+typedef struct CTEntry {
+    bool valid;
+    uint32_t rdbase;
+} CTEntry;
+
 /*
  * The ITS spec permits a range of CONSTRAINED UNPREDICTABLE options
  * if a command parameter is not correct. These include both "stall
@@ -135,18 +140,32 @@ static uint64_t table_entry_addr(GICv3ITSState *s, TableDesc *td,
     return (l2 & ((1ULL << 51) - 1)) + (idx % num_l2_entries) * td->entry_sz;
 }
 
-static bool get_cte(GICv3ITSState *s, uint16_t icid, uint64_t *cte,
-                    MemTxResult *res)
+/*
+ * Read the Collection Table entry at index @icid. On success (including
+ * successfully determining that there is no valid CTE for this index),
+ * we return MEMTX_OK and populate the CTEntry struct @cte accordingly.
+ * If there is an error reading memory then we return the error code.
+ */
+static MemTxResult get_cte(GICv3ITSState *s, uint16_t icid, CTEntry *cte)
 {
     AddressSpace *as = &s->gicv3->dma_as;
-    uint64_t entry_addr = table_entry_addr(s, &s->ct, icid, res);
+    MemTxResult res = MEMTX_OK;
+    uint64_t entry_addr = table_entry_addr(s, &s->ct, icid, &res);
+    uint64_t cteval;
 
     if (entry_addr == -1) {
-        return false; /* not valid */
+        /* No L2 table entry, i.e. no valid CTE, or a memory error */
+        cte->valid = false;
+        return res;
     }
 
-    *cte = address_space_ldq_le(as, entry_addr, MEMTXATTRS_UNSPECIFIED, res);
-    return FIELD_EX64(*cte, CTE, VALID);
+    cteval = address_space_ldq_le(as, entry_addr, MEMTXATTRS_UNSPECIFIED, &res);
+    if (res != MEMTX_OK) {
+        return res;
+    }
+    cte->valid = FIELD_EX64(cteval, CTE, VALID);
+    cte->rdbase = FIELD_EX64(cteval, CTE, RDBASE);
+    return MEMTX_OK;
 }
 
 static bool update_ite(GICv3ITSState *s, uint32_t eventid, const DTEntry *dte,
@@ -248,10 +267,8 @@ static ItsCmdResult do_process_its_cmd(GICv3ITSState *s, uint32_t devid,
     uint16_t icid = 0;
     uint32_t pIntid = 0;
     bool ite_valid = false;
-    uint64_t cte = 0;
-    bool cte_valid = false;
-    uint64_t rdbase;
     DTEntry dte;
+    CTEntry cte;
 
     if (devid >= s->dt.num_entries) {
         qemu_log_mask(LOG_GUEST_ERROR,
@@ -298,15 +315,13 @@ static ItsCmdResult do_process_its_cmd(GICv3ITSState *s, uint32_t devid,
         return CMD_CONTINUE;
     }
 
-    cte_valid = get_cte(s, icid, &cte, &res);
-    if (res != MEMTX_OK) {
+    if (get_cte(s, icid, &cte) != MEMTX_OK) {
         return CMD_STALL;
     }
-    if (!cte_valid) {
+    if (!cte.valid) {
         qemu_log_mask(LOG_GUEST_ERROR,
-                      "%s: invalid command attributes: "
-                      "invalid cte: %"PRIx64"\n",
-                      __func__, cte);
+                      "%s: invalid command attributes: invalid CTE\n",
+                      __func__);
         return CMD_CONTINUE;
     }
 
@@ -314,16 +329,14 @@ static ItsCmdResult do_process_its_cmd(GICv3ITSState *s, uint32_t devid,
      * Current implementation only supports rdbase == procnum
      * Hence rdbase physical address is ignored
      */
-    rdbase = FIELD_EX64(cte, CTE, RDBASE);
-
-    if (rdbase >= s->gicv3->num_cpu) {
+    if (cte.rdbase >= s->gicv3->num_cpu) {
         return CMD_CONTINUE;
     }
 
     if ((cmd == CLEAR) || (cmd == DISCARD)) {
-        gicv3_redist_process_lpi(&s->gicv3->cpu[rdbase], pIntid, 0);
+        gicv3_redist_process_lpi(&s->gicv3->cpu[cte.rdbase], pIntid, 0);
     } else {
-        gicv3_redist_process_lpi(&s->gicv3->cpu[rdbase], pIntid, 1);
+        gicv3_redist_process_lpi(&s->gicv3->cpu[cte.rdbase], pIntid, 1);
     }
 
     if (cmd == DISCARD) {
@@ -564,12 +577,11 @@ static ItsCmdResult process_movi(GICv3ITSState *s, const uint64_t *cmdpkt)
     MemTxResult res = MEMTX_OK;
     uint32_t devid, eventid, intid;
     uint16_t old_icid, new_icid;
-    uint64_t old_cte, new_cte;
-    uint64_t old_rdbase, new_rdbase;
-    bool ite_valid, cte_valid;
+    bool ite_valid;
     uint64_t num_eventids;
     IteEntry ite = {};
     DTEntry dte;
+    CTEntry old_cte, new_cte;
 
     devid = FIELD_EX64(cmdpkt[0], MOVI_0, DEVICEID);
     eventid = FIELD_EX64(cmdpkt[1], MOVI_1, EVENTID);
@@ -627,50 +639,46 @@ static ItsCmdResult process_movi(GICv3ITSState *s, const uint64_t *cmdpkt)
         return CMD_CONTINUE;
     }
 
-    cte_valid = get_cte(s, old_icid, &old_cte, &res);
-    if (res != MEMTX_OK) {
+    if (get_cte(s, old_icid, &old_cte) != MEMTX_OK) {
         return CMD_STALL;
     }
-    if (!cte_valid) {
+    if (!old_cte.valid) {
         qemu_log_mask(LOG_GUEST_ERROR,
                       "%s: invalid command attributes: "
-                      "invalid cte: %"PRIx64"\n",
-                      __func__, old_cte);
+                      "invalid CTE for old ICID 0x%x\n",
+                      __func__, old_icid);
         return CMD_CONTINUE;
     }
 
-    cte_valid = get_cte(s, new_icid, &new_cte, &res);
-    if (res != MEMTX_OK) {
+    if (get_cte(s, new_icid, &new_cte) != MEMTX_OK) {
         return CMD_STALL;
     }
-    if (!cte_valid) {
+    if (!new_cte.valid) {
         qemu_log_mask(LOG_GUEST_ERROR,
                       "%s: invalid command attributes: "
-                      "invalid cte: %"PRIx64"\n",
-                      __func__, new_cte);
+                      "invalid CTE for new ICID 0x%x\n",
+                      __func__, new_icid);
         return CMD_CONTINUE;
     }
 
-    old_rdbase = FIELD_EX64(old_cte, CTE, RDBASE);
-    if (old_rdbase >= s->gicv3->num_cpu) {
+    if (old_cte.rdbase >= s->gicv3->num_cpu) {
         qemu_log_mask(LOG_GUEST_ERROR,
-                      "%s: CTE has invalid rdbase 0x%"PRIx64"\n",
-                      __func__, old_rdbase);
+                      "%s: CTE has invalid rdbase 0x%x\n",
+                      __func__, old_cte.rdbase);
         return CMD_CONTINUE;
     }
 
-    new_rdbase = FIELD_EX64(new_cte, CTE, RDBASE);
-    if (new_rdbase >= s->gicv3->num_cpu) {
+    if (new_cte.rdbase >= s->gicv3->num_cpu) {
         qemu_log_mask(LOG_GUEST_ERROR,
-                      "%s: CTE has invalid rdbase 0x%"PRIx64"\n",
-                      __func__, new_rdbase);
+                      "%s: CTE has invalid rdbase 0x%x\n",
+                      __func__, new_cte.rdbase);
         return CMD_CONTINUE;
     }
 
-    if (old_rdbase != new_rdbase) {
+    if (old_cte.rdbase != new_cte.rdbase) {
         /* Move the LPI from the old redistributor to the new one */
-        gicv3_redist_mov_lpi(&s->gicv3->cpu[old_rdbase],
-                             &s->gicv3->cpu[new_rdbase],
+        gicv3_redist_mov_lpi(&s->gicv3->cpu[old_cte.rdbase],
+                             &s->gicv3->cpu[new_cte.rdbase],
                              intid);
     }
 
-- 
2.25.1

[PULL 30/39] hw/intc/arm_gicv3_its: Pass CTEntry to update_cte()

[Peter Maydell]

Make update_cte() take a CTEntry struct rather than all the fields
of the new CTE as separate arguments.

This brings it into line with the update_dte() API.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220201193207.2771604-6-peter.maydell@linaro.org
---
 hw/intc/arm_gicv3_its.c | 32 +++++++++++++++++---------------
 1 file changed, 17 insertions(+), 15 deletions(-)

diff --git a/hw/intc/arm_gicv3_its.c b/hw/intc/arm_gicv3_its.c
index 482a71ba73c..b94775fd379 100644
--- a/hw/intc/arm_gicv3_its.c
+++ b/hw/intc/arm_gicv3_its.c
@@ -418,22 +418,25 @@ static ItsCmdResult process_mapti(GICv3ITSState *s, const uint64_t *cmdpkt,
     return update_ite(s, eventid, &dte, ite) ? CMD_CONTINUE : CMD_STALL;
 }
 
-static bool update_cte(GICv3ITSState *s, uint16_t icid, bool valid,
-                       uint64_t rdbase)
+/*
+ * Update the Collection Table entry for @icid to @cte. Returns true
+ * on success, false if there was a memory access error.
+ */
+static bool update_cte(GICv3ITSState *s, uint16_t icid, const CTEntry *cte)
 {
     AddressSpace *as = &s->gicv3->dma_as;
     uint64_t entry_addr;
-    uint64_t cte = 0;
+    uint64_t cteval = 0;
     MemTxResult res = MEMTX_OK;
 
     if (!s->ct.valid) {
         return true;
     }
 
-    if (valid) {
+    if (cte->valid) {
         /* add mapping entry to collection table */
-        cte = FIELD_DP64(cte, CTE, VALID, 1);
-        cte = FIELD_DP64(cte, CTE, RDBASE, rdbase);
+        cteval = FIELD_DP64(cteval, CTE, VALID, 1);
+        cteval = FIELD_DP64(cteval, CTE, RDBASE, cte->rdbase);
     }
 
     entry_addr = table_entry_addr(s, &s->ct, icid, &res);
@@ -446,27 +449,26 @@ static bool update_cte(GICv3ITSState *s, uint16_t icid, bool valid,
         return true;
     }
 
-    address_space_stq_le(as, entry_addr, cte, MEMTXATTRS_UNSPECIFIED, &res);
+    address_space_stq_le(as, entry_addr, cteval, MEMTXATTRS_UNSPECIFIED, &res);
     return res == MEMTX_OK;
 }
 
 static ItsCmdResult process_mapc(GICv3ITSState *s, const uint64_t *cmdpkt)
 {
     uint16_t icid;
-    uint64_t rdbase;
-    bool valid;
+    CTEntry cte;
 
     icid = cmdpkt[2] & ICID_MASK;
 
