Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Common Ultravisor functions and initialization
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright IBM Corp. 2019, 2020
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #define KMSG_COMPONENT "prot_virt"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/sizes.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/bitmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/memblock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/pagemap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/swap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <asm/facility.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <asm/sections.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <asm/uv.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) /* the bootdata_preserved fields come from ones in arch/s390/boot/uv.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #ifdef CONFIG_PROTECTED_VIRTUALIZATION_GUEST
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) int __bootdata_preserved(prot_virt_guest);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) struct uv_info __bootdata_preserved(uv_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #if IS_ENABLED(CONFIG_KVM)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) int __bootdata_preserved(prot_virt_host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) EXPORT_SYMBOL(prot_virt_host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) EXPORT_SYMBOL(uv_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) static int __init uv_init(unsigned long stor_base, unsigned long stor_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	struct uv_cb_init uvcb = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 		.header.cmd = UVC_CMD_INIT_UV,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 		.header.len = sizeof(uvcb),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 		.stor_origin = stor_base,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 		.stor_len = stor_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	if (uv_call(0, (uint64_t)&uvcb)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 		pr_err("Ultravisor init failed with rc: 0x%x rrc: 0%x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 		       uvcb.header.rc, uvcb.header.rrc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) void __init setup_uv(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	unsigned long uv_stor_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	 * keep these conditions in line with kasan init code has_uv_sec_stor_limit()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	if (!is_prot_virt_host())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	if (is_prot_virt_guest()) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 		prot_virt_host = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 		pr_warn("Protected virtualization not available in protected guests.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	if (!test_facility(158)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 		prot_virt_host = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 		pr_warn("Protected virtualization not supported by the hardware.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	uv_stor_base = (unsigned long)memblock_alloc_try_nid(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 		uv_info.uv_base_stor_len, SZ_1M, SZ_2G,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 		MEMBLOCK_ALLOC_ACCESSIBLE, NUMA_NO_NODE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	if (!uv_stor_base) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 		pr_warn("Failed to reserve %lu bytes for ultravisor base storage\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 			uv_info.uv_base_stor_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 		goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	if (uv_init(uv_stor_base, uv_info.uv_base_stor_len)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 		memblock_free(uv_stor_base, uv_info.uv_base_stor_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 		goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	pr_info("Reserving %luMB as ultravisor base storage\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 		uv_info.uv_base_stor_len >> 20);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	pr_info("Disabling support for protected virtualization");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	prot_virt_host = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) void adjust_to_uv_max(unsigned long *vmax)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	if (uv_info.max_sec_stor_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 		*vmax = min_t(unsigned long, *vmax, uv_info.max_sec_stor_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)  * Requests the Ultravisor to pin the page in the shared state. This will
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)  * cause an intercept when the guest attempts to unshare the pinned page.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) static int uv_pin_shared(unsigned long paddr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	struct uv_cb_cfs uvcb = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 		.header.cmd = UVC_CMD_PIN_PAGE_SHARED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 		.header.len = sizeof(uvcb),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 		.paddr = paddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	if (uv_call(0, (u64)&uvcb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)  * Requests the Ultravisor to destroy a guest page and make it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)  * accessible to the host. The destroy clears the page instead of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)  * exporting.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)  * @paddr: Absolute host address of page to be destroyed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) int uv_destroy_page(unsigned long paddr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	struct uv_cb_cfs uvcb = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 		.header.cmd = UVC_CMD_DESTR_SEC_STOR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 		.header.len = sizeof(uvcb),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 		.paddr = paddr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	if (uv_call(0, (u64)&uvcb)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 		 * Older firmware uses 107/d as an indication of a non secure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 		 * page. Let us emulate the newer variant (no-op).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 		if (uvcb.header.rc == 0x107 && uvcb.header.rrc == 0xd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 			return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)  * Requests the Ultravisor to encrypt a guest page and make it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)  * accessible to the host for paging (export).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)  * @paddr: Absolute host address of page to be exported
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) int uv_convert_from_secure(unsigned long paddr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	struct uv_cb_cfs uvcb = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 		.header.cmd = UVC_CMD_CONV_FROM_SEC_STOR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 		.header.len = sizeof(uvcb),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 		.paddr = paddr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	if (uv_call(0, (u64)&uvcb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)  * Calculate the expected ref_count for a page that would otherwise have no
