- Add the necessary glue so that the kernel can run as a confidential
SEV-SNP vTOM guest on Hyper-V. A vTOM guest basically splits the address space in two parts: encrypted and unencrypted. The use case being running unmodified guests on the Hyper-V confidential computing hypervisor - Double-buffer messages between the guest and the hardware PSP device so that no partial buffers are copied back'n'forth and thus potential message integrity and leak attacks are possible - Name the return value the sev-guest driver returns when the hw PSP device hasn't been called, explicitly - Cleanups -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEzv7L6UO9uDPlPSfHEsHwGGHeVUoFAmRGl8gACgkQEsHwGGHe VUoEDhAAiw4+2nZR7XUJ7pewlXG7AJJZsVIpzzcF6Gyymn0LFCyMnP7O3snmFqzz aik0q2LzWrmDQ3Nmmzul0wtdsuW7Nik6BP9oF3WnB911+gGbpXyNWZ8EhOPNzkUR 9D8Sp6f0xmqNE3YuzEpanufiDswgUxi++DRdmIRAs1TTh4bfUFWZcib1pdwoqSmR oS3UfVwVZ4Ee2Qm1f3n3XQ0FUpsjWeARPExUkLEvd8XeonTP+6aGAdggg9MnPcsl 3zpSmOpuZ6VQbDrHxo3BH9HFuIUOd6S9PO++b9F6WxNPGEMk7fHa7ahOA6HjhgVz 5Da3BN16OS9j64cZsYHMPsBcd+ja1YmvvZGypsY0d6X4d3M1zTPW+XeLbyb+VFBy SvA7z+JuxtLKVpju65sNiJWw8ZDTSu+eEYNDeeGLvAj3bxtclJjcPdMEPdzxmC5K eAhmRmiFuVM4nXMAR6cspVTsxvlTHFtd5gdm6RlRnvd7aV77Zl1CLzTy8IHTVpvI t7XTbtjEjYc0pI6cXXptHEOnBLjXUMPcqgGFgJYEauH6EvrxoWszUZD0tS3Hw80A K+Rwnc70ubq/PsgZcF4Ayer1j49z1NPfk5D4EA7/ChN6iNhQA8OqHT1UBrHAgqls 2UAwzE2sQZnjDvGZghlOtFIQUIhwue7m93DaRi19EOdKYxVjV6U= =ZAw9 -----END PGP SIGNATURE----- Merge tag 'x86_sev_for_v6.4_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 SEV updates from Borislav Petkov: - Add the necessary glue so that the kernel can run as a confidential SEV-SNP vTOM guest on Hyper-V. A vTOM guest basically splits the address space in two parts: encrypted and unencrypted. The use case being running unmodified guests on the Hyper-V confidential computing hypervisor - Double-buffer messages between the guest and the hardware PSP device so that no partial buffers are copied back'n'forth and thus potential message integrity and leak attacks are possible - Name the return value the sev-guest driver returns when the hw PSP device hasn't been called, explicitly - Cleanups * tag 'x86_sev_for_v6.4_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/hyperv: Change vTOM handling to use standard coco mechanisms init: Call mem_encrypt_init() after Hyper-V hypercall init is done x86/mm: Handle decryption/re-encryption of bss_decrypted consistently Drivers: hv: Explicitly request decrypted in vmap_pfn() calls x86/hyperv: Reorder code to facilitate future work x86/ioremap: Add hypervisor callback for private MMIO mapping in coco VM x86/sev: Change snp_guest_issue_request()'s fw_err argument virt/coco/sev-guest: Double-buffer messages crypto: ccp: Get rid of __sev_platform_init_locked()'s local function pointer crypto: ccp - Name -1 return value as SEV_RET_NO_FW_CALL
This commit is contained in:
Linus Torvalds
commit
bc1bb2a49b
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|
@ -37,11 +37,11 @@ along with a description:
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the return value. General error numbers (-ENOMEM, -EINVAL)
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are not detailed, but errors with specific meanings are.
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The guest ioctl should be issued on a file descriptor of the /dev/sev-guest device.
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The ioctl accepts struct snp_user_guest_request. The input and output structure is
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specified through the req_data and resp_data field respectively. If the ioctl fails
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to execute due to a firmware error, then fw_err code will be set otherwise the
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fw_err will be set to 0x00000000000000ff.
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The guest ioctl should be issued on a file descriptor of the /dev/sev-guest
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device. The ioctl accepts struct snp_user_guest_request. The input and
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output structure is specified through the req_data and resp_data field
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respectively. If the ioctl fails to execute due to a firmware error, then
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the fw_error code will be set, otherwise fw_error will be set to -1.
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The firmware checks that the message sequence counter is one greater than
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the guests message sequence counter. If guest driver fails to increment message
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@ -57,8 +57,14 @@ counter (e.g. counter overflow), then -EIO will be returned.
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__u64 req_data;
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__u64 resp_data;
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/* firmware error code on failure (see psp-sev.h) */
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__u64 fw_err;
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/* bits[63:32]: VMM error code, bits[31:0] firmware error code (see psp-sev.h) */
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union {
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__u64 exitinfo2;
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struct {
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__u32 fw_error;
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__u32 vmm_error;
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};
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};
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};
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2.1 SNP_GET_REPORT
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|
|
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@ -29,6 +29,22 @@ static bool intel_cc_platform_has(enum cc_attr attr)
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}
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}
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/*
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* Handle the SEV-SNP vTOM case where sme_me_mask is zero, and
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* the other levels of SME/SEV functionality, including C-bit
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* based SEV-SNP, are not enabled.
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*/
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static __maybe_unused bool amd_cc_platform_vtom(enum cc_attr attr)
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{
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switch (attr) {
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case CC_ATTR_GUEST_MEM_ENCRYPT:
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case CC_ATTR_MEM_ENCRYPT:
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return true;
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default:
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return false;
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}
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}
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/*
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* SME and SEV are very similar but they are not the same, so there are
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* times that the kernel will need to distinguish between SME and SEV. The
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|
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@ -41,9 +57,14 @@ static bool intel_cc_platform_has(enum cc_attr attr)
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* up under SME the trampoline area cannot be encrypted, whereas under SEV
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* the trampoline area must be encrypted.
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*/
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static bool amd_cc_platform_has(enum cc_attr attr)
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{
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#ifdef CONFIG_AMD_MEM_ENCRYPT
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if (sev_status & MSR_AMD64_SNP_VTOM)
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return amd_cc_platform_vtom(attr);
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switch (attr) {
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case CC_ATTR_MEM_ENCRYPT:
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return sme_me_mask;
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@ -76,11 +97,6 @@ static bool amd_cc_platform_has(enum cc_attr attr)
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#endif
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}
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static bool hyperv_cc_platform_has(enum cc_attr attr)
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{
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return attr == CC_ATTR_GUEST_MEM_ENCRYPT;
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}
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bool cc_platform_has(enum cc_attr attr)
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{
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switch (vendor) {
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@ -88,8 +104,6 @@ bool cc_platform_has(enum cc_attr attr)
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return amd_cc_platform_has(attr);
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case CC_VENDOR_INTEL:
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return intel_cc_platform_has(attr);
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case CC_VENDOR_HYPERV:
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return hyperv_cc_platform_has(attr);
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default:
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return false;
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}
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@ -103,11 +117,14 @@ u64 cc_mkenc(u64 val)
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* encryption status of the page.