-    rdbase = (cmdpkt[2] & R_MAPC_RDBASE_MASK) >> R_MAPC_RDBASE_SHIFT;
-    rdbase &= RDBASE_PROCNUM_MASK;
+    cte.rdbase = (cmdpkt[2] & R_MAPC_RDBASE_MASK) >> R_MAPC_RDBASE_SHIFT;
+    cte.rdbase &= RDBASE_PROCNUM_MASK;
 
-    valid = cmdpkt[2] & CMD_FIELD_VALID_MASK;
+    cte.valid = cmdpkt[2] & CMD_FIELD_VALID_MASK;
 
-    if ((icid >= s->ct.num_entries) || (rdbase >= s->gicv3->num_cpu)) {
+    if ((icid >= s->ct.num_entries) || (cte.rdbase >= s->gicv3->num_cpu)) {
         qemu_log_mask(LOG_GUEST_ERROR,
                       "ITS MAPC: invalid collection table attributes "
-                      "icid %d rdbase %" PRIu64 "\n",  icid, rdbase);
+                      "icid %d rdbase %u\n",  icid, cte.rdbase);
         /*
          * in this implementation, in case of error
          * we ignore this command and move onto the next
@@ -475,7 +477,7 @@ static ItsCmdResult process_mapc(GICv3ITSState *s, const uint64_t *cmdpkt)
         return CMD_CONTINUE;
     }
 
-    return update_cte(s, icid, valid, rdbase) ? CMD_CONTINUE : CMD_STALL;
+    return update_cte(s, icid, &cte) ? CMD_CONTINUE : CMD_STALL;
 }
 
 /*
-- 
2.25.1

[PULL 31/39] hw/intc/arm_gicv3_its: Fix address calculation in get_ite() and update_ite()

[Peter Maydell]

In get_ite() and update_ite() we work with a 12-byte in-guest-memory
table entry, which we intend to handle as an 8-byte value followed by
a 4-byte value.  Unfortunately the calculation of the address of the
4-byte value is wrong, because we write it as:

 table_base_address + (index * entrysize) + 4
(obfuscated by the way the expression has been written)

when it should be + 8.  This bug meant that we overwrote the top
bytes of the 8-byte value with the 4-byte value.  There are no
guest-visible effects because the top half of the 8-byte value
contains only the doorbell interrupt field, which is used only in
GICv4, and the two bugs in the "write ITE" and "read ITE" codepaths
cancel each other out.

We can't simply change the calculation, because this would break
migration of a (TCG) guest from the old version of QEMU which had
in-guest-memory interrupt tables written using the buggy version of
update_ite().  We must also at the same time change the layout of the
fields within the ITE_L and ITE_H values so that the in-memory
locations of the fields we care about (VALID, INTTYPE, INTID and
ICID) stay the same.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220201193207.2771604-7-peter.maydell@linaro.org
---
 hw/intc/gicv3_internal.h | 19 ++++++++++---------
 hw/intc/arm_gicv3_its.c  | 28 +++++++++++-----------------
 2 files changed, 21 insertions(+), 26 deletions(-)

diff --git a/hw/intc/gicv3_internal.h b/hw/intc/gicv3_internal.h
index 60c8617e4e4..2bf1baef047 100644
--- a/hw/intc/gicv3_internal.h
+++ b/hw/intc/gicv3_internal.h
@@ -370,22 +370,23 @@ FIELD(MOVI_2, ICID, 0, 16)
  * 12 bytes Interrupt translation Table Entry size
  * as per Table 5.3 in GICv3 spec
  * ITE Lower 8 Bytes
- *   Bits:    | 49 ... 26 | 25 ... 2 |   1     |   0    |
- *   Values:  |  Doorbell |  IntNum  | IntType |  Valid |
+ *   Bits:    | 63 ... 48 | 47 ... 32 | 31 ... 26 | 25 ... 2 |   1     |  0    |
+ *   Values:  | vPEID     | ICID      | unused    |  IntNum  | IntType | Valid |
  * ITE Higher 4 Bytes
- *   Bits:    | 31 ... 16 | 15 ...0 |
- *   Values:  |  vPEID    |  ICID   |
- * (When Doorbell is unused, as it always is in GICv3, it is 1023)
+ *   Bits:    | 31 ... 25 | 24 ... 0 |
+ *   Values:  | unused    | Doorbell |
+ * (When Doorbell is unused, as it always is for INTYPE_PHYSICAL,
+ * the value of that field in memory cannot be relied upon -- older
+ * versions of QEMU did not correctly write to that memory.)
  */
 #define ITS_ITT_ENTRY_SIZE            0xC
 
 FIELD(ITE_L, VALID, 0, 1)
 FIELD(ITE_L, INTTYPE, 1, 1)
 FIELD(ITE_L, INTID, 2, 24)
-FIELD(ITE_L, DOORBELL, 26, 24)
-
-FIELD(ITE_H, ICID, 0, 16)
-FIELD(ITE_H, VPEID, 16, 16)
+FIELD(ITE_L, ICID, 32, 16)
+FIELD(ITE_L, VPEID, 48, 16)
+FIELD(ITE_H, DOORBELL, 0, 24)
 
 /* Possible values for ITE_L INTTYPE */
 #define ITE_INTTYPE_VIRTUAL 0
diff --git a/hw/intc/arm_gicv3_its.c b/hw/intc/arm_gicv3_its.c
index b94775fd379..48eaf20a6c9 100644
--- a/hw/intc/arm_gicv3_its.c
+++ b/hw/intc/arm_gicv3_its.c
@@ -173,14 +173,12 @@ static bool update_ite(GICv3ITSState *s, uint32_t eventid, const DTEntry *dte,
 {
     AddressSpace *as = &s->gicv3->dma_as;
     MemTxResult res = MEMTX_OK;
+    hwaddr iteaddr = dte->ittaddr + eventid * ITS_ITT_ENTRY_SIZE;
 
-    address_space_stq_le(as, dte->ittaddr + (eventid * (sizeof(uint64_t) +
-                         sizeof(uint32_t))), ite.itel, MEMTXATTRS_UNSPECIFIED,
-                         &res);
+    address_space_stq_le(as, iteaddr, ite.itel, MEMTXATTRS_UNSPECIFIED, &res);
 
     if (res == MEMTX_OK) {
-        address_space_stl_le(as, dte->ittaddr + (eventid * (sizeof(uint64_t) +
-                             sizeof(uint32_t))) + sizeof(uint32_t), ite.iteh,
+        address_space_stl_le(as, iteaddr + 8, ite.iteh,
                              MEMTXATTRS_UNSPECIFIED, &res);
     }
     if (res != MEMTX_OK) {
@@ -196,16 +194,12 @@ static bool get_ite(GICv3ITSState *s, uint32_t eventid, const DTEntry *dte,
     AddressSpace *as = &s->gicv3->dma_as;
     bool status = false;
     IteEntry ite = {};
+    hwaddr iteaddr = dte->ittaddr + eventid * ITS_ITT_ENTRY_SIZE;
 
-    ite.itel = address_space_ldq_le(as, dte->ittaddr +
-                                    (eventid * (sizeof(uint64_t) +
-                                    sizeof(uint32_t))), MEMTXATTRS_UNSPECIFIED,
-                                    res);
+    ite.itel = address_space_ldq_le(as, iteaddr, MEMTXATTRS_UNSPECIFIED, res);
 
     if (*res == MEMTX_OK) {
-        ite.iteh = address_space_ldl_le(as, dte->ittaddr +
-                                        (eventid * (sizeof(uint64_t) +
-                                        sizeof(uint32_t))) + sizeof(uint32_t),
+        ite.iteh = address_space_ldl_le(as, iteaddr + 8,
                                         MEMTXATTRS_UNSPECIFIED, res);
 
         if (*res == MEMTX_OK) {
@@ -213,7 +207,7 @@ static bool get_ite(GICv3ITSState *s, uint32_t eventid, const DTEntry *dte,
                 int inttype = FIELD_EX64(ite.itel, ITE_L, INTTYPE);
                 if (inttype == ITE_INTTYPE_PHYSICAL) {
                     *pIntid = FIELD_EX64(ite.itel, ITE_L, INTID);
-                    *icid = FIELD_EX32(ite.iteh, ITE_H, ICID);
+                    *icid = FIELD_EX64(ite.itel, ITE_L, ICID);
                     status = true;
                 }
             }
@@ -412,8 +406,8 @@ static ItsCmdResult process_mapti(GICv3ITSState *s, const uint64_t *cmdpkt,
     ite.itel = FIELD_DP64(ite.itel, ITE_L, VALID, true);
     ite.itel = FIELD_DP64(ite.itel, ITE_L, INTTYPE, ITE_INTTYPE_PHYSICAL);
     ite.itel = FIELD_DP64(ite.itel, ITE_L, INTID, pIntid);
-    ite.itel = FIELD_DP64(ite.itel, ITE_L, DOORBELL, INTID_SPURIOUS);
-    ite.iteh = FIELD_DP32(ite.iteh, ITE_H, ICID, icid);
+    ite.itel = FIELD_DP64(ite.itel, ITE_L, ICID, icid);
+    ite.iteh = FIELD_DP32(ite.iteh, ITE_H, DOORBELL, INTID_SPURIOUS);
 
     return update_ite(s, eventid, &dte, ite) ? CMD_CONTINUE : CMD_STALL;
 }
@@ -688,8 +682,8 @@ static ItsCmdResult process_movi(GICv3ITSState *s, const uint64_t *cmdpkt)
     ite.itel = FIELD_DP64(ite.itel, ITE_L, VALID, 1);
     ite.itel = FIELD_DP64(ite.itel, ITE_L, INTTYPE, ITE_INTTYPE_PHYSICAL);
     ite.itel = FIELD_DP64(ite.itel, ITE_L, INTID, intid);
-    ite.itel = FIELD_DP64(ite.itel, ITE_L, DOORBELL, INTID_SPURIOUS);
-    ite.iteh = FIELD_DP32(ite.iteh, ITE_H, ICID, new_icid);
+    ite.itel = FIELD_DP64(ite.itel, ITE_L, ICID, new_icid);
+    ite.iteh = FIELD_DP32(ite.iteh, ITE_H, DOORBELL, INTID_SPURIOUS);
     return update_ite(s, eventid, &dte, ite) ? CMD_CONTINUE : CMD_STALL;
 }
 
-- 
2.25.1

[PULL 32/39] hw/intc/arm_gicv3_its: Avoid nested ifs in get_ite()

[Peter Maydell]

The get_ite() code has some awkward nested if statements; clean
them up by returning early if the memory accesses fail.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220201193207.2771604-8-peter.maydell@linaro.org
---
 hw/intc/arm_gicv3_its.c | 26 ++++++++++++++------------
 1 file changed, 14 insertions(+), 12 deletions(-)

diff --git a/hw/intc/arm_gicv3_its.c b/hw/intc/arm_gicv3_its.c
index 48eaf20a6c9..6975a349f62 100644
--- a/hw/intc/arm_gicv3_its.c
+++ b/hw/intc/arm_gicv3_its.c
@@ -197,20 +197,22 @@ static bool get_ite(GICv3ITSState *s, uint32_t eventid, const DTEntry *dte,
     hwaddr iteaddr = dte->ittaddr + eventid * ITS_ITT_ENTRY_SIZE;
 
     ite.itel = address_space_ldq_le(as, iteaddr, MEMTXATTRS_UNSPECIFIED, res);
+    if (*res != MEMTX_OK) {
+        return false;
+    }
 
