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* Wed Jan 04 2023 Miroslav Rezanina <mrezanin@redhat.com> - 7.2.0-3

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- kvm-hw-arm-virt-Introduce-virt_set_high_memmap-helper.patch [bz#2113840]
- kvm-hw-arm-virt-Rename-variable-size-to-region_size-in-v.patch [bz#2113840]
- kvm-hw-arm-virt-Introduce-variable-region_base-in-virt_s.patch [bz#2113840]
- kvm-hw-arm-virt-Introduce-virt_get_high_memmap_enabled-h.patch [bz#2113840]
- kvm-hw-arm-virt-Improve-high-memory-region-address-assig.patch [bz#2113840]
- kvm-hw-arm-virt-Add-compact-highmem-property.patch [bz#2113840]
- kvm-hw-arm-virt-Add-properties-to-disable-high-memory-re.patch [bz#2113840]
- kvm-hw-arm-virt-Enable-compat-high-memory-region-address.patch [bz#2113840]
- Resolves: bz#2113840
  ([RHEL9.2] Memory mapping optimization for virt machine)
This commit is contained in:
Miroslav Rezanina 2023-01-04 04:47:00 -05:00
parent 896f01d9a3
commit 5252804d55
9 changed files with 930 additions and 1 deletions
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169
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From 4ab2aff624908e49b099f00609875f4d03e9e1ec Mon Sep 17 00:00:00 2001
From: Gavin Shan <gshan@redhat.com>
Date: Wed, 21 Dec 2022 08:48:45 +0800
Subject: [PATCH 6/8] hw/arm/virt: Add 'compact-highmem' property
RH-Author: Gavin Shan <gshan@redhat.com>
RH-MergeRequest: 126: hw/arm/virt: Optimize high memory region address assignment
RH-Bugzilla: 2113840
RH-Acked-by: Eric Auger <eric.auger@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Commit: [6/8] 781506f3445493f05b511547370b6d88ef092457
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2113840
After the improvement to high memory region address assignment is
applied, the memory layout can be changed, introducing possible
migration breakage. For example, VIRT_HIGH_PCIE_MMIO memory region
is disabled or enabled when the optimization is applied or not, with
the following configuration. The configuration is only achievable by
modifying the source code until more properties are added to allow
users selectively disable those high memory regions.
pa_bits = 40;
vms->highmem_redists = false;
vms->highmem_ecam = false;
vms->highmem_mmio = true;
# qemu-system-aarch64 -accel kvm -cpu host \
-machine virt-7.2,compact-highmem={on, off} \
-m 4G,maxmem=511G -monitor stdio
Region compact-highmem=off compact-highmem=on
----------------------------------------------------------------
MEM [1GB 512GB] [1GB 512GB]
HIGH_GIC_REDISTS2 [512GB 512GB+64MB] [disabled]
HIGH_PCIE_ECAM [512GB+256MB 512GB+512MB] [disabled]
HIGH_PCIE_MMIO [disabled] [512GB 1TB]
In order to keep backwords compatibility, we need to disable the
optimization on machine, which is virt-7.1 or ealier than it. It
means the optimization is enabled by default from virt-7.2. Besides,
'compact-highmem' property is added so that the optimization can be
explicitly enabled or disabled on all machine types by users.
Signed-off-by: Gavin Shan <gshan@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Tested-by: Zhenyu Zhang <zhenyzha@redhat.com>
Message-id: 20221029224307.138822-7-gshan@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
(cherry picked from commit f40408a9fe5d1db70a75a33d2b26c8af8a5d57b0)
Signed-off-by: Gavin Shan <gshan@redhat.com>
Conflicts:
hw/arm/virt.c
Comment out the handlers of property 'compact-highmem' since
the property isn't exposed.
---
docs/system/arm/virt.rst | 4 ++++
hw/arm/virt.c | 34 ++++++++++++++++++++++++++++++++++
include/hw/arm/virt.h | 1 +
3 files changed, 39 insertions(+)
diff --git a/docs/system/arm/virt.rst b/docs/system/arm/virt.rst
index 20442ea2c1..4454706392 100644
--- a/docs/system/arm/virt.rst
+++ b/docs/system/arm/virt.rst
@@ -94,6 +94,10 @@ highmem
address space above 32 bits. The default is ``on`` for machine types
later than ``virt-2.12``.
+compact-highmem
+ Set ``on``/``off`` to enable/disable the compact layout for high memory regions.
+ The default is ``on`` for machine types later than ``virt-7.2``.
+
gic-version
Specify the version of the Generic Interrupt Controller (GIC) to provide.
Valid values are:
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 6896e0ca0f..6087511ae9 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -216,6 +216,12 @@ static const MemMapEntry base_memmap[] = {
* Note the extended_memmap is sized so that it eventually also includes the
* base_memmap entries (VIRT_HIGH_GIC_REDIST2 index is greater than the last
* index of base_memmap).