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*
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* - for AMD, bit *set* means the page is encrypted
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* - for Intel *clear* means encrypted.
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* - for AMD with vTOM and for Intel, *clear* means encrypted
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*/
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switch (vendor) {
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case CC_VENDOR_AMD:
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return val | cc_mask;
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if (sev_status & MSR_AMD64_SNP_VTOM)
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return val & ~cc_mask;
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else
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return val | cc_mask;
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case CC_VENDOR_INTEL:
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return val & ~cc_mask;
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default:
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|
|
@ -120,7 +137,10 @@ u64 cc_mkdec(u64 val)
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/* See comment in cc_mkenc() */
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switch (vendor) {
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case CC_VENDOR_AMD:
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return val & ~cc_mask;
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if (sev_status & MSR_AMD64_SNP_VTOM)
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return val | cc_mask;
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else
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return val & ~cc_mask;
|
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case CC_VENDOR_INTEL:
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return val | cc_mask;
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default:
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|
|
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|
|
@ -29,7 +29,6 @@
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|||
#include <linux/syscore_ops.h>
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#include <clocksource/hyperv_timer.h>
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#include <linux/highmem.h>
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#include <linux/swiotlb.h>
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int hyperv_init_cpuhp;
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u64 hv_current_partition_id = ~0ull;
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|
|
@ -504,16 +503,6 @@ void __init hyperv_init(void)
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/* Query the VMs extended capability once, so that it can be cached. */
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hv_query_ext_cap(0);
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|
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#ifdef CONFIG_SWIOTLB
|
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/*
|
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* Swiotlb bounce buffer needs to be mapped in extra address
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* space. Map function doesn't work in the early place and so
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* call swiotlb_update_mem_attributes() here.
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*/
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if (hv_is_isolation_supported())
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swiotlb_update_mem_attributes();
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#endif
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return;
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|
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clean_guest_os_id:
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|
|
|
|||
|
|
@ -13,6 +13,8 @@
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#include <asm/svm.h>
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#include <asm/sev.h>
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#include <asm/io.h>
|
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#include <asm/coco.h>
|
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#include <asm/mem_encrypt.h>
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#include <asm/mshyperv.h>
|
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#include <asm/hypervisor.h>
|
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|
||||
|
|
@ -233,41 +235,6 @@ void hv_ghcb_msr_read(u64 msr, u64 *value)
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local_irq_restore(flags);
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}
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||||
EXPORT_SYMBOL_GPL(hv_ghcb_msr_read);
|
||||
#endif
|
||||
|
||||
enum hv_isolation_type hv_get_isolation_type(void)
|
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{
|
||||
if (!(ms_hyperv.priv_high & HV_ISOLATION))
|
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return HV_ISOLATION_TYPE_NONE;
|
||||
return FIELD_GET(HV_ISOLATION_TYPE, ms_hyperv.isolation_config_b);
|
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}
|
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EXPORT_SYMBOL_GPL(hv_get_isolation_type);
|
||||
|
||||
/*
|
||||
* hv_is_isolation_supported - Check system runs in the Hyper-V
|
||||
* isolation VM.
|
||||
*/
|
||||
bool hv_is_isolation_supported(void)
|
||||
{
|
||||
if (!cpu_feature_enabled(X86_FEATURE_HYPERVISOR))
|
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return false;
|
||||
|
||||
if (!hypervisor_is_type(X86_HYPER_MS_HYPERV))
|
||||
return false;
|
||||
|
||||
return hv_get_isolation_type() != HV_ISOLATION_TYPE_NONE;
|
||||
}
|
||||
|
||||
DEFINE_STATIC_KEY_FALSE(isolation_type_snp);
|
||||
|
||||
/*
|
||||
* hv_isolation_type_snp - Check system runs in the AMD SEV-SNP based
|
||||
* isolation VM.
|
||||
*/
|
||||
bool hv_isolation_type_snp(void)
|
||||
{
|
||||
return static_branch_unlikely(&isolation_type_snp);
|
||||
}
|
||||
|
||||
/*
|
||||
* hv_mark_gpa_visibility - Set pages visible to host via hvcall.
|
||||
|
|
@ -320,27 +287,25 @@ static int hv_mark_gpa_visibility(u16 count, const u64 pfn[],
|
|||
}
|
||||
|
||||
/*
|
||||
* hv_set_mem_host_visibility - Set specified memory visible to host.
|
||||
* hv_vtom_set_host_visibility - Set specified memory visible to host.
|
||||
*
|
||||
* In Isolation VM, all guest memory is encrypted from host and guest
|
||||
* needs to set memory visible to host via hvcall before sharing memory
|
||||
* with host. This function works as wrap of hv_mark_gpa_visibility()
|
||||
* with memory base and size.
|
||||
*/
|
||||
int hv_set_mem_host_visibility(unsigned long kbuffer, int pagecount, bool visible)
|
||||
static bool hv_vtom_set_host_visibility(unsigned long kbuffer, int pagecount, bool enc)
|
||||
{
|
||||
enum hv_mem_host_visibility visibility = visible ?
|
||||
VMBUS_PAGE_VISIBLE_READ_WRITE : VMBUS_PAGE_NOT_VISIBLE;
|
||||
enum hv_mem_host_visibility visibility = enc ?
|
||||
VMBUS_PAGE_NOT_VISIBLE : VMBUS_PAGE_VISIBLE_READ_WRITE;
|
||||
u64 *pfn_array;
|
||||
int ret = 0;
|
||||
bool result = true;
|
||||
int i, pfn;
|
||||
|
||||
if (!hv_is_isolation_supported() || !hv_hypercall_pg)
|
||||
return 0;
|
||||
|
||||
pfn_array = kmalloc(HV_HYP_PAGE_SIZE, GFP_KERNEL);
|
||||
if (!pfn_array)
|
||||
return -ENOMEM;
|
||||
return false;
|
||||
|
||||
for (i = 0, pfn = 0; i < pagecount; i++) {
|
||||
pfn_array[pfn] = virt_to_hvpfn((void *)kbuffer + i * HV_HYP_PAGE_SIZE);
|
||||
|
|
@ -349,17 +314,68 @@ int hv_set_mem_host_visibility(unsigned long kbuffer, int pagecount, bool visibl
|
|||
if (pfn == HV_MAX_MODIFY_GPA_REP_COUNT || i == pagecount - 1) {
|
||||
ret = hv_mark_gpa_visibility(pfn, pfn_array,
|
||||
visibility);
|
||||
if (ret)
|
||||
if (ret) {
|
||||
result = false;
|
||||
goto err_free_pfn_array;
|
||||
}
|
||||
pfn = 0;
|
||||
}
|
||||
}
|
||||
|
||||
err_free_pfn_array:
|
||||
kfree(pfn_array);
|
||||
return ret;
|
||||
return result;
|
||||
}
|
||||
|
||||
static bool hv_vtom_tlb_flush_required(bool private)
|
||||
{
|
||||
return true;
|
||||
}
|
||||
|
||||
static bool hv_vtom_cache_flush_required(void)
|
||||
{
|
||||
return false;
|
||||
}
|
||||
|
||||
static bool hv_is_private_mmio(u64 addr)
|
||||
{
|
||||
/*
|
||||
* Hyper-V always provides a single IO-APIC in a guest VM.
