From c73b18ef8f2dd15934d90f65ba825bef19d11f73 Mon Sep 17 00:00:00 2001
From: qihao_yewu <qihao_yewu@cmss.chinamobile.com>
Date: Thu, 7 Nov 2024 22:07:23 -0500
Subject: [PATCH] ppc/xive: Fix ESB length overflow on 32-bit hosts

cheery-pick from 07f2770503e24889720028ddf9ef54788ddf3b6d

The length of this region can be > 32-bits, which overflows size_t on
32-bit hosts. Change to uint64_t.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: qihao_yewu <qihao_yewu@cmss.chinamobile.com>
---
 hw/intc/spapr_xive_kvm.c | 4 ++--
 hw/intc/xive.c           | 2 +-
 include/hw/ppc/xive.h    | 2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/hw/intc/spapr_xive_kvm.c b/hw/intc/spapr_xive_kvm.c
index 5789062379..7a86197fc9 100644
--- a/hw/intc/spapr_xive_kvm.c
+++ b/hw/intc/spapr_xive_kvm.c
@@ -720,7 +720,7 @@ int kvmppc_xive_connect(SpaprInterruptController *intc, uint32_t nr_servers,
 {
     SpaprXive *xive = SPAPR_XIVE(intc);
     XiveSource *xsrc = &xive->source;
-    size_t esb_len = xive_source_esb_len(xsrc);
+    uint64_t esb_len = xive_source_esb_len(xsrc);
     size_t tima_len = 4ull << TM_SHIFT;
     CPUState *cs;
     int fd;
@@ -824,7 +824,7 @@ void kvmppc_xive_disconnect(SpaprInterruptController *intc)
 {
     SpaprXive *xive = SPAPR_XIVE(intc);
     XiveSource *xsrc;
-    size_t esb_len;
+    uint64_t esb_len;
 
     assert(xive->fd != -1);
 
diff --git a/hw/intc/xive.c b/hw/intc/xive.c
index a3585593d8..0cfc172dd4 100644
--- a/hw/intc/xive.c
+++ b/hw/intc/xive.c
@@ -1238,7 +1238,7 @@ static void xive_source_reset(void *dev)
 static void xive_source_realize(DeviceState *dev, Error **errp)
 {
     XiveSource *xsrc = XIVE_SOURCE(dev);
-    size_t esb_len = xive_source_esb_len(xsrc);
+    uint64_t esb_len = xive_source_esb_len(xsrc);
 
     assert(xsrc->xive);
 
diff --git a/include/hw/ppc/xive.h b/include/hw/ppc/xive.h
index f120874e0f..00023c0233 100644
--- a/include/hw/ppc/xive.h
+++ b/include/hw/ppc/xive.h
@@ -218,7 +218,7 @@ static inline bool xive_source_esb_has_2page(XiveSource *xsrc)
         xsrc->esb_shift == XIVE_ESB_4K_2PAGE;
 }
 
-static inline size_t xive_source_esb_len(XiveSource *xsrc)
+static inline uint64_t xive_source_esb_len(XiveSource *xsrc)
 {
     return (1ull << xsrc->esb_shift) * xsrc->nr_irqs;
 }
-- 
2.41.0.windows.1