+ *
+ * The memory map for these Highmem IO Regions can be in legacy or compact
+ * layout, depending on 'compact-highmem' property. With legacy layout, the
+ * PA space for one specific region is always reserved, even if the region
+ * has been disabled or doesn't fit into the PA space. However, the PA space
+ * for the region won't be reserved in these circumstances with compact layout.
*/
static MemMapEntry extended_memmap[] = {
/* Additional 64 MB redist region (can contain up to 512 redistributors) */
@@ -2400,6 +2406,22 @@ static void virt_set_highmem(Object *obj, bool value, Error **errp)
vms->highmem = value;
}
+#if 0 /* Disabled for Red Hat Enterprise Linux */
+static bool virt_get_compact_highmem(Object *obj, Error **errp)
+{
+ VirtMachineState *vms = VIRT_MACHINE(obj);
+
+ return vms->highmem_compact;
+}
+
+static void virt_set_compact_highmem(Object *obj, bool value, Error **errp)
+{
+ VirtMachineState *vms = VIRT_MACHINE(obj);
+
+ vms->highmem_compact = value;
+}
+#endif /* disabled for RHEL */
+
static bool virt_get_its(Object *obj, Error **errp)
{
VirtMachineState *vms = VIRT_MACHINE(obj);
@@ -3023,6 +3045,13 @@ static void virt_machine_class_init(ObjectClass *oc, void *data)
"Set on/off to enable/disable using "
"physical address space above 32 bits");
+ object_class_property_add_bool(oc, "compact-highmem",
+ virt_get_compact_highmem,
+ virt_set_compact_highmem);
+ object_class_property_set_description(oc, "compact-highmem",
+ "Set on/off to enable/disable compact "
+ "layout for high memory regions");
+
object_class_property_add_str(oc, "gic-version", virt_get_gic_version,
virt_set_gic_version);
object_class_property_set_description(oc, "gic-version",
@@ -3107,6 +3136,7 @@ static void virt_instance_init(Object *obj)
/* High memory is enabled by default */
vms->highmem = true;
+ vms->highmem_compact = !vmc->no_highmem_compact;
vms->gic_version = VIRT_GIC_VERSION_NOSEL;
vms->highmem_ecam = !vmc->no_highmem_ecam;
@@ -3176,8 +3206,12 @@ DEFINE_VIRT_MACHINE_AS_LATEST(7, 2)
static void virt_machine_7_1_options(MachineClass *mc)
{
+ VirtMachineClass *vmc = VIRT_MACHINE_CLASS(OBJECT_CLASS(mc));
+
virt_machine_7_2_options(mc);
compat_props_add(mc->compat_props, hw_compat_7_1, hw_compat_7_1_len);
+ /* Compact layout for high memory regions was introduced with 7.2 */
+ vmc->no_highmem_compact = true;
}
DEFINE_VIRT_MACHINE(7, 1)
diff --git a/include/hw/arm/virt.h b/include/hw/arm/virt.h
index 15bd291311..85e7d61868 100644
--- a/include/hw/arm/virt.h
+++ b/include/hw/arm/virt.h
@@ -125,6 +125,7 @@ struct VirtMachineClass {
bool no_pmu;
bool claim_edge_triggered_timers;
bool smbios_old_sys_ver;
+ bool no_highmem_compact;
bool no_highmem_ecam;
bool no_ged; /* Machines < 4.2 have no support for ACPI GED device */
bool kvm_no_adjvtime;
--
2.31.1

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From 30e86a7c4fbcdc95b74bcb2a15745cb221783091 Mon Sep 17 00:00:00 2001
From: Gavin Shan <gshan@redhat.com>
Date: Wed, 21 Dec 2022 08:48:45 +0800
Subject: [PATCH 7/8] hw/arm/virt: Add properties to disable high memory
regions
RH-Author: Gavin Shan <gshan@redhat.com>
RH-MergeRequest: 126: hw/arm/virt: Optimize high memory region address assignment
RH-Bugzilla: 2113840
RH-Acked-by: Eric Auger <eric.auger@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Commit: [7/8] 16f8762393b447a590b31c9e4d8d3c58c6bc9fa8
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2113840
The 3 high memory regions are usually enabled by default, but they may
be not used. For example, VIRT_HIGH_GIC_REDIST2 isn't needed by GICv2.
This leads to waste in the PA space.
Add properties ("highmem-redists", "highmem-ecam", "highmem-mmio") to
allow users selectively disable them if needed. After that, the high
memory region for GICv3 or GICv4 redistributor can be disabled by user,
the number of maximal supported CPUs needs to be calculated based on
'vms->highmem_redists'. The follow-up error message is also improved
to indicate if the high memory region for GICv3 and GICv4 has been
enabled or not.