|
||||
* When a paravisor is used, it is emulated by the paravisor
|
||||
* in the guest context and must be mapped private.
|
||||
*/
|
||||
if (addr >= HV_IOAPIC_BASE_ADDRESS &&
|
||||
addr < (HV_IOAPIC_BASE_ADDRESS + PAGE_SIZE))
|
||||
return true;
|
||||
|
||||
/* Same with a vTPM */
|
||||
if (addr >= VTPM_BASE_ADDRESS &&
|
||||
addr < (VTPM_BASE_ADDRESS + PAGE_SIZE))
|
||||
return true;
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
void __init hv_vtom_init(void)
|
||||
{
|
||||
/*
|
||||
* By design, a VM using vTOM doesn't see the SEV setting,
|
||||
* so SEV initialization is bypassed and sev_status isn't set.
|
||||
* Set it here to indicate a vTOM VM.
|
||||
*/
|
||||
sev_status = MSR_AMD64_SNP_VTOM;
|
||||
cc_set_vendor(CC_VENDOR_AMD);
|
||||
cc_set_mask(ms_hyperv.shared_gpa_boundary);
|
||||
physical_mask &= ms_hyperv.shared_gpa_boundary - 1;
|
||||
|
||||
x86_platform.hyper.is_private_mmio = hv_is_private_mmio;
|
||||
x86_platform.guest.enc_cache_flush_required = hv_vtom_cache_flush_required;
|
||||
x86_platform.guest.enc_tlb_flush_required = hv_vtom_tlb_flush_required;
|
||||
x86_platform.guest.enc_status_change_finish = hv_vtom_set_host_visibility;
|
||||
}
|
||||
|
||||
#endif /* CONFIG_AMD_MEM_ENCRYPT */
|
||||
|
||||
/*
|
||||
* hv_map_memory - map memory to extra space in the AMD SEV-SNP Isolation VM.
|
||||
*/
|
||||
|
|
@ -377,7 +393,7 @@ void *hv_map_memory(void *addr, unsigned long size)
|
|||
pfns[i] = vmalloc_to_pfn(addr + i * PAGE_SIZE) +
|
||||
(ms_hyperv.shared_gpa_boundary >> PAGE_SHIFT);
|
||||
|
||||
vaddr = vmap_pfn(pfns, size / PAGE_SIZE, PAGE_KERNEL_IO);
|
||||
vaddr = vmap_pfn(pfns, size / PAGE_SIZE, pgprot_decrypted(PAGE_KERNEL));
|
||||
kfree(pfns);
|
||||
|
||||
return vaddr;
|
||||
|
|
@ -387,3 +403,37 @@ void hv_unmap_memory(void *addr)
|
|||
{
|
||||
vunmap(addr);
|
||||
}
|
||||
|
||||
enum hv_isolation_type hv_get_isolation_type(void)
|
||||
{
|
||||
if (!(ms_hyperv.priv_high & HV_ISOLATION))
|
||||
return HV_ISOLATION_TYPE_NONE;
|
||||
return FIELD_GET(HV_ISOLATION_TYPE, ms_hyperv.isolation_config_b);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(hv_get_isolation_type);
|
||||
|
||||
/*
|
||||
* hv_is_isolation_supported - Check system runs in the Hyper-V
|
||||
* isolation VM.
|
||||
*/
|
||||
bool hv_is_isolation_supported(void)
|
||||
{
|
||||
if (!cpu_feature_enabled(X86_FEATURE_HYPERVISOR))
|
||||
return false;
|
||||
|
||||
if (!hypervisor_is_type(X86_HYPER_MS_HYPERV))
|
||||
return false;
|
||||
|
||||
return hv_get_isolation_type() != HV_ISOLATION_TYPE_NONE;
|
||||
}
|
||||
|
||||
DEFINE_STATIC_KEY_FALSE(isolation_type_snp);
|
||||
|
||||
/*
|
||||
* hv_isolation_type_snp - Check system runs in the AMD SEV-SNP based
|
||||
* isolation VM.
|
||||
*/
|
||||
bool hv_isolation_type_snp(void)
|
||||
{
|
||||
return static_branch_unlikely(&isolation_type_snp);
|
||||
}
|
||||
|
|
|
|||
|
|
@ -7,7 +7,6 @@
|
|||
enum cc_vendor {
|
||||
CC_VENDOR_NONE,
|
||||
CC_VENDOR_AMD,
|
||||
CC_VENDOR_HYPERV,
|
||||
CC_VENDOR_INTEL,
|
||||
};
|
||||
|
||||
|
|
|
|||
|
|
@ -56,6 +56,7 @@ void __init sev_es_init_vc_handling(void);
|
|||
#else /* !CONFIG_AMD_MEM_ENCRYPT */
|
||||
|
||||
#define sme_me_mask 0ULL
|
||||
#define sev_status 0ULL
|
||||
|
||||
static inline void __init sme_early_encrypt(resource_size_t paddr,
|
||||
unsigned long size) { }
|
||||
|
|
|
|||
|
|
@ -11,6 +11,14 @@
|
|||
#include <asm/paravirt.h>
|
||||
#include <asm/mshyperv.h>
|
||||
|
||||
/*
|
||||
* Hyper-V always provides a single IO-APIC at this MMIO address.
|
||||
* Ideally, the value should be looked up in ACPI tables, but it
|
||||
* is needed for mapping the IO-APIC early in boot on Confidential
|
||||
* VMs, before ACPI functions can be used.
