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Merge branch 'x86/urgent' into perf/core, to resolve conflict

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Resolve an MSR enumeration conflict.

Conflicts:
	arch/x86/include/asm/msr-index.h

Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar 2023-10-11 22:48:46 +02:00
commit 8f4156d587
5 changed files with 74 additions and 23 deletions
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7
arch/x86/include/asm/msr-index.h
View File

@ -637,11 +637,14 @@
/* AMD Last Branch Record MSRs */
#define MSR_AMD64_LBR_SELECT 0xc000010e
/* Fam 19h MSRs */
/* Fam 19h (Zen 4) MSRs */
#define MSR_F19H_UMC_PERF_CTL 0xc0010800
#define MSR_F19H_UMC_PERF_CTR 0xc0010801
/* Fam 17h MSRs */
#define MSR_ZEN4_BP_CFG 0xc001102e
#define MSR_ZEN4_BP_CFG_SHARED_BTB_FIX_BIT 5
/* Fam 17h (Zen 2) MSRs */
#define MSR_F17H_IRPERF 0xc00000e9
#define MSR_ZEN2_SPECTRAL_CHICKEN 0xc00110e3

8
arch/x86/kernel/cpu/amd.c
View File

@ -80,6 +80,10 @@ static const int amd_div0[] =
AMD_LEGACY_ERRATUM(AMD_MODEL_RANGE(0x17, 0x00, 0x0, 0x2f, 0xf),
AMD_MODEL_RANGE(0x17, 0x50, 0x0, 0x5f, 0xf));
static const int amd_erratum_1485[] =
AMD_LEGACY_ERRATUM(AMD_MODEL_RANGE(0x19, 0x10, 0x0, 0x1f, 0xf),
AMD_MODEL_RANGE(0x19, 0x60, 0x0, 0xaf, 0xf));
static bool cpu_has_amd_erratum(struct cpuinfo_x86 *cpu, const int *erratum)
{
int osvw_id = *erratum++;
@ -1149,6 +1153,10 @@ static void init_amd(struct cpuinfo_x86 *c)
pr_notice_once("AMD Zen1 DIV0 bug detected. Disable SMT for full protection.\n");
setup_force_cpu_bug(X86_BUG_DIV0);
}
if (!cpu_has(c, X86_FEATURE_HYPERVISOR) &&
cpu_has_amd_erratum(c, amd_erratum_1485))
msr_set_bit(MSR_ZEN4_BP_CFG, MSR_ZEN4_BP_CFG_SHARED_BTB_FIX_BIT);
}
#ifdef CONFIG_X86_32

10
arch/x86/kernel/cpu/resctrl/monitor.c
View File

@ -30,15 +30,15 @@ struct rmid_entry {
struct list_head list;
};
/**
* @rmid_free_lru A least recently used list of free RMIDs
/*
* @rmid_free_lru - A least recently used list of free RMIDs
* These RMIDs are guaranteed to have an occupancy less than the
* threshold occupancy
*/
static LIST_HEAD(rmid_free_lru);
/**
* @rmid_limbo_count count of currently unused but (potentially)
/*
* @rmid_limbo_count - count of currently unused but (potentially)
* dirty RMIDs.
* This counts RMIDs that no one is currently using but that
* may have a occupancy value > resctrl_rmid_realloc_threshold. User can
@ -46,7 +46,7 @@ static LIST_HEAD(rmid_free_lru);
*/
static unsigned int rmid_limbo_count;
/**
/*
* @rmid_entry - The entry in the limbo and free lists.
*/
static struct rmid_entry *rmid_ptrs;