Suggested-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Gavin Shan <gshan@redhat.com>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Message-id: 20221029224307.138822-8-gshan@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
(cherry picked from commit 6a48c64eec355ab1aff694eb4522d07a8e461368)
Signed-off-by: Gavin Shan <gshan@redhat.com>
Conflicts:
hw/arm/virt.c
Comment out the handlers of the property 'highmem-redists',
'highmem-ecam' and 'highmem-mmio' since they aren't exposed.
---
docs/system/arm/virt.rst | 13 +++++++
hw/arm/virt.c | 75 ++++++++++++++++++++++++++++++++++++++--
2 files changed, 86 insertions(+), 2 deletions(-)
diff --git a/docs/system/arm/virt.rst b/docs/system/arm/virt.rst
index 4454706392..188a4f211f 100644
--- a/docs/system/arm/virt.rst
+++ b/docs/system/arm/virt.rst
@@ -98,6 +98,19 @@ compact-highmem
Set ``on``/``off`` to enable/disable the compact layout for high memory regions.
The default is ``on`` for machine types later than ``virt-7.2``.
+highmem-redists
+ Set ``on``/``off`` to enable/disable the high memory region for GICv3 or
+ GICv4 redistributor. The default is ``on``. Setting this to ``off`` will
+ limit the maximum number of CPUs when GICv3 or GICv4 is used.
+
+highmem-ecam
+ Set ``on``/``off`` to enable/disable the high memory region for PCI ECAM.
+ The default is ``on`` for machine types later than ``virt-3.0``.
+
+highmem-mmio
+ Set ``on``/``off`` to enable/disable the high memory region for PCI MMIO.
+ The default is ``on``.
+
gic-version
Specify the version of the Generic Interrupt Controller (GIC) to provide.
Valid values are:
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 6087511ae9..304fa0d6e7 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -2142,14 +2142,20 @@ static void machvirt_init(MachineState *machine)
if (vms->gic_version == VIRT_GIC_VERSION_2) {
virt_max_cpus = GIC_NCPU;
} else {
- virt_max_cpus = virt_redist_capacity(vms, VIRT_GIC_REDIST) +
- virt_redist_capacity(vms, VIRT_HIGH_GIC_REDIST2);
+ virt_max_cpus = virt_redist_capacity(vms, VIRT_GIC_REDIST);
+ if (vms->highmem_redists) {
+ virt_max_cpus += virt_redist_capacity(vms, VIRT_HIGH_GIC_REDIST2);
+ }
}
if (max_cpus > virt_max_cpus) {
error_report("Number of SMP CPUs requested (%d) exceeds max CPUs "
"supported by machine 'mach-virt' (%d)",
max_cpus, virt_max_cpus);
+ if (vms->gic_version != VIRT_GIC_VERSION_2 && !vms->highmem_redists) {
+ error_printf("Try 'highmem-redists=on' for more CPUs\n");
+ }
+
exit(1);
}
@@ -2420,6 +2426,49 @@ static void virt_set_compact_highmem(Object *obj, bool value, Error **errp)
vms->highmem_compact = value;
}
+
+static bool virt_get_highmem_redists(Object *obj, Error **errp)
+{
+ VirtMachineState *vms = VIRT_MACHINE(obj);
+
+ return vms->highmem_redists;
+}
+
+static void virt_set_highmem_redists(Object *obj, bool value, Error **errp)
+{
+ VirtMachineState *vms = VIRT_MACHINE(obj);
+
+ vms->highmem_redists = value;
+}
+
+static bool virt_get_highmem_ecam(Object *obj, Error **errp)
+{
+ VirtMachineState *vms = VIRT_MACHINE(obj);
+
+ return vms->highmem_ecam;
+}
+
+static void virt_set_highmem_ecam(Object *obj, bool value, Error **errp)
+{
+ VirtMachineState *vms = VIRT_MACHINE(obj);
+
+ vms->highmem_ecam = value;
+}
+
+static bool virt_get_highmem_mmio(Object *obj, Error **errp)
+{
+ VirtMachineState *vms = VIRT_MACHINE(obj);
+
+ return vms->highmem_mmio;
+}
+
+static void virt_set_highmem_mmio(Object *obj, bool value, Error **errp)
+{
+ VirtMachineState *vms = VIRT_MACHINE(obj);
+
+ vms->highmem_mmio = value;
+}
+
#endif /* disabled for RHEL */
static bool virt_get_its(Object *obj, Error **errp)
@@ -3052,6 +3101,28 @@ static void virt_machine_class_init(ObjectClass *oc, void *data)
"Set on/off to enable/disable compact "
"layout for high memory regions");
+ object_class_property_add_bool(oc, "highmem-redists",
+ virt_get_highmem_redists,
+ virt_set_highmem_redists);
+ object_class_property_set_description(oc, "highmem-redists",
+ "Set on/off to enable/disable high "
+ "memory region for GICv3 or GICv4 "
+ "redistributor");
+
+ object_class_property_add_bool(oc, "highmem-ecam",
+ virt_get_highmem_ecam,
+ virt_set_highmem_ecam);
+ object_class_property_set_description(oc, "highmem-ecam",
+ "Set on/off to enable/disable high "
+ "memory region for PCI ECAM");
+
+ object_class_property_add_bool(oc, "highmem-mmio",
