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From: "Philippe Mathieu-Daudé" <philmd@redhat.com>
To: qemu-devel@nongnu.org
Cc: "Dmitry Fleytman" <dmitry.fleytman@gmail.com>,
	qemu-trivial@nongnu.org, "Jason Wang" <jasowang@redhat.com>,
	"Christian Schoenebeck" <qemu_oss@crudebyte.com>,
	"Greg Kurz" <groug@kaod.org>,
	"Paolo Bonzini" <pbonzini@redhat.com>,
	"Philippe Mathieu-Daudé" <philmd@redhat.com>
Subject: [PATCH 2/3] hw/net/e1000: Move macreg[] arrays to .rodata to save 1MiB of .data
Date: Thu,  5 Mar 2020 02:04:45 +0100	[thread overview]
Message-ID: <20200305010446.17029-3-philmd@redhat.com> (raw)
In-Reply-To: <20200305010446.17029-1-philmd@redhat.com>

Each array consumes 256KiB of .data. As we do not reassign entries,
we can move it to the .rodata section, and save a total of 1MiB of
.data (size reported on x86_64 host).

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
 hw/net/e1000.c       | 4 ++--
 hw/net/e1000e_core.c | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/hw/net/e1000.c b/hw/net/e1000.c
index 972d9b5083..9233248c9a 100644
--- a/hw/net/e1000.c
+++ b/hw/net/e1000.c
@@ -1151,7 +1151,7 @@ set_ims(E1000State *s, int index, uint32_t val)
 
 #define getreg(x)    [x] = mac_readreg
 typedef uint32_t (*readops)(E1000State *, int);
-static readops macreg_readops[] = {
+static const readops macreg_readops[] = {
     getreg(PBA),      getreg(RCTL),     getreg(TDH),      getreg(TXDCTL),
     getreg(WUFC),     getreg(TDT),      getreg(CTRL),     getreg(LEDCTL),
     getreg(MANC),     getreg(MDIC),     getreg(SWSM),     getreg(STATUS),
@@ -1207,7 +1207,7 @@ enum { NREADOPS = ARRAY_SIZE(macreg_readops) };
 
 #define putreg(x)    [x] = mac_writereg
 typedef void (*writeops)(E1000State *, int, uint32_t);
-static writeops macreg_writeops[] = {
+static const writeops macreg_writeops[] = {
     putreg(PBA),      putreg(EERD),     putreg(SWSM),     putreg(WUFC),
     putreg(TDBAL),    putreg(TDBAH),    putreg(TXDCTL),   putreg(RDBAH),
     putreg(RDBAL),    putreg(LEDCTL),   putreg(VET),      putreg(FCRUC),
diff --git a/hw/net/e1000e_core.c b/hw/net/e1000e_core.c
index 38bdb90114..df957e0c1a 100644
--- a/hw/net/e1000e_core.c
+++ b/hw/net/e1000e_core.c
@@ -2856,7 +2856,7 @@ e1000e_set_gcr(E1000ECore *core, int index, uint32_t val)
 
 #define e1000e_getreg(x)    [x] = e1000e_mac_readreg
 typedef uint32_t (*readops)(E1000ECore *, int);
-static readops e1000e_macreg_readops[] = {
+static const readops e1000e_macreg_readops[] = {
     e1000e_getreg(PBA),
     e1000e_getreg(WUFC),
     e1000e_getreg(MANC),
@@ -3063,7 +3063,7 @@ enum { E1000E_NREADOPS = ARRAY_SIZE(e1000e_macreg_readops) };
 
 #define e1000e_putreg(x)    [x] = e1000e_mac_writereg
 typedef void (*writeops)(E1000ECore *, int, uint32_t);
-static writeops e1000e_macreg_writeops[] = {
+static const writeops e1000e_macreg_writeops[] = {
     e1000e_putreg(PBA),
     e1000e_putreg(SWSM),
     e1000e_putreg(WUFC),
-- 
2.21.1



  parent reply	other threads:[~2020-03-05  1:07 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-05  1:04 [PATCH 0/3] hw/net,virtfs-proxy-helper: Reduce .data footprint Philippe Mathieu-Daudé
2020-03-05  1:04 ` [PATCH 1/3] hw/net/e1000: Add readops/writeops typedefs Philippe Mathieu-Daudé
2020-03-05  9:16   ` Dmitry Fleytman
2020-03-05  1:04 ` Philippe Mathieu-Daudé [this message]
2020-03-05  9:16   ` [PATCH 2/3] hw/net/e1000: Move macreg[] arrays to .rodata to save 1MiB of .data Dmitry Fleytman
2020-03-05  1:04 ` [PATCH 3/3] virtfs-proxy-helper: Make the helper_opts[] array const Philippe Mathieu-Daudé
2020-03-05 10:10   ` Greg Kurz
2020-03-05  9:53 ` [PATCH 0/3] hw/net,virtfs-proxy-helper: Reduce .data footprint Stefano Garzarella
2020-03-05 10:37   ` Philippe Mathieu-Daudé
2020-03-05 10:41     ` Stefano Garzarella
2020-03-06  9:25 ` Paolo Bonzini
2020-03-09 11:44   ` Laurent Vivier

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