69
arch/x86/kernel/sev-shared.c
View File

@ -256,7 +256,7 @@ static int __sev_cpuid_hv(u32 fn, int reg_idx, u32 *reg)
return 0;
}
static int sev_cpuid_hv(struct cpuid_leaf *leaf)
static int __sev_cpuid_hv_msr(struct cpuid_leaf *leaf)
{
int ret;
@ -279,6 +279,45 @@ static int sev_cpuid_hv(struct cpuid_leaf *leaf)
return ret;
}
static int __sev_cpuid_hv_ghcb(struct ghcb *ghcb, struct es_em_ctxt *ctxt, struct cpuid_leaf *leaf)
{
u32 cr4 = native_read_cr4();
int ret;
ghcb_set_rax(ghcb, leaf->fn);
ghcb_set_rcx(ghcb, leaf->subfn);
if (cr4 & X86_CR4_OSXSAVE)
/* Safe to read xcr0 */
ghcb_set_xcr0(ghcb, xgetbv(XCR_XFEATURE_ENABLED_MASK));
else
/* xgetbv will cause #UD - use reset value for xcr0 */
ghcb_set_xcr0(ghcb, 1);
ret = sev_es_ghcb_hv_call(ghcb, ctxt, SVM_EXIT_CPUID, 0, 0);
if (ret != ES_OK)
return ret;
if (!(ghcb_rax_is_valid(ghcb) &&
ghcb_rbx_is_valid(ghcb) &&
ghcb_rcx_is_valid(ghcb) &&
ghcb_rdx_is_valid(ghcb)))
return ES_VMM_ERROR;
leaf->eax = ghcb->save.rax;
leaf->ebx = ghcb->save.rbx;
leaf->ecx = ghcb->save.rcx;
leaf->edx = ghcb->save.rdx;
return ES_OK;
}
static int sev_cpuid_hv(struct ghcb *ghcb, struct es_em_ctxt *ctxt, struct cpuid_leaf *leaf)
{
return ghcb ? __sev_cpuid_hv_ghcb(ghcb, ctxt, leaf)
: __sev_cpuid_hv_msr(leaf);
}
/*
* This may be called early while still running on the initial identity
* mapping. Use RIP-relative addressing to obtain the correct address
@ -388,19 +427,20 @@ snp_cpuid_get_validated_func(struct cpuid_leaf *leaf)
return false;
}
static void snp_cpuid_hv(struct cpuid_leaf *leaf)
static void snp_cpuid_hv(struct ghcb *ghcb, struct es_em_ctxt *ctxt, struct cpuid_leaf *leaf)
{
if (sev_cpuid_hv(leaf))
if (sev_cpuid_hv(ghcb, ctxt, leaf))
sev_es_terminate(SEV_TERM_SET_LINUX, GHCB_TERM_CPUID_HV);
}
static int snp_cpuid_postprocess(struct cpuid_leaf *leaf)
static int snp_cpuid_postprocess(struct ghcb *ghcb, struct es_em_ctxt *ctxt,
struct cpuid_leaf *leaf)
{
struct cpuid_leaf leaf_hv = *leaf;
switch (leaf->fn) {
case 0x1:
snp_cpuid_hv(&leaf_hv);
snp_cpuid_hv(ghcb, ctxt, &leaf_hv);
/* initial APIC ID */
leaf->ebx = (leaf_hv.ebx & GENMASK(31, 24)) | (leaf->ebx & GENMASK(23, 0));
@ -419,7 +459,7 @@ static int snp_cpuid_postprocess(struct cpuid_leaf *leaf)
break;
case 0xB:
leaf_hv.subfn = 0;
snp_cpuid_hv(&leaf_hv);
snp_cpuid_hv(ghcb, ctxt, &leaf_hv);
/* extended APIC ID */
leaf->edx = leaf_hv.edx;
@ -467,7 +507,7 @@ static int snp_cpuid_postprocess(struct cpuid_leaf *leaf)
}
break;
case 0x8000001E:
snp_cpuid_hv(&leaf_hv);
snp_cpuid_hv(ghcb, ctxt, &leaf_hv);
/* extended APIC ID */
leaf->eax = leaf_hv.eax;
@ -488,7 +528,7 @@ static int snp_cpuid_postprocess(struct cpuid_leaf *leaf)
* Returns -EOPNOTSUPP if feature not enabled. Any other non-zero return value
* should be treated as fatal by caller.
*/
static int snp_cpuid(struct cpuid_leaf *leaf)
static int snp_cpuid(struct ghcb *ghcb, struct es_em_ctxt *ctxt, struct cpuid_leaf *leaf)
{
const struct snp_cpuid_table *cpuid_table = snp_cpuid_get_table();
@ -522,7 +562,7 @@ static int snp_cpuid(struct cpuid_leaf *leaf)
return 0;
}
return snp_cpuid_postprocess(leaf);
return snp_cpuid_postprocess(ghcb, ctxt, leaf);
}
/*
@ -544,14 +584,14 @@ void __init do_vc_no_ghcb(struct pt_regs *regs, unsigned long exit_code)
leaf.fn = fn;
leaf.subfn = subfn;
ret = snp_cpuid(&leaf);
ret = snp_cpuid(NULL, NULL, &leaf);
if (!ret)
goto cpuid_done;
if (ret != -EOPNOTSUPP)
goto fail;
if (sev_cpuid_hv(&leaf))
if (__sev_cpuid_hv_msr(&leaf))
goto fail;
cpuid_done:
@ -848,14 +888,15 @@ static enum es_result vc_handle_ioio(struct ghcb *ghcb, struct es_em_ctxt *ctxt)
return ret;
}
static int vc_handle_cpuid_snp(struct pt_regs *regs)
static int vc_handle_cpuid_snp(struct ghcb *ghcb, struct es_em_ctxt *ctxt)
{
struct pt_regs *regs = ctxt->regs;
struct cpuid_leaf leaf;
int ret;
leaf.fn = regs->ax;
leaf.subfn = regs->cx;
ret = snp_cpuid(&leaf);
ret = snp_cpuid(ghcb, ctxt, &leaf);
if (!ret) {
regs->ax = leaf.eax;
regs->bx = leaf.ebx;
@ -874,7 +915,7 @@ static enum es_result vc_handle_cpuid(struct ghcb *ghcb,
enum es_result ret;
int snp_cpuid_ret;
snp_cpuid_ret = vc_handle_cpuid_snp(regs);
snp_cpuid_ret = vc_handle_cpuid_snp(ghcb, ctxt);
if (!snp_cpuid_ret)
return ES_OK;
if (snp_cpuid_ret != -EOPNOTSUPP)

3
arch/x86/kernel/sev.c
View File

@ -868,8 +868,7 @@ void snp_set_memory_private(unsigned long vaddr, unsigned long npages)
void snp_accept_memory(phys_addr_t start, phys_addr_t end)
{
unsigned long vaddr;
unsigned int npages;
unsigned long vaddr, npages;
if (!cc_platform_has(CC_ATTR_GUEST_SEV_SNP))
return;