-    if (*res == MEMTX_OK) {
-        ite.iteh = address_space_ldl_le(as, iteaddr + 8,
-                                        MEMTXATTRS_UNSPECIFIED, res);
+    ite.iteh = address_space_ldl_le(as, iteaddr + 8,
+                                    MEMTXATTRS_UNSPECIFIED, res);
+    if (*res != MEMTX_OK) {
+        return false;
+    }
 
-        if (*res == MEMTX_OK) {
-            if (FIELD_EX64(ite.itel, ITE_L, VALID)) {
-                int inttype = FIELD_EX64(ite.itel, ITE_L, INTTYPE);
-                if (inttype == ITE_INTTYPE_PHYSICAL) {
-                    *pIntid = FIELD_EX64(ite.itel, ITE_L, INTID);
-                    *icid = FIELD_EX64(ite.itel, ITE_L, ICID);
-                    status = true;
-                }
-            }
+    if (FIELD_EX64(ite.itel, ITE_L, VALID)) {
+        int inttype = FIELD_EX64(ite.itel, ITE_L, INTTYPE);
+        if (inttype == ITE_INTTYPE_PHYSICAL) {
+            *pIntid = FIELD_EX64(ite.itel, ITE_L, INTID);
+            *icid = FIELD_EX64(ite.itel, ITE_L, ICID);
+            status = true;
         }
     }
     return status;
-- 
2.25.1

[PULL 33/39] hw/intc/arm_gicv3_its: Pass ITE values back from get_ite() via a struct

[Peter Maydell]

In get_ite() we currently return the caller some of the fields of an
Interrupt Table Entry via a set of pointer arguments, and validate
some of them internally (interrupt type and valid bit) to return a
simple true/false 'valid' indication. Define a new ITEntry struct
which has all the fields that the in-memory ITE has, and bring the
get_ite() function in to line with get_dte() and get_cte().

This paves the way for handling virtual interrupts, which will want
a different subset of the fields in the ITE. Handling them under
the old "lots of pointer arguments" scheme would have meant a
confusingly large set of arguments for this function.

The new struct ITEntry is obviously confusably similar to the
existing IteEntry struct, whose fields are the raw 12 bytes
of the in-memory ITE. In the next commit we will make update_ite()
use ITEntry instead of IteEntry, which will allow us to delete
the IteEntry struct and remove the confusion.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220201193207.2771604-9-peter.maydell@linaro.org
---
 hw/intc/arm_gicv3_its.c | 102 ++++++++++++++++++++++------------------
 1 file changed, 55 insertions(+), 47 deletions(-)

diff --git a/hw/intc/arm_gicv3_its.c b/hw/intc/arm_gicv3_its.c
index 6975a349f62..bd741085022 100644
--- a/hw/intc/arm_gicv3_its.c
+++ b/hw/intc/arm_gicv3_its.c
@@ -57,6 +57,16 @@ typedef struct CTEntry {
     uint32_t rdbase;
 } CTEntry;
 
+typedef struct ITEntry {
+    bool valid;
+    int inttype;
+    uint32_t intid;
+    uint32_t doorbell;
+    uint32_t icid;
+    uint32_t vpeid;
+} ITEntry;
+
+
 /*
  * The ITS spec permits a range of CONSTRAINED UNPREDICTABLE options
  * if a command parameter is not correct. These include both "stall
@@ -188,34 +198,38 @@ static bool update_ite(GICv3ITSState *s, uint32_t eventid, const DTEntry *dte,
     }
 }
 
-static bool get_ite(GICv3ITSState *s, uint32_t eventid, const DTEntry *dte,
-                    uint16_t *icid, uint32_t *pIntid, MemTxResult *res)
+/*
+ * Read the Interrupt Table entry at index @eventid from the table specified
+ * by the DTE @dte. On success, we return MEMTX_OK and populate the ITEntry
+ * struct @ite accordingly. If there is an error reading memory then we return
+ * the error code.
+ */
+static MemTxResult get_ite(GICv3ITSState *s, uint32_t eventid,
+                           const DTEntry *dte, ITEntry *ite)
 {
     AddressSpace *as = &s->gicv3->dma_as;
-    bool status = false;
-    IteEntry ite = {};
+    MemTxResult res = MEMTX_OK;
+    uint64_t itel;
+    uint32_t iteh;
     hwaddr iteaddr = dte->ittaddr + eventid * ITS_ITT_ENTRY_SIZE;
 
-    ite.itel = address_space_ldq_le(as, iteaddr, MEMTXATTRS_UNSPECIFIED, res);
-    if (*res != MEMTX_OK) {
-        return false;
+    itel = address_space_ldq_le(as, iteaddr, MEMTXATTRS_UNSPECIFIED, &res);
+    if (res != MEMTX_OK) {
+        return res;
     }
 
-    ite.iteh = address_space_ldl_le(as, iteaddr + 8,
-                                    MEMTXATTRS_UNSPECIFIED, res);
-    if (*res != MEMTX_OK) {
-        return false;
+    iteh = address_space_ldl_le(as, iteaddr + 8, MEMTXATTRS_UNSPECIFIED, &res);
+    if (res != MEMTX_OK) {
+        return res;
     }
 
-    if (FIELD_EX64(ite.itel, ITE_L, VALID)) {
-        int inttype = FIELD_EX64(ite.itel, ITE_L, INTTYPE);
-        if (inttype == ITE_INTTYPE_PHYSICAL) {
-            *pIntid = FIELD_EX64(ite.itel, ITE_L, INTID);
-            *icid = FIELD_EX64(ite.itel, ITE_L, ICID);
-            status = true;
-        }
-    }
-    return status;
+    ite->valid = FIELD_EX64(itel, ITE_L, VALID);
+    ite->inttype = FIELD_EX64(itel, ITE_L, INTTYPE);
+    ite->intid = FIELD_EX64(itel, ITE_L, INTID);
+    ite->icid = FIELD_EX64(itel, ITE_L, ICID);
+    ite->vpeid = FIELD_EX64(itel, ITE_L, VPEID);
+    ite->doorbell = FIELD_EX64(iteh, ITE_H, DOORBELL);
+    return MEMTX_OK;
 }
 
 /*
@@ -258,13 +272,10 @@ static MemTxResult get_dte(GICv3ITSState *s, uint32_t devid, DTEntry *dte)
 static ItsCmdResult do_process_its_cmd(GICv3ITSState *s, uint32_t devid,
                                        uint32_t eventid, ItsCmdType cmd)
 {
-    MemTxResult res = MEMTX_OK;
     uint64_t num_eventids;
-    uint16_t icid = 0;
-    uint32_t pIntid = 0;
-    bool ite_valid = false;
     DTEntry dte;
     CTEntry cte;
+    ITEntry ite;
 
     if (devid >= s->dt.num_entries) {
         qemu_log_mask(LOG_GUEST_ERROR,
@@ -292,26 +303,25 @@ static ItsCmdResult do_process_its_cmd(GICv3ITSState *s, uint32_t devid,
         return CMD_CONTINUE;
     }
 
-    ite_valid = get_ite(s, eventid, &dte, &icid, &pIntid, &res);
-    if (res != MEMTX_OK) {
+    if (get_ite(s, eventid, &dte, &ite) != MEMTX_OK) {
         return CMD_STALL;
     }
 
-    if (!ite_valid) {
+    if (!ite.valid || ite.inttype != ITE_INTTYPE_PHYSICAL) {
         qemu_log_mask(LOG_GUEST_ERROR,
                       "%s: invalid command attributes: invalid ITE\n",
                       __func__);
         return CMD_CONTINUE;
     }
 
-    if (icid >= s->ct.num_entries) {
+    if (ite.icid >= s->ct.num_entries) {
         qemu_log_mask(LOG_GUEST_ERROR,
                       "%s: invalid ICID 0x%x in ITE (table corrupted?)\n",
-                      __func__, icid);
+                      __func__, ite.icid);
         return CMD_CONTINUE;
     }
 
-    if (get_cte(s, icid, &cte) != MEMTX_OK) {
+    if (get_cte(s, ite.icid, &cte) != MEMTX_OK) {
         return CMD_STALL;
     }
     if (!cte.valid) {
@@ -330,15 +340,15 @@ static ItsCmdResult do_process_its_cmd(GICv3ITSState *s, uint32_t devid,
     }
 
     if ((cmd == CLEAR) || (cmd == DISCARD)) {
-        gicv3_redist_process_lpi(&s->gicv3->cpu[cte.rdbase], pIntid, 0);
+        gicv3_redist_process_lpi(&s->gicv3->cpu[cte.rdbase], ite.intid, 0);
     } else {
-        gicv3_redist_process_lpi(&s->gicv3->cpu[cte.rdbase], pIntid, 1);
+        gicv3_redist_process_lpi(&s->gicv3->cpu[cte.rdbase], ite.intid, 1);
     }
 
     if (cmd == DISCARD) {
-        IteEntry ite = {};
+        IteEntry itee = {};
         /* remove mapping from interrupt translation table */
-        return update_ite(s, eventid, &dte, ite) ? CMD_CONTINUE : CMD_STALL;
+        return update_ite(s, eventid, &dte, itee) ? CMD_CONTINUE : CMD_STALL;
     }
     return CMD_CONTINUE;
 }
@@ -572,14 +582,13 @@ static ItsCmdResult process_movall(GICv3ITSState *s, const uint64_t *cmdpkt)
 
 static ItsCmdResult process_movi(GICv3ITSState *s, const uint64_t *cmdpkt)
 {
-    MemTxResult res = MEMTX_OK;
-    uint32_t devid, eventid, intid;
-    uint16_t old_icid, new_icid;
-    bool ite_valid;
+    uint32_t devid, eventid;
+    uint16_t new_icid;
     uint64_t num_eventids;
     IteEntry ite = {};
     DTEntry dte;
     CTEntry old_cte, new_cte;
+    ITEntry old_ite;
 
     devid = FIELD_EX64(cmdpkt[0], MOVI_0, DEVICEID);
     eventid = FIELD_EX64(cmdpkt[1], MOVI_1, EVENTID);
@@ -611,22 +620,21 @@ static ItsCmdResult process_movi(GICv3ITSState *s, const uint64_t *cmdpkt)
         return CMD_CONTINUE;
     }
 
-    ite_valid = get_ite(s, eventid, &dte, &old_icid, &intid, &res);
-    if (res != MEMTX_OK) {
+    if (get_ite(s, eventid, &dte, &old_ite) != MEMTX_OK) {
         return CMD_STALL;
     }
 
-    if (!ite_valid) {
+    if (!old_ite.valid || old_ite.inttype != ITE_INTTYPE_PHYSICAL) {
         qemu_log_mask(LOG_GUEST_ERROR,
                       "%s: invalid command attributes: invalid ITE\n",
                       __func__);
         return CMD_CONTINUE;
     }
 
-    if (old_icid >= s->ct.num_entries) {
+    if (old_ite.icid >= s->ct.num_entries) {
         qemu_log_mask(LOG_GUEST_ERROR,
                       "%s: invalid ICID 0x%x in ITE (table corrupted?)\n",
-                      __func__, old_icid);
+                      __func__, old_ite.icid);
         return CMD_CONTINUE;
     }
 
@@ -637,14 +645,14 @@ static ItsCmdResult process_movi(GICv3ITSState *s, const uint64_t *cmdpkt)
         return CMD_CONTINUE;
     }
 