|
||||
*/
|
||||
#define HV_IOAPIC_BASE_ADDRESS 0xfec00000
|
||||
|
||||
union hv_ghcb;
|
||||
|
||||
DECLARE_STATIC_KEY_FALSE(isolation_type_snp);
|
||||
|
|
@ -206,18 +214,19 @@ struct irq_domain *hv_create_pci_msi_domain(void);
|
|||
int hv_map_ioapic_interrupt(int ioapic_id, bool level, int vcpu, int vector,
|
||||
struct hv_interrupt_entry *entry);
|
||||
int hv_unmap_ioapic_interrupt(int ioapic_id, struct hv_interrupt_entry *entry);
|
||||
int hv_set_mem_host_visibility(unsigned long addr, int numpages, bool visible);
|
||||
|
||||
#ifdef CONFIG_AMD_MEM_ENCRYPT
|
||||
void hv_ghcb_msr_write(u64 msr, u64 value);
|
||||
void hv_ghcb_msr_read(u64 msr, u64 *value);
|
||||
bool hv_ghcb_negotiate_protocol(void);
|
||||
void hv_ghcb_terminate(unsigned int set, unsigned int reason);
|
||||
void hv_vtom_init(void);
|
||||
#else
|
||||
static inline void hv_ghcb_msr_write(u64 msr, u64 value) {}
|
||||
static inline void hv_ghcb_msr_read(u64 msr, u64 *value) {}
|
||||
static inline bool hv_ghcb_negotiate_protocol(void) { return false; }
|
||||
static inline void hv_ghcb_terminate(unsigned int set, unsigned int reason) {}
|
||||
static inline void hv_vtom_init(void) {}
|
||||
#endif
|
||||
|
||||
extern bool hv_isolation_type_snp(void);
|
||||
|
|
@ -259,11 +268,6 @@ static inline void hv_set_register(unsigned int reg, u64 value) { }
|
|||
static inline u64 hv_get_register(unsigned int reg) { return 0; }
|
||||
static inline void hv_set_non_nested_register(unsigned int reg, u64 value) { }
|
||||
static inline u64 hv_get_non_nested_register(unsigned int reg) { return 0; }
|
||||
static inline int hv_set_mem_host_visibility(unsigned long addr, int numpages,
|
||||
bool visible)
|
||||
{
|
||||
return -1;
|
||||
}
|
||||
#endif /* CONFIG_HYPERV */
|
||||
|
||||
|
||||
|
|
|
|||
|
|
@ -128,10 +128,6 @@ struct snp_psc_desc {
|
|||
struct psc_entry entries[VMGEXIT_PSC_MAX_ENTRY];
|
||||
} __packed;
|
||||
|
||||
/* Guest message request error codes */
|
||||
#define SNP_GUEST_REQ_INVALID_LEN BIT_ULL(32)
|
||||
#define SNP_GUEST_REQ_ERR_BUSY BIT_ULL(33)
|
||||
|
||||
#define GHCB_MSR_TERM_REQ 0x100
|
||||
#define GHCB_MSR_TERM_REASON_SET_POS 12
|
||||
#define GHCB_MSR_TERM_REASON_SET_MASK 0xf
|
||||
|
|
|
|||
|
|
@ -9,6 +9,8 @@
|
|||
#define __ASM_ENCRYPTED_STATE_H
|
||||
|
||||
#include <linux/types.h>
|
||||
#include <linux/sev-guest.h>
|
||||
|
||||
#include <asm/insn.h>
|
||||
#include <asm/sev-common.h>
|
||||
#include <asm/bootparam.h>
|
||||
|
|
@ -185,6 +187,9 @@ static inline int pvalidate(unsigned long vaddr, bool rmp_psize, bool validate)
|
|||
|
||||
return rc;
|
||||
}
|
||||
|
||||
struct snp_guest_request_ioctl;
|
||||
|
||||
void setup_ghcb(void);
|
||||
void __init early_snp_set_memory_private(unsigned long vaddr, unsigned long paddr,
|
||||
unsigned int npages);
|
||||
|
|
@ -196,7 +201,7 @@ void snp_set_memory_private(unsigned long vaddr, unsigned int npages);
|
|||
void snp_set_wakeup_secondary_cpu(void);
|
||||
bool snp_init(struct boot_params *bp);
|
||||
void __init __noreturn snp_abort(void);
|
||||
int snp_issue_guest_request(u64 exit_code, struct snp_req_data *input, unsigned long *fw_err);
|
||||
int snp_issue_guest_request(u64 exit_code, struct snp_req_data *input, struct snp_guest_request_ioctl *rio);
|
||||
#else
|
||||
static inline void sev_es_ist_enter(struct pt_regs *regs) { }
|
||||
static inline void sev_es_ist_exit(void) { }
|
||||
|
|
@ -216,8 +221,7 @@ static inline void snp_set_memory_private(unsigned long vaddr, unsigned int npag
|
|||
static inline void snp_set_wakeup_secondary_cpu(void) { }
|
||||
static inline bool snp_init(struct boot_params *bp) { return false; }
|
||||
static inline void snp_abort(void) { }
|
||||
static inline int snp_issue_guest_request(u64 exit_code, struct snp_req_data *input,
|
||||
unsigned long *fw_err)
|
||||
static inline int snp_issue_guest_request(u64 exit_code, struct snp_req_data *input, struct snp_guest_request_ioctl *rio)
|
||||
{
|
||||
return -ENOTTY;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -259,11 +259,15 @@ struct x86_legacy_features {
|
|||
* VMMCALL under SEV-ES. Needs to return 'false'
|
||||
* if the checks fail. Called from the #VC
|
||||
* exception handler.
|
||||
* @is_private_mmio: For CoCo VMs, must map MMIO address as private.
|
||||
* Used when device is emulated by a paravisor
|
||||
* layer in the VM context.
|
||||
*/
|
||||
struct x86_hyper_runtime {
|
||||
void (*pin_vcpu)(int cpu);
|
||||
void (*sev_es_hcall_prepare)(struct ghcb *ghcb, struct pt_regs *regs);
|
||||
bool (*sev_es_hcall_finish)(struct ghcb *ghcb, struct pt_regs *regs);
|
||||
bool (*is_private_mmio)(u64 addr);
|
||||
};
|
||||
|
||||
/**
|
||||
|
|
|
|||
|
|
@ -66,6 +66,7 @@
|
|||
#include <asm/hw_irq.h>
|
||||
#include <asm/apic.h>
|
||||
#include <asm/pgtable.h>
|
||||
#include <asm/x86_init.h>
|
||||
|
||||
#define for_each_ioapic(idx) \
|
||||
for ((idx) = 0; (idx) < nr_ioapics; (idx)++)
|
||||
|
|
@ -2680,10 +2681,15 @@ static void io_apic_set_fixmap(enum fixed_addresses idx, phys_addr_t phys)
|
|||
pgprot_t flags = FIXMAP_PAGE_NOCACHE;
|
||||
|
||||
/*
|
||||
* Ensure fixmaps for IOAPIC MMIO respect memory encryption pgprot
|
||||
* Ensure fixmaps for IO-APIC MMIO respect memory encryption pgprot
|
||||
* bits, just like normal ioremap():
|
||||
*/
|
||||
flags = pgprot_decrypted(flags);
|
||||
if (cc_platform_has(CC_ATTR_GUEST_MEM_ENCRYPT)) {
|
||||
if (x86_platform.hyper.is_private_mmio(phys))
|
||||
flags = pgprot_encrypted(flags);
|
||||
else
|
||||
flags = pgprot_decrypted(flags);
|
||||
}
|
||||
|
||||
__set_fixmap(idx, phys, flags);
|
||||
}
|
||||
|
|
|
|||
|
|
@ -33,7 +33,6 @@
|
|||
#include <asm/nmi.h>
|
||||
#include <clocksource/hyperv_timer.h>
|
||||
#include <asm/numa.h>
|
||||
#include <asm/coco.h>
|
||||
|
||||
/* Is Linux running as the root partition? */
|
||||
bool hv_root_partition;
|
||||
|
|
@ -401,8 +400,10 @@ static void __init ms_hyperv_init_platform(void)
|
|||
if (ms_hyperv.priv_high & HV_ISOLATION) {
|
||||
ms_hyperv.isolation_config_a = cpuid_eax(HYPERV_CPUID_ISOLATION_CONFIG);
|
||||
ms_hyperv.isolation_config_b = cpuid_ebx(HYPERV_CPUID_ISOLATION_CONFIG);
|
||||
ms_hyperv.shared_gpa_boundary =
|
||||
BIT_ULL(ms_hyperv.shared_gpa_boundary_bits);
|
||||
|
||||
if (ms_hyperv.shared_gpa_boundary_active)
|
||||
ms_hyperv.shared_gpa_boundary =
|
||||
BIT_ULL(ms_hyperv.shared_gpa_boundary_bits);
|
||||
|
||||
pr_info("Hyper-V: Isolation Config: Group A 0x%x, Group B 0x%x\n",
|
||||
ms_hyperv.isolation_config_a, ms_hyperv.isolation_config_b);
|
||||
|
|
@ -413,11 +414,6 @@ static void __init ms_hyperv_init_platform(void)
|
|||
swiotlb_unencrypted_base = ms_hyperv.shared_gpa_boundary;
|
||||
#endif
|
||||
}
|
||||
/* Isolation VMs are unenlightened SEV-based VMs, thus this check: */
|
||||
if (IS_ENABLED(CONFIG_AMD_MEM_ENCRYPT)) {
|
||||
if (hv_get_isolation_type() != HV_ISOLATION_TYPE_NONE)
|
||||
cc_set_vendor(CC_VENDOR_HYPERV);
|
||||
}
|
||||
}
|
||||
|
||||
if (hv_max_functions_eax >= HYPERV_CPUID_NESTED_FEATURES) {
|
||||
|
|
@ -486,6 +482,9 @@ static void __init ms_hyperv_init_platform(void)
|
|||
i8253_clear_counter_on_shutdown = false;
|
||||
|
||||
#if IS_ENABLED(CONFIG_HYPERV)
|
||||
if ((hv_get_isolation_type() == HV_ISOLATION_TYPE_VBS) ||
|
||||
(hv_get_isolation_type() == HV_ISOLATION_TYPE_SNP))
|
||||
hv_vtom_init();
|
||||
/*
|
||||
* Setup the hook to get control post apic initialization.