+ virt_get_highmem_mmio,
+ virt_set_highmem_mmio);
+ object_class_property_set_description(oc, "highmem-mmio",
+ "Set on/off to enable/disable high "
+ "memory region for PCI MMIO");
+
object_class_property_add_str(oc, "gic-version", virt_get_gic_version,
virt_set_gic_version);
object_class_property_set_description(oc, "gic-version",
--
2.31.1

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From 969ea1ff46b52c5fe6d87f2eeb1625871a2dfb2a Mon Sep 17 00:00:00 2001
From: Gavin Shan <gshan@redhat.com>
Date: Wed, 21 Dec 2022 08:48:45 +0800
Subject: [PATCH 8/8] hw/arm/virt: Enable compat high memory region address
assignment for 9.2.0 machine
RH-Author: Gavin Shan <gshan@redhat.com>
RH-MergeRequest: 126: hw/arm/virt: Optimize high memory region address assignment
RH-Bugzilla: 2113840
RH-Acked-by: Eric Auger <eric.auger@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Commit: [8/8] beda1791c0c35dce5c669efd47685302b8468032
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2113840
Upstream: RHEL only
The compact high memory region address assignment is enabled for 9.2.0,
but it's kept as disabled for 9.0.0, to keep the backwards compatibility
on 9.0.0. Note that these newly added properties ('compact-highmem',
'highmem-redists', 'highmem-ecam', and 'highmem-mmio') in the upstream
aren't exposed for the downstream.
Signed-off-by: Gavin Shan <gshan@redhat.com>
---
hw/arm/virt.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 304fa0d6e7..e41c0b462c 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -3581,6 +3581,7 @@ static void rhel_virt_instance_init(Object *obj)
/* High memory is enabled by default */
vms->highmem = true;
+ vms->highmem_compact = !vmc->no_highmem_compact;
vms->gic_version = VIRT_GIC_VERSION_NOSEL;
vms->highmem_ecam = !vmc->no_highmem_ecam;
@@ -3659,5 +3660,7 @@ static void rhel900_virt_options(MachineClass *mc)
/* Disable FEAT_LPA2 since old kernels (<= v5.12) don't boot with that feature */
vmc->no_tcg_lpa2 = true;
+ /* Compact layout for high memory regions was introduced with 9.2.0 */
+ vmc->no_highmem_compact = true;
}
DEFINE_RHEL_MACHINE(9, 0, 0)
--
2.31.1

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From 1c7fad3776a14ca35b24dc2fdb262d4ddf40d6eb Mon Sep 17 00:00:00 2001
From: Gavin Shan <gshan@redhat.com>
Date: Wed, 21 Dec 2022 08:48:45 +0800
Subject: [PATCH 5/8] hw/arm/virt: Improve high memory region address
assignment
RH-Author: Gavin Shan <gshan@redhat.com>
RH-MergeRequest: 126: hw/arm/virt: Optimize high memory region address assignment
RH-Bugzilla: 2113840
RH-Acked-by: Eric Auger <eric.auger@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Commit: [5/8] 4d77fa78b5258a1bd8d30405cec5ba3311d42f92
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2113840
There are three high memory regions, which are VIRT_HIGH_REDIST2,
VIRT_HIGH_PCIE_ECAM and VIRT_HIGH_PCIE_MMIO. Their base addresses
are floating on highest RAM address. However, they can be disabled
in several cases.
(1) One specific high memory region is likely to be disabled by
code by toggling vms->highmem_{redists, ecam, mmio}.
(2) VIRT_HIGH_PCIE_ECAM region is disabled on machine, which is
'virt-2.12' or ealier than it.
(3) VIRT_HIGH_PCIE_ECAM region is disabled when firmware is loaded
on 32-bits system.
(4) One specific high memory region is disabled when it breaks the
PA space limit.
The current implementation of virt_set_{memmap, high_memmap}() isn't
optimized because the high memory region's PA space is always reserved,
regardless of whatever the actual state in the corresponding
vms->highmem_{redists, ecam, mmio} flag. In the code, 'base' and
'vms->highest_gpa' are always increased for case (1), (2) and (3).
It's unnecessary since the assigned PA space for the disabled high
memory region won't be used afterwards.
Improve the address assignment for those three high memory region by
skipping the address assignment for one specific high memory region if
it has been disabled in case (1), (2) and (3). The memory layout may
be changed after the improvement is applied, which leads to potential
migration breakage. So 'vms->highmem_compact' is added to control if
the improvement should be applied. For now, 'vms->highmem_compact' is
set to false, meaning that we don't have memory layout change until it
becomes configurable through property 'compact-highmem' in next patch.