-    if (get_cte(s, old_icid, &old_cte) != MEMTX_OK) {
+    if (get_cte(s, old_ite.icid, &old_cte) != MEMTX_OK) {
         return CMD_STALL;
     }
     if (!old_cte.valid) {
         qemu_log_mask(LOG_GUEST_ERROR,
                       "%s: invalid command attributes: "
                       "invalid CTE for old ICID 0x%x\n",
-                      __func__, old_icid);
+                      __func__, old_ite.icid);
         return CMD_CONTINUE;
     }
 
@@ -677,13 +685,13 @@ static ItsCmdResult process_movi(GICv3ITSState *s, const uint64_t *cmdpkt)
         /* Move the LPI from the old redistributor to the new one */
         gicv3_redist_mov_lpi(&s->gicv3->cpu[old_cte.rdbase],
                              &s->gicv3->cpu[new_cte.rdbase],
-                             intid);
+                             old_ite.intid);
     }
 
     /* Update the ICID field in the interrupt translation table entry */
     ite.itel = FIELD_DP64(ite.itel, ITE_L, VALID, 1);
     ite.itel = FIELD_DP64(ite.itel, ITE_L, INTTYPE, ITE_INTTYPE_PHYSICAL);
-    ite.itel = FIELD_DP64(ite.itel, ITE_L, INTID, intid);
+    ite.itel = FIELD_DP64(ite.itel, ITE_L, INTID, old_ite.intid);
     ite.itel = FIELD_DP64(ite.itel, ITE_L, ICID, new_icid);
     ite.iteh = FIELD_DP32(ite.iteh, ITE_H, DOORBELL, INTID_SPURIOUS);
     return update_ite(s, eventid, &dte, ite) ? CMD_CONTINUE : CMD_STALL;
-- 
2.25.1

[PULL 34/39] hw/intc/arm_gicv3_its: Make update_ite() use ITEntry

[Peter Maydell]

Make the update_ite() struct use the new ITEntry struct, so that
callers don't need to assemble the in-memory ITE data themselves, and
only get_ite() and update_ite() need to care about that in-memory
layout.  We can then drop the no-longer-used IteEntry struct
definition.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220201193207.2771604-10-peter.maydell@linaro.org
---
 hw/intc/arm_gicv3_its.c | 62 +++++++++++++++++++++--------------------
 1 file changed, 32 insertions(+), 30 deletions(-)

diff --git a/hw/intc/arm_gicv3_its.c b/hw/intc/arm_gicv3_its.c
index bd741085022..e3b63efddcc 100644
--- a/hw/intc/arm_gicv3_its.c
+++ b/hw/intc/arm_gicv3_its.c
@@ -41,11 +41,6 @@ typedef enum ItsCmdType {
     INTERRUPT = 3,
 } ItsCmdType;
 
-typedef struct {
-    uint32_t iteh;
-    uint64_t itel;
-} IteEntry;
-
 typedef struct DTEntry {
     bool valid;
     unsigned size;
@@ -178,24 +173,35 @@ static MemTxResult get_cte(GICv3ITSState *s, uint16_t icid, CTEntry *cte)
     return MEMTX_OK;
 }
 
+/*
+ * Update the Interrupt Table entry at index @evinted in the table specified
+ * by the dte @dte. Returns true on success, false if there was a memory
+ * access error.
+ */
 static bool update_ite(GICv3ITSState *s, uint32_t eventid, const DTEntry *dte,
-                       IteEntry ite)
+                       const ITEntry *ite)
 {
     AddressSpace *as = &s->gicv3->dma_as;
     MemTxResult res = MEMTX_OK;
     hwaddr iteaddr = dte->ittaddr + eventid * ITS_ITT_ENTRY_SIZE;
+    uint64_t itel = 0;
+    uint32_t iteh = 0;
 
-    address_space_stq_le(as, iteaddr, ite.itel, MEMTXATTRS_UNSPECIFIED, &res);
-
-    if (res == MEMTX_OK) {
-        address_space_stl_le(as, iteaddr + 8, ite.iteh,
-                             MEMTXATTRS_UNSPECIFIED, &res);
+    if (ite->valid) {
+        itel = FIELD_DP64(itel, ITE_L, VALID, 1);
+        itel = FIELD_DP64(itel, ITE_L, INTTYPE, ite->inttype);
+        itel = FIELD_DP64(itel, ITE_L, INTID, ite->intid);
+        itel = FIELD_DP64(itel, ITE_L, ICID, ite->icid);
+        itel = FIELD_DP64(itel, ITE_L, VPEID, ite->vpeid);
+        iteh = FIELD_DP32(iteh, ITE_H, DOORBELL, ite->doorbell);
     }
+
+    address_space_stq_le(as, iteaddr, itel, MEMTXATTRS_UNSPECIFIED, &res);
     if (res != MEMTX_OK) {
         return false;
-    } else {
-        return true;
     }
+    address_space_stl_le(as, iteaddr + 8, iteh, MEMTXATTRS_UNSPECIFIED, &res);
+    return res == MEMTX_OK;
 }
 
 /*
@@ -346,9 +352,10 @@ static ItsCmdResult do_process_its_cmd(GICv3ITSState *s, uint32_t devid,
     }
 
     if (cmd == DISCARD) {
-        IteEntry itee = {};
+        ITEntry ite = {};
         /* remove mapping from interrupt translation table */
-        return update_ite(s, eventid, &dte, itee) ? CMD_CONTINUE : CMD_STALL;
+        ite.valid = false;
+        return update_ite(s, eventid, &dte, &ite) ? CMD_CONTINUE : CMD_STALL;
     }
     return CMD_CONTINUE;
 }
@@ -370,8 +377,8 @@ static ItsCmdResult process_mapti(GICv3ITSState *s, const uint64_t *cmdpkt,
     uint64_t num_eventids;
     uint32_t num_intids;
     uint16_t icid = 0;
-    IteEntry ite = {};
     DTEntry dte;
+    ITEntry ite;
 
     devid = (cmdpkt[0] & DEVID_MASK) >> DEVID_SHIFT;
     eventid = cmdpkt[1] & EVENTID_MASK;
@@ -415,13 +422,13 @@ static ItsCmdResult process_mapti(GICv3ITSState *s, const uint64_t *cmdpkt,
     }
 
     /* add ite entry to interrupt translation table */
-    ite.itel = FIELD_DP64(ite.itel, ITE_L, VALID, true);
-    ite.itel = FIELD_DP64(ite.itel, ITE_L, INTTYPE, ITE_INTTYPE_PHYSICAL);
-    ite.itel = FIELD_DP64(ite.itel, ITE_L, INTID, pIntid);
-    ite.itel = FIELD_DP64(ite.itel, ITE_L, ICID, icid);
-    ite.iteh = FIELD_DP32(ite.iteh, ITE_H, DOORBELL, INTID_SPURIOUS);
-
-    return update_ite(s, eventid, &dte, ite) ? CMD_CONTINUE : CMD_STALL;
+    ite.valid = true;
+    ite.inttype = ITE_INTTYPE_PHYSICAL;
+    ite.intid = pIntid;
+    ite.icid = icid;
+    ite.doorbell = INTID_SPURIOUS;
+    ite.vpeid = 0;
+    return update_ite(s, eventid, &dte, &ite) ? CMD_CONTINUE : CMD_STALL;
 }
 
 /*
@@ -585,7 +592,6 @@ static ItsCmdResult process_movi(GICv3ITSState *s, const uint64_t *cmdpkt)
     uint32_t devid, eventid;
     uint16_t new_icid;
     uint64_t num_eventids;
-    IteEntry ite = {};
     DTEntry dte;
     CTEntry old_cte, new_cte;
     ITEntry old_ite;
@@ -689,12 +695,8 @@ static ItsCmdResult process_movi(GICv3ITSState *s, const uint64_t *cmdpkt)
     }
 
     /* Update the ICID field in the interrupt translation table entry */
-    ite.itel = FIELD_DP64(ite.itel, ITE_L, VALID, 1);
-    ite.itel = FIELD_DP64(ite.itel, ITE_L, INTTYPE, ITE_INTTYPE_PHYSICAL);
-    ite.itel = FIELD_DP64(ite.itel, ITE_L, INTID, old_ite.intid);
-    ite.itel = FIELD_DP64(ite.itel, ITE_L, ICID, new_icid);
-    ite.iteh = FIELD_DP32(ite.iteh, ITE_H, DOORBELL, INTID_SPURIOUS);
-    return update_ite(s, eventid, &dte, ite) ? CMD_CONTINUE : CMD_STALL;
+    old_ite.icid = new_icid;
+    return update_ite(s, eventid, &dte, &old_ite) ? CMD_CONTINUE : CMD_STALL;
 }
 
 /*
-- 
2.25.1

[PULL 35/39] hw/intc/arm_gicv3_its: Drop TableDesc and CmdQDesc valid fields

[Peter Maydell]

Currently we track in the TableDesc and CmdQDesc structs the state of
the GITS_BASER<n> and GITS_CBASER Valid bits.  However we aren't very
consistent abut checking the valid field: we test it in update_cte()
and update_dte(), but not anywhere else we look things up in tables.

The GIC specification says that it is UNPREDICTABLE if a guest fails
to set any of these Valid bits before enabling the ITS via
GITS_CTLR.Enabled.  So we can choose to handle Valid == 0 as
equivalent to a zero-length table.  This is in fact how we're already
catching this case in most of the table-access paths: when Valid is 0
we leave the num_entries fields in TableDesc or CmdQDesc set to zero,
and then the out-of-bounds check "index >= num_entries" that we have
to do anyway before doing any of these table lookups will always be
true, catching the no-valid-table case without any extra code.