|
||||
*/
|
||||
|
|
|
|||
|
|
@ -22,6 +22,8 @@
|
|||
#include <linux/efi.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/io.h>
|
||||
#include <linux/psp-sev.h>
|
||||
#include <uapi/linux/sev-guest.h>
|
||||
|
||||
#include <asm/cpu_entry_area.h>
|
||||
#include <asm/stacktrace.h>
|
||||
|
|
@ -2175,7 +2177,7 @@ static int __init init_sev_config(char *str)
|
|||
}
|
||||
__setup("sev=", init_sev_config);
|
||||
|
||||
int snp_issue_guest_request(u64 exit_code, struct snp_req_data *input, unsigned long *fw_err)
|
||||
int snp_issue_guest_request(u64 exit_code, struct snp_req_data *input, struct snp_guest_request_ioctl *rio)
|
||||
{
|
||||
struct ghcb_state state;
|
||||
struct es_em_ctxt ctxt;
|
||||
|
|
@ -2183,8 +2185,7 @@ int snp_issue_guest_request(u64 exit_code, struct snp_req_data *input, unsigned
|
|||
struct ghcb *ghcb;
|
||||
int ret;
|
||||
|
||||
if (!fw_err)
|
||||
return -EINVAL;
|
||||
rio->exitinfo2 = SEV_RET_NO_FW_CALL;
|
||||
|
||||
/*
|
||||
* __sev_get_ghcb() needs to run with IRQs disabled because it is using
|
||||
|
|
@ -2209,16 +2210,16 @@ int snp_issue_guest_request(u64 exit_code, struct snp_req_data *input, unsigned
|
|||
if (ret)
|
||||
goto e_put;
|
||||
|
||||
*fw_err = ghcb->save.sw_exit_info_2;
|
||||
switch (*fw_err) {
|
||||
rio->exitinfo2 = ghcb->save.sw_exit_info_2;
|
||||
switch (rio->exitinfo2) {
|
||||
case 0:
|
||||
break;
|
||||
|
||||
case SNP_GUEST_REQ_ERR_BUSY:
|
||||
case SNP_GUEST_VMM_ERR(SNP_GUEST_VMM_ERR_BUSY):
|
||||
ret = -EAGAIN;
|
||||
break;
|
||||
|
||||
case SNP_GUEST_REQ_INVALID_LEN:
|
||||
case SNP_GUEST_VMM_ERR(SNP_GUEST_VMM_ERR_INVALID_LEN):
|
||||
/* Number of expected pages are returned in RBX */
|
||||
if (exit_code == SVM_VMGEXIT_EXT_GUEST_REQUEST) {
|
||||
input->data_npages = ghcb_get_rbx(ghcb);
|
||||
|
|
|
|||
|
|
@ -134,6 +134,7 @@ static void enc_status_change_prepare_noop(unsigned long vaddr, int npages, bool
|
|||
static bool enc_status_change_finish_noop(unsigned long vaddr, int npages, bool enc) { return false; }
|
||||
static bool enc_tlb_flush_required_noop(bool enc) { return false; }
|
||||
static bool enc_cache_flush_required_noop(void) { return false; }
|
||||
static bool is_private_mmio_noop(u64 addr) {return false; }
|
||||
|
||||
struct x86_platform_ops x86_platform __ro_after_init = {
|
||||
.calibrate_cpu = native_calibrate_cpu_early,
|
||||
|
|
@ -149,6 +150,7 @@ struct x86_platform_ops x86_platform __ro_after_init = {
|
|||
.realmode_reserve = reserve_real_mode,
|
||||
.realmode_init = init_real_mode,
|
||||
.hyper.pin_vcpu = x86_op_int_noop,
|
||||
.hyper.is_private_mmio = is_private_mmio_noop,
|
||||
|
||||
.guest = {
|
||||
.enc_status_change_prepare = enc_status_change_prepare_noop,
|
||||
|
|
|
|||
|
|
@ -116,6 +116,11 @@ static void __ioremap_check_other(resource_size_t addr, struct ioremap_desc *des
|
|||
if (!cc_platform_has(CC_ATTR_GUEST_MEM_ENCRYPT))
|
||||
return;
|
||||
|
||||
if (x86_platform.hyper.is_private_mmio(addr)) {
|
||||
desc->flags |= IORES_MAP_ENCRYPTED;
|
||||
return;
|
||||
}
|
||||
|
||||
if (!IS_ENABLED(CONFIG_EFI))
|
||||
return;
|
||||
|
||||
|
|
|
|||
|
|
@ -513,10 +513,14 @@ void __init mem_encrypt_free_decrypted_mem(void)
|
|||
npages = (vaddr_end - vaddr) >> PAGE_SHIFT;
|
||||
|
||||
/*
|
||||
* The unused memory range was mapped decrypted, change the encryption
|
||||
* attribute from decrypted to encrypted before freeing it.
|
||||
* If the unused memory range was mapped decrypted, change the encryption
|
||||
* attribute from decrypted to encrypted before freeing it. Base the
|
||||
* re-encryption on the same condition used for the decryption in
|
||||
* sme_postprocess_startup(). Higher level abstractions, such as
|
||||
* CC_ATTR_MEM_ENCRYPT, aren't necessarily equivalent in a Hyper-V VM
|
||||
* using vTOM, where sme_me_mask is always zero.
