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pcie: Support PCIe Gen5/Gen6 link speeds

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This patch extends the PCIe link speed option so that slots can be
configured as supporting 32GT/s (Gen5) or 64GT/s (Gen5) speeds.
This is as simple as setting the appropriate bit in LnkCap2 and
the appropriate value in LnkCap and LnkCtl2.

Signed-off-by: Lukas Stockner <lstockner@genesiscloud.com>
Message-Id: <20240215012326.3272366-1-lstockner@genesiscloud.com>
Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Lukas Stockner 2024-02-15 02:23:26 +01:00 • committed by Michael S. Tsirkin
parent 52767e1063
commit c08da86dc4
4 changed files with 29 additions and 3 deletions
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16
hw/core/qdev-properties-system.c
View file

@ -955,7 +955,7 @@ const PropertyInfo qdev_prop_off_auto_pcibar = {
.set_default_value = qdev_propinfo_set_default_value_enum,
};
/* --- PCIELinkSpeed 2_5/5/8/16 -- */
/* --- PCIELinkSpeed 2_5/5/8/16/32/64 -- */
static void get_prop_pcielinkspeed(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
@ -977,6 +977,12 @@ static void get_prop_pcielinkspeed(Object *obj, Visitor *v, const char *name,
case QEMU_PCI_EXP_LNK_16GT:
speed = PCIE_LINK_SPEED_16;
break;
case QEMU_PCI_EXP_LNK_32GT:
speed = PCIE_LINK_SPEED_32;
break;
case QEMU_PCI_EXP_LNK_64GT:
speed = PCIE_LINK_SPEED_64;
break;
default:
/* Unreachable */
abort();
@ -1010,6 +1016,12 @@ static void set_prop_pcielinkspeed(Object *obj, Visitor *v, const char *name,
case PCIE_LINK_SPEED_16:
*p = QEMU_PCI_EXP_LNK_16GT;
break;
case PCIE_LINK_SPEED_32:
*p = QEMU_PCI_EXP_LNK_32GT;
break;
case PCIE_LINK_SPEED_64:
*p = QEMU_PCI_EXP_LNK_64GT;
break;
default:
/* Unreachable */
abort();
@ -1018,7 +1030,7 @@ static void set_prop_pcielinkspeed(Object *obj, Visitor *v, const char *name,
const PropertyInfo qdev_prop_pcie_link_speed = {
.name = "PCIELinkSpeed",
.description = "2_5/5/8/16",
.description = "2_5/5/8/16/32/64",
.enum_table = &PCIELinkSpeed_lookup,
.get = get_prop_pcielinkspeed,
.set = set_prop_pcielinkspeed,