So we can remove the checks on the valid field from update_cte()
and update_dte(): since these happen after the bounds check there
was never any case when the test could fail. That means the valid
fields would be entirely unused, so just remove them.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220201193207.2771604-11-peter.maydell@linaro.org
---
 include/hw/intc/arm_gicv3_its_common.h |  2 --
 hw/intc/arm_gicv3_its.c                | 31 ++++++++++++--------------
 2 files changed, 14 insertions(+), 19 deletions(-)

diff --git a/include/hw/intc/arm_gicv3_its_common.h b/include/hw/intc/arm_gicv3_its_common.h
index 3e2ad2dff60..0f130494dd3 100644
--- a/include/hw/intc/arm_gicv3_its_common.h
+++ b/include/hw/intc/arm_gicv3_its_common.h
@@ -42,7 +42,6 @@
 #define GITS_TRANSLATER  0x0040
 
 typedef struct {
-    bool valid;
     bool indirect;
     uint16_t entry_sz;
     uint32_t page_sz;
@@ -51,7 +50,6 @@ typedef struct {
 } TableDesc;
 
 typedef struct {
-    bool valid;
     uint32_t num_entries;
     uint64_t base_addr;
 } CmdQDesc;
diff --git a/hw/intc/arm_gicv3_its.c b/hw/intc/arm_gicv3_its.c
index e3b63efddcc..9735d609df2 100644
--- a/hw/intc/arm_gicv3_its.c
+++ b/hw/intc/arm_gicv3_its.c
@@ -442,10 +442,6 @@ static bool update_cte(GICv3ITSState *s, uint16_t icid, const CTEntry *cte)
     uint64_t cteval = 0;
     MemTxResult res = MEMTX_OK;
 
-    if (!s->ct.valid) {
-        return true;
-    }
-
     if (cte->valid) {
         /* add mapping entry to collection table */
         cteval = FIELD_DP64(cteval, CTE, VALID, 1);
@@ -504,15 +500,11 @@ static bool update_dte(GICv3ITSState *s, uint32_t devid, const DTEntry *dte)
     uint64_t dteval = 0;
     MemTxResult res = MEMTX_OK;
 
-    if (s->dt.valid) {
-        if (dte->valid) {
-            /* add mapping entry to device table */
-            dteval = FIELD_DP64(dteval, DTE, VALID, 1);
-            dteval = FIELD_DP64(dteval, DTE, SIZE, dte->size);
-            dteval = FIELD_DP64(dteval, DTE, ITTADDR, dte->ittaddr);
-        }
-    } else {
-        return true;
+    if (dte->valid) {
+        /* add mapping entry to device table */
+        dteval = FIELD_DP64(dteval, DTE, VALID, 1);
+        dteval = FIELD_DP64(dteval, DTE, SIZE, dte->size);
+        dteval = FIELD_DP64(dteval, DTE, ITTADDR, dte->ittaddr);
     }
 
     entry_addr = table_entry_addr(s, &s->dt, devid, &res);
@@ -901,7 +893,6 @@ static void extract_table_params(GICv3ITSState *s)
         }
 
         memset(td, 0, sizeof(*td));
-        td->valid = FIELD_EX64(value, GITS_BASER, VALID);
         /*
          * If GITS_BASER<n>.Valid is 0 for any <n> then we will not process
          * interrupts. (GITS_TYPER.HCC is 0 for this implementation, so we
@@ -909,8 +900,15 @@ static void extract_table_params(GICv3ITSState *s)
          * for the register corresponding to the Collection table but we
          * still have to process interrupts using non-memory-backed
          * Collection table entries.)
+         * The specification makes it UNPREDICTABLE to enable the ITS without
+         * marking each BASER<n> as valid. We choose to handle these as if
+         * the table was zero-sized, so commands using the table will fail
+         * and interrupts requested via GITS_TRANSLATER writes will be ignored.
+         * This happens automatically by leaving the num_entries field at
+         * zero, which will be caught by the bounds checks we have before
+         * every table lookup anyway.
          */
-        if (!td->valid) {
+        if (!FIELD_EX64(value, GITS_BASER, VALID)) {
             continue;
         }
         td->page_sz = page_sz;
@@ -936,9 +934,8 @@ static void extract_cmdq_params(GICv3ITSState *s)
     num_pages = FIELD_EX64(value, GITS_CBASER, SIZE) + 1;
 
     memset(&s->cq, 0 , sizeof(s->cq));
-    s->cq.valid = FIELD_EX64(value, GITS_CBASER, VALID);
 
-    if (s->cq.valid) {
+    if (FIELD_EX64(value, GITS_CBASER, VALID)) {
         s->cq.num_entries = (num_pages * GITS_PAGE_SIZE_4K) /
                              GITS_CMDQ_ENTRY_SIZE;
         s->cq.base_addr = FIELD_EX64(value, GITS_CBASER, PHYADDR);
-- 
2.25.1

[PULL 36/39] hw/intc/arm_gicv3_its: In MAPC with V=0, don't check rdbase field

[Peter Maydell]

In the MAPC command, if V=0 this is a request to delete a collection
table entry and the rdbase field of the command packet will not be
used.  In particular, the specification says that the "UNPREDICTABLE
if rdbase is not valid" only applies for V=1.

We were doing a check-and-log-guest-error on rdbase regardless of
whether the V bit was set, and also (harmlessly but confusingly)
storing the contents of the rdbase field into the updated collection
table entry.  Update the code so that if V=0 we don't check or use
the rdbase field value.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220201193207.2771604-12-peter.maydell@linaro.org
---
 hw/intc/arm_gicv3_its.c | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/hw/intc/arm_gicv3_its.c b/hw/intc/arm_gicv3_its.c
index 9735d609df2..069991f7f36 100644
--- a/hw/intc/arm_gicv3_its.c
+++ b/hw/intc/arm_gicv3_its.c
@@ -468,21 +468,21 @@ static ItsCmdResult process_mapc(GICv3ITSState *s, const uint64_t *cmdpkt)
     CTEntry cte;
 
     icid = cmdpkt[2] & ICID_MASK;
-
-    cte.rdbase = (cmdpkt[2] & R_MAPC_RDBASE_MASK) >> R_MAPC_RDBASE_SHIFT;
-    cte.rdbase &= RDBASE_PROCNUM_MASK;
-
     cte.valid = cmdpkt[2] & CMD_FIELD_VALID_MASK;
+    if (cte.valid) {
+        cte.rdbase = (cmdpkt[2] & R_MAPC_RDBASE_MASK) >> R_MAPC_RDBASE_SHIFT;
+        cte.rdbase &= RDBASE_PROCNUM_MASK;
+    } else {
+        cte.rdbase = 0;
+    }
 
-    if ((icid >= s->ct.num_entries) || (cte.rdbase >= s->gicv3->num_cpu)) {
+    if (icid >= s->ct.num_entries) {
+        qemu_log_mask(LOG_GUEST_ERROR, "ITS MAPC: invalid ICID 0x%d", icid);
+        return CMD_CONTINUE;
+    }
+    if (cte.valid && cte.rdbase >= s->gicv3->num_cpu) {
         qemu_log_mask(LOG_GUEST_ERROR,
-                      "ITS MAPC: invalid collection table attributes "
-                      "icid %d rdbase %u\n",  icid, cte.rdbase);
-        /*
-         * in this implementation, in case of error
-         * we ignore this command and move onto the next
-         * command in the queue
-         */
+                      "ITS MAPC: invalid RDBASE %u ", cte.rdbase);
         return CMD_CONTINUE;
     }
 
-- 
2.25.1

[PULL 37/39] hw/intc/arm_gicv3_its: Don't allow intid 1023 in MAPI/MAPTI

[Peter Maydell]

When handling MAPI/MAPTI, we allow the supplied interrupt ID to be
either 1023 or something in the valid LPI range.  This is a mistake:
only a real valid LPI is allowed.  (The general behaviour of the ITS
is that most interrupt ID fields require a value in the LPI range;
the exception is that fields specifying a doorbell value, which are
all in GICv4 commands, allow also 1023 to mean "no doorbell".)
Remove the condition that incorrectly allows 1023 here.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220201193207.2771604-13-peter.maydell@linaro.org
---
 hw/intc/arm_gicv3_its.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/hw/intc/arm_gicv3_its.c b/hw/intc/arm_gicv3_its.c
index 069991f7f36..8dade9440ac 100644
--- a/hw/intc/arm_gicv3_its.c
+++ b/hw/intc/arm_gicv3_its.c
@@ -406,8 +406,7 @@ static ItsCmdResult process_mapti(GICv3ITSState *s, const uint64_t *cmdpkt,
 
     if ((icid >= s->ct.num_entries)
             || !dte.valid || (eventid >= num_eventids) ||
-            (((pIntid < GICV3_LPI_INTID_START) || (pIntid >= num_intids)) &&
-             (pIntid != INTID_SPURIOUS))) {
+            (((pIntid < GICV3_LPI_INTID_START) || (pIntid >= num_intids)))) {
         qemu_log_mask(LOG_GUEST_ERROR,
                       "%s: invalid command attributes "
                       "icid %d or eventid %d or pIntid %d or"
-- 
2.25.1

[PULL 38/39] hw/intc/arm_gicv3_its: Split error checks

[Peter Maydell]

In most of the ITS command processing, we check different error
possibilities one at a time and log them appropriately. In
process_mapti() and process_mapd() we have code which checks
multiple error cases at once, which means the logging is less
specific than it could be. Split those cases up.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220201193207.2771604-14-peter.maydell@linaro.org
---
 hw/intc/arm_gicv3_its.c | 52 ++++++++++++++++++++++++-----------------
 1 file changed, 31 insertions(+), 21 deletions(-)

diff --git a/hw/intc/arm_gicv3_its.c b/hw/intc/arm_gicv3_its.c
index 8dade9440ac..4f598d3c14f 100644
--- a/hw/intc/arm_gicv3_its.c
+++ b/hw/intc/arm_gicv3_its.c
@@ -404,19 +404,29 @@ static ItsCmdResult process_mapti(GICv3ITSState *s, const uint64_t *cmdpkt,
     num_eventids = 1ULL << (dte.size + 1);
     num_intids = 1ULL << (GICD_TYPER_IDBITS + 1);
 
-    if ((icid >= s->ct.num_entries)
-            || !dte.valid || (eventid >= num_eventids) ||
-            (((pIntid < GICV3_LPI_INTID_START) || (pIntid >= num_intids)))) {
+    if (icid >= s->ct.num_entries) {
         qemu_log_mask(LOG_GUEST_ERROR,
-                      "%s: invalid command attributes "
-                      "icid %d or eventid %d or pIntid %d or"
-                      "unmapped dte %d\n", __func__, icid, eventid,
-                      pIntid, dte.valid);
-        /*
-         * in this implementation, in case of error
-         * we ignore this command and move onto the next
-         * command in the queue
-         */
+                      "%s: invalid ICID 0x%x >= 0x%x\n",
+                      __func__, icid, s->ct.num_entries);
+        return CMD_CONTINUE;
+    }
+
+    if (!dte.valid) {
+        qemu_log_mask(LOG_GUEST_ERROR,
+                      "%s: no valid DTE for devid 0x%x\n", __func__, devid);
+        return CMD_CONTINUE;
+    }
+
+    if (eventid >= num_eventids) {
+        qemu_log_mask(LOG_GUEST_ERROR,
+                      "%s: invalid event ID 0x%x >= 0x%" PRIx64 "\n",
+                      __func__, eventid, num_eventids);
+        return CMD_CONTINUE;
+    }
+
+    if (pIntid < GICV3_LPI_INTID_START || pIntid >= num_intids) {
+        qemu_log_mask(LOG_GUEST_ERROR,
+                      "%s: invalid interrupt ID 0x%x\n", __func__, pIntid);
         return CMD_CONTINUE;
     }
 
@@ -529,16 +539,16 @@ static ItsCmdResult process_mapd(GICv3ITSState *s, const uint64_t *cmdpkt)
     dte.ittaddr = (cmdpkt[2] & ITTADDR_MASK) >> ITTADDR_SHIFT;
     dte.valid = cmdpkt[2] & CMD_FIELD_VALID_MASK;
 
-    if ((devid >= s->dt.num_entries) ||
-        (dte.size > FIELD_EX64(s->typer, GITS_TYPER, IDBITS))) {
+    if (devid >= s->dt.num_entries) {
         qemu_log_mask(LOG_GUEST_ERROR,
-                      "ITS MAPD: invalid device table attributes "
-                      "devid %d or size %d\n", devid, dte.size);
-        /*
-         * in this implementation, in case of error
-         * we ignore this command and move onto the next
-         * command in the queue
-         */
+                      "ITS MAPD: invalid device ID field 0x%x >= 0x%x\n",
+                      devid, s->dt.num_entries);
+        return CMD_CONTINUE;
+    }
+
+    if (dte.size > FIELD_EX64(s->typer, GITS_TYPER, IDBITS)) {
+        qemu_log_mask(LOG_GUEST_ERROR,
+                      "ITS MAPD: invalid size %d\n", dte.size);
         return CMD_CONTINUE;
     }
 
-- 
2.25.1

[PULL 39/39] hw/sensor: Add lsm303dlhc magnetometer device

[Peter Maydell]

From: Kevin Townsend <kevin.townsend@linaro.org>

This commit adds emulation of the magnetometer on the LSM303DLHC.
It allows the magnetometer's X, Y and Z outputs to be set via the
mag-x, mag-y and mag-z properties, as well as the 12-bit
temperature output via the temperature property. Sensor can be
enabled with 'CONFIG_LSM303DLHC_MAG=y'.

