Skip to content

Drivers: hv: mshv_vtl: TDX: Enable PARAVIRT CTLS for MCA and MTRR #105

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
wants to merge 1 commit into
base: product/hcl-main/6.12
Choose a base branch
from
+24 −0
Open

Drivers: hv: mshv_vtl: TDX: Enable PARAVIRT CTLS for MCA and MTRR #105

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
24 changes: 24 additions & 0 deletions drivers/hv/mshv_vtl_main.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -2754,6 +2754,21 @@ static int __init mshv_vtl_init_memory(void)

extern struct platform_driver mshv_vtl_sidecar;

static u64 tdg_vm_wr(u64 field, u64 value, u64 mask)
{
#if defined(CONFIG_X86_64) && defined(CONFIG_INTEL_TDX_GUEST)
struct tdx_module_args args = {
.rdx = field,
.r8 = value,
.r9 = mask,
};

return __tdcall(TDG_VM_WR, &args);
#else
return 0;
#endif
}

static int __init mshv_vtl_init(void)
{
int ret;
Expand All @@ -2778,6 +2793,15 @@ static int __init mshv_vtl_init(void)
if (ret)
goto unset_func;

if (hv_isolation_type_tdx())
#define TDX_TDCS_FEATURE_PARAVIRT_CTLS_FIELD_ID 0x9110000300000022ULL
#define TDX_PARAVIRT_MCA BIT_ULL(3)
#define TDX_PARAVIRT_MTRR BIT_ULL(4)
/* Ignore the result in case of VE_REDUCTION isn't supported. */
tdg_vm_wr(TDX_TDCS_FEATURE_PARAVIRT_CTLS_FIELD_ID,
TDX_PARAVIRT_MCA | TDX_PARAVIRT_MTRR,
TDX_PARAVIRT_MCA | TDX_PARAVIRT_MTRR);

ret = hv_vtl_setup_synic();
if (ret)
goto unset_func;
Expand Down