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| author | Corvin Köhne <corvink@FreeBSD.org> | 2023-05-11 09:18:56 +0000 |
|---|---|---|
| committer | Corvin Köhne <corvink@FreeBSD.org> | 2023-08-18 07:32:07 +0000 |
| commit | 6d037b69ee623ffee05864d6f01712c875409be0 (patch) | |
| tree | c04c3afabcd8678e102378565b45e8e454e61650 | |
| parent | aa598e677a7c3e6cf8e8524e9e8015df9c28a9f9 (diff) | |
| download | src-6d037b69ee623ffee05864d6f01712c875409be0.tar.gz src-6d037b69ee623ffee05864d6f01712c875409be0.zip | |
bhyve: emulate graphics stolen memory register
This register contains a host physical address. This address is
meaningless for the guest. We have to emulate it and set it to a valid
guest physical address.
Reviewed by: markj
MFC after: 1 week
Sponsored by: Beckhoff Automation GmbH & Co. KG
Differential Revision: https://reviews.freebsd.org/D40060
(cherry picked from commit d9fa7c113df254b237e5a573d0567eb686e5fcde)
| -rw-r--r-- | usr.sbin/bhyve/pci_gvt-d.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/usr.sbin/bhyve/pci_gvt-d.c b/usr.sbin/bhyve/pci_gvt-d.c index 9c5b0906ec29..3109bc06be82 100644 --- a/usr.sbin/bhyve/pci_gvt-d.c +++ b/usr.sbin/bhyve/pci_gvt-d.c @@ -23,6 +23,8 @@ #define PCI_VENDOR_INTEL 0x8086 +#define PCIR_BDSM 0x5C /* Base of Data Stolen Memory register */ + #define PCIM_BDSM_GSM_ALIGNMENT \ 0x00100000 /* Graphics Stolen Memory is 1 MB aligned */ @@ -96,6 +98,7 @@ gvt_d_setup_gsm(struct pci_devinst *const pi) struct passthru_softc *sc; struct passthru_mmio_mapping *gsm; size_t sysctl_len; + uint32_t bdsm; int error; sc = pi->pi_arg; @@ -156,7 +159,12 @@ gvt_d_setup_gsm(struct pci_devinst *const pi) "Warning: Unable to reuse host address of Graphics Stolen Memory. GPU passthrough might not work properly."); } - return (0); + bdsm = read_config(passthru_get_sel(sc), PCIR_BDSM, 4); + pci_set_cfgdata32(pi, PCIR_BDSM, + gsm->gpa | (bdsm & (PCIM_BDSM_GSM_ALIGNMENT - 1))); + + return (set_pcir_handler(sc, PCIR_BDSM, 4, passthru_cfgread_emulate, + passthru_cfgwrite_emulate)); } static int |