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Merge tag 'hyperv-next-signed-20230424' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux

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Pull hyperv updates from Wei Liu:

 - PCI passthrough for Hyper-V confidential VMs (Michael Kelley)

 - Hyper-V VTL mode support (Saurabh Sengar)

 - Move panic report initialization code earlier (Long Li)

 - Various improvements and bug fixes (Dexuan Cui and Michael Kelley)

* tag 'hyperv-next-signed-20230424' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux: (22 commits)
  PCI: hv: Replace retarget_msi_interrupt_params with hyperv_pcpu_input_arg
  Drivers: hv: move panic report code from vmbus to hv early init code
  x86/hyperv: VTL support for Hyper-V
  Drivers: hv: Kconfig: Add HYPERV_VTL_MODE
  x86/hyperv: Make hv_get_nmi_reason public
  x86/hyperv: Add VTL specific structs and hypercalls
  x86/init: Make get/set_rtc_noop() public
  x86/hyperv: Exclude lazy TLB mode CPUs from enlightened TLB flushes
  x86/hyperv: Add callback filter to cpumask_to_vpset()
  Drivers: hv: vmbus: Remove the per-CPU post_msg_page
  clocksource: hyper-v: make sure Invariant-TSC is used if it is available
  PCI: hv: Enable PCI pass-thru devices in Confidential VMs
  Drivers: hv: Don't remap addresses that are above shared_gpa_boundary
  hv_netvsc: Remove second mapping of send and recv buffers
  Drivers: hv: vmbus: Remove second way of mapping ring buffers
  Drivers: hv: vmbus: Remove second mapping of VMBus monitor pages
  swiotlb: Remove bounce buffer remapping for Hyper-V
  Driver: VMBus: Add Devicetree support
  dt-bindings: bus: Add Hyper-V VMBus
  Drivers: hv: vmbus: Convert acpi_device to more generic platform_device
  ...
This commit is contained in:
Linus Torvalds
2023-04-27 17:17:12 -07:00
parent 8ccd54fe45 a494aef23d
commit da46b58ff8
30 changed files with 1065 additions and 687 deletions
Download Patch File Download Diff File Expand all files Collapse all files

45
kernel/dma/swiotlb.c
View File

@@ -73,8 +73,6 @@ static bool swiotlb_force_disable;
struct io_tlb_mem io_tlb_default_mem;
phys_addr_t swiotlb_unencrypted_base;
static unsigned long default_nslabs = IO_TLB_DEFAULT_SIZE >> IO_TLB_SHIFT;
static unsigned long default_nareas;
@@ -201,34 +199,6 @@ static inline unsigned long nr_slots(u64 val)
return DIV_ROUND_UP(val, IO_TLB_SIZE);
}
/*
* Remap swioltb memory in the unencrypted physical address space
* when swiotlb_unencrypted_base is set. (e.g. for Hyper-V AMD SEV-SNP
* Isolation VMs).
*/
#ifdef CONFIG_HAS_IOMEM
static void *swiotlb_mem_remap(struct io_tlb_mem *mem, unsigned long bytes)
{
void *vaddr = NULL;
if (swiotlb_unencrypted_base) {
phys_addr_t paddr = mem->start + swiotlb_unencrypted_base;
vaddr = memremap(paddr, bytes, MEMREMAP_WB);
if (!vaddr)
pr_err("Failed to map the unencrypted memory %pa size %lx.\n",
&paddr, bytes);
}
return vaddr;
}
#else
static void *swiotlb_mem_remap(struct io_tlb_mem *mem, unsigned long bytes)
{
return NULL;
}
#endif
/*
* Early SWIOTLB allocation may be too early to allow an architecture to
* perform the desired operations. This function allows the architecture to
@@ -238,18 +208,12 @@ static void *swiotlb_mem_remap(struct io_tlb_mem *mem, unsigned long bytes)
void __init swiotlb_update_mem_attributes(void)
{
struct io_tlb_mem *mem = &io_tlb_default_mem;
void *vaddr;
unsigned long bytes;
if (!mem->nslabs || mem->late_alloc)
return;
vaddr = phys_to_virt(mem->start);
bytes = PAGE_ALIGN(mem->nslabs << IO_TLB_SHIFT);
set_memory_decrypted((unsigned long)vaddr, bytes >> PAGE_SHIFT);
mem->vaddr = swiotlb_mem_remap(mem, bytes);
if (!mem->vaddr)
mem->vaddr = vaddr;
set_memory_decrypted((unsigned long)mem->vaddr, bytes >> PAGE_SHIFT);
}
static void swiotlb_init_io_tlb_mem(struct io_tlb_mem *mem, phys_addr_t start,
@@ -280,13 +244,6 @@ static void swiotlb_init_io_tlb_mem(struct io_tlb_mem *mem, phys_addr_t start,
mem->slots[i].alloc_size = 0;
}
/*
* If swiotlb_unencrypted_base is set, the bounce buffer memory will
* be remapped and cleared in swiotlb_update_mem_attributes.
*/
if (swiotlb_unencrypted_base)
return;
memset(vaddr, 0, bytes);
mem->vaddr = vaddr;
return;