|
||||
*/
|
||||
if (cc_platform_has(CC_ATTR_MEM_ENCRYPT)) {
|
||||
if (sme_me_mask) {
|
||||
r = set_memory_encrypted(vaddr, npages);
|
||||
if (r) {
|
||||
pr_warn("failed to free unused decrypted pages\n");
|
||||
|
|
|
|||
|
|
@ -2175,9 +2175,6 @@ static int __set_memory_enc_pgtable(unsigned long addr, int numpages, bool enc)
|
|||
|
||||
static int __set_memory_enc_dec(unsigned long addr, int numpages, bool enc)
|
||||
{
|
||||
if (hv_is_isolation_supported())
|
||||
return hv_set_mem_host_visibility(addr, numpages, !enc);
|
||||
|
||||
if (cc_platform_has(CC_ATTR_MEM_ENCRYPT))
|
||||
return __set_memory_enc_pgtable(addr, numpages, enc);
|
||||
|
||||
|
|
|
|||
|
|
@ -442,12 +442,19 @@ static int __sev_init_ex_locked(int *error)
|
|||
return __sev_do_cmd_locked(SEV_CMD_INIT_EX, &data, error);
|
||||
}
|
||||
|
||||
static inline int __sev_do_init_locked(int *psp_ret)
|
||||
{
|
||||
if (sev_init_ex_buffer)
|
||||
return __sev_init_ex_locked(psp_ret);
|
||||
else
|
||||
return __sev_init_locked(psp_ret);
|
||||
}
|
||||
|
||||
static int __sev_platform_init_locked(int *error)
|
||||
{
|
||||
int rc = 0, psp_ret = SEV_RET_NO_FW_CALL;
|
||||
struct psp_device *psp = psp_master;
|
||||
struct sev_device *sev;
|
||||
int rc = 0, psp_ret = -1;
|
||||
int (*init_function)(int *error);
|
||||
|
||||
if (!psp || !psp->sev_data)
|
||||
return -ENODEV;
|
||||
|
|
@ -458,15 +465,12 @@ static int __sev_platform_init_locked(int *error)
|
|||
return 0;
|
||||
|
||||
if (sev_init_ex_buffer) {
|
||||
init_function = __sev_init_ex_locked;
|
||||
rc = sev_read_init_ex_file();
|
||||
if (rc)
|
||||
return rc;
|
||||
} else {
|
||||
init_function = __sev_init_locked;
|
||||
}
|
||||
|
||||
rc = init_function(&psp_ret);
|
||||
rc = __sev_do_init_locked(&psp_ret);
|
||||
if (rc && psp_ret == SEV_RET_SECURE_DATA_INVALID) {
|
||||
/*
|
||||
* Initialization command returned an integrity check failure
|
||||
|
|
@ -475,9 +479,11 @@ static int __sev_platform_init_locked(int *error)
|
|||
* initialization function should succeed by replacing the state
|
||||
* with a reset state.
|
||||
*/
|
||||
dev_err(sev->dev, "SEV: retrying INIT command because of SECURE_DATA_INVALID error. Retrying once to reset PSP SEV state.");
|
||||
rc = init_function(&psp_ret);
|
||||
dev_err(sev->dev,
|
||||
"SEV: retrying INIT command because of SECURE_DATA_INVALID error. Retrying once to reset PSP SEV state.");
|
||||
rc = __sev_do_init_locked(&psp_ret);
|
||||
}
|
||||
|
||||
if (error)
|
||||
*error = psp_ret;
|
||||
|
||||
|
|
|
|||
|
|
@ -211,7 +211,7 @@ int hv_ringbuffer_init(struct hv_ring_buffer_info *ring_info,
|
|||
|
||||
ring_info->ring_buffer = (struct hv_ring_buffer *)
|
||||
vmap_pfn(pfns_wraparound, page_cnt * 2 - 1,
|
||||
PAGE_KERNEL);
|
||||
pgprot_decrypted(PAGE_KERNEL));
|
||||
kfree(pfns_wraparound);
|
||||
|
||||
if (!ring_info->ring_buffer)
|
||||
|
|
|
|||
|
|
@ -2156,7 +2156,6 @@ void vmbus_device_unregister(struct hv_device *device_obj)
|
|||
* VMBUS is an acpi enumerated device. Get the information we
|
||||
* need from DSDT.
|
||||
*/
|
||||
#define VTPM_BASE_ADDRESS 0xfed40000
|
||||
static acpi_status vmbus_walk_resources(struct acpi_resource *res, void *ctx)
|
||||
{
|
||||
resource_size_t start = 0;
|
||||
|
|
|
|||
|
|
@ -46,7 +46,15 @@ struct snp_guest_dev {
|
|||
|
||||
void *certs_data;
|
||||
struct snp_guest_crypto *crypto;
|
||||
/* request and response are in unencrypted memory */
|
||||
struct snp_guest_msg *request, *response;
|
||||
|
||||
/*
|
||||
* Avoid information leakage by double-buffering shared messages
|
||||
* in fields that are in regular encrypted memory.
|
||||
*/
|
||||
struct snp_guest_msg secret_request, secret_response;
|
||||
|
||||
struct snp_secrets_page_layout *layout;
|
||||
struct snp_req_data input;
|
||||
u32 *os_area_msg_seqno;
|
||||
|
|
@ -266,14 +274,17 @@ static int dec_payload(struct snp_guest_dev *snp_dev, struct snp_guest_msg *msg,
|
|||
static int verify_and_dec_payload(struct snp_guest_dev *snp_dev, void *payload, u32 sz)
|
||||
{
|
||||
struct snp_guest_crypto *crypto = snp_dev->crypto;
|
||||
struct snp_guest_msg *resp = snp_dev->response;
|
||||
struct snp_guest_msg *req = snp_dev->request;
|
||||
struct snp_guest_msg *resp = &snp_dev->secret_response;
|
||||
struct snp_guest_msg *req = &snp_dev->secret_request;
|
||||
struct snp_guest_msg_hdr *req_hdr = &req->hdr;
|
||||
struct snp_guest_msg_hdr *resp_hdr = &resp->hdr;
|
||||
|
||||
dev_dbg(snp_dev->dev, "response [seqno %lld type %d version %d sz %d]\n",
|
||||
resp_hdr->msg_seqno, resp_hdr->msg_type, resp_hdr->msg_version, resp_hdr->msg_sz);
|
||||
|
||||
/* Copy response from shared memory to encrypted memory. */
|
||||
memcpy(resp, snp_dev->response, sizeof(*resp));
|
||||
|
||||
/* Verify that the sequence counter is incremented by 1 */
|
||||
if (unlikely(resp_hdr->msg_seqno != (req_hdr->msg_seqno + 1)))
|
||||
return -EBADMSG;
|
||||
|
|
@ -297,7 +308,7 @@ static int verify_and_dec_payload(struct snp_guest_dev *snp_dev, void *payload,
|
|||
static int enc_payload(struct snp_guest_dev *snp_dev, u64 seqno, int version, u8 type,
|
||||
void *payload, size_t sz)
|
||||
{
|
||||
struct snp_guest_msg *req = snp_dev->request;
|
||||
struct snp_guest_msg *req = &snp_dev->secret_request;
|
||||
struct snp_guest_msg_hdr *hdr = &req->hdr;
|
||||
|
||||
memset(req, 0, sizeof(*req));
|
||||
|
|
@ -321,11 +332,12 @@ static int enc_payload(struct snp_guest_dev *snp_dev, u64 seqno, int version, u8
|
|||
return __enc_payload(snp_dev, req, payload, sz);
|
||||
}
|
||||
|
||||
static int __handle_guest_request(struct snp_guest_dev *snp_dev, u64 exit_code, __u64 *fw_err)
|
||||
static int __handle_guest_request(struct snp_guest_dev *snp_dev, u64 exit_code,
|
||||
struct snp_guest_request_ioctl *rio)
|
||||
{
|
||||
unsigned long err = 0xff, override_err = 0;
|
||||
unsigned long req_start = jiffies;
|
||||
unsigned int override_npages = 0;
|
||||
u64 override_err = 0;
|
||||
int rc;
|
||||
|
||||
retry_request:
|
||||
|
|
@ -335,7 +347,7 @@ retry_request:
|
|||
* sequence number must be incremented or the VMPCK must be deleted to
|
||||
* prevent reuse of the IV.