Signed-off-by: Kevin Townsend <kevin.townsend@linaro.org>
Message-id: 20220130095032.35392-1-kevin.townsend@linaro.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 hw/sensor/lsm303dlhc_mag.c        | 556 ++++++++++++++++++++++++++++++
 tests/qtest/lsm303dlhc-mag-test.c | 148 ++++++++
 hw/sensor/Kconfig                 |   4 +
 hw/sensor/meson.build             |   1 +
 tests/qtest/meson.build           |   1 +
 5 files changed, 710 insertions(+)
 create mode 100644 hw/sensor/lsm303dlhc_mag.c
 create mode 100644 tests/qtest/lsm303dlhc-mag-test.c

diff --git a/hw/sensor/lsm303dlhc_mag.c b/hw/sensor/lsm303dlhc_mag.c
new file mode 100644
index 00000000000..4c98ddbf207
--- /dev/null
+++ b/hw/sensor/lsm303dlhc_mag.c
@@ -0,0 +1,556 @@
+/*
+ * LSM303DLHC I2C magnetometer.
+ *
+ * Copyright (C) 2021 Linaro Ltd.
+ * Written by Kevin Townsend <kevin.townsend@linaro.org>
+ *
+ * Based on: https://www.st.com/resource/en/datasheet/lsm303dlhc.pdf
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+/*
+ * The I2C address associated with this device is set on the command-line when
+ * initialising the machine, but the following address is standard: 0x1E.
+ *
+ * Get and set functions for 'mag-x', 'mag-y' and 'mag-z' assume that
+ * 1 = 0.001 uT. (NOTE the 1 gauss = 100 uT, so setting a value of 100,000
+ * would be equal to 1 gauss or 100 uT.)
+ *
+ * Get and set functions for 'temperature' assume that 1 = 0.001 C, so 23.6 C
+ * would be equal to 23600.
+ */
+
+#include "qemu/osdep.h"
+#include "hw/i2c/i2c.h"
+#include "migration/vmstate.h"
+#include "qapi/error.h"
+#include "qapi/visitor.h"
+#include "qemu/module.h"
+#include "qemu/log.h"
+#include "qemu/bswap.h"
+
+enum LSM303DLHCMagReg {
+    LSM303DLHC_MAG_REG_CRA          = 0x00,
+    LSM303DLHC_MAG_REG_CRB          = 0x01,
+    LSM303DLHC_MAG_REG_MR           = 0x02,
+    LSM303DLHC_MAG_REG_OUT_X_H      = 0x03,
+    LSM303DLHC_MAG_REG_OUT_X_L      = 0x04,
+    LSM303DLHC_MAG_REG_OUT_Z_H      = 0x05,
+    LSM303DLHC_MAG_REG_OUT_Z_L      = 0x06,
+    LSM303DLHC_MAG_REG_OUT_Y_H      = 0x07,
+    LSM303DLHC_MAG_REG_OUT_Y_L      = 0x08,
+    LSM303DLHC_MAG_REG_SR           = 0x09,
+    LSM303DLHC_MAG_REG_IRA          = 0x0A,
+    LSM303DLHC_MAG_REG_IRB          = 0x0B,
+    LSM303DLHC_MAG_REG_IRC          = 0x0C,
+    LSM303DLHC_MAG_REG_TEMP_OUT_H   = 0x31,
+    LSM303DLHC_MAG_REG_TEMP_OUT_L   = 0x32
+};
+
+typedef struct LSM303DLHCMagState {
+    I2CSlave parent_obj;
+    uint8_t cra;
+    uint8_t crb;
+    uint8_t mr;
+    int16_t x;
+    int16_t z;
+    int16_t y;
+    int16_t x_lock;
+    int16_t z_lock;
+    int16_t y_lock;
+    uint8_t sr;
+    uint8_t ira;
+    uint8_t irb;
+    uint8_t irc;
+    int16_t temperature;
+    int16_t temperature_lock;
+    uint8_t len;
+    uint8_t buf;
+    uint8_t pointer;
+} LSM303DLHCMagState;
+
+#define TYPE_LSM303DLHC_MAG "lsm303dlhc_mag"
+OBJECT_DECLARE_SIMPLE_TYPE(LSM303DLHCMagState, LSM303DLHC_MAG)
+
+/*
+ * Conversion factor from Gauss to sensor values for each GN gain setting,
+ * in units "lsb per Gauss" (see data sheet table 3). There is no documented
+ * behaviour if the GN setting in CRB is incorrectly set to 0b000;
+ * we arbitrarily make it the same as 0b001.
+ */
+uint32_t xy_gain[] = { 1100, 1100, 855, 670, 450, 400, 330, 230 };
+uint32_t z_gain[] = { 980, 980, 760, 600, 400, 355, 295, 205 };
+
+static void lsm303dlhc_mag_get_x(Object *obj, Visitor *v, const char *name,
+                                 void *opaque, Error **errp)
+{
+    LSM303DLHCMagState *s = LSM303DLHC_MAG(obj);
+    int gm = extract32(s->crb, 5, 3);
+
+    /* Convert to uT where 1000 = 1 uT. Conversion factor depends on gain. */
+    int64_t value = muldiv64(s->x, 100000, xy_gain[gm]);
+    visit_type_int(v, name, &value, errp);
+}
+
+static void lsm303dlhc_mag_get_y(Object *obj, Visitor *v, const char *name,
+                                 void *opaque, Error **errp)
+{
+    LSM303DLHCMagState *s = LSM303DLHC_MAG(obj);
+    int gm = extract32(s->crb, 5, 3);
+
+    /* Convert to uT where 1000 = 1 uT. Conversion factor depends on gain. */
+    int64_t value = muldiv64(s->y, 100000, xy_gain[gm]);
+    visit_type_int(v, name, &value, errp);
+}
+
+static void lsm303dlhc_mag_get_z(Object *obj, Visitor *v, const char *name,
+                                 void *opaque, Error **errp)
+{
+    LSM303DLHCMagState *s = LSM303DLHC_MAG(obj);
+    int gm = extract32(s->crb, 5, 3);
+
+    /* Convert to uT where 1000 = 1 uT. Conversion factor depends on gain. */
+    int64_t value = muldiv64(s->z, 100000, z_gain[gm]);
+    visit_type_int(v, name, &value, errp);
+}
+
+static void lsm303dlhc_mag_set_x(Object *obj, Visitor *v, const char *name,
+                                 void *opaque, Error **errp)
+{
+    LSM303DLHCMagState *s = LSM303DLHC_MAG(obj);
+    int64_t value;
+    int64_t reg;
+    int gm = extract32(s->crb, 5, 3);
+
+    if (!visit_type_int(v, name, &value, errp)) {
+        return;
+    }
+
+    reg = muldiv64(value, xy_gain[gm], 100000);
+
+    /* Make sure we are within a 12-bit limit. */
+    if (reg > 2047 || reg < -2048) {
+        error_setg(errp, "value %" PRId64 " out of register's range", value);
+        return;
+    }
+
+    s->x = (int16_t)reg;
+}
+
+static void lsm303dlhc_mag_set_y(Object *obj, Visitor *v, const char *name,
+                                 void *opaque, Error **errp)
+{
+    LSM303DLHCMagState *s = LSM303DLHC_MAG(obj);
+    int64_t value;
+    int64_t reg;
+    int gm = extract32(s->crb, 5, 3);
+
+    if (!visit_type_int(v, name, &value, errp)) {
+        return;
+    }
+
+    reg = muldiv64(value, xy_gain[gm], 100000);
+
+    /* Make sure we are within a 12-bit limit. */
+    if (reg > 2047 || reg < -2048) {
+        error_setg(errp, "value %" PRId64 " out of register's range", value);
+        return;
+    }
+
+    s->y = (int16_t)reg;
+}
+
+static void lsm303dlhc_mag_set_z(Object *obj, Visitor *v, const char *name,
+                                 void *opaque, Error **errp)
+{
+    LSM303DLHCMagState *s = LSM303DLHC_MAG(obj);
+    int64_t value;
+    int64_t reg;
+    int gm = extract32(s->crb, 5, 3);
+
+    if (!visit_type_int(v, name, &value, errp)) {
+        return;
+    }
+
+    reg = muldiv64(value, z_gain[gm], 100000);
+
+    /* Make sure we are within a 12-bit limit. */
+    if (reg > 2047 || reg < -2048) {
+        error_setg(errp, "value %" PRId64 " out of register's range", value);
+        return;
+    }
+
+    s->z = (int16_t)reg;
+}
+
+/*
+ * Get handler for the temperature property.
+ */
+static void lsm303dlhc_mag_get_temperature(Object *obj, Visitor *v,
+                                           const char *name, void *opaque,
+                                           Error **errp)
+{
+    LSM303DLHCMagState *s = LSM303DLHC_MAG(obj);
+    int64_t value;
+
+    /* Convert to 1 lsb = 0.125 C to 1 = 0.001 C for 'temperature' property. */
+    value = s->temperature * 125;
+
+    visit_type_int(v, name, &value, errp);
+}
+
+/*
+ * Set handler for the temperature property.
+ */
+static void lsm303dlhc_mag_set_temperature(Object *obj, Visitor *v,
+                                           const char *name, void *opaque,
+                                           Error **errp)
+{
+    LSM303DLHCMagState *s = LSM303DLHC_MAG(obj);
+    int64_t value;
+
+    if (!visit_type_int(v, name, &value, errp)) {
+        return;
+    }
+
+    /* Input temperature is in 0.001 C units. Convert to 1 lsb = 0.125 C. */
+    value /= 125;
+
+    if (value > 2047 || value < -2048) {
+        error_setg(errp, "value %" PRId64 " lsb is out of range", value);
+        return;
+    }
+
+    s->temperature = (int16_t)value;
+}
+
+/*
+ * Callback handler whenever a 'I2C_START_RECV' (read) event is received.
+ */
+static void lsm303dlhc_mag_read(LSM303DLHCMagState *s)
+{
+    /*
+     * Set the LOCK bit whenever a new read attempt is made. This will be
+     * cleared in I2C_FINISH. Note that DRDY is always set to 1 in this driver.
+     */
+    s->sr = 0x3;
+
+    /*
+     * Copy the current X/Y/Z and temp. values into the locked registers so
+     * that 'mag-x', 'mag-y', 'mag-z' and 'temperature' can continue to be
+     * updated via QOM, etc., without corrupting the current read event.
+     */
+    s->x_lock = s->x;
+    s->z_lock = s->z;
+    s->y_lock = s->y;
+    s->temperature_lock = s->temperature;
+}
+
+/*
+ * Callback handler whenever a 'I2C_FINISH' event is received.
+ */
+static void lsm303dlhc_mag_finish(LSM303DLHCMagState *s)
+{
+    /*
+     * Clear the LOCK bit when the read attempt terminates.
+     * This bit is initially set in the I2C_START_RECV handler.
+     */
+    s->sr = 0x1;
+}
+
+/*
+ * Callback handler when a device attempts to write to a register.
+ */
+static void lsm303dlhc_mag_write(LSM303DLHCMagState *s)
+{
+    switch (s->pointer) {
+    case LSM303DLHC_MAG_REG_CRA:
+        s->cra = s->buf;
+        break;
+    case LSM303DLHC_MAG_REG_CRB:
+        /* Make sure gain is at least 1, falling back to 1 on an error. */
+        if (s->buf >> 5 == 0) {
+            s->buf = 1 << 5;
+        }
+        s->crb = s->buf;
+        break;
+    case LSM303DLHC_MAG_REG_MR:
+        s->mr = s->buf;
+        break;
+    case LSM303DLHC_MAG_REG_SR:
+        s->sr = s->buf;
+        break;
+    case LSM303DLHC_MAG_REG_IRA:
+        s->ira = s->buf;
+        break;
+    case LSM303DLHC_MAG_REG_IRB:
+        s->irb = s->buf;
+        break;
+    case LSM303DLHC_MAG_REG_IRC:
+        s->irc = s->buf;
+        break;
+    default:
+        qemu_log_mask(LOG_GUEST_ERROR, "reg is read-only: 0x%02X", s->buf);
+        break;
+    }
+}
+
+/*
+ * Low-level master-to-slave transaction handler.
+ */
+static int lsm303dlhc_mag_send(I2CSlave *i2c, uint8_t data)
+{
+    LSM303DLHCMagState *s = LSM303DLHC_MAG(i2c);
+
+    if (s->len == 0) {
+        /* First byte is the reg pointer */
+        s->pointer = data;
+        s->len++;
+    } else if (s->len == 1) {
+        /* Second byte is the new register value. */
+        s->buf = data;
+        lsm303dlhc_mag_write(s);
+    } else {
+        g_assert_not_reached();
+    }
+
+    return 0;
+}
+
+/*
+ * Low-level slave-to-master transaction handler (read attempts).
+ */
+static uint8_t lsm303dlhc_mag_recv(I2CSlave *i2c)
+{
+    LSM303DLHCMagState *s = LSM303DLHC_MAG(i2c);
+    uint8_t resp;
+
+    switch (s->pointer) {
+    case LSM303DLHC_MAG_REG_CRA:
+        resp = s->cra;
+        break;
+    case LSM303DLHC_MAG_REG_CRB:
+        resp = s->crb;
+        break;
+    case LSM303DLHC_MAG_REG_MR:
+        resp = s->mr;
+        break;
+    case LSM303DLHC_MAG_REG_OUT_X_H:
+        resp = (uint8_t)(s->x_lock >> 8);
+        break;
+    case LSM303DLHC_MAG_REG_OUT_X_L:
+        resp = (uint8_t)(s->x_lock);
+        break;
+    case LSM303DLHC_MAG_REG_OUT_Z_H:
+        resp = (uint8_t)(s->z_lock >> 8);
+        break;
+    case LSM303DLHC_MAG_REG_OUT_Z_L:
+        resp = (uint8_t)(s->z_lock);
+        break;
+    case LSM303DLHC_MAG_REG_OUT_Y_H:
+        resp = (uint8_t)(s->y_lock >> 8);
+        break;
+    case LSM303DLHC_MAG_REG_OUT_Y_L:
+        resp = (uint8_t)(s->y_lock);
+        break;
+    case LSM303DLHC_MAG_REG_SR:
+        resp = s->sr;
+        break;
+    case LSM303DLHC_MAG_REG_IRA:
+        resp = s->ira;
+        break;
+    case LSM303DLHC_MAG_REG_IRB:
+        resp = s->irb;
+        break;
+    case LSM303DLHC_MAG_REG_IRC:
+        resp = s->irc;
+        break;
+    case LSM303DLHC_MAG_REG_TEMP_OUT_H:
+        /* Check if the temperature sensor is enabled or not (CRA & 0x80). */
+        if (s->cra & 0x80) {
+            resp = (uint8_t)(s->temperature_lock >> 8);
+        } else {
+            resp = 0;
+        }
+        break;
+    case LSM303DLHC_MAG_REG_TEMP_OUT_L:
+        if (s->cra & 0x80) {
+            resp = (uint8_t)(s->temperature_lock & 0xff);
+        } else {
+            resp = 0;
+        }
+        break;
+    default:
+        resp = 0;
+        break;
+    }
+
+    /*
