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hv: vpci: remove pci_msi_cap in pci_pdev

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The MSI Message Address and Message Data have no valid data after Power-ON. So
there's no need to initialize them by reading the data from physical PCI configuration
space.

Tracked-On: #3475
Signed-off-by: Li, Fei1 <fei1.li@intel.com>
This commit is contained in:
Li, Fei1
2019-10-12 17:46:21 +08:00
committed by wenlingz
parent b1e43b4454
commit 0dac373d93
3 changed files with 6 additions and 40 deletions
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26
hypervisor/dm/vpci/vmsi.c
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@@ -153,21 +153,6 @@ void deinit_vmsi(const struct pci_vdev *vdev)
}
}
/* Read a uint32_t from buffer (little endian) */
static uint32_t buf_read32(const uint8_t buf[])
{
return buf[0] | ((uint32_t)buf[1] << 8U) | ((uint32_t)buf[2] << 16U) | ((uint32_t)buf[3] << 24U);
}
/* Write a uint32_t to buffer (little endian) */
static void buf_write32(uint8_t buf[], uint32_t val)
{
buf[0] = (uint8_t)(val & 0xFFU);
buf[1] = (uint8_t)((val >> 8U) & 0xFFU);
buf[2] = (uint8_t)((val >> 16U) & 0xFFU);
buf[3] = (uint8_t)((val >> 24U) & 0xFFU);
}
/**
* @pre vdev != NULL
* @pre vdev->pdev != NULL
@@ -177,18 +162,15 @@ void init_vmsi(struct pci_vdev *vdev)
struct pci_pdev *pdev = vdev->pdev;
uint32_t val;
vdev->msi.capoff = pdev->msi.capoff;
vdev->msi.caplen = pdev->msi.caplen;
vdev->msi.capoff = pdev->msi_capoff;
if (has_msi_cap(vdev)) {
(void)memcpy_s((void *)&vdev->cfgdata.data_8[pdev->msi.capoff], pdev->msi.caplen,
(void *)&pdev->msi.cap[0U], pdev->msi.caplen);
val = pci_pdev_read_cfg(pdev->bdf, vdev->msi.capoff, 4U);
vdev->msi.caplen = ((val & (PCIM_MSICTRL_64BIT << 16U)) != 0U) ? 14U : 10U;
val = buf_read32(&pdev->msi.cap[0U]);
val &= ~((uint32_t)PCIM_MSICTRL_MMC_MASK << 16U);
val &= ~((uint32_t)PCIM_MSICTRL_MME_MASK << 16U);
buf_write32(&vdev->cfgdata.data_8[pdev->msi.capoff], val);
pci_vdev_write_cfg(vdev, vdev->msi.capoff, 4U, val);
}
}