|
||||
*/
|
||||
rc = snp_issue_guest_request(exit_code, &snp_dev->input, &err);
|
||||
rc = snp_issue_guest_request(exit_code, &snp_dev->input, rio);
|
||||
switch (rc) {
|
||||
case -ENOSPC:
|
||||
/*
|
||||
|
|
@ -353,7 +365,7 @@ retry_request:
|
|||
* request buffer size was too small and give the caller the
|
||||
* required buffer size.
|
||||
*/
|
||||
override_err = SNP_GUEST_REQ_INVALID_LEN;
|
||||
override_err = SNP_GUEST_VMM_ERR(SNP_GUEST_VMM_ERR_INVALID_LEN);
|
||||
|
||||
/*
|
||||
* If this call to the firmware succeeds, the sequence number can
|
||||
|
|
@ -366,7 +378,7 @@ retry_request:
|
|||
goto retry_request;
|
||||
|
||||
/*
|
||||
* The host may return SNP_GUEST_REQ_ERR_EBUSY if the request has been
|
||||
* The host may return SNP_GUEST_VMM_ERR_BUSY if the request has been
|
||||
* throttled. Retry in the driver to avoid returning and reusing the
|
||||
* message sequence number on a different message.
|
||||
*/
|
||||
|
|
@ -387,27 +399,29 @@ retry_request:
|
|||
*/
|
||||
snp_inc_msg_seqno(snp_dev);
|
||||
|
||||
if (fw_err)
|
||||
*fw_err = override_err ?: err;
|
||||
if (override_err) {
|
||||
rio->exitinfo2 = override_err;
|
||||
|
||||
/*
|
||||
* If an extended guest request was issued and the supplied certificate
|
||||
* buffer was not large enough, a standard guest request was issued to
|
||||
* prevent IV reuse. If the standard request was successful, return -EIO
|
||||
* back to the caller as would have originally been returned.
|
||||
*/
|
||||
if (!rc && override_err == SNP_GUEST_VMM_ERR(SNP_GUEST_VMM_ERR_INVALID_LEN))
|
||||
rc = -EIO;
|
||||
}
|
||||
|
||||
if (override_npages)
|
||||
snp_dev->input.data_npages = override_npages;
|
||||
|
||||
/*
|
||||
* If an extended guest request was issued and the supplied certificate
|
||||
* buffer was not large enough, a standard guest request was issued to
|
||||
* prevent IV reuse. If the standard request was successful, return -EIO
|
||||
* back to the caller as would have originally been returned.
|
||||
*/
|
||||
if (!rc && override_err == SNP_GUEST_REQ_INVALID_LEN)
|
||||
return -EIO;
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
||||
static int handle_guest_request(struct snp_guest_dev *snp_dev, u64 exit_code, int msg_ver,
|
||||
u8 type, void *req_buf, size_t req_sz, void *resp_buf,
|
||||
u32 resp_sz, __u64 *fw_err)
|
||||
static int handle_guest_request(struct snp_guest_dev *snp_dev, u64 exit_code,
|
||||
struct snp_guest_request_ioctl *rio, u8 type,
|
||||
void *req_buf, size_t req_sz, void *resp_buf,
|
||||
u32 resp_sz)
|
||||
{
|
||||
u64 seqno;
|
||||
int rc;
|
||||
|
|
@ -417,19 +431,31 @@ static int handle_guest_request(struct snp_guest_dev *snp_dev, u64 exit_code, in
|
|||
if (!seqno)
|
||||
return -EIO;
|
||||
|
||||
/* Clear shared memory's response for the host to populate. */
|
||||
memset(snp_dev->response, 0, sizeof(struct snp_guest_msg));
|
||||
|
||||
/* Encrypt the userspace provided payload */
|
||||
rc = enc_payload(snp_dev, seqno, msg_ver, type, req_buf, req_sz);
|
||||
/* Encrypt the userspace provided payload in snp_dev->secret_request. */
|
||||
rc = enc_payload(snp_dev, seqno, rio->msg_version, type, req_buf, req_sz);
|
||||
if (rc)
|
||||
return rc;
|
||||
|
||||
rc = __handle_guest_request(snp_dev, exit_code, fw_err);
|
||||
/*
|
||||
* Write the fully encrypted request to the shared unencrypted
|
||||
* request page.
|
||||
*/
|
||||
memcpy(snp_dev->request, &snp_dev->secret_request,
|
||||
sizeof(snp_dev->secret_request));
|
||||
|
||||
rc = __handle_guest_request(snp_dev, exit_code, rio);
|
||||
if (rc) {
|
||||
if (rc == -EIO && *fw_err == SNP_GUEST_REQ_INVALID_LEN)
|
||||
if (rc == -EIO &&
|
||||
rio->exitinfo2 == SNP_GUEST_VMM_ERR(SNP_GUEST_VMM_ERR_INVALID_LEN))
|
||||
return rc;
|
||||
|
||||
dev_alert(snp_dev->dev, "Detected error from ASP request. rc: %d, fw_err: %llu\n", rc, *fw_err);
|
||||
dev_alert(snp_dev->dev,
|
||||
"Detected error from ASP request. rc: %d, exitinfo2: 0x%llx\n",
|
||||
rc, rio->exitinfo2);
|
||||
|
||||
snp_disable_vmpck(snp_dev);
|
||||
return rc;
|
||||
}
|
||||
|
|
@ -469,9 +495,9 @@ static int get_report(struct snp_guest_dev *snp_dev, struct snp_guest_request_io
|
|||
if (!resp)
|
||||
return -ENOMEM;
|
||||
|
||||
rc = handle_guest_request(snp_dev, SVM_VMGEXIT_GUEST_REQUEST, arg->msg_version,
|
||||
rc = handle_guest_request(snp_dev, SVM_VMGEXIT_GUEST_REQUEST, arg,
|
||||
SNP_MSG_REPORT_REQ, &req, sizeof(req), resp->data,
|
||||
resp_len, &arg->fw_err);
|
||||
resp_len);
|
||||
if (rc)
|
||||
goto e_free;
|
||||
|
||||
|
|
@ -509,9 +535,8 @@ static int get_derived_key(struct snp_guest_dev *snp_dev, struct snp_guest_reque
|
|||
if (copy_from_user(&req, (void __user *)arg->req_data, sizeof(req)))
|
||||
return -EFAULT;
|
||||
|
||||
rc = handle_guest_request(snp_dev, SVM_VMGEXIT_GUEST_REQUEST, arg->msg_version,
|
||||
SNP_MSG_KEY_REQ, &req, sizeof(req), buf, resp_len,
|
||||
&arg->fw_err);
|
||||
