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q35: increase default tseg size

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With virtual machines becoming larger (more CPUs, more memory) the
memory needed by the SMM code in OVMF to manage page tables and vcpu
state grows too.

Default SMM memory (aka TSEG) size is 16 MB, and this often is not
enough.  Bump it to 64 MB for new machine types.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <20251106105640.1642109-1-kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2025-11-06 11:56:40 +01:00 • committed by Michael S. Tsirkin
parent 1c79ab6937
commit fa41363879
2 changed files with 4 additions and 2 deletions
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4
hw/i386/pc.c
View file

@ -81,7 +81,9 @@
{ "qemu64-" TYPE_X86_CPU, "model-id", "QEMU Virtual CPU version " v, },\
{ "athlon-" TYPE_X86_CPU, "model-id", "QEMU Virtual CPU version " v, },
GlobalProperty pc_compat_10_1[] = {};
GlobalProperty pc_compat_10_1[] = {
{ "mch", "extended-tseg-mbytes", "16" },
};
const size_t pc_compat_10_1_len = G_N_ELEMENTS(pc_compat_10_1);
GlobalProperty pc_compat_10_0[] = {

2
hw/pci-host/q35.c
View file

@ -663,7 +663,7 @@ static void mch_realize(PCIDevice *d, Error **errp)
static const Property mch_props[] = {
DEFINE_PROP_UINT16("extended-tseg-mbytes", MCHPCIState, ext_tseg_mbytes,
16),
64),
DEFINE_PROP_BOOL("smbase-smram", MCHPCIState, has_smram_at_smbase, true),
};