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dm: deal with physical GSI sharing

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- hardcode the devices' GSI info based on the platform
- reject the passthrough if the following requirement is not met
  all the PCI devices that are sharing the same GSI should be assigned
  to same VM to avoid physical GSI sharing between multiple VMs.

v4 -> v5
 * Move the gsi_dev_mapping_tables definition in a separate file
 * Add the GSI info that might be used by GPIO
 * Update the HW name

v3 - > v4
 * Refine the format of raw data to improve the readability
 * Remove the redundant code when adding the new dev into the gsi
    sharing group

v2 -> v3
 * Add the MSI/MSI-x capability check
   Do not add the device which supports MSI/MSI-x to the GSI sharing
   group.

v1 -> v2
 * Update the GSI raw data based on SBL
 * Free the resources when gsi sharing violation occurs
 * Move the MACRO PCI_BDF(b, d, f) to pci_core.h since passthrough.c
    and gsi_sharing.c are both using it

Signed-off-by: Shiqing Gao <shiqing.gao@intel.com>
Reviewed-by: Edwin Zhai <edwin.zhai@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Shiqing Gao
2018-06-15 09:08:47 +08:00
committed by Xie, nanlin
parent 9600dfa07d
commit 789899d05f
6 changed files with 395 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
devicemodel/include/pci_core.h
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@@ -36,6 +36,7 @@
#include "pcireg.h"
#define PCI_BARMAX PCIR_MAX_BAR_0 /* BAR registers in a Type 0 header */
#define PCI_BDF(b, d, f) (((b & 0xFF) << 8) | ((d & 0x1F) << 3) | ((f & 0x7)))
struct vmctx;
struct pci_vdev;
@@ -161,6 +162,20 @@ struct pci_vdev {
struct pcibar bar[PCI_BARMAX + 1];
};
struct gsi_dev {
/*
* For PCI devices, use a string "b:d.f" to stand for the device's BDF,
* such as "00:00.0".
* For non-PCI devices, use the device's name to stand for the device,
* such as "timer".
*/
char *dev_name;
uint8_t gsi;
};
extern struct gsi_dev gsi_dev_mapping_tables[];
extern int num_gsi_dev_mapping_tables;
struct msicap {
uint8_t capid;
uint8_t nextptr;
@@ -260,6 +275,11 @@ uint64_t pci_ecfg_base(void);
int pci_bus_configured(int bus);
int emulate_pci_cfgrw(struct vmctx *ctx, int vcpu, int in, int bus,
int slot, int func, int reg, int bytes, int *value);
int create_gsi_sharing_groups(void);
void update_pt_info(uint16_t phys_bdf);
int check_gsi_sharing_violation(void);
int pciaccess_init(void);
void pciaccess_cleanup(void);
static inline void
pci_set_cfgdata8(struct pci_vdev *pi, int offset, uint8_t val)