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)  * further pins. This was cribbed from similar functions in other places in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)  * the kernel, but with some slight modifications. We know that a secure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)  * page can not be a huge page for example.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) static int expected_page_refs(struct page *page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	int res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	res = page_mapcount(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	if (PageSwapCache(page)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 		res++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	} else if (page_mapping(page)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 		res++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 		if (page_has_private(page))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 			res++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) static int make_secure_pte(pte_t *ptep, unsigned long addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 			   struct page *exp_page, struct uv_cb_header *uvcb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	pte_t entry = READ_ONCE(*ptep);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	struct page *page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	int expected, rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	if (!pte_present(entry))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 		return -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	if (pte_val(entry) & _PAGE_INVALID)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 		return -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	page = pte_page(entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	if (page != exp_page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 		return -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	if (PageWriteback(page))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 		return -EAGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	expected = expected_page_refs(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	if (!page_ref_freeze(page, expected))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 		return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	set_bit(PG_arch_1, &page->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	rc = uv_call(0, (u64)uvcb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	page_ref_unfreeze(page, expected);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	/* Return -ENXIO if the page was not mapped, -EINVAL otherwise */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 		rc = uvcb->rc == 0x10a ? -ENXIO : -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214)  * Requests the Ultravisor to make a page accessible to a guest.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215)  * If it's brought in the first time, it will be cleared. If
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216)  * it has been exported before, it will be decrypted and integrity
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)  * checked.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) int gmap_make_secure(struct gmap *gmap, unsigned long gaddr, void *uvcb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	struct vm_area_struct *vma;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	bool local_drain = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	spinlock_t *ptelock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	unsigned long uaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	struct page *page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	pte_t *ptep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) again:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	rc = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	mmap_read_lock(gmap->mm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	uaddr = __gmap_translate(gmap, gaddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	if (IS_ERR_VALUE(uaddr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	vma = find_vma(gmap->mm, uaddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	if (!vma)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	 * Secure pages cannot be huge and userspace should not combine both.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	 * In case userspace does it anyway this will result in an -EFAULT for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	 * the unpack. The guest is thus never reaching secure mode. If
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	 * userspace is playing dirty tricky with mapping huge pages later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	 * on this will result in a segmentation fault.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	if (is_vm_hugetlb_page(vma))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	rc = -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	page = follow_page(vma, uaddr, FOLL_WRITE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	if (IS_ERR_OR_NULL(page))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	lock_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	ptep = get_locked_pte(gmap->mm, uaddr, &ptelock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	rc = make_secure_pte(ptep, uaddr, page, uvcb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	pte_unmap_unlock(ptep, ptelock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	unlock_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	mmap_read_unlock(gmap->mm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	if (rc == -EAGAIN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 		wait_on_page_writeback(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	} else if (rc == -EBUSY) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 		 * If we have tried a local drain and the page refcount
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 		 * still does not match our expected safe value, try with a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 		 * system wide drain. This is needed if the pagevecs holding
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 		 * the page are on a different CPU.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 		if (local_drain) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 			lru_add_drain_all();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 			/* We give up here, and let the caller try again */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 			return -EAGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 		 * We are here if the page refcount does not match the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 		 * expected safe value. The main culprits are usually
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 		 * pagevecs. With lru_add_drain() we drain the pagevecs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 		 * on the local CPU so that hopefully the refcount will
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 		 * reach the expected safe value.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 		lru_add_drain();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 		local_drain = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 		/* And now we try again immediately after draining */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 		goto again;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	} else if (rc == -ENXIO) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 		if (gmap_fault(gmap, gaddr, FAULT_FLAG_WRITE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 			return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 		return -EAGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) EXPORT_SYMBOL_GPL(gmap_make_secure);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) int gmap_convert_to_secure(struct gmap *gmap, unsigned long gaddr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 	struct uv_cb_cts uvcb = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 		.header.cmd = UVC_CMD_CONV_TO_SEC_STOR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 		.header.len = sizeof(uvcb),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 		.guest_handle = gmap->guest_handle,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 		.gaddr = gaddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 	};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 	return gmap_make_secure(gmap, gaddr, &uvcb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) EXPORT_SYMBOL_GPL(gmap_convert_to_secure);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310)  * To be called with the page locked or with an extra reference! This will
