fridtjof/qemu-cr16
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

i386/tdx: Introduce is_tdx_vm() helper and cache tdx_guest object

Browse source 
It will need special handling for TDX VMs all around the QEMU.
Introduce is_tdx_vm() helper to query if it's a TDX VM.

Cache tdx_guest object thus no need to cast from ms->cgs every time.

Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Isaku Yamahata <isaku.yamahata@intel.com>
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Link: https://lore.kernel.org/r/20250508150002.689633-7-xiaoyao.li@intel.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Xiaoyao Li 2025-05-08 10:59:12 -04:00 • committed by Paolo Bonzini
parent 8eddedc370
commit 1619d0e45b
2 changed files with 24 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

15
target/i386/kvm/tdx.c
View file

@ -18,8 +18,16 @@
#include "kvm_i386.h"
#include "tdx.h"
static TdxGuest *tdx_guest;
static struct kvm_tdx_capabilities *tdx_caps;
/* Valid after kvm_arch_init()->confidential_guest_kvm_init()->tdx_kvm_init() */
bool is_tdx_vm(void)
{
return !!tdx_guest;
}
enum tdx_ioctl_level {
TDX_VM_IOCTL,
TDX_VCPU_IOCTL,
@ -117,15 +125,20 @@ static int get_tdx_capabilities(Error **errp)
static int tdx_kvm_init(ConfidentialGuestSupport *cgs, Error **errp)
{
TdxGuest *tdx = TDX_GUEST(cgs);
int r = 0;
kvm_mark_guest_state_protected();
if (!tdx_caps) {
r = get_tdx_capabilities(errp);
if (r) {
return r;
}
}
return r;
tdx_guest = tdx;
return 0;
}
static int tdx_kvm_type(X86ConfidentialGuest *cg)

10
target/i386/kvm/tdx.h
View file

@ -3,6 +3,10 @@
#ifndef QEMU_I386_TDX_H
#define QEMU_I386_TDX_H
#ifndef CONFIG_USER_ONLY
#include CONFIG_DEVICES /* CONFIG_TDX */
#endif
#include "confidential-guest.h"
#define TYPE_TDX_GUEST "tdx-guest"
@ -18,4 +22,10 @@ typedef struct TdxGuest {
uint64_t attributes; /* TD attributes */
} TdxGuest;
#ifdef CONFIG_TDX
bool is_tdx_vm(void);
#else
#define is_tdx_vm() 0
#endif /* CONFIG_TDX */
#endif /* QEMU_I386_TDX_H */