[PATCH v6 1/5] hw/nvme: split pmrmsc register into upper and lower

[Klaus Jensen <its@irrelevant.dk>]

From: Klaus Jensen <k.jensen@samsung.com>

The specification uses a set of 32 bit PMRMSCL and PMRMSCU registers to
make up the 64 bit logical PMRMSC register.

Make it so.

Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
---
 include/block/nvme.h | 31 ++++++++++++++++---------------
 hw/nvme/ctrl.c       | 10 ++++++----
 2 files changed, 22 insertions(+), 19 deletions(-)

diff --git a/include/block/nvme.h b/include/block/nvme.h
index 527105fafc0b..84053b68b987 100644
--- a/include/block/nvme.h
+++ b/include/block/nvme.h
@@ -26,7 +26,8 @@ typedef struct QEMU_PACKED NvmeBar {
     uint32_t    pmrsts;
     uint32_t    pmrebs;
     uint32_t    pmrswtp;
-    uint64_t    pmrmsc;
+    uint32_t    pmrmscl;
+    uint32_t    pmrmscu;
     uint8_t     css[484];
 } NvmeBar;
 
@@ -475,25 +476,25 @@ enum NvmePmrswtpMask {
 #define NVME_PMRSWTP_SET_PMRSWTV(pmrswtp, val)   \
     (pmrswtp |= (uint64_t)(val & PMRSWTP_PMRSWTV_MASK) << PMRSWTP_PMRSWTV_SHIFT)
 
-enum NvmePmrmscShift {
-    PMRMSC_CMSE_SHIFT   = 1,
-    PMRMSC_CBA_SHIFT    = 12,
+enum NvmePmrmsclShift {
+    PMRMSCL_CMSE_SHIFT   = 1,
+    PMRMSCL_CBA_SHIFT    = 12,
 };
 
-enum NvmePmrmscMask {
-    PMRMSC_CMSE_MASK   = 0x1,
-    PMRMSC_CBA_MASK    = 0xfffffffffffff,
+enum NvmePmrmsclMask {
+    PMRMSCL_CMSE_MASK   = 0x1,
+    PMRMSCL_CBA_MASK    = 0xfffff,
 };
 
-#define NVME_PMRMSC_CMSE(pmrmsc)    \
-    ((pmrmsc >> PMRMSC_CMSE_SHIFT)   & PMRMSC_CMSE_MASK)
-#define NVME_PMRMSC_CBA(pmrmsc)     \
-    ((pmrmsc >> PMRMSC_CBA_SHIFT)   & PMRMSC_CBA_MASK)
+#define NVME_PMRMSCL_CMSE(pmrmscl)    \
+    ((pmrmscl >> PMRMSCL_CMSE_SHIFT)   & PMRMSCL_CMSE_MASK)
+#define NVME_PMRMSCL_CBA(pmrmscl)     \
+    ((pmrmscl >> PMRMSCL_CBA_SHIFT)   & PMRMSCL_CBA_MASK)
 
-#define NVME_PMRMSC_SET_CMSE(pmrmsc, val)   \
-    (pmrmsc |= (uint64_t)(val & PMRMSC_CMSE_MASK) << PMRMSC_CMSE_SHIFT)
-#define NVME_PMRMSC_SET_CBA(pmrmsc, val)   \
-    (pmrmsc |= (uint64_t)(val & PMRMSC_CBA_MASK) << PMRMSC_CBA_SHIFT)
+#define NVME_PMRMSCL_SET_CMSE(pmrmscl, val)   \
+    (pmrmscl |= (uint32_t)(val & PMRMSCL_CMSE_MASK) << PMRMSCL_CMSE_SHIFT)
+#define NVME_PMRMSCL_SET_CBA(pmrmscl, val)   \
+    (pmrmscl |= (uint32_t)(val & PMRMSCL_CBA_MASK) << PMRMSCL_CBA_SHIFT)
 
 enum NvmeSglDescriptorType {
     NVME_SGL_DESCR_TYPE_DATA_BLOCK          = 0x0,
diff --git a/hw/nvme/ctrl.c b/hw/nvme/ctrl.c
index 2f0524e12a36..070d9f6a962d 100644
--- a/hw/nvme/ctrl.c
+++ b/hw/nvme/ctrl.c
@@ -5916,11 +5916,13 @@ static void nvme_write_bar(NvmeCtrl *n, hwaddr offset, uint64_t data,
             return;
         }
 
-        n->bar.pmrmsc = (n->bar.pmrmsc & ~0xffffffff) | (data & 0xffffffff);
+        n->bar.pmrmscl = data;
         n->pmr.cmse = false;
 
-        if (NVME_PMRMSC_CMSE(n->bar.pmrmsc)) {
-            hwaddr cba = NVME_PMRMSC_CBA(n->bar.pmrmsc) << PMRMSC_CBA_SHIFT;
+        if (NVME_PMRMSCL_CMSE(n->bar.pmrmscl)) {
+            uint64_t pmrmscu = n->bar.pmrmscu;
+            hwaddr cba = (pmrmscu << 32) |
+                (NVME_PMRMSCL_CBA(n->bar.pmrmscl) << PMRMSCL_CBA_SHIFT);
             if (cba + int128_get64(n->pmr.dev->mr.size) < cba) {
                 NVME_PMRSTS_SET_CBAI(n->bar.pmrsts, 1);
                 return;
@@ -5936,7 +5938,7 @@ static void nvme_write_bar(NvmeCtrl *n, hwaddr offset, uint64_t data,
             return;
         }
 
-        n->bar.pmrmsc = (n->bar.pmrmsc & 0xffffffff) | (data << 32);
+        n->bar.pmrmscu = data;
         return;
     default:
         NVME_GUEST_ERR(pci_nvme_ub_mmiowr_invalid,
-- 
2.32.0