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311)  * prevent gmap_make_secure from touching the page concurrently. Having 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312)  * parallel make_page_accessible is fine, as the UV calls will become a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313)  * no-op if the page is already exported.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) int arch_make_page_accessible(struct page *page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 	int rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 	/* Hugepage cannot be protected, so nothing to do */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 	if (PageHuge(page))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 	 * PG_arch_1 is used in 3 places:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 	 * 1. for kernel page tables during early boot
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 	 * 2. for storage keys of huge pages and KVM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 	 * 3. As an indication that this page might be secure. This can
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 	 *    overindicate, e.g. we set the bit before calling
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 	 *    convert_to_secure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 	 * As secure pages are never huge, all 3 variants can co-exists.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 	if (!test_bit(PG_arch_1, &page->flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 	rc = uv_pin_shared(page_to_phys(page));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 	if (!rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 		clear_bit(PG_arch_1, &page->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 	rc = uv_convert_from_secure(page_to_phys(page));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 	if (!rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 		clear_bit(PG_arch_1, &page->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 	return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) EXPORT_SYMBOL_GPL(arch_make_page_accessible);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) #if defined(CONFIG_PROTECTED_VIRTUALIZATION_GUEST) || IS_ENABLED(CONFIG_KVM)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) static ssize_t uv_query_facilities(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 				   struct kobj_attribute *attr, char *page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 	return scnprintf(page, PAGE_SIZE, "%lx\n%lx\n%lx\n%lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 			uv_info.inst_calls_list[0],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 			uv_info.inst_calls_list[1],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 			uv_info.inst_calls_list[2],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 			uv_info.inst_calls_list[3]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) static struct kobj_attribute uv_query_facilities_attr =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 	__ATTR(facilities, 0444, uv_query_facilities, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) static ssize_t uv_query_feature_indications(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 					    struct kobj_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) 	return sysfs_emit(buf, "%lx\n", uv_info.uv_feature_indications);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) static struct kobj_attribute uv_query_feature_indications_attr =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) 	__ATTR(feature_indications, 0444, uv_query_feature_indications, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) static ssize_t uv_query_max_guest_cpus(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) 				       struct kobj_attribute *attr, char *page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) 	return scnprintf(page, PAGE_SIZE, "%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) 			uv_info.max_guest_cpu_id + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) static struct kobj_attribute uv_query_max_guest_cpus_attr =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) 	__ATTR(max_cpus, 0444, uv_query_max_guest_cpus, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) static ssize_t uv_query_max_guest_vms(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) 				      struct kobj_attribute *attr, char *page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) 	return scnprintf(page, PAGE_SIZE, "%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) 			uv_info.max_num_sec_conf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) static struct kobj_attribute uv_query_max_guest_vms_attr =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) 	__ATTR(max_guests, 0444, uv_query_max_guest_vms, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) static ssize_t uv_query_max_guest_addr(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) 				       struct kobj_attribute *attr, char *page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) 	return scnprintf(page, PAGE_SIZE, "%lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) 			uv_info.max_sec_stor_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) static struct kobj_attribute uv_query_max_guest_addr_attr =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) 	__ATTR(max_address, 0444, uv_query_max_guest_addr, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) static struct attribute *uv_query_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) 	&uv_query_facilities_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) 	&uv_query_feature_indications_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) 	&uv_query_max_guest_cpus_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) 	&uv_query_max_guest_vms_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) 	&uv_query_max_guest_addr_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) 	NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) static struct attribute_group uv_query_attr_group = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) 	.attrs = uv_query_attrs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) static struct kset *uv_query_kset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) static struct kobject *uv_kobj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) static int __init uv_info_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) 	int rc = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) 	if (!test_facility(158))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) 	uv_kobj = kobject_create_and_add("uv", firmware_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) 	if (!uv_kobj)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) 	uv_query_kset = kset_create_and_add("query", NULL, uv_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) 	if (!uv_query_kset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) 		goto out_kobj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) 	rc = sysfs_create_group(&uv_query_kset->kobj, &uv_query_attr_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) 	if (!rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) 	kset_unregister(uv_query_kset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) out_kobj:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) 	kobject_del(uv_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) 	kobject_put(uv_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) 	return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) device_initcall(uv_info_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) #endif