Signed-off-by: Gavin Shan <gshan@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Tested-by: Zhenyu Zhang <zhenyzha@redhat.com>
Message-id: 20221029224307.138822-6-gshan@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
(cherry picked from commit 4a4ff9edc6a8fdc76082af5b41b059217138c09b)
Signed-off-by: Gavin Shan <gshan@redhat.com>
---
hw/arm/virt.c | 15 ++++++++++-----
include/hw/arm/virt.h | 1 +
2 files changed, 11 insertions(+), 5 deletions(-)
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 6e3b9fc060..6896e0ca0f 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -1768,18 +1768,23 @@ static void virt_set_high_memmap(VirtMachineState *vms,
vms->memmap[i].size = region_size;
/*
- * Check each device to see if they fit in the PA space,
- * moving highest_gpa as we go.
+ * Check each device to see if it fits in the PA space,
+ * moving highest_gpa as we go. For compatibility, move
+ * highest_gpa for disabled fitting devices as well, if
+ * the compact layout has been disabled.
*
* For each device that doesn't fit, disable it.
*/
fits = (region_base + region_size) <= BIT_ULL(pa_bits);
- if (fits) {
- vms->highest_gpa = region_base + region_size - 1;
+ *region_enabled &= fits;
+ if (vms->highmem_compact && !*region_enabled) {
+ continue;
}
- *region_enabled &= fits;
base = region_base + region_size;
+ if (fits) {
+ vms->highest_gpa = base - 1;
+ }
}
}
diff --git a/include/hw/arm/virt.h b/include/hw/arm/virt.h
index 22b54ec510..15bd291311 100644
--- a/include/hw/arm/virt.h
+++ b/include/hw/arm/virt.h
@@ -144,6 +144,7 @@ struct VirtMachineState {
PFlashCFI01 *flash[2];
bool secure;
bool highmem;
+ bool highmem_compact;
bool highmem_ecam;
bool highmem_mmio;
bool highmem_redists;
--
2.31.1

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@ -0,0 +1,82 @@
From 305a369fd18f29914bf96cc181add532d435d8ed Mon Sep 17 00:00:00 2001
From: Gavin Shan <gshan@redhat.com>
Date: Wed, 21 Dec 2022 08:48:45 +0800
Subject: [PATCH 3/8] hw/arm/virt: Introduce variable region_base in
virt_set_high_memmap()
RH-Author: Gavin Shan <gshan@redhat.com>
RH-MergeRequest: 126: hw/arm/virt: Optimize high memory region address assignment
RH-Bugzilla: 2113840
RH-Acked-by: Eric Auger <eric.auger@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Commit: [3/8] 15de90df217d680ccc858b679898b3993e1c050a
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2113840
This introduces variable 'region_base' for the base address of the
specific high memory region. It's the preparatory work to optimize
high memory region address assignment.
No functional change intended.
Signed-off-by: Gavin Shan <gshan@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Tested-by: Zhenyu Zhang <zhenyzha@redhat.com>
Message-id: 20221029224307.138822-4-gshan@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
(cherry picked from commit fa245799b9407fc7b561da185b3d889df5e16a88)
Signed-off-by: Gavin Shan <gshan@redhat.com>
---
hw/arm/virt.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index ca098d40b8..ddcf7ee2f8 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -1739,15 +1739,15 @@ static uint64_t virt_cpu_mp_affinity(VirtMachineState *vms, int idx)
static void virt_set_high_memmap(VirtMachineState *vms,
hwaddr base, int pa_bits)
{
- hwaddr region_size;
+ hwaddr region_base, region_size;
bool fits;
int i;
for (i = VIRT_LOWMEMMAP_LAST; i < ARRAY_SIZE(extended_memmap); i++) {
+ region_base = ROUND_UP(base, extended_memmap[i].size);
region_size = extended_memmap[i].size;
- base = ROUND_UP(base, region_size);
- vms->memmap[i].base = base;
+ vms->memmap[i].base = region_base;
vms->memmap[i].size = region_size;
/*
@@ -1756,9 +1756,9 @@ static void virt_set_high_memmap(VirtMachineState *vms,
*
* For each device that doesn't fit, disable it.
*/
- fits = (base + region_size) <= BIT_ULL(pa_bits);
+ fits = (region_base + region_size) <= BIT_ULL(pa_bits);
if (fits) {
- vms->highest_gpa = base + region_size - 1;
+ vms->highest_gpa = region_base + region_size - 1;
}
switch (i) {
@@ -1773,7 +1773,7 @@ static void virt_set_high_memmap(VirtMachineState *vms,
break;
}
- base += region_size;
+ base = region_base + region_size;
}
}
--
2.31.1

95
kvm-hw-arm-virt-Introduce-virt_get_high_memmap_enabled-h.patch Normal file
View File

@ -0,0 +1,95 @@
From a2ddd68c8365ec602db6b2a9cf83bb441ca701cc Mon Sep 17 00:00:00 2001
From: Gavin Shan <gshan@redhat.com>
Date: Wed, 21 Dec 2022 08:48:45 +0800
Subject: [PATCH 4/8] hw/arm/virt: Introduce virt_get_high_memmap_enabled()
helper
RH-Author: Gavin Shan <gshan@redhat.com>
RH-MergeRequest: 126: hw/arm/virt: Optimize high memory region address assignment
RH-Bugzilla: 2113840
RH-Acked-by: Eric Auger <eric.auger@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Commit: [4/8] 65524de2fc106600bbaff641caa8c4f2f8027114
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2113840
This introduces virt_get_high_memmap_enabled() helper, which returns
the pointer to vms->highmem_{redists, ecam, mmio}. The pointer will
be used in the subsequent patches.