rc = handle_guest_request(snp_dev, SVM_VMGEXIT_GUEST_REQUEST, arg,
|
||||
SNP_MSG_KEY_REQ, &req, sizeof(req), buf, resp_len);
|
||||
if (rc)
|
||||
return rc;
|
||||
|
||||
|
|
@ -571,12 +596,12 @@ cmd:
|
|||
return -ENOMEM;
|
||||
|
||||
snp_dev->input.data_npages = npages;
|
||||
ret = handle_guest_request(snp_dev, SVM_VMGEXIT_EXT_GUEST_REQUEST, arg->msg_version,
|
||||
ret = handle_guest_request(snp_dev, SVM_VMGEXIT_EXT_GUEST_REQUEST, arg,
|
||||
SNP_MSG_REPORT_REQ, &req.data,
|
||||
sizeof(req.data), resp->data, resp_len, &arg->fw_err);
|
||||
sizeof(req.data), resp->data, resp_len);
|
||||
|
||||
/* If certs length is invalid then copy the returned length */
|
||||
if (arg->fw_err == SNP_GUEST_REQ_INVALID_LEN) {
|
||||
if (arg->vmm_error == SNP_GUEST_VMM_ERR_INVALID_LEN) {
|
||||
req.certs_len = snp_dev->input.data_npages << PAGE_SHIFT;
|
||||
|
||||
if (copy_to_user((void __user *)arg->req_data, &req, sizeof(req)))
|
||||
|
|
@ -611,7 +636,7 @@ static long snp_guest_ioctl(struct file *file, unsigned int ioctl, unsigned long
|
|||
if (copy_from_user(&input, argp, sizeof(input)))
|
||||
return -EFAULT;
|
||||
|
||||
input.fw_err = 0xff;
|
||||
input.exitinfo2 = 0xff;
|
||||
|
||||
/* Message version must be non-zero */
|
||||
if (!input.msg_version)
|
||||
|
|
@ -642,7 +667,7 @@ static long snp_guest_ioctl(struct file *file, unsigned int ioctl, unsigned long
|
|||
|
||||
mutex_unlock(&snp_cmd_mutex);
|
||||
|
||||
if (input.fw_err && copy_to_user(argp, &input, sizeof(input)))
|
||||
if (input.exitinfo2 && copy_to_user(argp, &input, sizeof(input)))
|
||||
return -EFAULT;
|
||||
|
||||
return ret;
|
||||
|
|
|
|||
|
|
@ -26,6 +26,8 @@
|
|||
#include <asm/ptrace.h>
|
||||
#include <asm/hyperv-tlfs.h>
|
||||
|
||||
#define VTPM_BASE_ADDRESS 0xfed40000
|
||||
|
||||
struct ms_hyperv_info {
|
||||
u32 features;
|
||||
u32 priv_high;
|
||||
|
|
|
|||
|
|
@ -36,6 +36,13 @@ enum {
|
|||
* SEV Firmware status code
|
||||
*/
|
||||
typedef enum {
|
||||
/*
|
||||
* This error code is not in the SEV spec. Its purpose is to convey that
|
||||
* there was an error that prevented the SEV firmware from being called.
|
||||
* The SEV API error codes are 16 bits, so the -1 value will not overlap
|
||||
* with possible values from the specification.
|
||||
*/
|
||||
SEV_RET_NO_FW_CALL = -1,
|
||||
SEV_RET_SUCCESS = 0,
|
||||
SEV_RET_INVALID_PLATFORM_STATE,
|
||||
SEV_RET_INVALID_GUEST_STATE,
|
||||
|
|
|
|||
|
|
@ -52,8 +52,14 @@ struct snp_guest_request_ioctl {
|
|||
__u64 req_data;
|
||||
__u64 resp_data;
|
||||
|
||||
/* firmware error code on failure (see psp-sev.h) */
|
||||
__u64 fw_err;
|
||||
/* bits[63:32]: VMM error code, bits[31:0] firmware error code (see psp-sev.h) */
|
||||
union {
|
||||
__u64 exitinfo2;
|
||||
struct {
|
||||
__u32 fw_error;
|
||||
__u32 vmm_error;
|
||||
};
|
||||
};
|
||||
};
|
||||
|
||||
struct snp_ext_report_req {
|
||||
|
|
@ -77,4 +83,12 @@ struct snp_ext_report_req {
|
|||
/* Get SNP extended report as defined in the GHCB specification version 2. */
|
||||
#define SNP_GET_EXT_REPORT _IOWR(SNP_GUEST_REQ_IOC_TYPE, 0x2, struct snp_guest_request_ioctl)
|
||||
|
||||
/* Guest message request EXIT_INFO_2 constants */
|
||||
#define SNP_GUEST_FW_ERR_MASK GENMASK_ULL(31, 0)
|
||||
#define SNP_GUEST_VMM_ERR_SHIFT 32
|
||||
#define SNP_GUEST_VMM_ERR(x) (((u64)x) << SNP_GUEST_VMM_ERR_SHIFT)
|
||||
|
||||
#define SNP_GUEST_VMM_ERR_INVALID_LEN 1
|
||||
#define SNP_GUEST_VMM_ERR_BUSY 2
|
||||
|
||||
#endif /* __UAPI_LINUX_SEV_GUEST_H_ */
|
||||
|
|
|
|||
19
init/main.c
19
init/main.c
|
|
@ -1092,14 +1092,6 @@ asmlinkage __visible void __init __no_sanitize_address start_kernel(void)
|
|||
*/
|
||||
locking_selftest();
|
||||
|
||||
/*
|
||||
* This needs to be called before any devices perform DMA
|
||||
* operations that might use the SWIOTLB bounce buffers. It will
|
||||
* mark the bounce buffers as decrypted so that their usage will
|
||||
* not cause "plain-text" data to be decrypted when accessed.
|
||||
*/
|
||||
mem_encrypt_init();
|
||||
|
||||
#ifdef CONFIG_BLK_DEV_INITRD
|
||||
if (initrd_start && !initrd_below_start_ok &&
|
||||
page_to_pfn(virt_to_page((void *)initrd_start)) < min_low_pfn) {
|
||||
|
|
@ -1116,6 +1108,17 @@ asmlinkage __visible void __init __no_sanitize_address start_kernel(void)
|
|||
late_time_init();
|
||||
sched_clock_init();
|
||||
calibrate_delay();
|
||||
|
||||
/*
|
||||
* This needs to be called before any devices perform DMA
|
||||
* operations that might use the SWIOTLB bounce buffers. It will
|
||||
* mark the bounce buffers as decrypted so that their usage will
|
||||
* not cause "plain-text" data to be decrypted when accessed. It
|
||||
* must be called after late_time_init() so that Hyper-V x86/x64
|
||||
* hypercalls work when the SWIOTLB bounce buffers are decrypted.
|
||||
*/
|
||||
mem_encrypt_init();
|
||||
|
||||
pid_idr_init();
|
||||
anon_vma_init();
|
||||
#ifdef CONFIG_X86
|
||||
|
|
|
|||
Loading…
Reference in New Issue