+     * The address pointer on the LSM303DLHC auto-increments whenever a byte
+     * is read, without the master device having to request the next address.
+     *
+     * The auto-increment process has the following logic:
+     *
+     *   - if (s->pointer == 8) then s->pointer = 3
+     *   - else: if (s->pointer == 12) then s->pointer = 0
+     *   - else: s->pointer += 1
+     *
+     * Reading an invalid address return 0.
+     */
+    if (s->pointer == LSM303DLHC_MAG_REG_OUT_Y_L) {
+        s->pointer = LSM303DLHC_MAG_REG_OUT_X_H;
+    } else if (s->pointer == LSM303DLHC_MAG_REG_IRC) {
+        s->pointer = LSM303DLHC_MAG_REG_CRA;
+    } else {
+        s->pointer++;
+    }
+
+    return resp;
+}
+
+/*
+ * Bus state change handler.
+ */
+static int lsm303dlhc_mag_event(I2CSlave *i2c, enum i2c_event event)
+{
+    LSM303DLHCMagState *s = LSM303DLHC_MAG(i2c);
+
+    switch (event) {
+    case I2C_START_SEND:
+        break;
+    case I2C_START_RECV:
+        lsm303dlhc_mag_read(s);
+        break;
+    case I2C_FINISH:
+        lsm303dlhc_mag_finish(s);
+        break;
+    case I2C_NACK:
+        break;
+    }
+
+    s->len = 0;
+    return 0;
+}
+
+/*
+ * Device data description using VMSTATE macros.
+ */
+static const VMStateDescription vmstate_lsm303dlhc_mag = {
+    .name = "LSM303DLHC_MAG",
+    .version_id = 0,
+    .minimum_version_id = 0,
+    .fields = (VMStateField[]) {
+
+        VMSTATE_I2C_SLAVE(parent_obj, LSM303DLHCMagState),
+        VMSTATE_UINT8(len, LSM303DLHCMagState),
+        VMSTATE_UINT8(buf, LSM303DLHCMagState),
+        VMSTATE_UINT8(pointer, LSM303DLHCMagState),
+        VMSTATE_UINT8(cra, LSM303DLHCMagState),
+        VMSTATE_UINT8(crb, LSM303DLHCMagState),
+        VMSTATE_UINT8(mr, LSM303DLHCMagState),
+        VMSTATE_INT16(x, LSM303DLHCMagState),
+        VMSTATE_INT16(z, LSM303DLHCMagState),
+        VMSTATE_INT16(y, LSM303DLHCMagState),
+        VMSTATE_INT16(x_lock, LSM303DLHCMagState),
+        VMSTATE_INT16(z_lock, LSM303DLHCMagState),
+        VMSTATE_INT16(y_lock, LSM303DLHCMagState),
+        VMSTATE_UINT8(sr, LSM303DLHCMagState),
+        VMSTATE_UINT8(ira, LSM303DLHCMagState),
+        VMSTATE_UINT8(irb, LSM303DLHCMagState),
+        VMSTATE_UINT8(irc, LSM303DLHCMagState),
+        VMSTATE_INT16(temperature, LSM303DLHCMagState),
+        VMSTATE_INT16(temperature_lock, LSM303DLHCMagState),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
+/*
+ * Put the device into post-reset default state.
+ */
+static void lsm303dlhc_mag_default_cfg(LSM303DLHCMagState *s)
+{
+    /* Set the device into is default reset state. */
+    s->len = 0;
+    s->pointer = 0;         /* Current register. */
+    s->buf = 0;             /* Shared buffer. */
+    s->cra = 0x10;          /* Temp Enabled = 0, Data Rate = 15.0 Hz. */
+    s->crb = 0x20;          /* Gain = +/- 1.3 Gauss. */
+    s->mr = 0x3;            /* Operating Mode = Sleep. */
+    s->x = 0;
+    s->z = 0;
+    s->y = 0;
+    s->x_lock = 0;
+    s->z_lock = 0;
+    s->y_lock = 0;
+    s->sr = 0x1;            /* DRDY = 1. */
+    s->ira = 0x48;
+    s->irb = 0x34;
+    s->irc = 0x33;
+    s->temperature = 0;     /* Default to 0 degrees C (0/8 lsb = 0 C). */
+    s->temperature_lock = 0;
+}
+
+/*
+ * Callback handler when DeviceState 'reset' is set to true.
+ */
+static void lsm303dlhc_mag_reset(DeviceState *dev)
+{
+    I2CSlave *i2c = I2C_SLAVE(dev);
+    LSM303DLHCMagState *s = LSM303DLHC_MAG(i2c);
+
+    /* Set the device into its default reset state. */
+    lsm303dlhc_mag_default_cfg(s);
+}
+
+/*
+ * Initialisation of any public properties.
+ */
+static void lsm303dlhc_mag_initfn(Object *obj)
+{
+    object_property_add(obj, "mag-x", "int",
+                lsm303dlhc_mag_get_x,
+                lsm303dlhc_mag_set_x, NULL, NULL);
+
+    object_property_add(obj, "mag-y", "int",
+                lsm303dlhc_mag_get_y,
+                lsm303dlhc_mag_set_y, NULL, NULL);
+
+    object_property_add(obj, "mag-z", "int",
+                lsm303dlhc_mag_get_z,
+                lsm303dlhc_mag_set_z, NULL, NULL);
+
+    object_property_add(obj, "temperature", "int",
+                lsm303dlhc_mag_get_temperature,
+                lsm303dlhc_mag_set_temperature, NULL, NULL);
+}
+
+/*
+ * Set the virtual method pointers (bus state change, tx/rx, etc.).
+ */
+static void lsm303dlhc_mag_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    I2CSlaveClass *k = I2C_SLAVE_CLASS(klass);
+
+    dc->reset = lsm303dlhc_mag_reset;
+    dc->vmsd = &vmstate_lsm303dlhc_mag;
+    k->event = lsm303dlhc_mag_event;
+    k->recv = lsm303dlhc_mag_recv;
+    k->send = lsm303dlhc_mag_send;
+}
+
+static const TypeInfo lsm303dlhc_mag_info = {
+    .name = TYPE_LSM303DLHC_MAG,
+    .parent = TYPE_I2C_SLAVE,
+    .instance_size = sizeof(LSM303DLHCMagState),
+    .instance_init = lsm303dlhc_mag_initfn,
+    .class_init = lsm303dlhc_mag_class_init,
+};
+
+static void lsm303dlhc_mag_register_types(void)
+{
+    type_register_static(&lsm303dlhc_mag_info);
+}
+
+type_init(lsm303dlhc_mag_register_types)
diff --git a/tests/qtest/lsm303dlhc-mag-test.c b/tests/qtest/lsm303dlhc-mag-test.c
new file mode 100644
index 00000000000..0f64e7fc67d
--- /dev/null
+++ b/tests/qtest/lsm303dlhc-mag-test.c
@@ -0,0 +1,148 @@
+/*
+ * QTest testcase for the LSM303DLHC I2C magnetometer
+ *
+ * Copyright (C) 2021 Linaro Ltd.
+ * Written by Kevin Townsend <kevin.townsend@linaro.org>
+ *
+ * Based on: https://www.st.com/resource/en/datasheet/lsm303dlhc.pdf
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "qemu/osdep.h"
+#include "libqtest-single.h"
+#include "libqos/qgraph.h"
+#include "libqos/i2c.h"
+#include "qapi/qmp/qdict.h"
+
+#define LSM303DLHC_MAG_TEST_ID        "lsm303dlhc_mag-test"
+#define LSM303DLHC_MAG_REG_CRA        0x00
+#define LSM303DLHC_MAG_REG_CRB        0x01
+#define LSM303DLHC_MAG_REG_OUT_X_H    0x03
+#define LSM303DLHC_MAG_REG_OUT_Z_H    0x05
+#define LSM303DLHC_MAG_REG_OUT_Y_H    0x07
+#define LSM303DLHC_MAG_REG_IRC        0x0C
+#define LSM303DLHC_MAG_REG_TEMP_OUT_H 0x31
+
+static int qmp_lsm303dlhc_mag_get_property(const char *id, const char *prop)
+{
+    QDict *response;
+    int ret;
+
+    response = qmp("{ 'execute': 'qom-get', 'arguments': { 'path': %s, "
+                   "'property': %s } }", id, prop);
+    g_assert(qdict_haskey(response, "return"));
+    ret = qdict_get_int(response, "return");
+    qobject_unref(response);
+    return ret;
+}
+
+static void qmp_lsm303dlhc_mag_set_property(const char *id, const char *prop,
+                                            int value)
+{
+    QDict *response;
+
+    response = qmp("{ 'execute': 'qom-set', 'arguments': { 'path': %s, "
+                   "'property': %s, 'value': %d } }", id, prop, value);
+    g_assert(qdict_haskey(response, "return"));
+    qobject_unref(response);
+}
+
+static void send_and_receive(void *obj, void *data, QGuestAllocator *alloc)
+{
+    int64_t value;
+    QI2CDevice *i2cdev = (QI2CDevice *)obj;
+
+    /* Check default value for CRB */
+    g_assert_cmphex(i2c_get8(i2cdev, LSM303DLHC_MAG_REG_CRB), ==, 0x20);
+
+    /* Set x to 1.0 gauss and verify the value */
+    qmp_lsm303dlhc_mag_set_property(LSM303DLHC_MAG_TEST_ID, "mag-x", 100000);
+    value = qmp_lsm303dlhc_mag_get_property(
+        LSM303DLHC_MAG_TEST_ID, "mag-x");
+    g_assert_cmpint(value, ==, 100000);
+
+    /* Set y to 1.5 gauss and verify the value */
+    qmp_lsm303dlhc_mag_set_property(LSM303DLHC_MAG_TEST_ID, "mag-y", 150000);
+    value = qmp_lsm303dlhc_mag_get_property(
+        LSM303DLHC_MAG_TEST_ID, "mag-y");
+    g_assert_cmpint(value, ==, 150000);
+
+    /* Set z to 0.5 gauss and verify the value */
+    qmp_lsm303dlhc_mag_set_property(LSM303DLHC_MAG_TEST_ID, "mag-z", 50000);
+    value = qmp_lsm303dlhc_mag_get_property(
+        LSM303DLHC_MAG_TEST_ID, "mag-z");
+    g_assert_cmpint(value, ==, 50000);
+
+    /* Set temperature to 23.6 C and verify the value */
+    qmp_lsm303dlhc_mag_set_property(LSM303DLHC_MAG_TEST_ID,
+        "temperature", 23600);
+    value = qmp_lsm303dlhc_mag_get_property(
+        LSM303DLHC_MAG_TEST_ID, "temperature");
+    /* Should return 23.5 C due to 0.125°C steps. */
+    g_assert_cmpint(value, ==, 23500);
+
+    /* Read raw x axis registers (1 gauss = 1100 at +/-1.3 g gain) */
+    value = i2c_get16(i2cdev, LSM303DLHC_MAG_REG_OUT_X_H);
+    g_assert_cmphex(value, ==, 1100);
+
+    /* Read raw y axis registers (1.5 gauss = 1650 at +/- 1.3 g gain = ) */
+    value = i2c_get16(i2cdev, LSM303DLHC_MAG_REG_OUT_Y_H);
+    g_assert_cmphex(value, ==, 1650);
+
+    /* Read raw z axis registers (0.5 gauss = 490 at +/- 1.3 g gain = ) */
+    value = i2c_get16(i2cdev, LSM303DLHC_MAG_REG_OUT_Z_H);
+    g_assert_cmphex(value, ==, 490);
+
+    /* Read raw temperature registers with temp disabled (CRA = 0x10) */
+    value = i2c_get16(i2cdev, LSM303DLHC_MAG_REG_TEMP_OUT_H);
+    g_assert_cmphex(value, ==, 0);
+
+    /* Enable temperature reads (CRA = 0x90) */
+    i2c_set8(i2cdev, LSM303DLHC_MAG_REG_CRA, 0x90);
+
+    /* Read raw temp registers (23.5 C = 188 at 1 lsb = 0.125 C) */
+    value = i2c_get16(i2cdev, LSM303DLHC_MAG_REG_TEMP_OUT_H);
+    g_assert_cmphex(value, ==, 188);
+}
+
+static void reg_wraparound(void *obj, void *data, QGuestAllocator *alloc)
+{
+    uint8_t value[4];
+    QI2CDevice *i2cdev = (QI2CDevice *)obj;
+
+    /* Set x to 1.0 gauss, and y to 1.5 gauss for known test values */
+    qmp_lsm303dlhc_mag_set_property(LSM303DLHC_MAG_TEST_ID, "mag-x", 100000);
+    qmp_lsm303dlhc_mag_set_property(LSM303DLHC_MAG_TEST_ID, "mag-y", 150000);
+
+    /* Check that requesting 4 bytes starting at Y_H wraps around to X_L */
+    i2c_read_block(i2cdev, LSM303DLHC_MAG_REG_OUT_Y_H, value, 4);
+    /* 1.5 gauss = 1650 lsb = 0x672 */
+    g_assert_cmphex(value[0], ==, 0x06);
+    g_assert_cmphex(value[1], ==, 0x72);
+    /* 1.0 gauss = 1100 lsb = 0x44C */
+    g_assert_cmphex(value[2], ==, 0x04);
+    g_assert_cmphex(value[3], ==, 0x4C);
+
+    /* Check that requesting LSM303DLHC_MAG_REG_IRC wraps around to CRA */
+    i2c_read_block(i2cdev, LSM303DLHC_MAG_REG_IRC, value, 2);
+    /* Default value for IRC = 0x33 */
+    g_assert_cmphex(value[0], ==, 0x33);
+    /* Default value for CRA = 0x10 */
+    g_assert_cmphex(value[1], ==, 0x10);
+}
+
+static void lsm303dlhc_mag_register_nodes(void)
+{
+    QOSGraphEdgeOptions opts = {
+        .extra_device_opts = "id=" LSM303DLHC_MAG_TEST_ID ",address=0x1e"
+    };
+    add_qi2c_address(&opts, &(QI2CAddress) { 0x1E });
+
+    qos_node_create_driver("lsm303dlhc_mag", i2c_device_create);
+    qos_node_consumes("lsm303dlhc_mag", "i2c-bus", &opts);
+
+    qos_add_test("tx-rx", "lsm303dlhc_mag", send_and_receive, NULL);
+    qos_add_test("regwrap", "lsm303dlhc_mag", reg_wraparound, NULL);
+}
+libqos_init(lsm303dlhc_mag_register_nodes);
diff --git a/hw/sensor/Kconfig b/hw/sensor/Kconfig
index 9c8a049b068..b317f91b7b4 100644
--- a/hw/sensor/Kconfig
+++ b/hw/sensor/Kconfig
@@ -21,3 +21,7 @@ config ADM1272
 config MAX34451
     bool
     depends on I2C
+
+config LSM303DLHC_MAG
+    bool
+    depends on I2C
diff --git a/hw/sensor/meson.build b/hw/sensor/meson.build
index 059c4ca935b..d1bba290dad 100644
--- a/hw/sensor/meson.build
+++ b/hw/sensor/meson.build
@@ -4,3 +4,4 @@ softmmu_ss.add(when: 'CONFIG_DPS310', if_true: files('dps310.c'))
 softmmu_ss.add(when: 'CONFIG_EMC141X', if_true: files('emc141x.c'))
 softmmu_ss.add(when: 'CONFIG_ADM1272', if_true: files('adm1272.c'))
 softmmu_ss.add(when: 'CONFIG_MAX34451', if_true: files('max34451.c'))
+softmmu_ss.add(when: 'CONFIG_LSM303DLHC_MAG', if_true: files('lsm303dlhc_mag.c'))
diff --git a/tests/qtest/meson.build b/tests/qtest/meson.build
index 762f6adcd5e..f33d84d19bc 100644
--- a/tests/qtest/meson.build
+++ b/tests/qtest/meson.build
@@ -243,6 +243,7 @@ qos_test_ss.add(
   'eepro100-test.c',
   'es1370-test.c',
   'ipoctal232-test.c',
+  'lsm303dlhc-mag-test.c',
   'max34451-test.c',
   'megasas-test.c',
   'ne2000-test.c',
-- 
2.25.1

