Merge tag 'pull-target-arm-20240425' of https://git.linaro.org/people/pmaydell/qemu-arm into staging

target-arm queue:
 * Implement FEAT_NMI and NMI support in the GICv3
 * hw/dma: avoid apparent overflow in soc_dma_set_request
 * linux-user/flatload.c: Remove unused bFLT shared-library and ZFLAT code
 * Add ResetType argument to Resettable hold and exit phase methods
 * Add RESET_TYPE_SNAPSHOT_LOAD ResetType
 * Implement STM32L4x5 USART

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# gpg: Signature made Thu 25 Apr 2024 03:36:03 AM PDT
# gpg:                using RSA key E1A5C593CD419DE28E8315CF3C2525ED14360CDE
# gpg:                issuer "peter.maydell@linaro.org"
# gpg: Good signature from "Peter Maydell <peter.maydell@linaro.org>" [full]
# gpg:                 aka "Peter Maydell <pmaydell@gmail.com>" [full]
# gpg:                 aka "Peter Maydell <pmaydell@chiark.greenend.org.uk>" [full]
# gpg:                 aka "Peter Maydell <peter@archaic.org.uk>" [unknown]

* tag 'pull-target-arm-20240425' of https://git.linaro.org/people/pmaydell/qemu-arm: (37 commits)
  tests/qtest: Add tests for the STM32L4x5 USART
  hw/arm: Add the USART to the stm32l4x5 SoC
  hw/char/stm32l4x5_usart: Add options for serial parameters setting
  hw/char/stm32l4x5_usart: Enable serial read and write
  hw/char: Implement STM32L4x5 USART skeleton
  reset: Add RESET_TYPE_SNAPSHOT_LOAD
  docs/devel/reset: Update to new API for hold and exit phase methods
  hw, target: Add ResetType argument to hold and exit phase methods
  scripts/coccinelle: New script to add ResetType to hold and exit phases
  allwinner-i2c, adm1272: Use device_cold_reset() for software-triggered reset
  hw/misc: Don't special case RESET_TYPE_COLD in npcm7xx_clk, gcr
  linux-user/flatload.c: Remove unused bFLT shared-library and ZFLAT code
  hw/dma: avoid apparent overflow in soc_dma_set_request
  hw/arm/virt: Enable NMI support in the GIC if the CPU has FEAT_NMI
  target/arm: Add FEAT_NMI to max
  hw/intc/arm_gicv3: Report the VINMI interrupt
  hw/intc/arm_gicv3: Report the NMI interrupt in gicv3_cpuif_update()
  hw/intc/arm_gicv3: Implement NMI interrupt priority
  hw/intc/arm_gicv3: Handle icv_nmiar1_read() for icc_nmiar1_read()
  hw/intc/arm_gicv3: Add NMI handling CPU interface registers
  ...

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

1 files changed, 36 insertions, 0 deletions

diff --git a/hw/intc/arm_gicv3_dist.c b/hw/intc/arm_gicv3_dist.c
index 35e850685c..d8207acb22 100644
--- a/hw/intc/arm_gicv3_dist.c
+++ b/hw/intc/arm_gicv3_dist.c
@@ -89,6 +89,29 @@ static int gicd_ns_access(GICv3State *s, int irq)
     return extract32(s->gicd_nsacr[irq / 16], (irq % 16) * 2, 2);
 }
 
+static void gicd_write_bitmap_reg(GICv3State *s, MemTxAttrs attrs,
+                                  uint32_t *bmp, maskfn *maskfn,
+                                  int offset, uint32_t val)
+{
+    /*
+     * Helper routine to implement writing to a "set" register
+     * (GICD_INMIR, etc).
+     * Semantics implemented here:
+     * RAZ/WI for SGIs, PPIs, unimplemented IRQs
+     * Bits corresponding to Group 0 or Secure Group 1 interrupts RAZ/WI.
+     * offset should be the offset in bytes of the register from the start
+     * of its group.
+     */
+    int irq = offset * 8;
+
+    if (irq < GIC_INTERNAL || irq >= s->num_irq) {
+        return;
+    }
+    val &= mask_group_and_nsacr(s, attrs, maskfn, irq);
+    *gic_bmp_ptr32(bmp, irq) = val;
+    gicv3_update(s, irq, 32);
+}
+
 static void gicd_write_set_bitmap_reg(GICv3State *s, MemTxAttrs attrs,
                                       uint32_t *bmp,
                                       maskfn *maskfn,
@@ -389,6 +412,7 @@ static bool gicd_readl(GICv3State *s, hwaddr offset,
          *                      by GICD_TYPER.IDbits)
          * MBIS == 0 (message-based SPIs not supported)
          * SecurityExtn == 1 if security extns supported
+         * NMI = 1 if Non-maskable interrupt property is supported
          * CPUNumber == 0 since for us ARE is always 1
          * ITLinesNumber == (((max SPI IntID + 1) / 32) - 1)
          */
@@ -402,6 +426,7 @@ static bool gicd_readl(GICv3State *s, hwaddr offset,
         bool dvis = s->revision >= 4;
 
         *data = (1 << 25) | (1 << 24) | (dvis << 18) | (sec_extn << 10) |
+            (s->nmi_support << GICD_TYPER_NMI_SHIFT) |
             (s->lpi_enable << GICD_TYPER_LPIS_SHIFT) |
             (0xf << 19) | itlinesnumber;
         return true;
@@ -543,6 +568,11 @@ static bool gicd_readl(GICv3State *s, hwaddr offset,
         /* RAZ/WI since affinity routing is always enabled */
         *data = 0;
         return true;
+    case GICD_INMIR ... GICD_INMIR + 0x7f:
+        *data = (!s->nmi_support) ? 0 :
+                gicd_read_bitmap_reg(s, attrs, s->nmi, NULL,
+                                     offset - GICD_INMIR);
+        return true;
     case GICD_IROUTER ... GICD_IROUTER + 0x1fdf:
     {
         uint64_t r;
@@ -752,6 +782,12 @@ static bool gicd_writel(GICv3State *s, hwaddr offset,
     case GICD_SPENDSGIR ... GICD_SPENDSGIR + 0xf:
         /* RAZ/WI since affinity routing is always enabled */
         return true;
+    case GICD_INMIR ... GICD_INMIR + 0x7f:
+        if (s->nmi_support) {
+            gicd_write_bitmap_reg(s, attrs, s->nmi, NULL,
+                                  offset - GICD_INMIR, value);
+        }
+        return true;
     case GICD_IROUTER ... GICD_IROUTER + 0x1fdf:
     {
         uint64_t r;