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target/i386: add guest-phys-bits cpu property

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Allows to set guest-phys-bits (cpuid leaf 80000008, eax[23:16])
via -cpu $model,guest-phys-bits=$nr.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-ID: <20240318155336.156197-3-kraxel@redhat.com>
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Gerd Hoffmann 2024-03-18 16:53:36 +01:00 • committed by Paolo Bonzini
parent 85fa9acda8
commit 513ba32dcc
3 changed files with 33 additions and 1 deletions
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8
target/i386/cpu.h
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@ -2027,6 +2027,14 @@ struct ArchCPU {
/* Number of physical address bits supported */
uint32_t phys_bits;
/*
* Number of guest physical address bits available. Usually this is
* identical to host physical address bits. With NPT or EPT 4-level
* paging, guest physical address space might be restricted to 48 bits
* even if the host cpu supports more physical address bits.
*/
uint32_t guest_phys_bits;
/* in order to simplify APIC support, we leave this pointer to the
user */
struct DeviceState *apic_state;