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hv: ivshmem: BAR0 size should be 256 Bytes

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ivshmem spec says that the size of BAR0 is 256 bytes. Windows
ivshmem driver will check the size of BAR0. It will refuse to
load the ivshmem driver if BAR0 size is not 256.
For post-launched VM hv land ivshmem BARs are allocated by
device model. For pre-launched VM hv land ivshmem BARs are
allocated by acrn-config tool. Both device model and acrn-config
tool should make sure that the BAR base addr are aligned to 4K
at least.

Tracked-On: #5717
Signed-off-by: Jian Jun Chen <jian.jun.chen@intel.com>
Reviewed-by: Fei Li <fei1.li@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Jian Jun Chen 2021-01-29 11:48:46 +08:00 committed by wenlingz
parent fad6a94030
commit aae7a89480
1 changed files with 2 additions and 2 deletions
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4
hypervisor/dm/vpci/ivshmem.c
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@ -26,7 +26,7 @@
#define IVSHMEM_MSIX_BAR 1U
#define IVSHMEM_SHM_BAR 2U
#define IVSHMEM_MMIO_BAR_SIZE 4096UL
#define IVSHMEM_MMIO_BAR_SIZE 256UL
/* The device-specific registers of ivshmem device */
#define IVSHMEM_IRQ_MASK_REG 0x0U
@ -261,7 +261,7 @@ static void ivshmem_vbar_map(struct pci_vdev *vdev, uint32_t idx)
(void)memset(&ivs_dev->mmio, 0U, sizeof(ivs_dev->mmio));
register_mmio_emulation_handler(vm, ivshmem_mmio_handler, vbar->base_gpa,
(vbar->base_gpa + vbar->size), vdev, false);
ept_del_mr(vm, (uint64_t *)vm->arch_vm.nworld_eptp, vbar->base_gpa, vbar->size);
ept_del_mr(vm, (uint64_t *)vm->arch_vm.nworld_eptp, vbar->base_gpa, round_page_up(vbar->size));
} else if ((idx == IVSHMEM_MSIX_BAR) && (vbar->base_gpa != 0UL)) {
register_mmio_emulation_handler(vm, vmsix_handle_table_mmio_access, vbar->base_gpa,
(vbar->base_gpa + vbar->size), vdev, false);