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DM: TPM: tpm passthrough device must use fixed base GPA

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The TPM driver will access some mmio registers using absolute address,
That means TPM base GPA must use same HPA value, when passthough it to VM

Tracked-On: #6126
Signed-off-by: Tao Yuhong <yuhong.tao@intel.com>
This commit is contained in:
Tao Yuhong 2021-06-02 06:57:46 -04:00 committed by wenlingz
parent a420100704
commit a945846e7c
1 changed files with 15 additions and 4 deletions
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19
devicemodel/hw/mmio/core.c
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@ -73,7 +73,12 @@ int parse_pt_acpidev(char *opt)
/* TODO: support acpi dev framework, remove these TPM hard code */
if (strncmp(opt, "MSFT0101", 8) == 0) {
strncpy(mmio_devs[mmio_dev_idx].name, "MSFT0101", 8);
/* TODO: We would parse the /proc/iomem to get the corresponding resources */
mmio_devs[mmio_dev_idx].dev.base_hpa = 0xFED40000UL;
/* FIXME: The 0xFED40000 doesn't conflict with other mmio or system memory so far.
* This need to be fixed by redesign the mmio_dev_alloc_gpa_resource32().
*/
mmio_devs[mmio_dev_idx].dev.base_gpa = 0xFED40000UL;
mmio_devs[mmio_dev_idx].dev.size = 0x00005000UL;
mmio_dev_idx++;
pt_tpm2 = true;
@ -126,10 +131,16 @@ int init_mmio_dev(struct vmctx *ctx, struct mmio_dev_ops *ops, struct acrn_mmiod
int ret;
uint32_t base;
ret = mmio_dev_alloc_gpa_resource32(&base, mmiodev->size);
if (ret < 0)
return ret;
mmiodev->base_gpa = base;
if (mmiodev->base_gpa == 0UL) {
/* FIXME: The mmio_dev_alloc_gpa_resource32 needs to add one new parameter to indicate
* if the caller needs one specific GPA instead of dynamic allocation.
*/
ret = mmio_dev_alloc_gpa_resource32(&base, mmiodev->size);
if (ret < 0)
return ret;
mmiodev->base_gpa = base;
}
return ops->init(ctx, mmiodev);
}