No functional change intended.
Signed-off-by: Gavin Shan <gshan@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Tested-by: Zhenyu Zhang <zhenyzha@redhat.com>
Message-id: 20221029224307.138822-5-gshan@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
(cherry picked from commit a5cb1350b19a5c2a58ab4edddf609ed429c13085)
Signed-off-by: Gavin Shan <gshan@redhat.com>
---
hw/arm/virt.c | 32 +++++++++++++++++++-------------
1 file changed, 19 insertions(+), 13 deletions(-)
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index ddcf7ee2f8..6e3b9fc060 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -1736,14 +1736,31 @@ static uint64_t virt_cpu_mp_affinity(VirtMachineState *vms, int idx)
return arm_cpu_mp_affinity(idx, clustersz);
}
+static inline bool *virt_get_high_memmap_enabled(VirtMachineState *vms,
+ int index)
+{
+ bool *enabled_array[] = {
+ &vms->highmem_redists,
+ &vms->highmem_ecam,
+ &vms->highmem_mmio,
+ };
+
+ assert(ARRAY_SIZE(extended_memmap) - VIRT_LOWMEMMAP_LAST ==
+ ARRAY_SIZE(enabled_array));
+ assert(index - VIRT_LOWMEMMAP_LAST < ARRAY_SIZE(enabled_array));
+
+ return enabled_array[index - VIRT_LOWMEMMAP_LAST];
+}
+
static void virt_set_high_memmap(VirtMachineState *vms,
hwaddr base, int pa_bits)
{
hwaddr region_base, region_size;
- bool fits;
+ bool *region_enabled, fits;
int i;
for (i = VIRT_LOWMEMMAP_LAST; i < ARRAY_SIZE(extended_memmap); i++) {
+ region_enabled = virt_get_high_memmap_enabled(vms, i);
region_base = ROUND_UP(base, extended_memmap[i].size);
region_size = extended_memmap[i].size;
@@ -1761,18 +1778,7 @@ static void virt_set_high_memmap(VirtMachineState *vms,
vms->highest_gpa = region_base + region_size - 1;
}
- switch (i) {
- case VIRT_HIGH_GIC_REDIST2:
- vms->highmem_redists &= fits;
- break;
- case VIRT_HIGH_PCIE_ECAM:
- vms->highmem_ecam &= fits;
- break;
- case VIRT_HIGH_PCIE_MMIO:
- vms->highmem_mmio &= fits;
- break;
- }
-
+ *region_enabled &= fits;
base = region_base + region_size;
}
}
--
2.31.1

130
kvm-hw-arm-virt-Introduce-virt_set_high_memmap-helper.patch Normal file
View File

@ -0,0 +1,130 @@
From 5dff87c5ea60054709021025c9513ec259433ce2 Mon Sep 17 00:00:00 2001
From: Gavin Shan <gshan@redhat.com>
Date: Wed, 21 Dec 2022 08:48:45 +0800
Subject: [PATCH 1/8] hw/arm/virt: Introduce virt_set_high_memmap() helper
RH-Author: Gavin Shan <gshan@redhat.com>
RH-MergeRequest: 126: hw/arm/virt: Optimize high memory region address assignment
RH-Bugzilla: 2113840
RH-Acked-by: Eric Auger <eric.auger@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Commit: [1/8] 5f6ba5af7a2c21d8473c58e088ee99b11336c673
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2113840
This introduces virt_set_high_memmap() helper. The logic of high
memory region address assignment is moved to the helper. The intention
is to make the subsequent optimization for high memory region address
assignment easier.
No functional change intended.
Signed-off-by: Gavin Shan <gshan@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Tested-by: Zhenyu Zhang <zhenyzha@redhat.com>
Message-id: 20221029224307.138822-2-gshan@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
(cherry picked from commit 4af6b6edece5ef273d29972d53547f823d2bc1c0)
Signed-off-by: Gavin Shan <gshan@redhat.com>
---
hw/arm/virt.c | 74 ++++++++++++++++++++++++++++-----------------------
1 file changed, 41 insertions(+), 33 deletions(-)
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index bf18838b87..bea5f54720 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -1736,6 +1736,46 @@ static uint64_t virt_cpu_mp_affinity(VirtMachineState *vms, int idx)
return arm_cpu_mp_affinity(idx, clustersz);
}
+static void virt_set_high_memmap(VirtMachineState *vms,
+ hwaddr base, int pa_bits)
+{
+ int i;
+
+ for (i = VIRT_LOWMEMMAP_LAST; i < ARRAY_SIZE(extended_memmap); i++) {
+ hwaddr size = extended_memmap[i].size;
+ bool fits;
+
+ base = ROUND_UP(base, size);
+ vms->memmap[i].base = base;
+ vms->memmap[i].size = size;
+
+ /*
+ * Check each device to see if they fit in the PA space,
+ * moving highest_gpa as we go.
