diff options
| author | Alexey Kardashevskiy <aik@amd.com> | 2025-12-02 13:44:46 +1100 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2025-12-02 12:05:51 -0800 |
| commit | 8a5dd102e48752f8c4144f051eccc602774f1a93 (patch) | |
| tree | 368f00857846c79fb02206138572124aea7676c9 /drivers/crypto | |
| parent | f7ae6d4ec6520a901787cbab273983e96d8516da (diff) | |
ccp: Make snp_reclaim_pages and __sev_do_cmd_locked public
The snp_reclaim_pages() helper reclaims pages in the FW state. SEV-TIO
and the TMPM driver (a hardware engine which smashes IOMMU PDEs among
other things) will use to reclaim memory when cleaning up.
Share and export snp_reclaim_pages().
Most of the SEV-TIO code uses sev_do_cmd() which locks the sev_cmd_mutex
and already exported. But the SNP init code (which also sets up SEV-TIO)
executes under the sev_cmd_mutex lock so the SEV-TIO code has to use
the __sev_do_cmd_locked() helper. This one though does not need to be
exported/shared globally as SEV-TIO is a part of the CCP driver still.
Share __sev_do_cmd_locked() via the CCP internal header.
Signed-off-by: Alexey Kardashevskiy <aik@amd.com>
Link: https://patch.msgid.link/20251202024449.542361-2-aik@amd.com
Acked-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/crypto')
| -rw-r--r-- | drivers/crypto/ccp/sev-dev.c | 11 | ||||
| -rw-r--r-- | drivers/crypto/ccp/sev-dev.h | 2 |
2 files changed, 5 insertions, 8 deletions
diff --git a/drivers/crypto/ccp/sev-dev.c b/drivers/crypto/ccp/sev-dev.c index 0d13d47c164b..9e0c16b36f9c 100644 --- a/drivers/crypto/ccp/sev-dev.c +++ b/drivers/crypto/ccp/sev-dev.c @@ -387,13 +387,7 @@ static int sev_write_init_ex_file_if_required(int cmd_id) return sev_write_init_ex_file(); } -/* - * snp_reclaim_pages() needs __sev_do_cmd_locked(), and __sev_do_cmd_locked() - * needs snp_reclaim_pages(), so a forward declaration is needed. - */ -static int __sev_do_cmd_locked(int cmd, void *data, int *psp_ret); - -static int snp_reclaim_pages(unsigned long paddr, unsigned int npages, bool locked) +int snp_reclaim_pages(unsigned long paddr, unsigned int npages, bool locked) { int ret, err, i; @@ -427,6 +421,7 @@ cleanup: snp_leak_pages(__phys_to_pfn(paddr), npages - i); return ret; } +EXPORT_SYMBOL_GPL(snp_reclaim_pages); static int rmp_mark_pages_firmware(unsigned long paddr, unsigned int npages, bool locked) { @@ -857,7 +852,7 @@ static int snp_reclaim_cmd_buf(int cmd, void *cmd_buf) return 0; } -static int __sev_do_cmd_locked(int cmd, void *data, int *psp_ret) +int __sev_do_cmd_locked(int cmd, void *data, int *psp_ret) { struct cmd_buf_desc desc_list[CMD_BUF_DESC_MAX] = {0}; struct psp_device *psp = psp_master; diff --git a/drivers/crypto/ccp/sev-dev.h b/drivers/crypto/ccp/sev-dev.h index ac03bd0848f7..b9029506383f 100644 --- a/drivers/crypto/ccp/sev-dev.h +++ b/drivers/crypto/ccp/sev-dev.h @@ -66,6 +66,8 @@ struct sev_device { int sev_dev_init(struct psp_device *psp); void sev_dev_destroy(struct psp_device *psp); +int __sev_do_cmd_locked(int cmd, void *data, int *psp_ret); + void sev_pci_init(void); void sev_pci_exit(void); |