Re: [PULL 00/39] target-arm queue

[Peter Maydell]

On Tue, 8 Feb 2022 at 11:39, Peter Maydell <peter.maydell@linaro.org> wrote:
>
> The following changes since commit 55ef0b702bc2c90c3c4ed97f97676d8f139e5ca1:
>
>   Merge remote-tracking branch 'remotes/lvivier-gitlab/tags/linux-user-for-7.0-pull-request' into staging (2022-02-07 10:48:25 +0000)
>
> are available in the Git repository at:
>
>   https://git.linaro.org/people/pmaydell/qemu-arm.git tags/pull-target-arm-20220208
>
> for you to fetch changes up to 4fd1ebb10593087d45d2f56f7f3d13447d24802c:
>
>   hw/sensor: Add lsm303dlhc magnetometer device (2022-02-08 10:56:29 +0000)
>
> ----------------------------------------------------------------
> target-arm queue:
>  * Fix handling of SVE ZCR_LEN when using VHE
>  * xlnx-zynqmp: 'Or' the QSPI / QSPI DMA IRQs
>  * Don't ever enable PSCI when booting guest in EL3
>  * Adhere to SMCCC 1.3 section 5.2
>  * highbank: Fix issues with booting SMP
>  * midway: Fix issues booting at all
>  * boot: Drop existing dtb /psci node rather than retaining it
>  * versal-virt: Always call arm_load_kernel()
>  * force flag recalculation when messing with DAIF
>  * hw/timer/armv7m_systick: Update clock source before enabling timer
>  * hw/arm/smmuv3: Fix device reset
>  * hw/intc/arm_gicv3_its: refactorings and minor bug fixes
>  * hw/sensor: Add lsm303dlhc magnetometer device
>


Applied, thanks.

Please update the changelog at https://wiki.qemu.org/ChangeLog/7.0
for any user-visible changes.

-- PMM