+ *
+ * For each device that doesn't fit, disable it.
+ */
+ fits = (base + size) <= BIT_ULL(pa_bits);
+ if (fits) {
+ vms->highest_gpa = base + size - 1;
+ }
+
+ switch (i) {
+ case VIRT_HIGH_GIC_REDIST2:
+ vms->highmem_redists &= fits;
+ break;
+ case VIRT_HIGH_PCIE_ECAM:
+ vms->highmem_ecam &= fits;
+ break;
+ case VIRT_HIGH_PCIE_MMIO:
+ vms->highmem_mmio &= fits;
+ break;
+ }
+
+ base += size;
+ }
+}
+
static void virt_set_memmap(VirtMachineState *vms, int pa_bits)
{
MachineState *ms = MACHINE(vms);
@@ -1791,39 +1831,7 @@ static void virt_set_memmap(VirtMachineState *vms, int pa_bits)
/* We know for sure that at least the memory fits in the PA space */
vms->highest_gpa = memtop - 1;
- for (i = VIRT_LOWMEMMAP_LAST; i < ARRAY_SIZE(extended_memmap); i++) {
- hwaddr size = extended_memmap[i].size;
- bool fits;
-
- base = ROUND_UP(base, size);
- vms->memmap[i].base = base;
- vms->memmap[i].size = size;
-
- /*
- * Check each device to see if they fit in the PA space,
- * moving highest_gpa as we go.
- *
- * For each device that doesn't fit, disable it.
- */
- fits = (base + size) <= BIT_ULL(pa_bits);
- if (fits) {
- vms->highest_gpa = base + size - 1;
- }
-
- switch (i) {
- case VIRT_HIGH_GIC_REDIST2:
- vms->highmem_redists &= fits;
- break;
- case VIRT_HIGH_PCIE_ECAM:
- vms->highmem_ecam &= fits;
- break;
- case VIRT_HIGH_PCIE_MMIO:
- vms->highmem_mmio &= fits;
- break;
- }
-
- base += size;
- }
+ virt_set_high_memmap(vms, base, pa_bits);
if (device_memory_size > 0) {
ms->device_memory = g_malloc0(sizeof(*ms->device_memory));
--
2.31.1

83
kvm-hw-arm-virt-Rename-variable-size-to-region_size-in-v.patch Normal file
View File

@ -0,0 +1,83 @@
From bd5b7edbf8f4425f4b4e0d49a00cbdd48d9c6f48 Mon Sep 17 00:00:00 2001
From: Gavin Shan <gshan@redhat.com>
Date: Wed, 21 Dec 2022 08:48:45 +0800
Subject: [PATCH 2/8] hw/arm/virt: Rename variable size to region_size in
virt_set_high_memmap()
RH-Author: Gavin Shan <gshan@redhat.com>
RH-MergeRequest: 126: hw/arm/virt: Optimize high memory region address assignment
RH-Bugzilla: 2113840
RH-Acked-by: Eric Auger <eric.auger@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Commit: [2/8] 1cadf1b00686cceb45821a58fdcb509bc5da335d
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2113840
This renames variable 'size' to 'region_size' in virt_set_high_memmap().
Its counterpart ('region_base') will be introduced in next patch.
No functional change intended.
Signed-off-by: Gavin Shan <gshan@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Tested-by: Zhenyu Zhang <zhenyzha@redhat.com>
Message-id: 20221029224307.138822-3-gshan@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
(cherry picked from commit 370bea9d1c78796eec235ed6cb4310f489931a62)
Signed-off-by: Gavin Shan <gshan@redhat.com>
---
hw/arm/virt.c | 15 ++++++++-------
1 file changed, 8 insertions(+), 7 deletions(-)
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index bea5f54720..ca098d40b8 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -1739,15 +1739,16 @@ static uint64_t virt_cpu_mp_affinity(VirtMachineState *vms, int idx)
static void virt_set_high_memmap(VirtMachineState *vms,
hwaddr base, int pa_bits)
{
+ hwaddr region_size;
+ bool fits;
int i;
for (i = VIRT_LOWMEMMAP_LAST; i < ARRAY_SIZE(extended_memmap); i++) {
- hwaddr size = extended_memmap[i].size;
- bool fits;
+ region_size = extended_memmap[i].size;
- base = ROUND_UP(base, size);
+ base = ROUND_UP(base, region_size);
vms->memmap[i].base = base;
- vms->memmap[i].size = size;
+ vms->memmap[i].size = region_size;
/*
* Check each device to see if they fit in the PA space,
@@ -1755,9 +1756,9 @@ static void virt_set_high_memmap(VirtMachineState *vms,
*
* For each device that doesn't fit, disable it.
*/
- fits = (base + size) <= BIT_ULL(pa_bits);
+ fits = (base + region_size) <= BIT_ULL(pa_bits);
if (fits) {
- vms->highest_gpa = base + size - 1;
+ vms->highest_gpa = base + region_size - 1;
}
switch (i) {
@@ -1772,7 +1773,7 @@ static void virt_set_high_memmap(VirtMachineState *vms,
break;
}
- base += size;
+ base += region_size;
}
}
--
2.31.1

30
qemu-kvm.spec
View File

@ -148,7 +148,7 @@ Obsoletes: %{name}-block-ssh <= %{epoch}:%{version} \
Summary: QEMU is a machine emulator and virtualizer
Name: qemu-kvm
Version: 7.2.0
Release: 2%{?rcrel}%{?dist}%{?cc_suffix}
Release: 3%{?rcrel}%{?dist}%{?cc_suffix}
# Epoch because we pushed a qemu-1.0 package. AIUI this can't ever be dropped
# Epoch 15 used for RHEL 8
# Epoch 17 used for RHEL 9 (due to release versioning offset in RHEL 8.5)
@ -192,6 +192,22 @@ Patch0020: 0020-redhat-aarch64-add-rhel9.2.0-virt-machine-type.patch
Patch0021: 0021-redhat-Add-new-rhel-9.2.0-s390x-machine-type.patch
Patch0022: 0022-x86-rhel-9.2.0-machine-type.patch
Patch23: kvm-redhat-fix-virt-rhel9.2.0-compat-props.patch
# For bz#2113840 - [RHEL9.2] Memory mapping optimization for virt machine
Patch24: kvm-hw-arm-virt-Introduce-virt_set_high_memmap-helper.patch
# For bz#2113840 - [RHEL9.2] Memory mapping optimization for virt machine
Patch25: kvm-hw-arm-virt-Rename-variable-size-to-region_size-in-v.patch
# For bz#2113840 - [RHEL9.2] Memory mapping optimization for virt machine
Patch26: kvm-hw-arm-virt-Introduce-variable-region_base-in-virt_s.patch
# For bz#2113840 - [RHEL9.2] Memory mapping optimization for virt machine
Patch27: kvm-hw-arm-virt-Introduce-virt_get_high_memmap_enabled-h.patch
# For bz#2113840 - [RHEL9.2] Memory mapping optimization for virt machine
Patch28: kvm-hw-arm-virt-Improve-high-memory-region-address-assig.patch
# For bz#2113840 - [RHEL9.2] Memory mapping optimization for virt machine
Patch29: kvm-hw-arm-virt-Add-compact-highmem-property.patch
# For bz#2113840 - [RHEL9.2] Memory mapping optimization for virt machine
Patch30: kvm-hw-arm-virt-Add-properties-to-disable-high-memory-re.patch
# For bz#2113840 - [RHEL9.2] Memory mapping optimization for virt machine
Patch31: kvm-hw-arm-virt-Enable-compat-high-memory-region-address.patch
%if %{have_clang}
BuildRequires: clang
@ -1220,6 +1236,18 @@ useradd -r -u 107 -g qemu -G kvm -d / -s /sbin/nologin \
%endif
%changelog
* Wed Jan 04 2023 Miroslav Rezanina <mrezanin@redhat.com> - 7.2.0-3
- kvm-hw-arm-virt-Introduce-virt_set_high_memmap-helper.patch [bz#2113840]
- kvm-hw-arm-virt-Rename-variable-size-to-region_size-in-v.patch [bz#2113840]
- kvm-hw-arm-virt-Introduce-variable-region_base-in-virt_s.patch [bz#2113840]
- kvm-hw-arm-virt-Introduce-virt_get_high_memmap_enabled-h.patch [bz#2113840]
- kvm-hw-arm-virt-Improve-high-memory-region-address-assig.patch [bz#2113840]
- kvm-hw-arm-virt-Add-compact-highmem-property.patch [bz#2113840]
- kvm-hw-arm-virt-Add-properties-to-disable-high-memory-re.patch [bz#2113840]
- kvm-hw-arm-virt-Enable-compat-high-memory-region-address.patch [bz#2113840]
- Resolves: bz#2113840
([RHEL9.2] Memory mapping optimization for virt machine)
* Tue Dec 20 2022 Miroslav Rezanina <mrezanin@redhat.com> - 7.2.0-2
- Fix updating from 7.1.0
- kvm-redhat-fix-virt-rhel9.2.0-compat-props.patch[bz#2154640]